diff --git a/go/Gopkg.lock b/go/Gopkg.lock
index 175a8dd..583f199 100644
--- a/go/Gopkg.lock
+++ b/go/Gopkg.lock
@@ -175,9 +175,14 @@
   version = "v0.17.2"
 
 [[projects]]
-  digest = "1:c8ad4ba32ae8b71ef2bf5e1bad402aeb99ce77a1240f9b684db8b1ff5353e7ab"
+  digest = "1:e7b2d33bb25e492a078f7aeb157906b3fc96d56ed0ae4186ee49259122ac487e"
   name = "github.com/gobuffalo/packr"
-  packages = ["."]
+  packages = [
+    ".",
+    "builder",
+    "packr",
+    "packr/cmd",
+  ]
   pruneopts = "UT"
   revision = "5a2cbb54c4e7d482e3f518c56f1f86f133d5204f"
   version = "v1.13.7"
@@ -191,11 +196,16 @@
   revision = "23def4e6c14b4da8ac2ed8007337bc5eb5007998"
 
 [[projects]]
-  digest = "1:5d1b5a25486fc7d4e133646d834f6fca7ba1cef9903d40e7aa786c41b89e9e91"
+  digest = "1:b00d66edb5f40dbbdcd37292851a61c2644356e37d8fb6517394ffb4b24b1c22"
   name = "github.com/golang/protobuf"
   packages = [
     "proto",
+    "protoc-gen-go",
     "protoc-gen-go/descriptor",
+    "protoc-gen-go/generator",
+    "protoc-gen-go/generator/internal/remap",
+    "protoc-gen-go/grpc",
+    "protoc-gen-go/plugin",
     "ptypes",
     "ptypes/any",
     "ptypes/duration",
@@ -206,6 +216,14 @@
   version = "v1.2.0"
 
 [[projects]]
+  digest = "1:870d441fe217b8e689d7949fef6e43efbc787e50f200cb1e70dbca9204a1d6be"
+  name = "github.com/inconshreveable/mousetrap"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "76626ae9c91c4f2a10f34cad8ce83ea42c93bb75"
+  version = "v1.0"
+
+[[projects]]
   branch = "master"
   digest = "1:84a5a2b67486d5d67060ac393aa255d05d24ed5ee41daecd5635ec22657b6492"
   name = "github.com/mailru/easyjson"
@@ -253,6 +271,22 @@
   revision = "3ec50d2876a36047b2ca39f955ba88fb7a455e92"
 
 [[projects]]
+  digest = "1:645cabccbb4fa8aab25a956cbcbdf6a6845ca736b2c64e197ca7cbb9d210b939"
+  name = "github.com/spf13/cobra"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "ef82de70bb3f60c65fb8eebacbb2d122ef517385"
+  version = "v0.0.3"
+
+[[projects]]
+  digest = "1:c1b1102241e7f645bc8e0c22ae352e8f0dc6484b6cb4d132fa9f24174e0119e2"
+  name = "github.com/spf13/pflag"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "298182f68c66c05229eb03ac171abe6e309ee79a"
+  version = "v1.0.3"
+
+[[projects]]
   digest = "1:564b31f09a21367ada5b019d8413afe99cf770775606f94c7bef42b2ef79dfdf"
   name = "github.com/ybbus/jsonrpc"
   packages = ["."]
@@ -286,6 +320,14 @@
 
 [[projects]]
   branch = "master"
+  digest = "1:39ebcc2b11457b703ae9ee2e8cca0f68df21969c6102cb3b705f76cca0ea0239"
+  name = "golang.org/x/sync"
+  packages = ["errgroup"]
+  pruneopts = "UT"
+  revision = "1d60e4601c6fd243af51cc01ddf169918a5407ca"
+
+[[projects]]
+  branch = "master"
   digest = "1:6c93c46c00889c28f5a105e7cb5ba56672fd4a2351375fa819acb44e66d427df"
   name = "golang.org/x/sys"
   packages = [
@@ -390,8 +432,10 @@
     "github.com/digitalocean/go-netbox/netbox/client/dcim",
     "github.com/digitalocean/go-netbox/netbox/models",
     "github.com/gobuffalo/packr",
+    "github.com/gobuffalo/packr/packr",
     "github.com/golang/glog",
     "github.com/golang/protobuf/proto",
+    "github.com/golang/protobuf/protoc-gen-go",
     "github.com/q3k/statusz",
     "github.com/ybbus/jsonrpc",
     "github.com/ziutek/telnet",
diff --git a/go/Gopkg.toml b/go/Gopkg.toml
index 150d321..7f8e8c3 100644
--- a/go/Gopkg.toml
+++ b/go/Gopkg.toml
@@ -24,6 +24,7 @@
 #   go-tests = true
 #   unused-packages = true
 
+required = ["github.com/golang/protobuf/protoc-gen-go", "github.com/gobuffalo/packr/packr"]
 
 [[constraint]]
   name = "github.com/cenkalti/backoff"
diff --git a/go/svc/topo/proto/generate.go b/go/svc/topo/proto/generate.go
index 4456a69..1a12b15 100644
--- a/go/svc/topo/proto/generate.go
+++ b/go/svc/topo/proto/generate.go
@@ -1,4 +1,3 @@
-//go:generate protoc -I.. ../control.proto --go_out=plugins=grpc:control
 //go:generate protoc -I.. ../config.proto --go_out=plugins=grpc:config
 
 package proto
diff --git a/go/vendor/github.com/gobuffalo/packr/builder/box.go b/go/vendor/github.com/gobuffalo/packr/builder/box.go
new file mode 100644
index 0000000..8490455
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/builder/box.go
@@ -0,0 +1,76 @@
+package builder
+
+import (
+	"bytes"
+	"compress/gzip"
+	"encoding/json"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/pkg/errors"
+)
+
+type box struct {
+	Name     string
+	Files    []file
+	compress bool
+}
+
+func (b *box) Walk(root string) error {
+	root, err := filepath.EvalSymlinks(root)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+	if _, err := os.Stat(root); err != nil {
+		// return nil
+		return errors.Errorf("could not find folder for box: %s", root)
+	}
+	return filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
+		if info == nil || info.IsDir() || strings.HasSuffix(info.Name(), "-packr.go") {
+			return nil
+		}
+		name := strings.Replace(path, root+string(os.PathSeparator), "", 1)
+		name = strings.Replace(name, "\\", "/", -1)
+		f := file{
+			Name: name,
+		}
+
+		DebugLog("packing file %s\n", f.Name)
+
+		bb, err := ioutil.ReadFile(path)
+		if err != nil {
+			return errors.WithStack(err)
+		}
+		if b.compress {
+			bb, err = compressFile(bb)
+			if err != nil {
+				return errors.WithStack(err)
+			}
+		}
+		bb, err = json.Marshal(bb)
+		if err != nil {
+			return errors.WithStack(err)
+		}
+		f.Contents = strings.Replace(string(bb), "\"", "\\\"", -1)
+
+		DebugLog("packed file %s\n", f.Name)
+		b.Files = append(b.Files, f)
+		return nil
+	})
+}
+
+func compressFile(bb []byte) ([]byte, error) {
+	var buf bytes.Buffer
+	writer := gzip.NewWriter(&buf)
+	_, err := writer.Write(bb)
+	if err != nil {
+		return bb, errors.WithStack(err)
+	}
+	err = writer.Close()
+	if err != nil {
+		return bb, errors.WithStack(err)
+	}
+	return buf.Bytes(), nil
+}
diff --git a/go/vendor/github.com/gobuffalo/packr/builder/builder.go b/go/vendor/github.com/gobuffalo/packr/builder/builder.go
new file mode 100644
index 0000000..1e00239
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/builder/builder.go
@@ -0,0 +1,172 @@
+package builder
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"sync"
+	"text/template"
+
+	"github.com/pkg/errors"
+	"golang.org/x/sync/errgroup"
+)
+
+var DebugLog func(string, ...interface{})
+
+func init() {
+	DebugLog = func(string, ...interface{}) {}
+}
+
+var invalidFilePattern = regexp.MustCompile(`(_test|-packr).go$`)
+
+// Builder scans folders/files looking for `packr.NewBox` and then compiling
+// the required static files into `<package-name>-packr.go` files so they can
+// be built into Go binaries.
+type Builder struct {
+	context.Context
+	RootPath       string
+	IgnoredBoxes   []string
+	IgnoredFolders []string
+	pkgs           map[string]pkg
+	moot           *sync.Mutex
+	Compress       bool
+}
+
+// Run the builder.
+func (b *Builder) Run() error {
+	wg := &errgroup.Group{}
+	root, err := filepath.EvalSymlinks(b.RootPath)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+	err = filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
+		if info == nil {
+			return filepath.SkipDir
+		}
+
+		base := strings.ToLower(filepath.Base(path))
+		if strings.HasPrefix(base, "_") {
+			return filepath.SkipDir
+		}
+		for _, f := range b.IgnoredFolders {
+			if strings.ToLower(f) == base {
+				if info.IsDir() {
+					return filepath.SkipDir
+				} else {
+					return nil
+				}
+			}
+		}
+		if !info.IsDir() {
+			wg.Go(func() error {
+				return b.process(path)
+			})
+		}
+		return nil
+	})
+	if err != nil {
+		return errors.WithStack(err)
+	}
+	if err := wg.Wait(); err != nil {
+		return errors.WithStack(err)
+	}
+	return b.dump()
+}
+
+func (b *Builder) dump() error {
+	for _, p := range b.pkgs {
+		name := filepath.Join(p.Dir, "a_"+p.Name+"-packr.go")
+		f, err := os.Create(name)
+		defer f.Close()
+		if err != nil {
+			return errors.WithStack(err)
+		}
+		t, err := template.New("").Parse(tmpl)
+
+		if err != nil {
+			return errors.WithStack(err)
+		}
+		err = t.Execute(f, p)
+		if err != nil {
+			return errors.WithStack(err)
+		}
+	}
+	return nil
+}
+
+func (b *Builder) process(path string) error {
+	ext := filepath.Ext(path)
+	if ext != ".go" || invalidFilePattern.MatchString(path) {
+		return nil
+	}
+
+	v := newVisitor(path)
+	if err := v.Run(); err != nil {
+		return errors.WithStack(err)
+	}
+
+	pk := pkg{
+		Dir:   filepath.Dir(path),
+		Boxes: []box{},
+		Name:  v.Package,
+	}
+
+	for _, n := range v.Boxes {
+		var ignored bool
+		for _, i := range b.IgnoredBoxes {
+			if n == i {
+				// this is an ignored box
+				ignored = true
+				break
+			}
+		}
+		if ignored {
+			continue
+		}
+		bx := &box{
+			Name:     n,
+			Files:    []file{},
+			compress: b.Compress,
+		}
+		DebugLog("building box %s\n", bx.Name)
+		p := filepath.Join(pk.Dir, bx.Name)
+		if err := bx.Walk(p); err != nil {
+			return errors.WithStack(err)
+		}
+		if len(bx.Files) > 0 {
+			pk.Boxes = append(pk.Boxes, *bx)
+		}
+		DebugLog("built box %s with %q\n", bx.Name, bx.Files)
+	}
+
+	if len(pk.Boxes) > 0 {
+		b.addPkg(pk)
+	}
+	return nil
+}
+
+func (b *Builder) addPkg(p pkg) {
+	b.moot.Lock()
+	defer b.moot.Unlock()
+	if _, ok := b.pkgs[p.Name]; !ok {
+		b.pkgs[p.Name] = p
+		return
+	}
+	pp := b.pkgs[p.Name]
+	pp.Boxes = append(pp.Boxes, p.Boxes...)
+	b.pkgs[p.Name] = pp
+}
+
+// New Builder with a given context and path
+func New(ctx context.Context, path string) *Builder {
+	return &Builder{
+		Context:        ctx,
+		RootPath:       path,
+		IgnoredBoxes:   []string{},
+		IgnoredFolders: []string{"vendor", ".git", "node_modules", ".idea"},
+		pkgs:           map[string]pkg{},
+		moot:           &sync.Mutex{},
+	}
+}
diff --git a/go/vendor/github.com/gobuffalo/packr/builder/clean.go b/go/vendor/github.com/gobuffalo/packr/builder/clean.go
new file mode 100644
index 0000000..688ebf5
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/builder/clean.go
@@ -0,0 +1,32 @@
+package builder
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/pkg/errors"
+)
+
+// Clean up an *-packr.go files
+func Clean(root string) {
+	root, _ = filepath.EvalSymlinks(root)
+	filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
+		base := filepath.Base(path)
+		if base == ".git" || base == "vendor" || base == "node_modules" {
+			return filepath.SkipDir
+		}
+		if info == nil || info.IsDir() {
+			return nil
+		}
+		if strings.Contains(base, "-packr.go") {
+			err := os.Remove(path)
+			if err != nil {
+				fmt.Println(err)
+				return errors.WithStack(err)
+			}
+		}
+		return nil
+	})
+}
diff --git a/go/vendor/github.com/gobuffalo/packr/builder/file.go b/go/vendor/github.com/gobuffalo/packr/builder/file.go
new file mode 100644
index 0000000..d439d49
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/builder/file.go
@@ -0,0 +1,10 @@
+package builder
+
+type file struct {
+	Name     string
+	Contents string
+}
+
+func (f file) String() string {
+	return f.Name
+}
diff --git a/go/vendor/github.com/gobuffalo/packr/builder/pkg.go b/go/vendor/github.com/gobuffalo/packr/builder/pkg.go
new file mode 100644
index 0000000..fbad2ac
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/builder/pkg.go
@@ -0,0 +1,7 @@
+package builder
+
+type pkg struct {
+	Name  string
+	Dir   string
+	Boxes []box
+}
diff --git a/go/vendor/github.com/gobuffalo/packr/builder/tmpl.go b/go/vendor/github.com/gobuffalo/packr/builder/tmpl.go
new file mode 100644
index 0000000..2b335ad
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/builder/tmpl.go
@@ -0,0 +1,18 @@
+package builder
+
+var tmpl = `// Code generated by github.com/gobuffalo/packr. DO NOT EDIT.
+
+package {{.Name}}
+
+import "github.com/gobuffalo/packr"
+
+// You can use the "packr clean" command to clean up this,
+// and any other packr generated files.
+func init() {
+	{{- range $box := .Boxes }}
+	{{- range .Files }}
+	packr.PackJSONBytes("{{$box.Name}}", "{{.Name}}", "{{.Contents}}")
+	{{- end }}
+	{{- end }}
+}
+`
diff --git a/go/vendor/github.com/gobuffalo/packr/builder/visitor.go b/go/vendor/github.com/gobuffalo/packr/builder/visitor.go
new file mode 100644
index 0000000..ea24bde
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/builder/visitor.go
@@ -0,0 +1,248 @@
+package builder
+
+import (
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"io/ioutil"
+	"sort"
+	"strings"
+
+	"github.com/pkg/errors"
+)
+
+type visitor struct {
+	Path    string
+	Package string
+	Boxes   []string
+	Errors  []error
+}
+
+func newVisitor(path string) *visitor {
+	return &visitor{
+		Path:   path,
+		Boxes:  []string{},
+		Errors: []error{},
+	}
+}
+
+func (v *visitor) Run() error {
+	b, err := ioutil.ReadFile(v.Path)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
+	fset := token.NewFileSet()
+	file, err := parser.ParseFile(fset, v.Path, string(b), parser.ParseComments)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
+	v.Package = file.Name.Name
+	ast.Walk(v, file)
+
+	m := map[string]string{}
+	for _, s := range v.Boxes {
+		m[s] = s
+	}
+	v.Boxes = []string{}
+	for k := range m {
+		v.Boxes = append(v.Boxes, k)
+	}
+
+	sort.Strings(v.Boxes)
+
+	if len(v.Errors) > 0 {
+		s := make([]string, len(v.Errors))
+		for i, e := range v.Errors {
+			s[i] = e.Error()
+		}
+		return errors.New(strings.Join(s, "\n"))
+	}
+	return nil
+}
+
+func (v *visitor) Visit(node ast.Node) ast.Visitor {
+	if node == nil {
+		return v
+	}
+	if err := v.eval(node); err != nil {
+		v.Errors = append(v.Errors, err)
+	}
+	return v
+}
+
+func (v *visitor) eval(node ast.Node) error {
+	switch t := node.(type) {
+	case *ast.CallExpr:
+		return v.evalExpr(t)
+	case *ast.Ident:
+		return v.evalIdent(t)
+	case *ast.GenDecl:
+		for _, n := range t.Specs {
+			if err := v.eval(n); err != nil {
+				return errors.WithStack(err)
+			}
+		}
+	case *ast.FuncDecl:
+		if t.Body == nil {
+			return nil
+		}
+		for _, b := range t.Body.List {
+			if err := v.evalStmt(b); err != nil {
+				return errors.WithStack(err)
+			}
+		}
+		return nil
+	case *ast.ValueSpec:
+		for _, e := range t.Values {
+			if err := v.evalExpr(e); err != nil {
+				return errors.WithStack(err)
+			}
+		}
+	}
+	return nil
+}
+
+func (v *visitor) evalStmt(stmt ast.Stmt) error {
+	switch t := stmt.(type) {
+	case *ast.ExprStmt:
+		return v.evalExpr(t.X)
+	case *ast.AssignStmt:
+		for _, e := range t.Rhs {
+			if err := v.evalArgs(e); err != nil {
+				return errors.WithStack(err)
+			}
+		}
+	}
+	return nil
+}
+
+func (v *visitor) evalExpr(expr ast.Expr) error {
+	switch t := expr.(type) {
+	case *ast.CallExpr:
+		if t.Fun == nil {
+			return nil
+		}
+		for _, a := range t.Args {
+			switch at := a.(type) {
+			case *ast.CallExpr:
+				if sel, ok := t.Fun.(*ast.SelectorExpr); ok {
+					return v.evalSelector(at, sel)
+				}
+
+				if err := v.evalArgs(at); err != nil {
+					return errors.WithStack(err)
+				}
+			case *ast.CompositeLit:
+				for _, e := range at.Elts {
+					if err := v.evalExpr(e); err != nil {
+						return errors.WithStack(err)
+					}
+				}
+			}
+		}
+		if ft, ok := t.Fun.(*ast.SelectorExpr); ok {
+			return v.evalSelector(t, ft)
+		}
+	case *ast.KeyValueExpr:
+		return v.evalExpr(t.Value)
+	}
+	return nil
+}
+
+func (v *visitor) evalArgs(expr ast.Expr) error {
+	switch at := expr.(type) {
+	case *ast.CompositeLit:
+		for _, e := range at.Elts {
+			if err := v.evalExpr(e); err != nil {
+				return errors.WithStack(err)
+			}
+		}
+	// case *ast.BasicLit:
+	// fmt.Println("evalArgs", at.Value)
+	// v.addBox(at.Value)
+	case *ast.CallExpr:
+		if at.Fun == nil {
+			return nil
+		}
+		switch st := at.Fun.(type) {
+		case *ast.SelectorExpr:
+			if err := v.evalSelector(at, st); err != nil {
+				return errors.WithStack(err)
+			}
+		case *ast.Ident:
+			return v.evalIdent(st)
+		}
+		for _, a := range at.Args {
+			if err := v.evalArgs(a); err != nil {
+				return errors.WithStack(err)
+			}
+		}
+	}
+	return nil
+}
+
+func (v *visitor) evalSelector(expr *ast.CallExpr, sel *ast.SelectorExpr) error {
+	x, ok := sel.X.(*ast.Ident)
+	if !ok {
+		return nil
+	}
+	if x.Name == "packr" && sel.Sel.Name == "NewBox" {
+		for _, e := range expr.Args {
+			switch at := e.(type) {
+			case *ast.Ident:
+				switch at.Obj.Kind {
+				case ast.Var:
+					if as, ok := at.Obj.Decl.(*ast.AssignStmt); ok {
+						v.addVariable(as)
+					}
+				case ast.Con:
+					if vs, ok := at.Obj.Decl.(*ast.ValueSpec); ok {
+						v.addConstant(vs)
+					}
+				}
+				return v.evalIdent(at)
+			case *ast.BasicLit:
+				v.addBox(at.Value)
+			case *ast.CallExpr:
+				return v.evalExpr(at)
+			}
+		}
+	}
+
+	return nil
+}
+
+func (v *visitor) evalIdent(i *ast.Ident) error {
+	if i.Obj == nil {
+		return nil
+	}
+	if s, ok := i.Obj.Decl.(*ast.AssignStmt); ok {
+		return v.evalStmt(s)
+	}
+	return nil
+}
+
+func (v *visitor) addBox(b string) {
+	b = strings.Replace(b, "\"", "", -1)
+	v.Boxes = append(v.Boxes, b)
+}
+
+func (v *visitor) addVariable(as *ast.AssignStmt) error {
+	if len(as.Rhs) == 1 {
+		if bs, ok := as.Rhs[0].(*ast.BasicLit); ok {
+			v.addBox(bs.Value)
+		}
+	}
+	return nil
+}
+
+func (v *visitor) addConstant(vs *ast.ValueSpec) error {
+	if len(vs.Values) == 1 {
+		if bs, ok := vs.Values[0].(*ast.BasicLit); ok {
+			v.addBox(bs.Value)
+		}
+	}
+	return nil
+}
diff --git a/go/vendor/github.com/gobuffalo/packr/packr/cmd/build.go b/go/vendor/github.com/gobuffalo/packr/packr/cmd/build.go
new file mode 100644
index 0000000..aaa640d
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/packr/cmd/build.go
@@ -0,0 +1,40 @@
+package cmd
+
+import (
+	"context"
+	"os"
+	"os/exec"
+
+	"github.com/gobuffalo/packr"
+	"github.com/gobuffalo/packr/builder"
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+// buildCmd represents the build command
+var buildCmd = &cobra.Command{
+	Use:                "build",
+	Short:              "Wraps the go build command with packr",
+	DisableFlagParsing: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		defer builder.Clean(input)
+		b := builder.New(context.Background(), input)
+		err := b.Run()
+		if err != nil {
+			return errors.WithStack(err)
+		}
+
+		cargs := []string{"build"}
+		cargs = append(cargs, args...)
+		cp := exec.Command(packr.GoBin(), cargs...)
+		cp.Stderr = os.Stderr
+		cp.Stdin = os.Stdin
+		cp.Stdout = os.Stdout
+
+		return cp.Run()
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(buildCmd)
+}
diff --git a/go/vendor/github.com/gobuffalo/packr/packr/cmd/clean.go b/go/vendor/github.com/gobuffalo/packr/packr/cmd/clean.go
new file mode 100644
index 0000000..3be7992
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/packr/cmd/clean.go
@@ -0,0 +1,18 @@
+package cmd
+
+import (
+	"github.com/gobuffalo/packr/builder"
+	"github.com/spf13/cobra"
+)
+
+var cleanCmd = &cobra.Command{
+	Use:   "clean",
+	Short: "removes any *-packr.go files",
+	Run: func(cmd *cobra.Command, args []string) {
+		builder.Clean(input)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(cleanCmd)
+}
diff --git a/go/vendor/github.com/gobuffalo/packr/packr/cmd/install.go b/go/vendor/github.com/gobuffalo/packr/packr/cmd/install.go
new file mode 100644
index 0000000..1c8b166
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/packr/cmd/install.go
@@ -0,0 +1,51 @@
+package cmd
+
+import (
+	"context"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"github.com/gobuffalo/packr"
+	"github.com/gobuffalo/packr/builder"
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+// installCmd represents the install command
+var installCmd = &cobra.Command{
+	Use:                "install",
+	Short:              "Wraps the go install command with packr",
+	DisableFlagParsing: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if len(args) > 0 {
+			input = args[len(args)-1]
+			if !strings.HasPrefix(input, ".") {
+				input = filepath.Join(packr.GoPath(), "src", input)
+				if _, err := os.Stat(input); err != nil {
+					return errors.WithStack(err)
+				}
+			}
+		}
+		defer builder.Clean(input)
+		b := builder.New(context.Background(), input)
+		err := b.Run()
+		if err != nil {
+			return errors.WithStack(err)
+		}
+
+		cargs := []string{"install"}
+		cargs = append(cargs, args...)
+		cp := exec.Command(packr.GoBin(), cargs...)
+		cp.Stderr = os.Stderr
+		cp.Stdin = os.Stdin
+		cp.Stdout = os.Stdout
+
+		return cp.Run()
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(installCmd)
+}
diff --git a/go/vendor/github.com/gobuffalo/packr/packr/cmd/root.go b/go/vendor/github.com/gobuffalo/packr/packr/cmd/root.go
new file mode 100644
index 0000000..94f1c55
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/packr/cmd/root.go
@@ -0,0 +1,55 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/gobuffalo/packr/builder"
+	"github.com/spf13/cobra"
+)
+
+var input string
+var compress bool
+var verbose bool
+
+var rootCmd = &cobra.Command{
+	Use:   "packr",
+	Short: "compiles static files into Go files",
+	PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
+		if !verbose {
+			for _, a := range args {
+				if a == "-v" {
+					verbose = true
+					break
+				}
+			}
+		}
+
+		if verbose {
+			builder.DebugLog = func(s string, a ...interface{}) {
+				os.Stdout.WriteString(fmt.Sprintf(s, a...))
+			}
+		}
+		return nil
+	},
+	RunE: func(cmd *cobra.Command, args []string) error {
+		b := builder.New(context.Background(), input)
+		b.Compress = compress
+		return b.Run()
+	},
+}
+
+func init() {
+	pwd, _ := os.Getwd()
+	rootCmd.Flags().StringVarP(&input, "input", "i", pwd, "path to scan for packr Boxes")
+	rootCmd.Flags().BoolVarP(&compress, "compress", "z", false, "compress box contents")
+	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "print verbose logging information")
+}
+
+// Execute the commands
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		os.Exit(-1)
+	}
+}
diff --git a/go/vendor/github.com/gobuffalo/packr/packr/main.go b/go/vendor/github.com/gobuffalo/packr/packr/main.go
new file mode 100644
index 0000000..c59a00b
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/packr/main.go
@@ -0,0 +1,21 @@
+// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import "github.com/gobuffalo/packr/packr/cmd"
+
+func main() {
+	cmd.Execute()
+}
diff --git a/go/vendor/github.com/golang/protobuf/protoc-gen-go/doc.go b/go/vendor/github.com/golang/protobuf/protoc-gen-go/doc.go
new file mode 100644
index 0000000..0d6055d
--- /dev/null
+++ b/go/vendor/github.com/golang/protobuf/protoc-gen-go/doc.go
@@ -0,0 +1,51 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/*
+	A plugin for the Google protocol buffer compiler to generate Go code.
+	Run it by building this program and putting it in your path with the name
+		protoc-gen-go
+	That word 'go' at the end becomes part of the option string set for the
+	protocol compiler, so once the protocol compiler (protoc) is installed
+	you can run
+		protoc --go_out=output_directory input_directory/file.proto
+	to generate Go bindings for the protocol defined by file.proto.
+	With that input, the output will be written to
+		output_directory/file.pb.go
+
+	The generated code is documented in the package comment for
+	the library.
+
+	See the README and documentation for protocol buffers to learn more:
+		https://developers.google.com/protocol-buffers/
+
+*/
+package documentation
diff --git a/go/vendor/github.com/golang/protobuf/protoc-gen-go/generator/generator.go b/go/vendor/github.com/golang/protobuf/protoc-gen-go/generator/generator.go
new file mode 100644
index 0000000..c13a9f1
--- /dev/null
+++ b/go/vendor/github.com/golang/protobuf/protoc-gen-go/generator/generator.go
@@ -0,0 +1,3086 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/*
+	The code generator for the plugin for the Google protocol buffer compiler.
+	It generates Go code from the protocol buffer description files read by the
+	main routine.
+*/
+package generator
+
+import (
+	"bufio"
+	"bytes"
+	"compress/gzip"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"go/build"
+	"go/parser"
+	"go/printer"
+	"go/token"
+	"log"
+	"os"
+	"path"
+	"sort"
+	"strconv"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/protoc-gen-go/generator/internal/remap"
+
+	"github.com/golang/protobuf/protoc-gen-go/descriptor"
+	plugin "github.com/golang/protobuf/protoc-gen-go/plugin"
+)
+
+// generatedCodeVersion indicates a version of the generated code.
+// It is incremented whenever an incompatibility between the generated code and
+// proto package is introduced; the generated code references
+// a constant, proto.ProtoPackageIsVersionN (where N is generatedCodeVersion).
+const generatedCodeVersion = 2
+
+// A Plugin provides functionality to add to the output during Go code generation,
+// such as to produce RPC stubs.
+type Plugin interface {
+	// Name identifies the plugin.
+	Name() string
+	// Init is called once after data structures are built but before
+	// code generation begins.
+	Init(g *Generator)
+	// Generate produces the code generated by the plugin for this file,
+	// except for the imports, by calling the generator's methods P, In, and Out.
+	Generate(file *FileDescriptor)
+	// GenerateImports produces the import declarations for this file.
+	// It is called after Generate.
+	GenerateImports(file *FileDescriptor)
+}
+
+var plugins []Plugin
+
+// RegisterPlugin installs a (second-order) plugin to be run when the Go output is generated.
+// It is typically called during initialization.
+func RegisterPlugin(p Plugin) {
+	plugins = append(plugins, p)
+}
+
+// A GoImportPath is the import path of a Go package. e.g., "google.golang.org/genproto/protobuf".
+type GoImportPath string
+
+func (p GoImportPath) String() string { return strconv.Quote(string(p)) }
+
+// A GoPackageName is the name of a Go package. e.g., "protobuf".
+type GoPackageName string
+
+// Each type we import as a protocol buffer (other than FileDescriptorProto) needs
+// a pointer to the FileDescriptorProto that represents it.  These types achieve that
+// wrapping by placing each Proto inside a struct with the pointer to its File. The
+// structs have the same names as their contents, with "Proto" removed.
+// FileDescriptor is used to store the things that it points to.
+
+// The file and package name method are common to messages and enums.
+type common struct {
+	file *FileDescriptor // File this object comes from.
+}
+
+// GoImportPath is the import path of the Go package containing the type.
+func (c *common) GoImportPath() GoImportPath {
+	return c.file.importPath
+}
+
+func (c *common) File() *FileDescriptor { return c.file }
+
+func fileIsProto3(file *descriptor.FileDescriptorProto) bool {
+	return file.GetSyntax() == "proto3"
+}
+
+func (c *common) proto3() bool { return fileIsProto3(c.file.FileDescriptorProto) }
+
+// Descriptor represents a protocol buffer message.
+type Descriptor struct {
+	common
+	*descriptor.DescriptorProto
+	parent   *Descriptor            // The containing message, if any.
+	nested   []*Descriptor          // Inner messages, if any.
+	enums    []*EnumDescriptor      // Inner enums, if any.
+	ext      []*ExtensionDescriptor // Extensions, if any.
+	typename []string               // Cached typename vector.
+	index    int                    // The index into the container, whether the file or another message.
+	path     string                 // The SourceCodeInfo path as comma-separated integers.
+	group    bool
+}
+
+// TypeName returns the elements of the dotted type name.
+// The package name is not part of this name.
+func (d *Descriptor) TypeName() []string {
+	if d.typename != nil {
+		return d.typename
+	}
+	n := 0
+	for parent := d; parent != nil; parent = parent.parent {
+		n++
+	}
+	s := make([]string, n)
+	for parent := d; parent != nil; parent = parent.parent {
+		n--
+		s[n] = parent.GetName()
+	}
+	d.typename = s
+	return s
+}
+
+// EnumDescriptor describes an enum. If it's at top level, its parent will be nil.
+// Otherwise it will be the descriptor of the message in which it is defined.
+type EnumDescriptor struct {
+	common
+	*descriptor.EnumDescriptorProto
+	parent   *Descriptor // The containing message, if any.
+	typename []string    // Cached typename vector.
+	index    int         // The index into the container, whether the file or a message.
+	path     string      // The SourceCodeInfo path as comma-separated integers.
+}
+
+// TypeName returns the elements of the dotted type name.
+// The package name is not part of this name.
+func (e *EnumDescriptor) TypeName() (s []string) {
+	if e.typename != nil {
+		return e.typename
+	}
+	name := e.GetName()
+	if e.parent == nil {
+		s = make([]string, 1)
+	} else {
+		pname := e.parent.TypeName()
+		s = make([]string, len(pname)+1)
+		copy(s, pname)
+	}
+	s[len(s)-1] = name
+	e.typename = s
+	return s
+}
+
+// Everything but the last element of the full type name, CamelCased.
+// The values of type Foo.Bar are call Foo_value1... not Foo_Bar_value1... .
+func (e *EnumDescriptor) prefix() string {
+	if e.parent == nil {
+		// If the enum is not part of a message, the prefix is just the type name.
+		return CamelCase(*e.Name) + "_"
+	}
+	typeName := e.TypeName()
+	return CamelCaseSlice(typeName[0:len(typeName)-1]) + "_"
+}
+
+// The integer value of the named constant in this enumerated type.
+func (e *EnumDescriptor) integerValueAsString(name string) string {
+	for _, c := range e.Value {
+		if c.GetName() == name {
+			return fmt.Sprint(c.GetNumber())
+		}
+	}
+	log.Fatal("cannot find value for enum constant")
+	return ""
+}
+
+// ExtensionDescriptor describes an extension. If it's at top level, its parent will be nil.
+// Otherwise it will be the descriptor of the message in which it is defined.
+type ExtensionDescriptor struct {
+	common
+	*descriptor.FieldDescriptorProto
+	parent *Descriptor // The containing message, if any.
+}
+
+// TypeName returns the elements of the dotted type name.
+// The package name is not part of this name.
+func (e *ExtensionDescriptor) TypeName() (s []string) {
+	name := e.GetName()
+	if e.parent == nil {
+		// top-level extension
+		s = make([]string, 1)
+	} else {
+		pname := e.parent.TypeName()
+		s = make([]string, len(pname)+1)
+		copy(s, pname)
+	}
+	s[len(s)-1] = name
+	return s
+}
+
+// DescName returns the variable name used for the generated descriptor.
+func (e *ExtensionDescriptor) DescName() string {
+	// The full type name.
+	typeName := e.TypeName()
+	// Each scope of the extension is individually CamelCased, and all are joined with "_" with an "E_" prefix.
+	for i, s := range typeName {
+		typeName[i] = CamelCase(s)
+	}
+	return "E_" + strings.Join(typeName, "_")
+}
+
+// ImportedDescriptor describes a type that has been publicly imported from another file.
+type ImportedDescriptor struct {
+	common
+	o Object
+}
+
+func (id *ImportedDescriptor) TypeName() []string { return id.o.TypeName() }
+
+// FileDescriptor describes an protocol buffer descriptor file (.proto).
+// It includes slices of all the messages and enums defined within it.
+// Those slices are constructed by WrapTypes.
+type FileDescriptor struct {
+	*descriptor.FileDescriptorProto
+	desc []*Descriptor          // All the messages defined in this file.
+	enum []*EnumDescriptor      // All the enums defined in this file.
+	ext  []*ExtensionDescriptor // All the top-level extensions defined in this file.
+	imp  []*ImportedDescriptor  // All types defined in files publicly imported by this file.
+
+	// Comments, stored as a map of path (comma-separated integers) to the comment.
+	comments map[string]*descriptor.SourceCodeInfo_Location
+
+	// The full list of symbols that are exported,
+	// as a map from the exported object to its symbols.
+	// This is used for supporting public imports.
+	exported map[Object][]symbol
+
+	fingerprint string        // Fingerprint of this file's contents.
+	importPath  GoImportPath  // Import path of this file's package.
+	packageName GoPackageName // Name of this file's Go package.
+
+	proto3 bool // whether to generate proto3 code for this file
+}
+
+// VarName is the variable name we'll use in the generated code to refer
+// to the compressed bytes of this descriptor. It is not exported, so
+// it is only valid inside the generated package.
+func (d *FileDescriptor) VarName() string {
+	name := strings.Map(badToUnderscore, baseName(d.GetName()))
+	return fmt.Sprintf("fileDescriptor_%s_%s", name, d.fingerprint)
+}
+
+// goPackageOption interprets the file's go_package option.
+// If there is no go_package, it returns ("", "", false).
+// If there's a simple name, it returns ("", pkg, true).
+// If the option implies an import path, it returns (impPath, pkg, true).
+func (d *FileDescriptor) goPackageOption() (impPath GoImportPath, pkg GoPackageName, ok bool) {
+	opt := d.GetOptions().GetGoPackage()
+	if opt == "" {
+		return "", "", false
+	}
+	// A semicolon-delimited suffix delimits the import path and package name.
+	sc := strings.Index(opt, ";")
+	if sc >= 0 {
+		return GoImportPath(opt[:sc]), cleanPackageName(opt[sc+1:]), true
+	}
+	// The presence of a slash implies there's an import path.
+	slash := strings.LastIndex(opt, "/")
+	if slash >= 0 {
+		return GoImportPath(opt), cleanPackageName(opt[slash+1:]), true
+	}
+	return "", cleanPackageName(opt), true
+}
+
+// goFileName returns the output name for the generated Go file.
+func (d *FileDescriptor) goFileName(pathType pathType) string {
+	name := *d.Name
+	if ext := path.Ext(name); ext == ".proto" || ext == ".protodevel" {
+		name = name[:len(name)-len(ext)]
+	}
+	name += ".pb.go"
+
+	if pathType == pathTypeSourceRelative {
+		return name
+	}
+
+	// Does the file have a "go_package" option?
+	// If it does, it may override the filename.
+	if impPath, _, ok := d.goPackageOption(); ok && impPath != "" {
+		// Replace the existing dirname with the declared import path.
+		_, name = path.Split(name)
+		name = path.Join(string(impPath), name)
+		return name
+	}
+
+	return name
+}
+
+func (d *FileDescriptor) addExport(obj Object, sym symbol) {
+	d.exported[obj] = append(d.exported[obj], sym)
+}
+
+// symbol is an interface representing an exported Go symbol.
+type symbol interface {
+	// GenerateAlias should generate an appropriate alias
+	// for the symbol from the named package.
+	GenerateAlias(g *Generator, pkg GoPackageName)
+}
+
+type messageSymbol struct {
+	sym                         string
+	hasExtensions, isMessageSet bool
+	oneofTypes                  []string
+}
+
+type getterSymbol struct {
+	name     string
+	typ      string
+	typeName string // canonical name in proto world; empty for proto.Message and similar
+	genType  bool   // whether typ contains a generated type (message/group/enum)
+}
+
+func (ms *messageSymbol) GenerateAlias(g *Generator, pkg GoPackageName) {
+	g.P("type ", ms.sym, " = ", pkg, ".", ms.sym)
+	for _, name := range ms.oneofTypes {
+		g.P("type ", name, " = ", pkg, ".", name)
+	}
+}
+
+type enumSymbol struct {
+	name   string
+	proto3 bool // Whether this came from a proto3 file.
+}
+
+func (es enumSymbol) GenerateAlias(g *Generator, pkg GoPackageName) {
+	s := es.name
+	g.P("type ", s, " = ", pkg, ".", s)
+	g.P("var ", s, "_name = ", pkg, ".", s, "_name")
+	g.P("var ", s, "_value = ", pkg, ".", s, "_value")
+}
+
+type constOrVarSymbol struct {
+	sym  string
+	typ  string // either "const" or "var"
+	cast string // if non-empty, a type cast is required (used for enums)
+}
+
+func (cs constOrVarSymbol) GenerateAlias(g *Generator, pkg GoPackageName) {
+	v := string(pkg) + "." + cs.sym
+	if cs.cast != "" {
+		v = cs.cast + "(" + v + ")"
+	}
+	g.P(cs.typ, " ", cs.sym, " = ", v)
+}
+
+// Object is an interface abstracting the abilities shared by enums, messages, extensions and imported objects.
+type Object interface {
+	GoImportPath() GoImportPath
+	TypeName() []string
+	File() *FileDescriptor
+}
+
+// Generator is the type whose methods generate the output, stored in the associated response structure.
+type Generator struct {
+	*bytes.Buffer
+
+	Request  *plugin.CodeGeneratorRequest  // The input.
+	Response *plugin.CodeGeneratorResponse // The output.
+
+	Param             map[string]string // Command-line parameters.
+	PackageImportPath string            // Go import path of the package we're generating code for
+	ImportPrefix      string            // String to prefix to imported package file names.
+	ImportMap         map[string]string // Mapping from .proto file name to import path
+
+	Pkg map[string]string // The names under which we import support packages
+
+	outputImportPath GoImportPath                   // Package we're generating code for.
+	allFiles         []*FileDescriptor              // All files in the tree
+	allFilesByName   map[string]*FileDescriptor     // All files by filename.
+	genFiles         []*FileDescriptor              // Those files we will generate output for.
+	file             *FileDescriptor                // The file we are compiling now.
+	packageNames     map[GoImportPath]GoPackageName // Imported package names in the current file.
+	usedPackages     map[GoImportPath]bool          // Packages used in current file.
+	usedPackageNames map[GoPackageName]bool         // Package names used in the current file.
+	typeNameToObject map[string]Object              // Key is a fully-qualified name in input syntax.
+	init             []string                       // Lines to emit in the init function.
+	indent           string
+	pathType         pathType // How to generate output filenames.
+	writeOutput      bool
+	annotateCode     bool                                       // whether to store annotations
+	annotations      []*descriptor.GeneratedCodeInfo_Annotation // annotations to store
+}
+
+type pathType int
+
+const (
+	pathTypeImport pathType = iota
+	pathTypeSourceRelative
+)
+
+// New creates a new generator and allocates the request and response protobufs.
+func New() *Generator {
+	g := new(Generator)
+	g.Buffer = new(bytes.Buffer)
+	g.Request = new(plugin.CodeGeneratorRequest)
+	g.Response = new(plugin.CodeGeneratorResponse)
+	return g
+}
+
+// Error reports a problem, including an error, and exits the program.
+func (g *Generator) Error(err error, msgs ...string) {
+	s := strings.Join(msgs, " ") + ":" + err.Error()
+	log.Print("protoc-gen-go: error:", s)
+	os.Exit(1)
+}
+
+// Fail reports a problem and exits the program.
+func (g *Generator) Fail(msgs ...string) {
+	s := strings.Join(msgs, " ")
+	log.Print("protoc-gen-go: error:", s)
+	os.Exit(1)
+}
+
+// CommandLineParameters breaks the comma-separated list of key=value pairs
+// in the parameter (a member of the request protobuf) into a key/value map.
+// It then sets file name mappings defined by those entries.
+func (g *Generator) CommandLineParameters(parameter string) {
+	g.Param = make(map[string]string)
+	for _, p := range strings.Split(parameter, ",") {
+		if i := strings.Index(p, "="); i < 0 {
+			g.Param[p] = ""
+		} else {
+			g.Param[p[0:i]] = p[i+1:]
+		}
+	}
+
+	g.ImportMap = make(map[string]string)
+	pluginList := "none" // Default list of plugin names to enable (empty means all).
+	for k, v := range g.Param {
+		switch k {
+		case "import_prefix":
+			g.ImportPrefix = v
+		case "import_path":
+			g.PackageImportPath = v
+		case "paths":
+			switch v {
+			case "import":
+				g.pathType = pathTypeImport
+			case "source_relative":
+				g.pathType = pathTypeSourceRelative
+			default:
+				g.Fail(fmt.Sprintf(`Unknown path type %q: want "import" or "source_relative".`, v))
+			}
+		case "plugins":
+			pluginList = v
+		case "annotate_code":
+			if v == "true" {
+				g.annotateCode = true
+			}
+		default:
+			if len(k) > 0 && k[0] == 'M' {
+				g.ImportMap[k[1:]] = v
+			}
+		}
+	}
+	if pluginList != "" {
+		// Amend the set of plugins.
+		enabled := make(map[string]bool)
+		for _, name := range strings.Split(pluginList, "+") {
+			enabled[name] = true
+		}
+		var nplugins []Plugin
+		for _, p := range plugins {
+			if enabled[p.Name()] {
+				nplugins = append(nplugins, p)
+			}
+		}
+		plugins = nplugins
+	}
+}
+
+// DefaultPackageName returns the package name printed for the object.
+// If its file is in a different package, it returns the package name we're using for this file, plus ".".
+// Otherwise it returns the empty string.
+func (g *Generator) DefaultPackageName(obj Object) string {
+	importPath := obj.GoImportPath()
+	if importPath == g.outputImportPath {
+		return ""
+	}
+	return string(g.GoPackageName(importPath)) + "."
+}
+
+// GoPackageName returns the name used for a package.
+func (g *Generator) GoPackageName(importPath GoImportPath) GoPackageName {
+	if name, ok := g.packageNames[importPath]; ok {
+		return name
+	}
+	name := cleanPackageName(baseName(string(importPath)))
+	for i, orig := 1, name; g.usedPackageNames[name]; i++ {
+		name = orig + GoPackageName(strconv.Itoa(i))
+	}
+	g.packageNames[importPath] = name
+	g.usedPackageNames[name] = true
+	return name
+}
+
+var globalPackageNames = map[GoPackageName]bool{
+	"fmt":   true,
+	"math":  true,
+	"proto": true,
+}
+
+// Create and remember a guaranteed unique package name. Pkg is the candidate name.
+// The FileDescriptor parameter is unused.
+func RegisterUniquePackageName(pkg string, f *FileDescriptor) string {
+	name := cleanPackageName(pkg)
+	for i, orig := 1, name; globalPackageNames[name]; i++ {
+		name = orig + GoPackageName(strconv.Itoa(i))
+	}
+	globalPackageNames[name] = true
+	return string(name)
+}
+
+var isGoKeyword = map[string]bool{
+	"break":       true,
+	"case":        true,
+	"chan":        true,
+	"const":       true,
+	"continue":    true,
+	"default":     true,
+	"else":        true,
+	"defer":       true,
+	"fallthrough": true,
+	"for":         true,
+	"func":        true,
+	"go":          true,
+	"goto":        true,
+	"if":          true,
+	"import":      true,
+	"interface":   true,
+	"map":         true,
+	"package":     true,
+	"range":       true,
+	"return":      true,
+	"select":      true,
+	"struct":      true,
+	"switch":      true,
+	"type":        true,
+	"var":         true,
+}
+
+func cleanPackageName(name string) GoPackageName {
+	name = strings.Map(badToUnderscore, name)
+	// Identifier must not be keyword: insert _.
+	if isGoKeyword[name] {
+		name = "_" + name
+	}
+	// Identifier must not begin with digit: insert _.
+	if r, _ := utf8.DecodeRuneInString(name); unicode.IsDigit(r) {
+		name = "_" + name
+	}
+	return GoPackageName(name)
+}
+
+// defaultGoPackage returns the package name to use,
+// derived from the import path of the package we're building code for.
+func (g *Generator) defaultGoPackage() GoPackageName {
+	p := g.PackageImportPath
+	if i := strings.LastIndex(p, "/"); i >= 0 {
+		p = p[i+1:]
+	}
+	return cleanPackageName(p)
+}
+
+// SetPackageNames sets the package name for this run.
+// The package name must agree across all files being generated.
+// It also defines unique package names for all imported files.
+func (g *Generator) SetPackageNames() {
+	g.outputImportPath = g.genFiles[0].importPath
+
+	defaultPackageNames := make(map[GoImportPath]GoPackageName)
+	for _, f := range g.genFiles {
+		if _, p, ok := f.goPackageOption(); ok {
+			defaultPackageNames[f.importPath] = p
+		}
+	}
+	for _, f := range g.genFiles {
+		if _, p, ok := f.goPackageOption(); ok {
+			// Source file: option go_package = "quux/bar";
+			f.packageName = p
+		} else if p, ok := defaultPackageNames[f.importPath]; ok {
+			// A go_package option in another file in the same package.
+			//
+			// This is a poor choice in general, since every source file should
+			// contain a go_package option. Supported mainly for historical
+			// compatibility.
+			f.packageName = p
+		} else if p := g.defaultGoPackage(); p != "" {
+			// Command-line: import_path=quux/bar.
+			//
+			// The import_path flag sets a package name for files which don't
+			// contain a go_package option.
+			f.packageName = p
+		} else if p := f.GetPackage(); p != "" {
+			// Source file: package quux.bar;
+			f.packageName = cleanPackageName(p)
+		} else {
+			// Source filename.
+			f.packageName = cleanPackageName(baseName(f.GetName()))
+		}
+	}
+
+	// Check that all files have a consistent package name and import path.
+	for _, f := range g.genFiles[1:] {
+		if a, b := g.genFiles[0].importPath, f.importPath; a != b {
+			g.Fail(fmt.Sprintf("inconsistent package import paths: %v, %v", a, b))
+		}
+		if a, b := g.genFiles[0].packageName, f.packageName; a != b {
+			g.Fail(fmt.Sprintf("inconsistent package names: %v, %v", a, b))
+		}
+	}
+
+	// Names of support packages. These never vary (if there are conflicts,
+	// we rename the conflicting package), so this could be removed someday.
+	g.Pkg = map[string]string{
+		"fmt":   "fmt",
+		"math":  "math",
+		"proto": "proto",
+	}
+}
+
+// WrapTypes walks the incoming data, wrapping DescriptorProtos, EnumDescriptorProtos
+// and FileDescriptorProtos into file-referenced objects within the Generator.
+// It also creates the list of files to generate and so should be called before GenerateAllFiles.
+func (g *Generator) WrapTypes() {
+	g.allFiles = make([]*FileDescriptor, 0, len(g.Request.ProtoFile))
+	g.allFilesByName = make(map[string]*FileDescriptor, len(g.allFiles))
+	genFileNames := make(map[string]bool)
+	for _, n := range g.Request.FileToGenerate {
+		genFileNames[n] = true
+	}
+	for _, f := range g.Request.ProtoFile {
+		fd := &FileDescriptor{
+			FileDescriptorProto: f,
+			exported:            make(map[Object][]symbol),
+			proto3:              fileIsProto3(f),
+		}
+		// The import path may be set in a number of ways.
+		if substitution, ok := g.ImportMap[f.GetName()]; ok {
+			// Command-line: M=foo.proto=quux/bar.
+			//
+			// Explicit mapping of source file to import path.
+			fd.importPath = GoImportPath(substitution)
+		} else if genFileNames[f.GetName()] && g.PackageImportPath != "" {
+			// Command-line: import_path=quux/bar.
+			//
+			// The import_path flag sets the import path for every file that
+			// we generate code for.
+			fd.importPath = GoImportPath(g.PackageImportPath)
+		} else if p, _, _ := fd.goPackageOption(); p != "" {
+			// Source file: option go_package = "quux/bar";
+			//
+			// The go_package option sets the import path. Most users should use this.
+			fd.importPath = p
+		} else {
+			// Source filename.
+			//
+			// Last resort when nothing else is available.
+			fd.importPath = GoImportPath(path.Dir(f.GetName()))
+		}
+		// We must wrap the descriptors before we wrap the enums
+		fd.desc = wrapDescriptors(fd)
+		g.buildNestedDescriptors(fd.desc)
+		fd.enum = wrapEnumDescriptors(fd, fd.desc)
+		g.buildNestedEnums(fd.desc, fd.enum)
+		fd.ext = wrapExtensions(fd)
+		extractComments(fd)
+		g.allFiles = append(g.allFiles, fd)
+		g.allFilesByName[f.GetName()] = fd
+	}
+	for _, fd := range g.allFiles {
+		fd.imp = wrapImported(fd, g)
+	}
+
+	g.genFiles = make([]*FileDescriptor, 0, len(g.Request.FileToGenerate))
+	for _, fileName := range g.Request.FileToGenerate {
+		fd := g.allFilesByName[fileName]
+		if fd == nil {
+			g.Fail("could not find file named", fileName)
+		}
+		fingerprint, err := fingerprintProto(fd.FileDescriptorProto)
+		if err != nil {
+			g.Error(err)
+		}
+		fd.fingerprint = fingerprint
+		g.genFiles = append(g.genFiles, fd)
+	}
+}
+
+// fingerprintProto returns a fingerprint for a message.
+// The fingerprint is intended to prevent conflicts between generated fileds,
+// not to provide cryptographic security.
+func fingerprintProto(m proto.Message) (string, error) {
+	b, err := proto.Marshal(m)
+	if err != nil {
+		return "", err
+	}
+	h := sha256.Sum256(b)
+	return hex.EncodeToString(h[:8]), nil
+}
+
+// Scan the descriptors in this file.  For each one, build the slice of nested descriptors
+func (g *Generator) buildNestedDescriptors(descs []*Descriptor) {
+	for _, desc := range descs {
+		if len(desc.NestedType) != 0 {
+			for _, nest := range descs {
+				if nest.parent == desc {
+					desc.nested = append(desc.nested, nest)
+				}
+			}
+			if len(desc.nested) != len(desc.NestedType) {
+				g.Fail("internal error: nesting failure for", desc.GetName())
+			}
+		}
+	}
+}
+
+func (g *Generator) buildNestedEnums(descs []*Descriptor, enums []*EnumDescriptor) {
+	for _, desc := range descs {
+		if len(desc.EnumType) != 0 {
+			for _, enum := range enums {
+				if enum.parent == desc {
+					desc.enums = append(desc.enums, enum)
+				}
+			}
+			if len(desc.enums) != len(desc.EnumType) {
+				g.Fail("internal error: enum nesting failure for", desc.GetName())
+			}
+		}
+	}
+}
+
+// Construct the Descriptor
+func newDescriptor(desc *descriptor.DescriptorProto, parent *Descriptor, file *FileDescriptor, index int) *Descriptor {
+	d := &Descriptor{
+		common:          common{file},
+		DescriptorProto: desc,
+		parent:          parent,
+		index:           index,
+	}
+	if parent == nil {
+		d.path = fmt.Sprintf("%d,%d", messagePath, index)
+	} else {
+		d.path = fmt.Sprintf("%s,%d,%d", parent.path, messageMessagePath, index)
+	}
+
+	// The only way to distinguish a group from a message is whether
+	// the containing message has a TYPE_GROUP field that matches.
+	if parent != nil {
+		parts := d.TypeName()
+		if file.Package != nil {
+			parts = append([]string{*file.Package}, parts...)
+		}
+		exp := "." + strings.Join(parts, ".")
+		for _, field := range parent.Field {
+			if field.GetType() == descriptor.FieldDescriptorProto_TYPE_GROUP && field.GetTypeName() == exp {
+				d.group = true
+				break
+			}
+		}
+	}
+
+	for _, field := range desc.Extension {
+		d.ext = append(d.ext, &ExtensionDescriptor{common{file}, field, d})
+	}
+
+	return d
+}
+
+// Return a slice of all the Descriptors defined within this file
+func wrapDescriptors(file *FileDescriptor) []*Descriptor {
+	sl := make([]*Descriptor, 0, len(file.MessageType)+10)
+	for i, desc := range file.MessageType {
+		sl = wrapThisDescriptor(sl, desc, nil, file, i)
+	}
+	return sl
+}
+
+// Wrap this Descriptor, recursively
+func wrapThisDescriptor(sl []*Descriptor, desc *descriptor.DescriptorProto, parent *Descriptor, file *FileDescriptor, index int) []*Descriptor {
+	sl = append(sl, newDescriptor(desc, parent, file, index))
+	me := sl[len(sl)-1]
+	for i, nested := range desc.NestedType {
+		sl = wrapThisDescriptor(sl, nested, me, file, i)
+	}
+	return sl
+}
+
+// Construct the EnumDescriptor
+func newEnumDescriptor(desc *descriptor.EnumDescriptorProto, parent *Descriptor, file *FileDescriptor, index int) *EnumDescriptor {
+	ed := &EnumDescriptor{
+		common:              common{file},
+		EnumDescriptorProto: desc,
+		parent:              parent,
+		index:               index,
+	}
+	if parent == nil {
+		ed.path = fmt.Sprintf("%d,%d", enumPath, index)
+	} else {
+		ed.path = fmt.Sprintf("%s,%d,%d", parent.path, messageEnumPath, index)
+	}
+	return ed
+}
+
+// Return a slice of all the EnumDescriptors defined within this file
+func wrapEnumDescriptors(file *FileDescriptor, descs []*Descriptor) []*EnumDescriptor {
+	sl := make([]*EnumDescriptor, 0, len(file.EnumType)+10)
+	// Top-level enums.
+	for i, enum := range file.EnumType {
+		sl = append(sl, newEnumDescriptor(enum, nil, file, i))
+	}
+	// Enums within messages. Enums within embedded messages appear in the outer-most message.
+	for _, nested := range descs {
+		for i, enum := range nested.EnumType {
+			sl = append(sl, newEnumDescriptor(enum, nested, file, i))
+		}
+	}
+	return sl
+}
+
+// Return a slice of all the top-level ExtensionDescriptors defined within this file.
+func wrapExtensions(file *FileDescriptor) []*ExtensionDescriptor {
+	var sl []*ExtensionDescriptor
+	for _, field := range file.Extension {
+		sl = append(sl, &ExtensionDescriptor{common{file}, field, nil})
+	}
+	return sl
+}
+
+// Return a slice of all the types that are publicly imported into this file.
+func wrapImported(file *FileDescriptor, g *Generator) (sl []*ImportedDescriptor) {
+	for _, index := range file.PublicDependency {
+		df := g.fileByName(file.Dependency[index])
+		for _, d := range df.desc {
+			if d.GetOptions().GetMapEntry() {
+				continue
+			}
+			sl = append(sl, &ImportedDescriptor{common{file}, d})
+		}
+		for _, e := range df.enum {
+			sl = append(sl, &ImportedDescriptor{common{file}, e})
+		}
+		for _, ext := range df.ext {
+			sl = append(sl, &ImportedDescriptor{common{file}, ext})
+		}
+	}
+	return
+}
+
+func extractComments(file *FileDescriptor) {
+	file.comments = make(map[string]*descriptor.SourceCodeInfo_Location)
+	for _, loc := range file.GetSourceCodeInfo().GetLocation() {
+		if loc.LeadingComments == nil {
+			continue
+		}
+		var p []string
+		for _, n := range loc.Path {
+			p = append(p, strconv.Itoa(int(n)))
+		}
+		file.comments[strings.Join(p, ",")] = loc
+	}
+}
+
+// BuildTypeNameMap builds the map from fully qualified type names to objects.
+// The key names for the map come from the input data, which puts a period at the beginning.
+// It should be called after SetPackageNames and before GenerateAllFiles.
+func (g *Generator) BuildTypeNameMap() {
+	g.typeNameToObject = make(map[string]Object)
+	for _, f := range g.allFiles {
+		// The names in this loop are defined by the proto world, not us, so the
+		// package name may be empty.  If so, the dotted package name of X will
+		// be ".X"; otherwise it will be ".pkg.X".
+		dottedPkg := "." + f.GetPackage()
+		if dottedPkg != "." {
+			dottedPkg += "."
+		}
+		for _, enum := range f.enum {
+			name := dottedPkg + dottedSlice(enum.TypeName())
+			g.typeNameToObject[name] = enum
+		}
+		for _, desc := range f.desc {
+			name := dottedPkg + dottedSlice(desc.TypeName())
+			g.typeNameToObject[name] = desc
+		}
+	}
+}
+
+// ObjectNamed, given a fully-qualified input type name as it appears in the input data,
+// returns the descriptor for the message or enum with that name.
+func (g *Generator) ObjectNamed(typeName string) Object {
+	o, ok := g.typeNameToObject[typeName]
+	if !ok {
+		g.Fail("can't find object with type", typeName)
+	}
+
+	// If the file of this object isn't a direct dependency of the current file,
+	// or in the current file, then this object has been publicly imported into
+	// a dependency of the current file.
+	// We should return the ImportedDescriptor object for it instead.
+	direct := *o.File().Name == *g.file.Name
+	if !direct {
+		for _, dep := range g.file.Dependency {
+			if *g.fileByName(dep).Name == *o.File().Name {
+				direct = true
+				break
+			}
+		}
+	}
+	if !direct {
+		found := false
+	Loop:
+		for _, dep := range g.file.Dependency {
+			df := g.fileByName(*g.fileByName(dep).Name)
+			for _, td := range df.imp {
+				if td.o == o {
+					// Found it!
+					o = td
+					found = true
+					break Loop
+				}
+			}
+		}
+		if !found {
+			log.Printf("protoc-gen-go: WARNING: failed finding publicly imported dependency for %v, used in %v", typeName, *g.file.Name)
+		}
+	}
+
+	return o
+}
+
+// AnnotatedAtoms is a list of atoms (as consumed by P) that records the file name and proto AST path from which they originated.
+type AnnotatedAtoms struct {
+	source string
+	path   string
+	atoms  []interface{}
+}
+
+// Annotate records the file name and proto AST path of a list of atoms
+// so that a later call to P can emit a link from each atom to its origin.
+func Annotate(file *FileDescriptor, path string, atoms ...interface{}) *AnnotatedAtoms {
+	return &AnnotatedAtoms{source: *file.Name, path: path, atoms: atoms}
+}
+
+// printAtom prints the (atomic, non-annotation) argument to the generated output.
+func (g *Generator) printAtom(v interface{}) {
+	switch v := v.(type) {
+	case string:
+		g.WriteString(v)
+	case *string:
+		g.WriteString(*v)
+	case bool:
+		fmt.Fprint(g, v)
+	case *bool:
+		fmt.Fprint(g, *v)
+	case int:
+		fmt.Fprint(g, v)
+	case *int32:
+		fmt.Fprint(g, *v)
+	case *int64:
+		fmt.Fprint(g, *v)
+	case float64:
+		fmt.Fprint(g, v)
+	case *float64:
+		fmt.Fprint(g, *v)
+	case GoPackageName:
+		g.WriteString(string(v))
+	case GoImportPath:
+		g.WriteString(strconv.Quote(string(v)))
+	default:
+		g.Fail(fmt.Sprintf("unknown type in printer: %T", v))
+	}
+}
+
+// P prints the arguments to the generated output.  It handles strings and int32s, plus
+// handling indirections because they may be *string, etc.  Any inputs of type AnnotatedAtoms may emit
+// annotations in a .meta file in addition to outputting the atoms themselves (if g.annotateCode
+// is true).
+func (g *Generator) P(str ...interface{}) {
+	if !g.writeOutput {
+		return
+	}
+	g.WriteString(g.indent)
+	for _, v := range str {
+		switch v := v.(type) {
+		case *AnnotatedAtoms:
+			begin := int32(g.Len())
+			for _, v := range v.atoms {
+				g.printAtom(v)
+			}
+			if g.annotateCode {
+				end := int32(g.Len())
+				var path []int32
+				for _, token := range strings.Split(v.path, ",") {
+					val, err := strconv.ParseInt(token, 10, 32)
+					if err != nil {
+						g.Fail("could not parse proto AST path: ", err.Error())
+					}
+					path = append(path, int32(val))
+				}
+				g.annotations = append(g.annotations, &descriptor.GeneratedCodeInfo_Annotation{
+					Path:       path,
+					SourceFile: &v.source,
+					Begin:      &begin,
+					End:        &end,
+				})
+			}
+		default:
+			g.printAtom(v)
+		}
+	}
+	g.WriteByte('\n')
+}
+
+// addInitf stores the given statement to be printed inside the file's init function.
+// The statement is given as a format specifier and arguments.
+func (g *Generator) addInitf(stmt string, a ...interface{}) {
+	g.init = append(g.init, fmt.Sprintf(stmt, a...))
+}
+
+// In Indents the output one tab stop.
+func (g *Generator) In() { g.indent += "\t" }
+
+// Out unindents the output one tab stop.
+func (g *Generator) Out() {
+	if len(g.indent) > 0 {
+		g.indent = g.indent[1:]
+	}
+}
+
+// GenerateAllFiles generates the output for all the files we're outputting.
+func (g *Generator) GenerateAllFiles() {
+	// Initialize the plugins
+	for _, p := range plugins {
+		p.Init(g)
+	}
+	// Generate the output. The generator runs for every file, even the files
+	// that we don't generate output for, so that we can collate the full list
+	// of exported symbols to support public imports.
+	genFileMap := make(map[*FileDescriptor]bool, len(g.genFiles))
+	for _, file := range g.genFiles {
+		genFileMap[file] = true
+	}
+	for _, file := range g.allFiles {
+		g.Reset()
+		g.annotations = nil
+		g.writeOutput = genFileMap[file]
+		g.generate(file)
+		if !g.writeOutput {
+			continue
+		}
+		fname := file.goFileName(g.pathType)
+		g.Response.File = append(g.Response.File, &plugin.CodeGeneratorResponse_File{
+			Name:    proto.String(fname),
+			Content: proto.String(g.String()),
+		})
+		if g.annotateCode {
+			// Store the generated code annotations in text, as the protoc plugin protocol requires that
+			// strings contain valid UTF-8.
+			g.Response.File = append(g.Response.File, &plugin.CodeGeneratorResponse_File{
+				Name:    proto.String(file.goFileName(g.pathType) + ".meta"),
+				Content: proto.String(proto.CompactTextString(&descriptor.GeneratedCodeInfo{Annotation: g.annotations})),
+			})
+		}
+	}
+}
+
+// Run all the plugins associated with the file.
+func (g *Generator) runPlugins(file *FileDescriptor) {
+	for _, p := range plugins {
+		p.Generate(file)
+	}
+}
+
+// Fill the response protocol buffer with the generated output for all the files we're
+// supposed to generate.
+func (g *Generator) generate(file *FileDescriptor) {
+	g.file = file
+	g.usedPackages = make(map[GoImportPath]bool)
+	g.packageNames = make(map[GoImportPath]GoPackageName)
+	g.usedPackageNames = make(map[GoPackageName]bool)
+	for name := range globalPackageNames {
+		g.usedPackageNames[name] = true
+	}
+
+	g.P("// This is a compile-time assertion to ensure that this generated file")
+	g.P("// is compatible with the proto package it is being compiled against.")
+	g.P("// A compilation error at this line likely means your copy of the")
+	g.P("// proto package needs to be updated.")
+	g.P("const _ = ", g.Pkg["proto"], ".ProtoPackageIsVersion", generatedCodeVersion, " // please upgrade the proto package")
+	g.P()
+
+	for _, td := range g.file.imp {
+		g.generateImported(td)
+	}
+	for _, enum := range g.file.enum {
+		g.generateEnum(enum)
+	}
+	for _, desc := range g.file.desc {
+		// Don't generate virtual messages for maps.
+		if desc.GetOptions().GetMapEntry() {
+			continue
+		}
+		g.generateMessage(desc)
+	}
+	for _, ext := range g.file.ext {
+		g.generateExtension(ext)
+	}
+	g.generateInitFunction()
+
+	// Run the plugins before the imports so we know which imports are necessary.
+	g.runPlugins(file)
+
+	g.generateFileDescriptor(file)
+
+	// Generate header and imports last, though they appear first in the output.
+	rem := g.Buffer
+	remAnno := g.annotations
+	g.Buffer = new(bytes.Buffer)
+	g.annotations = nil
+	g.generateHeader()
+	g.generateImports()
+	if !g.writeOutput {
+		return
+	}
+	// Adjust the offsets for annotations displaced by the header and imports.
+	for _, anno := range remAnno {
+		*anno.Begin += int32(g.Len())
+		*anno.End += int32(g.Len())
+		g.annotations = append(g.annotations, anno)
+	}
+	g.Write(rem.Bytes())
+
+	// Reformat generated code and patch annotation locations.
+	fset := token.NewFileSet()
+	original := g.Bytes()
+	if g.annotateCode {
+		// make a copy independent of g; we'll need it after Reset.
+		original = append([]byte(nil), original...)
+	}
+	ast, err := parser.ParseFile(fset, "", original, parser.ParseComments)
+	if err != nil {
+		// Print out the bad code with line numbers.
+		// This should never happen in practice, but it can while changing generated code,
+		// so consider this a debugging aid.
+		var src bytes.Buffer
+		s := bufio.NewScanner(bytes.NewReader(original))
+		for line := 1; s.Scan(); line++ {
+			fmt.Fprintf(&src, "%5d\t%s\n", line, s.Bytes())
+		}
+		g.Fail("bad Go source code was generated:", err.Error(), "\n"+src.String())
+	}
+	g.Reset()
+	err = (&printer.Config{Mode: printer.TabIndent | printer.UseSpaces, Tabwidth: 8}).Fprint(g, fset, ast)
+	if err != nil {
+		g.Fail("generated Go source code could not be reformatted:", err.Error())
+	}
+	if g.annotateCode {
+		m, err := remap.Compute(original, g.Bytes())
+		if err != nil {
+			g.Fail("formatted generated Go source code could not be mapped back to the original code:", err.Error())
+		}
+		for _, anno := range g.annotations {
+			new, ok := m.Find(int(*anno.Begin), int(*anno.End))
+			if !ok {
+				g.Fail("span in formatted generated Go source code could not be mapped back to the original code")
+			}
+			*anno.Begin = int32(new.Pos)
+			*anno.End = int32(new.End)
+		}
+	}
+}
+
+// Generate the header, including package definition
+func (g *Generator) generateHeader() {
+	g.P("// Code generated by protoc-gen-go. DO NOT EDIT.")
+	if g.file.GetOptions().GetDeprecated() {
+		g.P("// ", g.file.Name, " is a deprecated file.")
+	} else {
+		g.P("// source: ", g.file.Name)
+	}
+	g.P()
+
+	importPath, _, _ := g.file.goPackageOption()
+	if importPath == "" {
+		g.P("package ", g.file.packageName)
+	} else {
+		g.P("package ", g.file.packageName, " // import ", GoImportPath(g.ImportPrefix)+importPath)
+	}
+	g.P()
+
+	if loc, ok := g.file.comments[strconv.Itoa(packagePath)]; ok {
+		g.P("/*")
+		// not using g.PrintComments because this is a /* */ comment block.
+		text := strings.TrimSuffix(loc.GetLeadingComments(), "\n")
+		for _, line := range strings.Split(text, "\n") {
+			line = strings.TrimPrefix(line, " ")
+			// ensure we don't escape from the block comment
+			line = strings.Replace(line, "*/", "* /", -1)
+			g.P(line)
+		}
+		g.P("*/")
+		g.P()
+	}
+}
+
+// deprecationComment is the standard comment added to deprecated
+// messages, fields, enums, and enum values.
+var deprecationComment = "// Deprecated: Do not use."
+
+// PrintComments prints any comments from the source .proto file.
+// The path is a comma-separated list of integers.
+// It returns an indication of whether any comments were printed.
+// See descriptor.proto for its format.
+func (g *Generator) PrintComments(path string) bool {
+	if !g.writeOutput {
+		return false
+	}
+	if c, ok := g.makeComments(path); ok {
+		g.P(c)
+		return true
+	}
+	return false
+}
+
+// makeComments generates the comment string for the field, no "\n" at the end
+func (g *Generator) makeComments(path string) (string, bool) {
+	loc, ok := g.file.comments[path]
+	if !ok {
+		return "", false
+	}
+	w := new(bytes.Buffer)
+	nl := ""
+	for _, line := range strings.Split(strings.TrimSuffix(loc.GetLeadingComments(), "\n"), "\n") {
+		fmt.Fprintf(w, "%s// %s", nl, strings.TrimPrefix(line, " "))
+		nl = "\n"
+	}
+	return w.String(), true
+}
+
+func (g *Generator) fileByName(filename string) *FileDescriptor {
+	return g.allFilesByName[filename]
+}
+
+// weak returns whether the ith import of the current file is a weak import.
+func (g *Generator) weak(i int32) bool {
+	for _, j := range g.file.WeakDependency {
+		if j == i {
+			return true
+		}
+	}
+	return false
+}
+
+// Generate the imports
+func (g *Generator) generateImports() {
+	// We almost always need a proto import.  Rather than computing when we
+	// do, which is tricky when there's a plugin, just import it and
+	// reference it later. The same argument applies to the fmt and math packages.
+	g.P("import "+g.Pkg["proto"]+" ", GoImportPath(g.ImportPrefix)+"github.com/golang/protobuf/proto")
+	g.P("import " + g.Pkg["fmt"] + ` "fmt"`)
+	g.P("import " + g.Pkg["math"] + ` "math"`)
+	var (
+		imports       = make(map[GoImportPath]bool)
+		strongImports = make(map[GoImportPath]bool)
+		importPaths   []string
+	)
+	for i, s := range g.file.Dependency {
+		fd := g.fileByName(s)
+		importPath := fd.importPath
+		// Do not import our own package.
+		if importPath == g.file.importPath {
+			continue
+		}
+		if !imports[importPath] {
+			importPaths = append(importPaths, string(importPath))
+		}
+		imports[importPath] = true
+		if !g.weak(int32(i)) {
+			strongImports[importPath] = true
+		}
+	}
+	sort.Strings(importPaths)
+	for i := range importPaths {
+		importPath := GoImportPath(importPaths[i])
+		packageName := g.GoPackageName(importPath)
+		fullPath := GoImportPath(g.ImportPrefix) + importPath
+		// Skip weak imports.
+		if !strongImports[importPath] {
+			g.P("// skipping weak import ", packageName, " ", fullPath)
+			continue
+		}
+		// We need to import all the dependencies, even if we don't reference them,
+		// because other code and tools depend on having the full transitive closure
+		// of protocol buffer types in the binary.
+		if _, ok := g.usedPackages[importPath]; !ok {
+			packageName = "_"
+		}
+		g.P("import ", packageName, " ", fullPath)
+	}
+	g.P()
+	// TODO: may need to worry about uniqueness across plugins
+	for _, p := range plugins {
+		p.GenerateImports(g.file)
+		g.P()
+	}
+	g.P("// Reference imports to suppress errors if they are not otherwise used.")
+	g.P("var _ = ", g.Pkg["proto"], ".Marshal")
+	g.P("var _ = ", g.Pkg["fmt"], ".Errorf")
+	g.P("var _ = ", g.Pkg["math"], ".Inf")
+	g.P()
+}
+
+func (g *Generator) generateImported(id *ImportedDescriptor) {
+	tn := id.TypeName()
+	sn := tn[len(tn)-1]
+	df := id.o.File()
+	filename := *df.Name
+	if df.importPath == g.file.importPath {
+		// Don't generate type aliases for files in the same Go package as this one.
+		g.P("// Ignoring public import of ", sn, " from ", filename)
+		g.P()
+		return
+	}
+	if !supportTypeAliases {
+		g.Fail(fmt.Sprintf("%s: public imports require at least go1.9", filename))
+	}
+	g.P("// ", sn, " from public import ", filename)
+	g.usedPackages[df.importPath] = true
+
+	for _, sym := range df.exported[id.o] {
+		sym.GenerateAlias(g, g.GoPackageName(df.importPath))
+	}
+
+	g.P()
+}
+
+// Generate the enum definitions for this EnumDescriptor.
+func (g *Generator) generateEnum(enum *EnumDescriptor) {
+	// The full type name
+	typeName := enum.TypeName()
+	// The full type name, CamelCased.
+	ccTypeName := CamelCaseSlice(typeName)
+	ccPrefix := enum.prefix()
+
+	deprecatedEnum := ""
+	if enum.GetOptions().GetDeprecated() {
+		deprecatedEnum = deprecationComment
+	}
+	g.PrintComments(enum.path)
+	g.P("type ", Annotate(enum.file, enum.path, ccTypeName), " int32", deprecatedEnum)
+	g.file.addExport(enum, enumSymbol{ccTypeName, enum.proto3()})
+	g.P("const (")
+	for i, e := range enum.Value {
+		etorPath := fmt.Sprintf("%s,%d,%d", enum.path, enumValuePath, i)
+		g.PrintComments(etorPath)
+
+		deprecatedValue := ""
+		if e.GetOptions().GetDeprecated() {
+			deprecatedValue = deprecationComment
+		}
+
+		name := ccPrefix + *e.Name
+		g.P(Annotate(enum.file, etorPath, name), " ", ccTypeName, " = ", e.Number, " ", deprecatedValue)
+		g.file.addExport(enum, constOrVarSymbol{name, "const", ccTypeName})
+	}
+	g.P(")")
+	g.P("var ", ccTypeName, "_name = map[int32]string{")
+	generated := make(map[int32]bool) // avoid duplicate values
+	for _, e := range enum.Value {
+		duplicate := ""
+		if _, present := generated[*e.Number]; present {
+			duplicate = "// Duplicate value: "
+		}
+		g.P(duplicate, e.Number, ": ", strconv.Quote(*e.Name), ",")
+		generated[*e.Number] = true
+	}
+	g.P("}")
+	g.P("var ", ccTypeName, "_value = map[string]int32{")
+	for _, e := range enum.Value {
+		g.P(strconv.Quote(*e.Name), ": ", e.Number, ",")
+	}
+	g.P("}")
+
+	if !enum.proto3() {
+		g.P("func (x ", ccTypeName, ") Enum() *", ccTypeName, " {")
+		g.P("p := new(", ccTypeName, ")")
+		g.P("*p = x")
+		g.P("return p")
+		g.P("}")
+	}
+
+	g.P("func (x ", ccTypeName, ") String() string {")
+	g.P("return ", g.Pkg["proto"], ".EnumName(", ccTypeName, "_name, int32(x))")
+	g.P("}")
+
+	if !enum.proto3() {
+		g.P("func (x *", ccTypeName, ") UnmarshalJSON(data []byte) error {")
+		g.P("value, err := ", g.Pkg["proto"], ".UnmarshalJSONEnum(", ccTypeName, `_value, data, "`, ccTypeName, `")`)
+		g.P("if err != nil {")
+		g.P("return err")
+		g.P("}")
+		g.P("*x = ", ccTypeName, "(value)")
+		g.P("return nil")
+		g.P("}")
+	}
+
+	var indexes []string
+	for m := enum.parent; m != nil; m = m.parent {
+		// XXX: skip groups?
+		indexes = append([]string{strconv.Itoa(m.index)}, indexes...)
+	}
+	indexes = append(indexes, strconv.Itoa(enum.index))
+	g.P("func (", ccTypeName, ") EnumDescriptor() ([]byte, []int) {")
+	g.P("return ", g.file.VarName(), ", []int{", strings.Join(indexes, ", "), "}")
+	g.P("}")
+	if enum.file.GetPackage() == "google.protobuf" && enum.GetName() == "NullValue" {
+		g.P("func (", ccTypeName, `) XXX_WellKnownType() string { return "`, enum.GetName(), `" }`)
+	}
+
+	g.P()
+}
+
+// The tag is a string like "varint,2,opt,name=fieldname,def=7" that
+// identifies details of the field for the protocol buffer marshaling and unmarshaling
+// code.  The fields are:
+//	wire encoding
+//	protocol tag number
+//	opt,req,rep for optional, required, or repeated
+//	packed whether the encoding is "packed" (optional; repeated primitives only)
+//	name= the original declared name
+//	enum= the name of the enum type if it is an enum-typed field.
+//	proto3 if this field is in a proto3 message
+//	def= string representation of the default value, if any.
+// The default value must be in a representation that can be used at run-time
+// to generate the default value. Thus bools become 0 and 1, for instance.
+func (g *Generator) goTag(message *Descriptor, field *descriptor.FieldDescriptorProto, wiretype string) string {
+	optrepreq := ""
+	switch {
+	case isOptional(field):
+		optrepreq = "opt"
+	case isRequired(field):
+		optrepreq = "req"
+	case isRepeated(field):
+		optrepreq = "rep"
+	}
+	var defaultValue string
+	if dv := field.DefaultValue; dv != nil { // set means an explicit default
+		defaultValue = *dv
+		// Some types need tweaking.
+		switch *field.Type {
+		case descriptor.FieldDescriptorProto_TYPE_BOOL:
+			if defaultValue == "true" {
+				defaultValue = "1"
+			} else {
+				defaultValue = "0"
+			}
+		case descriptor.FieldDescriptorProto_TYPE_STRING,
+			descriptor.FieldDescriptorProto_TYPE_BYTES:
+			// Nothing to do. Quoting is done for the whole tag.
+		case descriptor.FieldDescriptorProto_TYPE_ENUM:
+			// For enums we need to provide the integer constant.
+			obj := g.ObjectNamed(field.GetTypeName())
+			if id, ok := obj.(*ImportedDescriptor); ok {
+				// It is an enum that was publicly imported.
+				// We need the underlying type.
+				obj = id.o
+			}
+			enum, ok := obj.(*EnumDescriptor)
+			if !ok {
+				log.Printf("obj is a %T", obj)
+				if id, ok := obj.(*ImportedDescriptor); ok {
+					log.Printf("id.o is a %T", id.o)
+				}
+				g.Fail("unknown enum type", CamelCaseSlice(obj.TypeName()))
+			}
+			defaultValue = enum.integerValueAsString(defaultValue)
+		}
+		defaultValue = ",def=" + defaultValue
+	}
+	enum := ""
+	if *field.Type == descriptor.FieldDescriptorProto_TYPE_ENUM {
+		// We avoid using obj.GoPackageName(), because we want to use the
+		// original (proto-world) package name.
+		obj := g.ObjectNamed(field.GetTypeName())
+		if id, ok := obj.(*ImportedDescriptor); ok {
+			obj = id.o
+		}
+		enum = ",enum="
+		if pkg := obj.File().GetPackage(); pkg != "" {
+			enum += pkg + "."
+		}
+		enum += CamelCaseSlice(obj.TypeName())
+	}
+	packed := ""
+	if (field.Options != nil && field.Options.GetPacked()) ||
+		// Per https://developers.google.com/protocol-buffers/docs/proto3#simple:
+		// "In proto3, repeated fields of scalar numeric types use packed encoding by default."
+		(message.proto3() && (field.Options == nil || field.Options.Packed == nil) &&
+			isRepeated(field) && isScalar(field)) {
+		packed = ",packed"
+	}
+	fieldName := field.GetName()
+	name := fieldName
+	if *field.Type == descriptor.FieldDescriptorProto_TYPE_GROUP {
+		// We must use the type name for groups instead of
+		// the field name to preserve capitalization.
+		// type_name in FieldDescriptorProto is fully-qualified,
+		// but we only want the local part.
+		name = *field.TypeName
+		if i := strings.LastIndex(name, "."); i >= 0 {
+			name = name[i+1:]
+		}
+	}
+	if json := field.GetJsonName(); json != "" && json != name {
+		// TODO: escaping might be needed, in which case
+		// perhaps this should be in its own "json" tag.
+		name += ",json=" + json
+	}
+	name = ",name=" + name
+	if message.proto3() {
+		name += ",proto3"
+	}
+	oneof := ""
+	if field.OneofIndex != nil {
+		oneof = ",oneof"
+	}
+	return strconv.Quote(fmt.Sprintf("%s,%d,%s%s%s%s%s%s",
+		wiretype,
+		field.GetNumber(),
+		optrepreq,
+		packed,
+		name,
+		enum,
+		oneof,
+		defaultValue))
+}
+
+func needsStar(typ descriptor.FieldDescriptorProto_Type) bool {
+	switch typ {
+	case descriptor.FieldDescriptorProto_TYPE_GROUP:
+		return false
+	case descriptor.FieldDescriptorProto_TYPE_MESSAGE:
+		return false
+	case descriptor.FieldDescriptorProto_TYPE_BYTES:
+		return false
+	}
+	return true
+}
+
+// TypeName is the printed name appropriate for an item. If the object is in the current file,
+// TypeName drops the package name and underscores the rest.
+// Otherwise the object is from another package; and the result is the underscored
+// package name followed by the item name.
+// The result always has an initial capital.
+func (g *Generator) TypeName(obj Object) string {
+	return g.DefaultPackageName(obj) + CamelCaseSlice(obj.TypeName())
+}
+
+// GoType returns a string representing the type name, and the wire type
+func (g *Generator) GoType(message *Descriptor, field *descriptor.FieldDescriptorProto) (typ string, wire string) {
+	// TODO: Options.
+	switch *field.Type {
+	case descriptor.FieldDescriptorProto_TYPE_DOUBLE:
+		typ, wire = "float64", "fixed64"
+	case descriptor.FieldDescriptorProto_TYPE_FLOAT:
+		typ, wire = "float32", "fixed32"
+	case descriptor.FieldDescriptorProto_TYPE_INT64:
+		typ, wire = "int64", "varint"
+	case descriptor.FieldDescriptorProto_TYPE_UINT64:
+		typ, wire = "uint64", "varint"
+	case descriptor.FieldDescriptorProto_TYPE_INT32:
+		typ, wire = "int32", "varint"
+	case descriptor.FieldDescriptorProto_TYPE_UINT32:
+		typ, wire = "uint32", "varint"
+	case descriptor.FieldDescriptorProto_TYPE_FIXED64:
+		typ, wire = "uint64", "fixed64"
+	case descriptor.FieldDescriptorProto_TYPE_FIXED32:
+		typ, wire = "uint32", "fixed32"
+	case descriptor.FieldDescriptorProto_TYPE_BOOL:
+		typ, wire = "bool", "varint"
+	case descriptor.FieldDescriptorProto_TYPE_STRING:
+		typ, wire = "string", "bytes"
+	case descriptor.FieldDescriptorProto_TYPE_GROUP:
+		desc := g.ObjectNamed(field.GetTypeName())
+		typ, wire = "*"+g.TypeName(desc), "group"
+	case descriptor.FieldDescriptorProto_TYPE_MESSAGE:
+		desc := g.ObjectNamed(field.GetTypeName())
+		typ, wire = "*"+g.TypeName(desc), "bytes"
+	case descriptor.FieldDescriptorProto_TYPE_BYTES:
+		typ, wire = "[]byte", "bytes"
+	case descriptor.FieldDescriptorProto_TYPE_ENUM:
+		desc := g.ObjectNamed(field.GetTypeName())
+		typ, wire = g.TypeName(desc), "varint"
+	case descriptor.FieldDescriptorProto_TYPE_SFIXED32:
+		typ, wire = "int32", "fixed32"
+	case descriptor.FieldDescriptorProto_TYPE_SFIXED64:
+		typ, wire = "int64", "fixed64"
+	case descriptor.FieldDescriptorProto_TYPE_SINT32:
+		typ, wire = "int32", "zigzag32"
+	case descriptor.FieldDescriptorProto_TYPE_SINT64:
+		typ, wire = "int64", "zigzag64"
+	default:
+		g.Fail("unknown type for", field.GetName())
+	}
+	if isRepeated(field) {
+		typ = "[]" + typ
+	} else if message != nil && message.proto3() {
+		return
+	} else if field.OneofIndex != nil && message != nil {
+		return
+	} else if needsStar(*field.Type) {
+		typ = "*" + typ
+	}
+	return
+}
+
+func (g *Generator) RecordTypeUse(t string) {
+	if _, ok := g.typeNameToObject[t]; ok {
+		// Call ObjectNamed to get the true object to record the use.
+		obj := g.ObjectNamed(t)
+		g.usedPackages[obj.GoImportPath()] = true
+	}
+}
+
+// Method names that may be generated.  Fields with these names get an
+// underscore appended. Any change to this set is a potential incompatible
+// API change because it changes generated field names.
+var methodNames = [...]string{
+	"Reset",
+	"String",
+	"ProtoMessage",
+	"Marshal",
+	"Unmarshal",
+	"ExtensionRangeArray",
+	"ExtensionMap",
+	"Descriptor",
+}
+
+// Names of messages in the `google.protobuf` package for which
+// we will generate XXX_WellKnownType methods.
+var wellKnownTypes = map[string]bool{
+	"Any":       true,
+	"Duration":  true,
+	"Empty":     true,
+	"Struct":    true,
+	"Timestamp": true,
+
+	"Value":       true,
+	"ListValue":   true,
+	"DoubleValue": true,
+	"FloatValue":  true,
+	"Int64Value":  true,
+	"UInt64Value": true,
+	"Int32Value":  true,
+	"UInt32Value": true,
+	"BoolValue":   true,
+	"StringValue": true,
+	"BytesValue":  true,
+}
+
+// getterDefault finds the default value for the field to return from a getter,
+// regardless of if it's a built in default or explicit from the source. Returns e.g. "nil", `""`, "Default_MessageType_FieldName"
+func (g *Generator) getterDefault(field *descriptor.FieldDescriptorProto, goMessageType string) string {
+	if isRepeated(field) {
+		return "nil"
+	}
+	if def := field.GetDefaultValue(); def != "" {
+		defaultConstant := g.defaultConstantName(goMessageType, field.GetName())
+		if *field.Type != descriptor.FieldDescriptorProto_TYPE_BYTES {
+			return defaultConstant
+		}
+		return "append([]byte(nil), " + defaultConstant + "...)"
+	}
+	switch *field.Type {
+	case descriptor.FieldDescriptorProto_TYPE_BOOL:
+		return "false"
+	case descriptor.FieldDescriptorProto_TYPE_STRING:
+		return `""`
+	case descriptor.FieldDescriptorProto_TYPE_GROUP, descriptor.FieldDescriptorProto_TYPE_MESSAGE, descriptor.FieldDescriptorProto_TYPE_BYTES:
+		return "nil"
+	case descriptor.FieldDescriptorProto_TYPE_ENUM:
+		obj := g.ObjectNamed(field.GetTypeName())
+		var enum *EnumDescriptor
+		if id, ok := obj.(*ImportedDescriptor); ok {
+			// The enum type has been publicly imported.
+			enum, _ = id.o.(*EnumDescriptor)
+		} else {
+			enum, _ = obj.(*EnumDescriptor)
+		}
+		if enum == nil {
+			log.Printf("don't know how to generate getter for %s", field.GetName())
+			return "nil"
+		}
+		if len(enum.Value) == 0 {
+			return "0 // empty enum"
+		}
+		first := enum.Value[0].GetName()
+		return g.DefaultPackageName(obj) + enum.prefix() + first
+	default:
+		return "0"
+	}
+}
+
+// defaultConstantName builds the name of the default constant from the message
+// type name and the untouched field name, e.g. "Default_MessageType_FieldName"
+func (g *Generator) defaultConstantName(goMessageType, protoFieldName string) string {
+	return "Default_" + goMessageType + "_" + CamelCase(protoFieldName)
+}
+
+// The different types of fields in a message and how to actually print them
+// Most of the logic for generateMessage is in the methods of these types.
+//
+// Note that the content of the field is irrelevant, a simpleField can contain
+// anything from a scalar to a group (which is just a message).
+//
+// Extension fields (and message sets) are however handled separately.
+//
+// simpleField - a field that is neiter weak nor oneof, possibly repeated
+// oneofField - field containing list of subfields:
+// - oneofSubField - a field within the oneof
+
+// msgCtx contais the context for the generator functions.
+type msgCtx struct {
+	goName  string      // Go struct name of the message, e.g. MessageName
+	message *Descriptor // The descriptor for the message
+}
+
+// fieldCommon contains data common to all types of fields.
+type fieldCommon struct {
+	goName     string // Go name of field, e.g. "FieldName" or "Descriptor_"
+	protoName  string // Name of field in proto language, e.g. "field_name" or "descriptor"
+	getterName string // Name of the getter, e.g. "GetFieldName" or "GetDescriptor_"
+	goType     string // The Go type as a string, e.g. "*int32" or "*OtherMessage"
+	tags       string // The tag string/annotation for the type, e.g. `protobuf:"varint,8,opt,name=region_id,json=regionId"`
+	fullPath   string // The full path of the field as used by Annotate etc, e.g. "4,0,2,0"
+}
+
+// getProtoName gets the proto name of a field, e.g. "field_name" or "descriptor".
+func (f *fieldCommon) getProtoName() string {
+	return f.protoName
+}
+
+// getGoType returns the go type of the field  as a string, e.g. "*int32".
+func (f *fieldCommon) getGoType() string {
+	return f.goType
+}
+
+// simpleField is not weak, not a oneof, not an extension. Can be required, optional or repeated.
+type simpleField struct {
+	fieldCommon
+	protoTypeName string                               // Proto type name, empty if primitive, e.g. ".google.protobuf.Duration"
+	protoType     descriptor.FieldDescriptorProto_Type // Actual type enum value, e.g. descriptor.FieldDescriptorProto_TYPE_FIXED64
+	deprecated    string                               // Deprecation comment, if any, e.g. "// Deprecated: Do not use."
+	getterDef     string                               // Default for getters, e.g. "nil", `""` or "Default_MessageType_FieldName"
+	protoDef      string                               // Default value as defined in the proto file, e.g "yoshi" or "5"
+	comment       string                               // The full comment for the field, e.g. "// Useful information"
+}
+
+// decl prints the declaration of the field in the struct (if any).
+func (f *simpleField) decl(g *Generator, mc *msgCtx) {
+	g.P(f.comment, Annotate(mc.message.file, f.fullPath, f.goName), "\t", f.goType, "\t`", f.tags, "`", f.deprecated)
+}
+
+// getter prints the getter for the field.
+func (f *simpleField) getter(g *Generator, mc *msgCtx) {
+	star := ""
+	tname := f.goType
+	if needsStar(f.protoType) && tname[0] == '*' {
+		tname = tname[1:]
+		star = "*"
+	}
+	if f.deprecated != "" {
+		g.P(f.deprecated)
+	}
+	g.P("func (m *", mc.goName, ") ", Annotate(mc.message.file, f.fullPath, f.getterName), "() "+tname+" {")
+	if f.getterDef == "nil" { // Simpler getter
+		g.P("if m != nil {")
+		g.P("return m." + f.goName)
+		g.P("}")
+		g.P("return nil")
+		g.P("}")
+		g.P()
+		return
+	}
+	if mc.message.proto3() {
+		g.P("if m != nil {")
+	} else {
+		g.P("if m != nil && m." + f.goName + " != nil {")
+	}
+	g.P("return " + star + "m." + f.goName)
+	g.P("}")
+	g.P("return ", f.getterDef)
+	g.P("}")
+	g.P()
+}
+
+// setter prints the setter method of the field.
+func (f *simpleField) setter(g *Generator, mc *msgCtx) {
+	// No setter for regular fields yet
+}
+
+// getProtoDef returns the default value explicitly stated in the proto file, e.g "yoshi" or "5".
+func (f *simpleField) getProtoDef() string {
+	return f.protoDef
+}
+
+// getProtoTypeName returns the protobuf type name for the field as returned by field.GetTypeName(), e.g. ".google.protobuf.Duration".
+func (f *simpleField) getProtoTypeName() string {
+	return f.protoTypeName
+}
+
+// getProtoType returns the *field.Type value, e.g. descriptor.FieldDescriptorProto_TYPE_FIXED64.
+func (f *simpleField) getProtoType() descriptor.FieldDescriptorProto_Type {
+	return f.protoType
+}
+
+// oneofSubFields are kept slize held by each oneofField. They do not appear in the top level slize of fields for the message.
+type oneofSubField struct {
+	fieldCommon
+	protoTypeName string                               // Proto type name, empty if primitive, e.g. ".google.protobuf.Duration"
+	protoType     descriptor.FieldDescriptorProto_Type // Actual type enum value, e.g. descriptor.FieldDescriptorProto_TYPE_FIXED64
+	oneofTypeName string                               // Type name of the enclosing struct, e.g. "MessageName_FieldName"
+	fieldNumber   int                                  // Actual field number, as defined in proto, e.g. 12
+	getterDef     string                               // Default for getters, e.g. "nil", `""` or "Default_MessageType_FieldName"
+	protoDef      string                               // Default value as defined in the proto file, e.g "yoshi" or "5"
+}
+
+// wireTypeName returns a textual wire type, needed for oneof sub fields in generated code.
+func (f *oneofSubField) wireTypeName() string {
+	switch f.protoType {
+	case descriptor.FieldDescriptorProto_TYPE_FIXED64,
+		descriptor.FieldDescriptorProto_TYPE_SFIXED64,
+		descriptor.FieldDescriptorProto_TYPE_DOUBLE:
+		return "WireFixed64"
+	case descriptor.FieldDescriptorProto_TYPE_FIXED32,
+		descriptor.FieldDescriptorProto_TYPE_SFIXED32,
+		descriptor.FieldDescriptorProto_TYPE_FLOAT:
+		return "WireFixed32"
+	case descriptor.FieldDescriptorProto_TYPE_GROUP:
+		return "WireStartGroup"
+	case descriptor.FieldDescriptorProto_TYPE_MESSAGE,
+		descriptor.FieldDescriptorProto_TYPE_STRING,
+		descriptor.FieldDescriptorProto_TYPE_BYTES:
+		return "WireBytes"
+	default: // All others are Varints
+		return "WireVarint"
+	}
+}
+
+// typedNil prints a nil casted to the pointer to this field.
+// - for XXX_OneofFuncs
+func (f *oneofSubField) typedNil(g *Generator) {
+	g.P("(*", f.oneofTypeName, ")(nil),")
+}
+
+// marshalCase prints the case matching this oneof subfield in the marshalling code.
+func (f *oneofSubField) marshalCase(g *Generator) {
+	g.P("case *", f.oneofTypeName, ":")
+	wire := f.wireTypeName()
+	var pre, post string
+	val := "x." + f.goName // overridden for TYPE_BOOL
+	switch f.protoType {
+	case descriptor.FieldDescriptorProto_TYPE_DOUBLE:
+		pre = "b.EncodeFixed64(" + g.Pkg["math"] + ".Float64bits("
+		post = "))"
+	case descriptor.FieldDescriptorProto_TYPE_FLOAT:
+		pre = "b.EncodeFixed32(uint64(" + g.Pkg["math"] + ".Float32bits("
+		post = ")))"
+	case descriptor.FieldDescriptorProto_TYPE_INT64, descriptor.FieldDescriptorProto_TYPE_UINT64:
+		pre, post = "b.EncodeVarint(uint64(", "))"
+	case descriptor.FieldDescriptorProto_TYPE_INT32, descriptor.FieldDescriptorProto_TYPE_UINT32, descriptor.FieldDescriptorProto_TYPE_ENUM:
+		pre, post = "b.EncodeVarint(uint64(", "))"
+	case descriptor.FieldDescriptorProto_TYPE_FIXED64, descriptor.FieldDescriptorProto_TYPE_SFIXED64:
+		pre, post = "b.EncodeFixed64(uint64(", "))"
+	case descriptor.FieldDescriptorProto_TYPE_FIXED32, descriptor.FieldDescriptorProto_TYPE_SFIXED32:
+		pre, post = "b.EncodeFixed32(uint64(", "))"
+	case descriptor.FieldDescriptorProto_TYPE_BOOL:
+		g.P("t := uint64(0)")
+		g.P("if ", val, " { t = 1 }")
+		val = "t"
+		pre, post = "b.EncodeVarint(", ")"
+	case descriptor.FieldDescriptorProto_TYPE_STRING:
+		pre, post = "b.EncodeStringBytes(", ")"
+	case descriptor.FieldDescriptorProto_TYPE_GROUP:
+		pre, post = "b.Marshal(", ")"
+	case descriptor.FieldDescriptorProto_TYPE_MESSAGE:
+		pre, post = "b.EncodeMessage(", ")"
+	case descriptor.FieldDescriptorProto_TYPE_BYTES:
+		pre, post = "b.EncodeRawBytes(", ")"
+	case descriptor.FieldDescriptorProto_TYPE_SINT32:
+		pre, post = "b.EncodeZigzag32(uint64(", "))"
+	case descriptor.FieldDescriptorProto_TYPE_SINT64:
+		pre, post = "b.EncodeZigzag64(uint64(", "))"
+	default:
+		g.Fail("unhandled oneof field type ", f.protoType.String())
+	}
+	g.P("b.EncodeVarint(", f.fieldNumber, "<<3|", g.Pkg["proto"], ".", wire, ")")
+	if t := f.protoType; t != descriptor.FieldDescriptorProto_TYPE_GROUP && t != descriptor.FieldDescriptorProto_TYPE_MESSAGE {
+		g.P(pre, val, post)
+	} else {
+		g.P("if err := ", pre, val, post, "; err != nil {")
+		g.P("return err")
+		g.P("}")
+	}
+	if f.protoType == descriptor.FieldDescriptorProto_TYPE_GROUP {
+		g.P("b.EncodeVarint(", f.fieldNumber, "<<3|", g.Pkg["proto"], ".WireEndGroup)")
+	}
+}
+
+// unmarshalCase prints the case matching this oneof subfield in the unmarshalling code.
+func (f *oneofSubField) unmarshalCase(g *Generator, origOneofName string, oneofName string) {
+	g.P("case ", f.fieldNumber, ": // ", origOneofName, ".", f.getProtoName())
+	g.P("if wire != ", g.Pkg["proto"], ".", f.wireTypeName(), " {")
+	g.P("return true, ", g.Pkg["proto"], ".ErrInternalBadWireType")
+	g.P("}")
+	lhs := "x, err" // overridden for TYPE_MESSAGE and TYPE_GROUP
+	var dec, cast, cast2 string
+	switch f.protoType {
+	case descriptor.FieldDescriptorProto_TYPE_DOUBLE:
+		dec, cast = "b.DecodeFixed64()", g.Pkg["math"]+".Float64frombits"
+	case descriptor.FieldDescriptorProto_TYPE_FLOAT:
+		dec, cast, cast2 = "b.DecodeFixed32()", "uint32", g.Pkg["math"]+".Float32frombits"
+	case descriptor.FieldDescriptorProto_TYPE_INT64:
+		dec, cast = "b.DecodeVarint()", "int64"
+	case descriptor.FieldDescriptorProto_TYPE_UINT64:
+		dec = "b.DecodeVarint()"
+	case descriptor.FieldDescriptorProto_TYPE_INT32:
+		dec, cast = "b.DecodeVarint()", "int32"
+	case descriptor.FieldDescriptorProto_TYPE_FIXED64:
+		dec = "b.DecodeFixed64()"
+	case descriptor.FieldDescriptorProto_TYPE_FIXED32:
+		dec, cast = "b.DecodeFixed32()", "uint32"
+	case descriptor.FieldDescriptorProto_TYPE_BOOL:
+		dec = "b.DecodeVarint()"
+		// handled specially below
+	case descriptor.FieldDescriptorProto_TYPE_STRING:
+		dec = "b.DecodeStringBytes()"
+	case descriptor.FieldDescriptorProto_TYPE_GROUP:
+		g.P("msg := new(", f.goType[1:], ")") // drop star
+		lhs = "err"
+		dec = "b.DecodeGroup(msg)"
+		// handled specially below
+	case descriptor.FieldDescriptorProto_TYPE_MESSAGE:
+		g.P("msg := new(", f.goType[1:], ")") // drop star
+		lhs = "err"
+		dec = "b.DecodeMessage(msg)"
+		// handled specially below
+	case descriptor.FieldDescriptorProto_TYPE_BYTES:
+		dec = "b.DecodeRawBytes(true)"
+	case descriptor.FieldDescriptorProto_TYPE_UINT32:
+		dec, cast = "b.DecodeVarint()", "uint32"
+	case descriptor.FieldDescriptorProto_TYPE_ENUM:
+		dec, cast = "b.DecodeVarint()", f.goType
+	case descriptor.FieldDescriptorProto_TYPE_SFIXED32:
+		dec, cast = "b.DecodeFixed32()", "int32"
+	case descriptor.FieldDescriptorProto_TYPE_SFIXED64:
+		dec, cast = "b.DecodeFixed64()", "int64"
+	case descriptor.FieldDescriptorProto_TYPE_SINT32:
+		dec, cast = "b.DecodeZigzag32()", "int32"
+	case descriptor.FieldDescriptorProto_TYPE_SINT64:
+		dec, cast = "b.DecodeZigzag64()", "int64"
+	default:
+		g.Fail("unhandled oneof field type ", f.protoType.String())
+	}
+	g.P(lhs, " := ", dec)
+	val := "x"
+	if cast != "" {
+		val = cast + "(" + val + ")"
+	}
+	if cast2 != "" {
+		val = cast2 + "(" + val + ")"
+	}
+	switch f.protoType {
+	case descriptor.FieldDescriptorProto_TYPE_BOOL:
+		val += " != 0"
+	case descriptor.FieldDescriptorProto_TYPE_GROUP,
+		descriptor.FieldDescriptorProto_TYPE_MESSAGE:
+		val = "msg"
+	}
+	g.P("m.", oneofName, " = &", f.oneofTypeName, "{", val, "}")
+	g.P("return true, err")
+}
+
+// sizerCase prints the case matching this oneof subfield in the sizer code.
+func (f *oneofSubField) sizerCase(g *Generator) {
+	g.P("case *", f.oneofTypeName, ":")
+	val := "x." + f.goName
+	var varint, fixed string
+	switch f.protoType {
+	case descriptor.FieldDescriptorProto_TYPE_DOUBLE:
+		fixed = "8"
+	case descriptor.FieldDescriptorProto_TYPE_FLOAT:
+		fixed = "4"
+	case descriptor.FieldDescriptorProto_TYPE_INT64, descriptor.FieldDescriptorProto_TYPE_UINT64, descriptor.FieldDescriptorProto_TYPE_INT32, descriptor.FieldDescriptorProto_TYPE_UINT32, descriptor.FieldDescriptorProto_TYPE_ENUM:
+		varint = val
+	case descriptor.FieldDescriptorProto_TYPE_FIXED64, descriptor.FieldDescriptorProto_TYPE_SFIXED64:
+		fixed = "8"
+	case descriptor.FieldDescriptorProto_TYPE_FIXED32, descriptor.FieldDescriptorProto_TYPE_SFIXED32:
+		fixed = "4"
+	case descriptor.FieldDescriptorProto_TYPE_BOOL:
+		fixed = "1"
+	case descriptor.FieldDescriptorProto_TYPE_STRING:
+		fixed = "len(" + val + ")"
+		varint = fixed
+	case descriptor.FieldDescriptorProto_TYPE_GROUP:
+		fixed = g.Pkg["proto"] + ".Size(" + val + ")"
+	case descriptor.FieldDescriptorProto_TYPE_MESSAGE:
+		g.P("s := ", g.Pkg["proto"], ".Size(", val, ")")
+		fixed = "s"
+		varint = fixed
+	case descriptor.FieldDescriptorProto_TYPE_BYTES:
+		fixed = "len(" + val + ")"
+		varint = fixed
+	case descriptor.FieldDescriptorProto_TYPE_SINT32:
+		varint = "(uint32(" + val + ") << 1) ^ uint32((int32(" + val + ") >> 31))"
+	case descriptor.FieldDescriptorProto_TYPE_SINT64:
+		varint = "uint64(" + val + " << 1) ^ uint64((int64(" + val + ") >> 63))"
+	default:
+		g.Fail("unhandled oneof field type ", f.protoType.String())
+	}
+	// Tag and wire varint is known statically,
+	// so don't generate code for that part of the size computation.
+	tagAndWireSize := proto.SizeVarint(uint64(f.fieldNumber << 3)) // wire doesn't affect varint size
+	g.P("n += ", tagAndWireSize, " // tag and wire")
+	if varint != "" {
+		g.P("n += ", g.Pkg["proto"], ".SizeVarint(uint64(", varint, "))")
+	}
+	if fixed != "" {
+		g.P("n += ", fixed)
+	}
+	if f.protoType == descriptor.FieldDescriptorProto_TYPE_GROUP {
+		g.P("n += ", tagAndWireSize, " // tag and wire")
+	}
+}
+
+// getProtoDef returns the default value explicitly stated in the proto file, e.g "yoshi" or "5".
+func (f *oneofSubField) getProtoDef() string {
+	return f.protoDef
+}
+
+// getProtoTypeName returns the protobuf type name for the field as returned by field.GetTypeName(), e.g. ".google.protobuf.Duration".
+func (f *oneofSubField) getProtoTypeName() string {
+	return f.protoTypeName
+}
+
+// getProtoType returns the *field.Type value, e.g. descriptor.FieldDescriptorProto_TYPE_FIXED64.
+func (f *oneofSubField) getProtoType() descriptor.FieldDescriptorProto_Type {
+	return f.protoType
+}
+
+// oneofField represents the oneof on top level.
+// The alternative fields within the oneof are represented by oneofSubField.
+type oneofField struct {
+	fieldCommon
+	subFields []*oneofSubField // All the possible oneof fields
+	comment   string           // The full comment for the field, e.g. "// Types that are valid to be assigned to MyOneof:\n\\"
+}
+
+// decl prints the declaration of the field in the struct (if any).
+func (f *oneofField) decl(g *Generator, mc *msgCtx) {
+	comment := f.comment
+	for _, sf := range f.subFields {
+		comment += "//\t*" + sf.oneofTypeName + "\n"
+	}
+	g.P(comment, Annotate(mc.message.file, f.fullPath, f.goName), " ", f.goType, " `", f.tags, "`")
+}
+
+// getter for a oneof field will print additional discriminators and interfaces for the oneof,
+// also it prints all the getters for the sub fields.
+func (f *oneofField) getter(g *Generator, mc *msgCtx) {
+	// The discriminator type
+	g.P("type ", f.goType, " interface {")
+	g.P(f.goType, "()")
+	g.P("}")
+	g.P()
+	// The subField types, fulfilling the discriminator type contract
+	for _, sf := range f.subFields {
+		g.P("type ", Annotate(mc.message.file, sf.fullPath, sf.oneofTypeName), " struct {")
+		g.P(Annotate(mc.message.file, sf.fullPath, sf.goName), " ", sf.goType, " `", sf.tags, "`")
+		g.P("}")
+		g.P()
+	}
+	for _, sf := range f.subFields {
+		g.P("func (*", sf.oneofTypeName, ") ", f.goType, "() {}")
+		g.P()
+	}
+	// Getter for the oneof field
+	g.P("func (m *", mc.goName, ") ", Annotate(mc.message.file, f.fullPath, f.getterName), "() ", f.goType, " {")
+	g.P("if m != nil { return m.", f.goName, " }")
+	g.P("return nil")
+	g.P("}")
+	g.P()
+	// Getters for each oneof
+	for _, sf := range f.subFields {
+		g.P("func (m *", mc.goName, ") ", Annotate(mc.message.file, sf.fullPath, sf.getterName), "() "+sf.goType+" {")
+		g.P("if x, ok := m.", f.getterName, "().(*", sf.oneofTypeName, "); ok {")
+		g.P("return x.", sf.goName)
+		g.P("}")
+		g.P("return ", sf.getterDef)
+		g.P("}")
+		g.P()
+	}
+}
+
+// setter prints the setter method of the field.
+func (f *oneofField) setter(g *Generator, mc *msgCtx) {
+	// No setters for oneof yet
+}
+
+// topLevelField interface implemented by all types of fields on the top level (not oneofSubField).
+type topLevelField interface {
+	decl(g *Generator, mc *msgCtx)   // print declaration within the struct
+	getter(g *Generator, mc *msgCtx) // print getter
+	setter(g *Generator, mc *msgCtx) // print setter if applicable
+}
+
+// defField interface implemented by all types of fields that can have defaults (not oneofField, but instead oneofSubField).
+type defField interface {
+	getProtoDef() string                                // default value explicitly stated in the proto file, e.g "yoshi" or "5"
+	getProtoName() string                               // proto name of a field, e.g. "field_name" or "descriptor"
+	getGoType() string                                  // go type of the field  as a string, e.g. "*int32"
+	getProtoTypeName() string                           // protobuf type name for the field, e.g. ".google.protobuf.Duration"
+	getProtoType() descriptor.FieldDescriptorProto_Type // *field.Type value, e.g. descriptor.FieldDescriptorProto_TYPE_FIXED64
+}
+
+// generateDefaultConstants adds constants for default values if needed, which is only if the default value is.
+// explicit in the proto.
+func (g *Generator) generateDefaultConstants(mc *msgCtx, topLevelFields []topLevelField) {
+	// Collect fields that can have defaults
+	dFields := []defField{}
+	for _, pf := range topLevelFields {
+		if f, ok := pf.(*oneofField); ok {
+			for _, osf := range f.subFields {
+				dFields = append(dFields, osf)
+			}
+			continue
+		}
+		dFields = append(dFields, pf.(defField))
+	}
+	for _, df := range dFields {
+		def := df.getProtoDef()
+		if def == "" {
+			continue
+		}
+		fieldname := g.defaultConstantName(mc.goName, df.getProtoName())
+		typename := df.getGoType()
+		if typename[0] == '*' {
+			typename = typename[1:]
+		}
+		kind := "const "
+		switch {
+		case typename == "bool":
+		case typename == "string":
+			def = strconv.Quote(def)
+		case typename == "[]byte":
+			def = "[]byte(" + strconv.Quote(unescape(def)) + ")"
+			kind = "var "
+		case def == "inf", def == "-inf", def == "nan":
+			// These names are known to, and defined by, the protocol language.
+			switch def {
+			case "inf":
+				def = "math.Inf(1)"
+			case "-inf":
+				def = "math.Inf(-1)"
+			case "nan":
+				def = "math.NaN()"
+			}
+			if df.getProtoType() == descriptor.FieldDescriptorProto_TYPE_FLOAT {
+				def = "float32(" + def + ")"
+			}
+			kind = "var "
+		case df.getProtoType() == descriptor.FieldDescriptorProto_TYPE_ENUM:
+			// Must be an enum.  Need to construct the prefixed name.
+			obj := g.ObjectNamed(df.getProtoTypeName())
+			var enum *EnumDescriptor
+			if id, ok := obj.(*ImportedDescriptor); ok {
+				// The enum type has been publicly imported.
+				enum, _ = id.o.(*EnumDescriptor)
+			} else {
+				enum, _ = obj.(*EnumDescriptor)
+			}
+			if enum == nil {
+				log.Printf("don't know how to generate constant for %s", fieldname)
+				continue
+			}
+			def = g.DefaultPackageName(obj) + enum.prefix() + def
+		}
+		g.P(kind, fieldname, " ", typename, " = ", def)
+		g.file.addExport(mc.message, constOrVarSymbol{fieldname, kind, ""})
+	}
+	g.P()
+}
+
+// generateInternalStructFields just adds the XXX_<something> fields to the message struct.
+func (g *Generator) generateInternalStructFields(mc *msgCtx, topLevelFields []topLevelField) {
+	g.P("XXX_NoUnkeyedLiteral\tstruct{} `json:\"-\"`") // prevent unkeyed struct literals
+	if len(mc.message.ExtensionRange) > 0 {
+		messageset := ""
+		if opts := mc.message.Options; opts != nil && opts.GetMessageSetWireFormat() {
+			messageset = "protobuf_messageset:\"1\" "
+		}
+		g.P(g.Pkg["proto"], ".XXX_InternalExtensions `", messageset, "json:\"-\"`")
+	}
+	g.P("XXX_unrecognized\t[]byte `json:\"-\"`")
+	g.P("XXX_sizecache\tint32 `json:\"-\"`")
+
+}
+
+// generateOneofFuncs adds all the utility functions for oneof, including marshalling, unmarshalling and sizer.
+func (g *Generator) generateOneofFuncs(mc *msgCtx, topLevelFields []topLevelField) {
+	ofields := []*oneofField{}
+	for _, f := range topLevelFields {
+		if o, ok := f.(*oneofField); ok {
+			ofields = append(ofields, o)
+		}
+	}
+	if len(ofields) == 0 {
+		return
+	}
+	enc := "_" + mc.goName + "_OneofMarshaler"
+	dec := "_" + mc.goName + "_OneofUnmarshaler"
+	size := "_" + mc.goName + "_OneofSizer"
+	encSig := "(msg " + g.Pkg["proto"] + ".Message, b *" + g.Pkg["proto"] + ".Buffer) error"
+	decSig := "(msg " + g.Pkg["proto"] + ".Message, tag, wire int, b *" + g.Pkg["proto"] + ".Buffer) (bool, error)"
+	sizeSig := "(msg " + g.Pkg["proto"] + ".Message) (n int)"
+
+	// OneofFuncs
+	g.P("// XXX_OneofFuncs is for the internal use of the proto package.")
+	g.P("func (*", mc.goName, ") XXX_OneofFuncs() (func", encSig, ", func", decSig, ", func", sizeSig, ", []interface{}) {")
+	g.P("return ", enc, ", ", dec, ", ", size, ", []interface{}{")
+	for _, of := range ofields {
+		for _, sf := range of.subFields {
+			sf.typedNil(g)
+		}
+	}
+	g.P("}")
+	g.P("}")
+	g.P()
+
+	// marshaler
+	g.P("func ", enc, encSig, " {")
+	g.P("m := msg.(*", mc.goName, ")")
+	for _, of := range ofields {
+		g.P("// ", of.getProtoName())
+		g.P("switch x := m.", of.goName, ".(type) {")
+		for _, sf := range of.subFields {
+			// also fills in field.wire
+			sf.marshalCase(g)
+		}
+		g.P("case nil:")
+		g.P("default:")
+		g.P(" return ", g.Pkg["fmt"], `.Errorf("`, mc.goName, ".", of.goName, ` has unexpected type %T", x)`)
+		g.P("}")
+	}
+	g.P("return nil")
+	g.P("}")
+	g.P()
+
+	// unmarshaler
+	g.P("func ", dec, decSig, " {")
+	g.P("m := msg.(*", mc.goName, ")")
+	g.P("switch tag {")
+	for _, of := range ofields {
+		for _, sf := range of.subFields {
+			sf.unmarshalCase(g, of.getProtoName(), of.goName)
+		}
+	}
+	g.P("default:")
+	g.P("return false, nil")
+	g.P("}")
+	g.P("}")
+	g.P()
+
+	// sizer
+	g.P("func ", size, sizeSig, " {")
+	g.P("m := msg.(*", mc.goName, ")")
+	for _, of := range ofields {
+		g.P("// ", of.getProtoName())
+		g.P("switch x := m.", of.goName, ".(type) {")
+		for _, sf := range of.subFields {
+			// also fills in field.wire
+			sf.sizerCase(g)
+		}
+		g.P("case nil:")
+		g.P("default:")
+		g.P("panic(", g.Pkg["fmt"], ".Sprintf(\"proto: unexpected type %T in oneof\", x))")
+		g.P("}")
+	}
+	g.P("return n")
+	g.P("}")
+	g.P()
+}
+
+// generateMessageStruct adds the actual struct with it's members (but not methods) to the output.
+func (g *Generator) generateMessageStruct(mc *msgCtx, topLevelFields []topLevelField) {
+	comments := g.PrintComments(mc.message.path)
+
+	// Guarantee deprecation comments appear after user-provided comments.
+	if mc.message.GetOptions().GetDeprecated() {
+		if comments {
+			// Convention: Separate deprecation comments from original
+			// comments with an empty line.
+			g.P("//")
+		}
+		g.P(deprecationComment)
+	}
+
+	g.P("type ", Annotate(mc.message.file, mc.message.path, mc.goName), " struct {")
+	for _, pf := range topLevelFields {
+		pf.decl(g, mc)
+	}
+	g.generateInternalStructFields(mc, topLevelFields)
+	g.P("}")
+}
+
+// generateGetters adds getters for all fields, including oneofs and weak fields when applicable.
+func (g *Generator) generateGetters(mc *msgCtx, topLevelFields []topLevelField) {
+	for _, pf := range topLevelFields {
+		pf.getter(g, mc)
+	}
+}
+
+// generateSetters add setters for all fields, including oneofs and weak fields when applicable.
+func (g *Generator) generateSetters(mc *msgCtx, topLevelFields []topLevelField) {
+	for _, pf := range topLevelFields {
+		pf.setter(g, mc)
+	}
+}
+
+// generateCommonMethods adds methods to the message that are not on a per field basis.
+func (g *Generator) generateCommonMethods(mc *msgCtx) {
+	// Reset, String and ProtoMessage methods.
+	g.P("func (m *", mc.goName, ") Reset() { *m = ", mc.goName, "{} }")
+	g.P("func (m *", mc.goName, ") String() string { return ", g.Pkg["proto"], ".CompactTextString(m) }")
+	g.P("func (*", mc.goName, ") ProtoMessage() {}")
+	var indexes []string
+	for m := mc.message; m != nil; m = m.parent {
+		indexes = append([]string{strconv.Itoa(m.index)}, indexes...)
+	}
+	g.P("func (*", mc.goName, ") Descriptor() ([]byte, []int) {")
+	g.P("return ", g.file.VarName(), ", []int{", strings.Join(indexes, ", "), "}")
+	g.P("}")
+	// TODO: Revisit the decision to use a XXX_WellKnownType method
+	// if we change proto.MessageName to work with multiple equivalents.
+	if mc.message.file.GetPackage() == "google.protobuf" && wellKnownTypes[mc.message.GetName()] {
+		g.P("func (*", mc.goName, `) XXX_WellKnownType() string { return "`, mc.message.GetName(), `" }`)
+	}
+
+	// Extension support methods
+	if len(mc.message.ExtensionRange) > 0 {
+		// message_set_wire_format only makes sense when extensions are defined.
+		if opts := mc.message.Options; opts != nil && opts.GetMessageSetWireFormat() {
+			g.P()
+			g.P("func (m *", mc.goName, ") MarshalJSON() ([]byte, error) {")
+			g.P("return ", g.Pkg["proto"], ".MarshalMessageSetJSON(&m.XXX_InternalExtensions)")
+			g.P("}")
+			g.P("func (m *", mc.goName, ") UnmarshalJSON(buf []byte) error {")
+			g.P("return ", g.Pkg["proto"], ".UnmarshalMessageSetJSON(buf, &m.XXX_InternalExtensions)")
+			g.P("}")
+		}
+
+		g.P()
+		g.P("var extRange_", mc.goName, " = []", g.Pkg["proto"], ".ExtensionRange{")
+		for _, r := range mc.message.ExtensionRange {
+			end := fmt.Sprint(*r.End - 1) // make range inclusive on both ends
+			g.P("{Start: ", r.Start, ", End: ", end, "},")
+		}
+		g.P("}")
+		g.P("func (*", mc.goName, ") ExtensionRangeArray() []", g.Pkg["proto"], ".ExtensionRange {")
+		g.P("return extRange_", mc.goName)
+		g.P("}")
+	}
+
+	// TODO: It does not scale to keep adding another method for every
+	// operation on protos that we want to switch over to using the
+	// table-driven approach. Instead, we should only add a single method
+	// that allows getting access to the *InternalMessageInfo struct and then
+	// calling Unmarshal, Marshal, Merge, Size, and Discard directly on that.
+
+	// Wrapper for table-driven marshaling and unmarshaling.
+	g.P("func (m *", mc.goName, ") XXX_Unmarshal(b []byte) error {")
+	g.P("return xxx_messageInfo_", mc.goName, ".Unmarshal(m, b)")
+	g.P("}")
+
+	g.P("func (m *", mc.goName, ") XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {")
+	g.P("return xxx_messageInfo_", mc.goName, ".Marshal(b, m, deterministic)")
+	g.P("}")
+
+	g.P("func (dst *", mc.goName, ") XXX_Merge(src ", g.Pkg["proto"], ".Message) {")
+	g.P("xxx_messageInfo_", mc.goName, ".Merge(dst, src)")
+	g.P("}")
+
+	g.P("func (m *", mc.goName, ") XXX_Size() int {") // avoid name clash with "Size" field in some message
+	g.P("return xxx_messageInfo_", mc.goName, ".Size(m)")
+	g.P("}")
+
+	g.P("func (m *", mc.goName, ") XXX_DiscardUnknown() {")
+	g.P("xxx_messageInfo_", mc.goName, ".DiscardUnknown(m)")
+	g.P("}")
+
+	g.P("var xxx_messageInfo_", mc.goName, " ", g.Pkg["proto"], ".InternalMessageInfo")
+	g.P()
+}
+
+// Generate the type, methods and default constant definitions for this Descriptor.
+func (g *Generator) generateMessage(message *Descriptor) {
+	topLevelFields := []topLevelField{}
+	oFields := make(map[int32]*oneofField)
+	// The full type name
+	typeName := message.TypeName()
+	// The full type name, CamelCased.
+	goTypeName := CamelCaseSlice(typeName)
+
+	usedNames := make(map[string]bool)
+	for _, n := range methodNames {
+		usedNames[n] = true
+	}
+
+	// allocNames finds a conflict-free variation of the given strings,
+	// consistently mutating their suffixes.
+	// It returns the same number of strings.
+	allocNames := func(ns ...string) []string {
+	Loop:
+		for {
+			for _, n := range ns {
+				if usedNames[n] {
+					for i := range ns {
+						ns[i] += "_"
+					}
+					continue Loop
+				}
+			}
+			for _, n := range ns {
+				usedNames[n] = true
+			}
+			return ns
+		}
+	}
+
+	mapFieldTypes := make(map[*descriptor.FieldDescriptorProto]string) // keep track of the map fields to be added later
+
+	// Build a structure more suitable for generating the text in one pass
+	for i, field := range message.Field {
+		// Allocate the getter and the field at the same time so name
+		// collisions create field/method consistent names.
+		// TODO: This allocation occurs based on the order of the fields
+		// in the proto file, meaning that a change in the field
+		// ordering can change generated Method/Field names.
+		base := CamelCase(*field.Name)
+		ns := allocNames(base, "Get"+base)
+		fieldName, fieldGetterName := ns[0], ns[1]
+		typename, wiretype := g.GoType(message, field)
+		jsonName := *field.Name
+		tag := fmt.Sprintf("protobuf:%s json:%q", g.goTag(message, field, wiretype), jsonName+",omitempty")
+
+		oneof := field.OneofIndex != nil
+		if oneof && oFields[*field.OneofIndex] == nil {
+			odp := message.OneofDecl[int(*field.OneofIndex)]
+			base := CamelCase(odp.GetName())
+			names := allocNames(base, "Get"+base)
+			fname, gname := names[0], names[1]
+
+			// This is the first field of a oneof we haven't seen before.
+			// Generate the union field.
+			oneofFullPath := fmt.Sprintf("%s,%d,%d", message.path, messageOneofPath, *field.OneofIndex)
+			c, ok := g.makeComments(oneofFullPath)
+			if ok {
+				c += "\n//\n"
+			}
+			c += "// Types that are valid to be assigned to " + fname + ":\n"
+			// Generate the rest of this comment later,
+			// when we've computed any disambiguation.
+
+			dname := "is" + goTypeName + "_" + fname
+			tag := `protobuf_oneof:"` + odp.GetName() + `"`
+			of := oneofField{
+				fieldCommon: fieldCommon{
+					goName:     fname,
+					getterName: gname,
+					goType:     dname,
+					tags:       tag,
+					protoName:  odp.GetName(),
+					fullPath:   oneofFullPath,
+				},
+				comment: c,
+			}
+			topLevelFields = append(topLevelFields, &of)
+			oFields[*field.OneofIndex] = &of
+		}
+
+		if *field.Type == descriptor.FieldDescriptorProto_TYPE_MESSAGE {
+			desc := g.ObjectNamed(field.GetTypeName())
+			if d, ok := desc.(*Descriptor); ok && d.GetOptions().GetMapEntry() {
+				// Figure out the Go types and tags for the key and value types.
+				keyField, valField := d.Field[0], d.Field[1]
+				keyType, keyWire := g.GoType(d, keyField)
+				valType, valWire := g.GoType(d, valField)
+				keyTag, valTag := g.goTag(d, keyField, keyWire), g.goTag(d, valField, valWire)
+
+				// We don't use stars, except for message-typed values.
+				// Message and enum types are the only two possibly foreign types used in maps,
+				// so record their use. They are not permitted as map keys.
+				keyType = strings.TrimPrefix(keyType, "*")
+				switch *valField.Type {
+				case descriptor.FieldDescriptorProto_TYPE_ENUM:
+					valType = strings.TrimPrefix(valType, "*")
+					g.RecordTypeUse(valField.GetTypeName())
+				case descriptor.FieldDescriptorProto_TYPE_MESSAGE:
+					g.RecordTypeUse(valField.GetTypeName())
+				default:
+					valType = strings.TrimPrefix(valType, "*")
+				}
+
+				typename = fmt.Sprintf("map[%s]%s", keyType, valType)
+				mapFieldTypes[field] = typename // record for the getter generation
+
+				tag += fmt.Sprintf(" protobuf_key:%s protobuf_val:%s", keyTag, valTag)
+			}
+		}
+
+		dvalue := g.getterDefault(field, goTypeName)
+		if oneof {
+			tname := goTypeName + "_" + fieldName
+			// It is possible for this to collide with a message or enum
+			// nested in this message. Check for collisions.
+			for {
+				ok := true
+				for _, desc := range message.nested {
+					if CamelCaseSlice(desc.TypeName()) == tname {
+						ok = false
+						break
+					}
+				}
+				for _, enum := range message.enums {
+					if CamelCaseSlice(enum.TypeName()) == tname {
+						ok = false
+						break
+					}
+				}
+				if !ok {
+					tname += "_"
+					continue
+				}
+				break
+			}
+
+			oneofField := oFields[*field.OneofIndex]
+			tag := "protobuf:" + g.goTag(message, field, wiretype)
+			sf := oneofSubField{
+				fieldCommon: fieldCommon{
+					goName:     fieldName,
+					getterName: fieldGetterName,
+					goType:     typename,
+					tags:       tag,
+					protoName:  field.GetName(),
+					fullPath:   fmt.Sprintf("%s,%d,%d", message.path, messageFieldPath, i),
+				},
+				protoTypeName: field.GetTypeName(),
+				fieldNumber:   int(*field.Number),
+				protoType:     *field.Type,
+				getterDef:     dvalue,
+				protoDef:      field.GetDefaultValue(),
+				oneofTypeName: tname,
+			}
+			oneofField.subFields = append(oneofField.subFields, &sf)
+			g.RecordTypeUse(field.GetTypeName())
+			continue
+		}
+
+		fieldDeprecated := ""
+		if field.GetOptions().GetDeprecated() {
+			fieldDeprecated = deprecationComment
+		}
+
+		fieldFullPath := fmt.Sprintf("%s,%d,%d", message.path, messageFieldPath, i)
+		c, ok := g.makeComments(fieldFullPath)
+		if ok {
+			c += "\n"
+		}
+		rf := simpleField{
+			fieldCommon: fieldCommon{
+				goName:     fieldName,
+				getterName: fieldGetterName,
+				goType:     typename,
+				tags:       tag,
+				protoName:  field.GetName(),
+				fullPath:   fieldFullPath,
+			},
+			protoTypeName: field.GetTypeName(),
+			protoType:     *field.Type,
+			deprecated:    fieldDeprecated,
+			getterDef:     dvalue,
+			protoDef:      field.GetDefaultValue(),
+			comment:       c,
+		}
+		var pf topLevelField = &rf
+
+		topLevelFields = append(topLevelFields, pf)
+		g.RecordTypeUse(field.GetTypeName())
+	}
+
+	mc := &msgCtx{
+		goName:  goTypeName,
+		message: message,
+	}
+
+	g.generateMessageStruct(mc, topLevelFields)
+	g.P()
+	g.generateCommonMethods(mc)
+	g.P()
+	g.generateDefaultConstants(mc, topLevelFields)
+	g.P()
+	g.generateGetters(mc, topLevelFields)
+	g.P()
+	g.generateSetters(mc, topLevelFields)
+	g.P()
+	g.generateOneofFuncs(mc, topLevelFields)
+	g.P()
+
+	if !message.group {
+
+		var oneofTypes []string
+		for _, f := range topLevelFields {
+			if of, ok := f.(*oneofField); ok {
+				for _, osf := range of.subFields {
+					oneofTypes = append(oneofTypes, osf.oneofTypeName)
+				}
+			}
+		}
+
+		opts := message.Options
+		ms := &messageSymbol{
+			sym:           goTypeName,
+			hasExtensions: len(message.ExtensionRange) > 0,
+			isMessageSet:  opts != nil && opts.GetMessageSetWireFormat(),
+			oneofTypes:    oneofTypes,
+		}
+		g.file.addExport(message, ms)
+	}
+
+	for _, ext := range message.ext {
+		g.generateExtension(ext)
+	}
+
+	fullName := strings.Join(message.TypeName(), ".")
+	if g.file.Package != nil {
+		fullName = *g.file.Package + "." + fullName
+	}
+
+	g.addInitf("%s.RegisterType((*%s)(nil), %q)", g.Pkg["proto"], goTypeName, fullName)
+	// Register types for native map types.
+	for _, k := range mapFieldKeys(mapFieldTypes) {
+		fullName := strings.TrimPrefix(*k.TypeName, ".")
+		g.addInitf("%s.RegisterMapType((%s)(nil), %q)", g.Pkg["proto"], mapFieldTypes[k], fullName)
+	}
+
+}
+
+type byTypeName []*descriptor.FieldDescriptorProto
+
+func (a byTypeName) Len() int           { return len(a) }
+func (a byTypeName) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+func (a byTypeName) Less(i, j int) bool { return *a[i].TypeName < *a[j].TypeName }
+
+// mapFieldKeys returns the keys of m in a consistent order.
+func mapFieldKeys(m map[*descriptor.FieldDescriptorProto]string) []*descriptor.FieldDescriptorProto {
+	keys := make([]*descriptor.FieldDescriptorProto, 0, len(m))
+	for k := range m {
+		keys = append(keys, k)
+	}
+	sort.Sort(byTypeName(keys))
+	return keys
+}
+
+var escapeChars = [256]byte{
+	'a': '\a', 'b': '\b', 'f': '\f', 'n': '\n', 'r': '\r', 't': '\t', 'v': '\v', '\\': '\\', '"': '"', '\'': '\'', '?': '?',
+}
+
+// unescape reverses the "C" escaping that protoc does for default values of bytes fields.
+// It is best effort in that it effectively ignores malformed input. Seemingly invalid escape
+// sequences are conveyed, unmodified, into the decoded result.
+func unescape(s string) string {
+	// NB: Sadly, we can't use strconv.Unquote because protoc will escape both
+	// single and double quotes, but strconv.Unquote only allows one or the
+	// other (based on actual surrounding quotes of its input argument).
+
+	var out []byte
+	for len(s) > 0 {
+		// regular character, or too short to be valid escape
+		if s[0] != '\\' || len(s) < 2 {
+			out = append(out, s[0])
+			s = s[1:]
+		} else if c := escapeChars[s[1]]; c != 0 {
+			// escape sequence
+			out = append(out, c)
+			s = s[2:]
+		} else if s[1] == 'x' || s[1] == 'X' {
+			// hex escape, e.g. "\x80
+			if len(s) < 4 {
+				// too short to be valid
+				out = append(out, s[:2]...)
+				s = s[2:]
+				continue
+			}
+			v, err := strconv.ParseUint(s[2:4], 16, 8)
+			if err != nil {
+				out = append(out, s[:4]...)
+			} else {
+				out = append(out, byte(v))
+			}
+			s = s[4:]
+		} else if '0' <= s[1] && s[1] <= '7' {
+			// octal escape, can vary from 1 to 3 octal digits; e.g., "\0" "\40" or "\164"
+			// so consume up to 2 more bytes or up to end-of-string
+			n := len(s[1:]) - len(strings.TrimLeft(s[1:], "01234567"))
+			if n > 3 {
+				n = 3
+			}
+			v, err := strconv.ParseUint(s[1:1+n], 8, 8)
+			if err != nil {
+				out = append(out, s[:1+n]...)
+			} else {
+				out = append(out, byte(v))
+			}
+			s = s[1+n:]
+		} else {
+			// bad escape, just propagate the slash as-is
+			out = append(out, s[0])
+			s = s[1:]
+		}
+	}
+
+	return string(out)
+}
+
+func (g *Generator) generateExtension(ext *ExtensionDescriptor) {
+	ccTypeName := ext.DescName()
+
+	extObj := g.ObjectNamed(*ext.Extendee)
+	var extDesc *Descriptor
+	if id, ok := extObj.(*ImportedDescriptor); ok {
+		// This is extending a publicly imported message.
+		// We need the underlying type for goTag.
+		extDesc = id.o.(*Descriptor)
+	} else {
+		extDesc = extObj.(*Descriptor)
+	}
+	extendedType := "*" + g.TypeName(extObj) // always use the original
+	field := ext.FieldDescriptorProto
+	fieldType, wireType := g.GoType(ext.parent, field)
+	tag := g.goTag(extDesc, field, wireType)
+	g.RecordTypeUse(*ext.Extendee)
+	if n := ext.FieldDescriptorProto.TypeName; n != nil {
+		// foreign extension type
+		g.RecordTypeUse(*n)
+	}
+
+	typeName := ext.TypeName()
+
+	// Special case for proto2 message sets: If this extension is extending
+	// proto2.bridge.MessageSet, and its final name component is "message_set_extension",
+	// then drop that last component.
+	//
+	// TODO: This should be implemented in the text formatter rather than the generator.
+	// In addition, the situation for when to apply this special case is implemented
+	// differently in other languages:
+	// https://github.com/google/protobuf/blob/aff10976/src/google/protobuf/text_format.cc#L1560
+	mset := false
+	if extDesc.GetOptions().GetMessageSetWireFormat() && typeName[len(typeName)-1] == "message_set_extension" {
+		typeName = typeName[:len(typeName)-1]
+		mset = true
+	}
+
+	// For text formatting, the package must be exactly what the .proto file declares,
+	// ignoring overrides such as the go_package option, and with no dot/underscore mapping.
+	extName := strings.Join(typeName, ".")
+	if g.file.Package != nil {
+		extName = *g.file.Package + "." + extName
+	}
+
+	g.P("var ", ccTypeName, " = &", g.Pkg["proto"], ".ExtensionDesc{")
+	g.P("ExtendedType: (", extendedType, ")(nil),")
+	g.P("ExtensionType: (", fieldType, ")(nil),")
+	g.P("Field: ", field.Number, ",")
+	g.P(`Name: "`, extName, `",`)
+	g.P("Tag: ", tag, ",")
+	g.P(`Filename: "`, g.file.GetName(), `",`)
+
+	g.P("}")
+	g.P()
+
+	if mset {
+		// Generate a bit more code to register with message_set.go.
+		g.addInitf("%s.RegisterMessageSetType((%s)(nil), %d, %q)", g.Pkg["proto"], fieldType, *field.Number, extName)
+	}
+
+	g.file.addExport(ext, constOrVarSymbol{ccTypeName, "var", ""})
+}
+
+func (g *Generator) generateInitFunction() {
+	for _, enum := range g.file.enum {
+		g.generateEnumRegistration(enum)
+	}
+	for _, d := range g.file.desc {
+		for _, ext := range d.ext {
+			g.generateExtensionRegistration(ext)
+		}
+	}
+	for _, ext := range g.file.ext {
+		g.generateExtensionRegistration(ext)
+	}
+	if len(g.init) == 0 {
+		return
+	}
+	g.P("func init() {")
+	for _, l := range g.init {
+		g.P(l)
+	}
+	g.P("}")
+	g.init = nil
+}
+
+func (g *Generator) generateFileDescriptor(file *FileDescriptor) {
+	// Make a copy and trim source_code_info data.
+	// TODO: Trim this more when we know exactly what we need.
+	pb := proto.Clone(file.FileDescriptorProto).(*descriptor.FileDescriptorProto)
+	pb.SourceCodeInfo = nil
+
+	b, err := proto.Marshal(pb)
+	if err != nil {
+		g.Fail(err.Error())
+	}
+
+	var buf bytes.Buffer
+	w, _ := gzip.NewWriterLevel(&buf, gzip.BestCompression)
+	w.Write(b)
+	w.Close()
+	b = buf.Bytes()
+
+	v := file.VarName()
+	g.P()
+	g.P("func init() { ", g.Pkg["proto"], ".RegisterFile(", strconv.Quote(*file.Name), ", ", v, ") }")
+	g.P("var ", v, " = []byte{")
+	g.P("// ", len(b), " bytes of a gzipped FileDescriptorProto")
+	for len(b) > 0 {
+		n := 16
+		if n > len(b) {
+			n = len(b)
+		}
+
+		s := ""
+		for _, c := range b[:n] {
+			s += fmt.Sprintf("0x%02x,", c)
+		}
+		g.P(s)
+
+		b = b[n:]
+	}
+	g.P("}")
+}
+
+func (g *Generator) generateEnumRegistration(enum *EnumDescriptor) {
+	// // We always print the full (proto-world) package name here.
+	pkg := enum.File().GetPackage()
+	if pkg != "" {
+		pkg += "."
+	}
+	// The full type name
+	typeName := enum.TypeName()
+	// The full type name, CamelCased.
+	ccTypeName := CamelCaseSlice(typeName)
+	g.addInitf("%s.RegisterEnum(%q, %[3]s_name, %[3]s_value)", g.Pkg["proto"], pkg+ccTypeName, ccTypeName)
+}
+
+func (g *Generator) generateExtensionRegistration(ext *ExtensionDescriptor) {
+	g.addInitf("%s.RegisterExtension(%s)", g.Pkg["proto"], ext.DescName())
+}
+
+// And now lots of helper functions.
+
+// Is c an ASCII lower-case letter?
+func isASCIILower(c byte) bool {
+	return 'a' <= c && c <= 'z'
+}
+
+// Is c an ASCII digit?
+func isASCIIDigit(c byte) bool {
+	return '0' <= c && c <= '9'
+}
+
+// CamelCase returns the CamelCased name.
+// If there is an interior underscore followed by a lower case letter,
+// drop the underscore and convert the letter to upper case.
+// There is a remote possibility of this rewrite causing a name collision,
+// but it's so remote we're prepared to pretend it's nonexistent - since the
+// C++ generator lowercases names, it's extremely unlikely to have two fields
+// with different capitalizations.
+// In short, _my_field_name_2 becomes XMyFieldName_2.
+func CamelCase(s string) string {
+	if s == "" {
+		return ""
+	}
+	t := make([]byte, 0, 32)
+	i := 0
+	if s[0] == '_' {
+		// Need a capital letter; drop the '_'.
+		t = append(t, 'X')
+		i++
+	}
+	// Invariant: if the next letter is lower case, it must be converted
+	// to upper case.
+	// That is, we process a word at a time, where words are marked by _ or
+	// upper case letter. Digits are treated as words.
+	for ; i < len(s); i++ {
+		c := s[i]
+		if c == '_' && i+1 < len(s) && isASCIILower(s[i+1]) {
+			continue // Skip the underscore in s.
+		}
+		if isASCIIDigit(c) {
+			t = append(t, c)
+			continue
+		}
+		// Assume we have a letter now - if not, it's a bogus identifier.
+		// The next word is a sequence of characters that must start upper case.
+		if isASCIILower(c) {
+			c ^= ' ' // Make it a capital letter.
+		}
+		t = append(t, c) // Guaranteed not lower case.
+		// Accept lower case sequence that follows.
+		for i+1 < len(s) && isASCIILower(s[i+1]) {
+			i++
+			t = append(t, s[i])
+		}
+	}
+	return string(t)
+}
+
+// CamelCaseSlice is like CamelCase, but the argument is a slice of strings to
+// be joined with "_".
+func CamelCaseSlice(elem []string) string { return CamelCase(strings.Join(elem, "_")) }
+
+// dottedSlice turns a sliced name into a dotted name.
+func dottedSlice(elem []string) string { return strings.Join(elem, ".") }
+
+// Is this field optional?
+func isOptional(field *descriptor.FieldDescriptorProto) bool {
+	return field.Label != nil && *field.Label == descriptor.FieldDescriptorProto_LABEL_OPTIONAL
+}
+
+// Is this field required?
+func isRequired(field *descriptor.FieldDescriptorProto) bool {
+	return field.Label != nil && *field.Label == descriptor.FieldDescriptorProto_LABEL_REQUIRED
+}
+
+// Is this field repeated?
+func isRepeated(field *descriptor.FieldDescriptorProto) bool {
+	return field.Label != nil && *field.Label == descriptor.FieldDescriptorProto_LABEL_REPEATED
+}
+
+// Is this field a scalar numeric type?
+func isScalar(field *descriptor.FieldDescriptorProto) bool {
+	if field.Type == nil {
+		return false
+	}
+	switch *field.Type {
+	case descriptor.FieldDescriptorProto_TYPE_DOUBLE,
+		descriptor.FieldDescriptorProto_TYPE_FLOAT,
+		descriptor.FieldDescriptorProto_TYPE_INT64,
+		descriptor.FieldDescriptorProto_TYPE_UINT64,
+		descriptor.FieldDescriptorProto_TYPE_INT32,
+		descriptor.FieldDescriptorProto_TYPE_FIXED64,
+		descriptor.FieldDescriptorProto_TYPE_FIXED32,
+		descriptor.FieldDescriptorProto_TYPE_BOOL,
+		descriptor.FieldDescriptorProto_TYPE_UINT32,
+		descriptor.FieldDescriptorProto_TYPE_ENUM,
+		descriptor.FieldDescriptorProto_TYPE_SFIXED32,
+		descriptor.FieldDescriptorProto_TYPE_SFIXED64,
+		descriptor.FieldDescriptorProto_TYPE_SINT32,
+		descriptor.FieldDescriptorProto_TYPE_SINT64:
+		return true
+	default:
+		return false
+	}
+}
+
+// badToUnderscore is the mapping function used to generate Go names from package names,
+// which can be dotted in the input .proto file.  It replaces non-identifier characters such as
+// dot or dash with underscore.
+func badToUnderscore(r rune) rune {
+	if unicode.IsLetter(r) || unicode.IsDigit(r) || r == '_' {
+		return r
+	}
+	return '_'
+}
+
+// baseName returns the last path element of the name, with the last dotted suffix removed.
+func baseName(name string) string {
+	// First, find the last element
+	if i := strings.LastIndex(name, "/"); i >= 0 {
+		name = name[i+1:]
+	}
+	// Now drop the suffix
+	if i := strings.LastIndex(name, "."); i >= 0 {
+		name = name[0:i]
+	}
+	return name
+}
+
+// The SourceCodeInfo message describes the location of elements of a parsed
+// .proto file by way of a "path", which is a sequence of integers that
+// describe the route from a FileDescriptorProto to the relevant submessage.
+// The path alternates between a field number of a repeated field, and an index
+// into that repeated field. The constants below define the field numbers that
+// are used.
+//
+// See descriptor.proto for more information about this.
+const (
+	// tag numbers in FileDescriptorProto
+	packagePath = 2 // package
+	messagePath = 4 // message_type
+	enumPath    = 5 // enum_type
+	// tag numbers in DescriptorProto
+	messageFieldPath   = 2 // field
+	messageMessagePath = 3 // nested_type
+	messageEnumPath    = 4 // enum_type
+	messageOneofPath   = 8 // oneof_decl
+	// tag numbers in EnumDescriptorProto
+	enumValuePath = 2 // value
+)
+
+var supportTypeAliases bool
+
+func init() {
+	for _, tag := range build.Default.ReleaseTags {
+		if tag == "go1.9" {
+			supportTypeAliases = true
+			return
+		}
+	}
+}
diff --git a/go/vendor/github.com/golang/protobuf/protoc-gen-go/generator/internal/remap/remap.go b/go/vendor/github.com/golang/protobuf/protoc-gen-go/generator/internal/remap/remap.go
new file mode 100644
index 0000000..a9b6103
--- /dev/null
+++ b/go/vendor/github.com/golang/protobuf/protoc-gen-go/generator/internal/remap/remap.go
@@ -0,0 +1,117 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2017 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/*
+Package remap handles tracking the locations of Go tokens in a source text
+across a rewrite by the Go formatter.
+*/
+package remap
+
+import (
+	"fmt"
+	"go/scanner"
+	"go/token"
+)
+
+// A Location represents a span of byte offsets in the source text.
+type Location struct {
+	Pos, End int // End is exclusive
+}
+
+// A Map represents a mapping between token locations in an input source text
+// and locations in the correspnding output text.
+type Map map[Location]Location
+
+// Find reports whether the specified span is recorded by m, and if so returns
+// the new location it was mapped to. If the input span was not found, the
+// returned location is the same as the input.
+func (m Map) Find(pos, end int) (Location, bool) {
+	key := Location{
+		Pos: pos,
+		End: end,
+	}
+	if loc, ok := m[key]; ok {
+		return loc, true
+	}
+	return key, false
+}
+
+func (m Map) add(opos, oend, npos, nend int) {
+	m[Location{Pos: opos, End: oend}] = Location{Pos: npos, End: nend}
+}
+
+// Compute constructs a location mapping from input to output.  An error is
+// reported if any of the tokens of output cannot be mapped.
+func Compute(input, output []byte) (Map, error) {
+	itok := tokenize(input)
+	otok := tokenize(output)
+	if len(itok) != len(otok) {
+		return nil, fmt.Errorf("wrong number of tokens, %d ≠ %d", len(itok), len(otok))
+	}
+	m := make(Map)
+	for i, ti := range itok {
+		to := otok[i]
+		if ti.Token != to.Token {
+			return nil, fmt.Errorf("token %d type mismatch: %s ≠ %s", i+1, ti, to)
+		}
+		m.add(ti.pos, ti.end, to.pos, to.end)
+	}
+	return m, nil
+}
+
+// tokinfo records the span and type of a source token.
+type tokinfo struct {
+	pos, end int
+	token.Token
+}
+
+func tokenize(src []byte) []tokinfo {
+	fs := token.NewFileSet()
+	var s scanner.Scanner
+	s.Init(fs.AddFile("src", fs.Base(), len(src)), src, nil, scanner.ScanComments)
+	var info []tokinfo
+	for {
+		pos, next, lit := s.Scan()
+		switch next {
+		case token.SEMICOLON:
+			continue
+		}
+		info = append(info, tokinfo{
+			pos:   int(pos - 1),
+			end:   int(pos + token.Pos(len(lit)) - 1),
+			Token: next,
+		})
+		if next == token.EOF {
+			break
+		}
+	}
+	return info
+}
diff --git a/go/vendor/github.com/golang/protobuf/protoc-gen-go/grpc/grpc.go b/go/vendor/github.com/golang/protobuf/protoc-gen-go/grpc/grpc.go
new file mode 100644
index 0000000..faef1ab
--- /dev/null
+++ b/go/vendor/github.com/golang/protobuf/protoc-gen-go/grpc/grpc.go
@@ -0,0 +1,484 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2015 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Package grpc outputs gRPC service descriptions in Go code.
+// It runs as a plugin for the Go protocol buffer compiler plugin.
+// It is linked in to protoc-gen-go.
+package grpc
+
+import (
+	"fmt"
+	"path"
+	"strconv"
+	"strings"
+
+	pb "github.com/golang/protobuf/protoc-gen-go/descriptor"
+	"github.com/golang/protobuf/protoc-gen-go/generator"
+)
+
+// generatedCodeVersion indicates a version of the generated code.
+// It is incremented whenever an incompatibility between the generated code and
+// the grpc package is introduced; the generated code references
+// a constant, grpc.SupportPackageIsVersionN (where N is generatedCodeVersion).
+const generatedCodeVersion = 4
+
+// Paths for packages used by code generated in this file,
+// relative to the import_prefix of the generator.Generator.
+const (
+	contextPkgPath = "golang.org/x/net/context"
+	grpcPkgPath    = "google.golang.org/grpc"
+)
+
+func init() {
+	generator.RegisterPlugin(new(grpc))
+}
+
+// grpc is an implementation of the Go protocol buffer compiler's
+// plugin architecture.  It generates bindings for gRPC support.
+type grpc struct {
+	gen *generator.Generator
+}
+
+// Name returns the name of this plugin, "grpc".
+func (g *grpc) Name() string {
+	return "grpc"
+}
+
+// The names for packages imported in the generated code.
+// They may vary from the final path component of the import path
+// if the name is used by other packages.
+var (
+	contextPkg string
+	grpcPkg    string
+)
+
+// Init initializes the plugin.
+func (g *grpc) Init(gen *generator.Generator) {
+	g.gen = gen
+	contextPkg = generator.RegisterUniquePackageName("context", nil)
+	grpcPkg = generator.RegisterUniquePackageName("grpc", nil)
+}
+
+// Given a type name defined in a .proto, return its object.
+// Also record that we're using it, to guarantee the associated import.
+func (g *grpc) objectNamed(name string) generator.Object {
+	g.gen.RecordTypeUse(name)
+	return g.gen.ObjectNamed(name)
+}
+
+// Given a type name defined in a .proto, return its name as we will print it.
+func (g *grpc) typeName(str string) string {
+	return g.gen.TypeName(g.objectNamed(str))
+}
+
+// P forwards to g.gen.P.
+func (g *grpc) P(args ...interface{}) { g.gen.P(args...) }
+
+// Generate generates code for the services in the given file.
+func (g *grpc) Generate(file *generator.FileDescriptor) {
+	if len(file.FileDescriptorProto.Service) == 0 {
+		return
+	}
+
+	g.P("// Reference imports to suppress errors if they are not otherwise used.")
+	g.P("var _ ", contextPkg, ".Context")
+	g.P("var _ ", grpcPkg, ".ClientConn")
+	g.P()
+
+	// Assert version compatibility.
+	g.P("// This is a compile-time assertion to ensure that this generated file")
+	g.P("// is compatible with the grpc package it is being compiled against.")
+	g.P("const _ = ", grpcPkg, ".SupportPackageIsVersion", generatedCodeVersion)
+	g.P()
+
+	for i, service := range file.FileDescriptorProto.Service {
+		g.generateService(file, service, i)
+	}
+}
+
+// GenerateImports generates the import declaration for this file.
+func (g *grpc) GenerateImports(file *generator.FileDescriptor) {
+	if len(file.FileDescriptorProto.Service) == 0 {
+		return
+	}
+	g.P("import (")
+	g.P(contextPkg, " ", generator.GoImportPath(path.Join(string(g.gen.ImportPrefix), contextPkgPath)))
+	g.P(grpcPkg, " ", generator.GoImportPath(path.Join(string(g.gen.ImportPrefix), grpcPkgPath)))
+	g.P(")")
+	g.P()
+}
+
+// reservedClientName records whether a client name is reserved on the client side.
+var reservedClientName = map[string]bool{
+	// TODO: do we need any in gRPC?
+}
+
+func unexport(s string) string { return strings.ToLower(s[:1]) + s[1:] }
+
+// deprecationComment is the standard comment added to deprecated
+// messages, fields, enums, and enum values.
+var deprecationComment = "// Deprecated: Do not use."
+
+// generateService generates all the code for the named service.
+func (g *grpc) generateService(file *generator.FileDescriptor, service *pb.ServiceDescriptorProto, index int) {
+	path := fmt.Sprintf("6,%d", index) // 6 means service.
+
+	origServName := service.GetName()
+	fullServName := origServName
+	if pkg := file.GetPackage(); pkg != "" {
+		fullServName = pkg + "." + fullServName
+	}
+	servName := generator.CamelCase(origServName)
+	deprecated := service.GetOptions().GetDeprecated()
+
+	g.P()
+	g.P(fmt.Sprintf(`// %sClient is the client API for %s service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.`, servName, servName))
+
+	// Client interface.
+	if deprecated {
+		g.P("//")
+		g.P(deprecationComment)
+	}
+	g.P("type ", servName, "Client interface {")
+	for i, method := range service.Method {
+		g.gen.PrintComments(fmt.Sprintf("%s,2,%d", path, i)) // 2 means method in a service.
+		g.P(g.generateClientSignature(servName, method))
+	}
+	g.P("}")
+	g.P()
+
+	// Client structure.
+	g.P("type ", unexport(servName), "Client struct {")
+	g.P("cc *", grpcPkg, ".ClientConn")
+	g.P("}")
+	g.P()
+
+	// NewClient factory.
+	if deprecated {
+		g.P(deprecationComment)
+	}
+	g.P("func New", servName, "Client (cc *", grpcPkg, ".ClientConn) ", servName, "Client {")
+	g.P("return &", unexport(servName), "Client{cc}")
+	g.P("}")
+	g.P()
+
+	var methodIndex, streamIndex int
+	serviceDescVar := "_" + servName + "_serviceDesc"
+	// Client method implementations.
+	for _, method := range service.Method {
+		var descExpr string
+		if !method.GetServerStreaming() && !method.GetClientStreaming() {
+			// Unary RPC method
+			descExpr = fmt.Sprintf("&%s.Methods[%d]", serviceDescVar, methodIndex)
+			methodIndex++
+		} else {
+			// Streaming RPC method
+			descExpr = fmt.Sprintf("&%s.Streams[%d]", serviceDescVar, streamIndex)
+			streamIndex++
+		}
+		g.generateClientMethod(servName, fullServName, serviceDescVar, method, descExpr)
+	}
+
+	// Server interface.
+	serverType := servName + "Server"
+	g.P("// ", serverType, " is the server API for ", servName, " service.")
+	if deprecated {
+		g.P("//")
+		g.P(deprecationComment)
+	}
+	g.P("type ", serverType, " interface {")
+	for i, method := range service.Method {
+		g.gen.PrintComments(fmt.Sprintf("%s,2,%d", path, i)) // 2 means method in a service.
+		g.P(g.generateServerSignature(servName, method))
+	}
+	g.P("}")
+	g.P()
+
+	// Server registration.
+	if deprecated {
+		g.P(deprecationComment)
+	}
+	g.P("func Register", servName, "Server(s *", grpcPkg, ".Server, srv ", serverType, ") {")
+	g.P("s.RegisterService(&", serviceDescVar, `, srv)`)
+	g.P("}")
+	g.P()
+
+	// Server handler implementations.
+	var handlerNames []string
+	for _, method := range service.Method {
+		hname := g.generateServerMethod(servName, fullServName, method)
+		handlerNames = append(handlerNames, hname)
+	}
+
+	// Service descriptor.
+	g.P("var ", serviceDescVar, " = ", grpcPkg, ".ServiceDesc {")
+	g.P("ServiceName: ", strconv.Quote(fullServName), ",")
+	g.P("HandlerType: (*", serverType, ")(nil),")
+	g.P("Methods: []", grpcPkg, ".MethodDesc{")
+	for i, method := range service.Method {
+		if method.GetServerStreaming() || method.GetClientStreaming() {
+			continue
+		}
+		g.P("{")
+		g.P("MethodName: ", strconv.Quote(method.GetName()), ",")
+		g.P("Handler: ", handlerNames[i], ",")
+		g.P("},")
+	}
+	g.P("},")
+	g.P("Streams: []", grpcPkg, ".StreamDesc{")
+	for i, method := range service.Method {
+		if !method.GetServerStreaming() && !method.GetClientStreaming() {
+			continue
+		}
+		g.P("{")
+		g.P("StreamName: ", strconv.Quote(method.GetName()), ",")
+		g.P("Handler: ", handlerNames[i], ",")
+		if method.GetServerStreaming() {
+			g.P("ServerStreams: true,")
+		}
+		if method.GetClientStreaming() {
+			g.P("ClientStreams: true,")
+		}
+		g.P("},")
+	}
+	g.P("},")
+	g.P("Metadata: \"", file.GetName(), "\",")
+	g.P("}")
+	g.P()
+}
+
+// generateClientSignature returns the client-side signature for a method.
+func (g *grpc) generateClientSignature(servName string, method *pb.MethodDescriptorProto) string {
+	origMethName := method.GetName()
+	methName := generator.CamelCase(origMethName)
+	if reservedClientName[methName] {
+		methName += "_"
+	}
+	reqArg := ", in *" + g.typeName(method.GetInputType())
+	if method.GetClientStreaming() {
+		reqArg = ""
+	}
+	respName := "*" + g.typeName(method.GetOutputType())
+	if method.GetServerStreaming() || method.GetClientStreaming() {
+		respName = servName + "_" + generator.CamelCase(origMethName) + "Client"
+	}
+	return fmt.Sprintf("%s(ctx %s.Context%s, opts ...%s.CallOption) (%s, error)", methName, contextPkg, reqArg, grpcPkg, respName)
+}
+
+func (g *grpc) generateClientMethod(servName, fullServName, serviceDescVar string, method *pb.MethodDescriptorProto, descExpr string) {
+	sname := fmt.Sprintf("/%s/%s", fullServName, method.GetName())
+	methName := generator.CamelCase(method.GetName())
+	inType := g.typeName(method.GetInputType())
+	outType := g.typeName(method.GetOutputType())
+
+	if method.GetOptions().GetDeprecated() {
+		g.P(deprecationComment)
+	}
+	g.P("func (c *", unexport(servName), "Client) ", g.generateClientSignature(servName, method), "{")
+	if !method.GetServerStreaming() && !method.GetClientStreaming() {
+		g.P("out := new(", outType, ")")
+		// TODO: Pass descExpr to Invoke.
+		g.P(`err := c.cc.Invoke(ctx, "`, sname, `", in, out, opts...)`)
+		g.P("if err != nil { return nil, err }")
+		g.P("return out, nil")
+		g.P("}")
+		g.P()
+		return
+	}
+	streamType := unexport(servName) + methName + "Client"
+	g.P("stream, err := c.cc.NewStream(ctx, ", descExpr, `, "`, sname, `", opts...)`)
+	g.P("if err != nil { return nil, err }")
+	g.P("x := &", streamType, "{stream}")
+	if !method.GetClientStreaming() {
+		g.P("if err := x.ClientStream.SendMsg(in); err != nil { return nil, err }")
+		g.P("if err := x.ClientStream.CloseSend(); err != nil { return nil, err }")
+	}
+	g.P("return x, nil")
+	g.P("}")
+	g.P()
+
+	genSend := method.GetClientStreaming()
+	genRecv := method.GetServerStreaming()
+	genCloseAndRecv := !method.GetServerStreaming()
+
+	// Stream auxiliary types and methods.
+	g.P("type ", servName, "_", methName, "Client interface {")
+	if genSend {
+		g.P("Send(*", inType, ") error")
+	}
+	if genRecv {
+		g.P("Recv() (*", outType, ", error)")
+	}
+	if genCloseAndRecv {
+		g.P("CloseAndRecv() (*", outType, ", error)")
+	}
+	g.P(grpcPkg, ".ClientStream")
+	g.P("}")
+	g.P()
+
+	g.P("type ", streamType, " struct {")
+	g.P(grpcPkg, ".ClientStream")
+	g.P("}")
+	g.P()
+
+	if genSend {
+		g.P("func (x *", streamType, ") Send(m *", inType, ") error {")
+		g.P("return x.ClientStream.SendMsg(m)")
+		g.P("}")
+		g.P()
+	}
+	if genRecv {
+		g.P("func (x *", streamType, ") Recv() (*", outType, ", error) {")
+		g.P("m := new(", outType, ")")
+		g.P("if err := x.ClientStream.RecvMsg(m); err != nil { return nil, err }")
+		g.P("return m, nil")
+		g.P("}")
+		g.P()
+	}
+	if genCloseAndRecv {
+		g.P("func (x *", streamType, ") CloseAndRecv() (*", outType, ", error) {")
+		g.P("if err := x.ClientStream.CloseSend(); err != nil { return nil, err }")
+		g.P("m := new(", outType, ")")
+		g.P("if err := x.ClientStream.RecvMsg(m); err != nil { return nil, err }")
+		g.P("return m, nil")
+		g.P("}")
+		g.P()
+	}
+}
+
+// generateServerSignature returns the server-side signature for a method.
+func (g *grpc) generateServerSignature(servName string, method *pb.MethodDescriptorProto) string {
+	origMethName := method.GetName()
+	methName := generator.CamelCase(origMethName)
+	if reservedClientName[methName] {
+		methName += "_"
+	}
+
+	var reqArgs []string
+	ret := "error"
+	if !method.GetServerStreaming() && !method.GetClientStreaming() {
+		reqArgs = append(reqArgs, contextPkg+".Context")
+		ret = "(*" + g.typeName(method.GetOutputType()) + ", error)"
+	}
+	if !method.GetClientStreaming() {
+		reqArgs = append(reqArgs, "*"+g.typeName(method.GetInputType()))
+	}
+	if method.GetServerStreaming() || method.GetClientStreaming() {
+		reqArgs = append(reqArgs, servName+"_"+generator.CamelCase(origMethName)+"Server")
+	}
+
+	return methName + "(" + strings.Join(reqArgs, ", ") + ") " + ret
+}
+
+func (g *grpc) generateServerMethod(servName, fullServName string, method *pb.MethodDescriptorProto) string {
+	methName := generator.CamelCase(method.GetName())
+	hname := fmt.Sprintf("_%s_%s_Handler", servName, methName)
+	inType := g.typeName(method.GetInputType())
+	outType := g.typeName(method.GetOutputType())
+
+	if !method.GetServerStreaming() && !method.GetClientStreaming() {
+		g.P("func ", hname, "(srv interface{}, ctx ", contextPkg, ".Context, dec func(interface{}) error, interceptor ", grpcPkg, ".UnaryServerInterceptor) (interface{}, error) {")
+		g.P("in := new(", inType, ")")
+		g.P("if err := dec(in); err != nil { return nil, err }")
+		g.P("if interceptor == nil { return srv.(", servName, "Server).", methName, "(ctx, in) }")
+		g.P("info := &", grpcPkg, ".UnaryServerInfo{")
+		g.P("Server: srv,")
+		g.P("FullMethod: ", strconv.Quote(fmt.Sprintf("/%s/%s", fullServName, methName)), ",")
+		g.P("}")
+		g.P("handler := func(ctx ", contextPkg, ".Context, req interface{}) (interface{}, error) {")
+		g.P("return srv.(", servName, "Server).", methName, "(ctx, req.(*", inType, "))")
+		g.P("}")
+		g.P("return interceptor(ctx, in, info, handler)")
+		g.P("}")
+		g.P()
+		return hname
+	}
+	streamType := unexport(servName) + methName + "Server"
+	g.P("func ", hname, "(srv interface{}, stream ", grpcPkg, ".ServerStream) error {")
+	if !method.GetClientStreaming() {
+		g.P("m := new(", inType, ")")
+		g.P("if err := stream.RecvMsg(m); err != nil { return err }")
+		g.P("return srv.(", servName, "Server).", methName, "(m, &", streamType, "{stream})")
+	} else {
+		g.P("return srv.(", servName, "Server).", methName, "(&", streamType, "{stream})")
+	}
+	g.P("}")
+	g.P()
+
+	genSend := method.GetServerStreaming()
+	genSendAndClose := !method.GetServerStreaming()
+	genRecv := method.GetClientStreaming()
+
+	// Stream auxiliary types and methods.
+	g.P("type ", servName, "_", methName, "Server interface {")
+	if genSend {
+		g.P("Send(*", outType, ") error")
+	}
+	if genSendAndClose {
+		g.P("SendAndClose(*", outType, ") error")
+	}
+	if genRecv {
+		g.P("Recv() (*", inType, ", error)")
+	}
+	g.P(grpcPkg, ".ServerStream")
+	g.P("}")
+	g.P()
+
+	g.P("type ", streamType, " struct {")
+	g.P(grpcPkg, ".ServerStream")
+	g.P("}")
+	g.P()
+
+	if genSend {
+		g.P("func (x *", streamType, ") Send(m *", outType, ") error {")
+		g.P("return x.ServerStream.SendMsg(m)")
+		g.P("}")
+		g.P()
+	}
+	if genSendAndClose {
+		g.P("func (x *", streamType, ") SendAndClose(m *", outType, ") error {")
+		g.P("return x.ServerStream.SendMsg(m)")
+		g.P("}")
+		g.P()
+	}
+	if genRecv {
+		g.P("func (x *", streamType, ") Recv() (*", inType, ", error) {")
+		g.P("m := new(", inType, ")")
+		g.P("if err := x.ServerStream.RecvMsg(m); err != nil { return nil, err }")
+		g.P("return m, nil")
+		g.P("}")
+		g.P()
+	}
+
+	return hname
+}
diff --git a/go/vendor/github.com/golang/protobuf/protoc-gen-go/link_grpc.go b/go/vendor/github.com/golang/protobuf/protoc-gen-go/link_grpc.go
new file mode 100644
index 0000000..532a550
--- /dev/null
+++ b/go/vendor/github.com/golang/protobuf/protoc-gen-go/link_grpc.go
@@ -0,0 +1,34 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2015 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package main
+
+import _ "github.com/golang/protobuf/protoc-gen-go/grpc"
diff --git a/go/vendor/github.com/golang/protobuf/protoc-gen-go/main.go b/go/vendor/github.com/golang/protobuf/protoc-gen-go/main.go
new file mode 100644
index 0000000..8e2486d
--- /dev/null
+++ b/go/vendor/github.com/golang/protobuf/protoc-gen-go/main.go
@@ -0,0 +1,98 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// protoc-gen-go is a plugin for the Google protocol buffer compiler to generate
+// Go code.  Run it by building this program and putting it in your path with
+// the name
+// 	protoc-gen-go
+// That word 'go' at the end becomes part of the option string set for the
+// protocol compiler, so once the protocol compiler (protoc) is installed
+// you can run
+// 	protoc --go_out=output_directory input_directory/file.proto
+// to generate Go bindings for the protocol defined by file.proto.
+// With that input, the output will be written to
+// 	output_directory/file.pb.go
+//
+// The generated code is documented in the package comment for
+// the library.
+//
+// See the README and documentation for protocol buffers to learn more:
+// 	https://developers.google.com/protocol-buffers/
+package main
+
+import (
+	"io/ioutil"
+	"os"
+
+	"github.com/golang/protobuf/proto"
+	"github.com/golang/protobuf/protoc-gen-go/generator"
+)
+
+func main() {
+	// Begin by allocating a generator. The request and response structures are stored there
+	// so we can do error handling easily - the response structure contains the field to
+	// report failure.
+	g := generator.New()
+
+	data, err := ioutil.ReadAll(os.Stdin)
+	if err != nil {
+		g.Error(err, "reading input")
+	}
+
+	if err := proto.Unmarshal(data, g.Request); err != nil {
+		g.Error(err, "parsing input proto")
+	}
+
+	if len(g.Request.FileToGenerate) == 0 {
+		g.Fail("no files to generate")
+	}
+
+	g.CommandLineParameters(g.Request.GetParameter())
+
+	// Create a wrapped version of the Descriptors and EnumDescriptors that
+	// point to the file that defines them.
+	g.WrapTypes()
+
+	g.SetPackageNames()
+	g.BuildTypeNameMap()
+
+	g.GenerateAllFiles()
+
+	// Send back the results.
+	data, err = proto.Marshal(g.Response)
+	if err != nil {
+		g.Error(err, "failed to marshal output proto")
+	}
+	_, err = os.Stdout.Write(data)
+	if err != nil {
+		g.Error(err, "failed to write output proto")
+	}
+}
diff --git a/go/vendor/github.com/golang/protobuf/protoc-gen-go/plugin/plugin.pb.go b/go/vendor/github.com/golang/protobuf/protoc-gen-go/plugin/plugin.pb.go
new file mode 100644
index 0000000..61bfc10
--- /dev/null
+++ b/go/vendor/github.com/golang/protobuf/protoc-gen-go/plugin/plugin.pb.go
@@ -0,0 +1,369 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/protobuf/compiler/plugin.proto
+
+/*
+Package plugin_go is a generated protocol buffer package.
+
+It is generated from these files:
+	google/protobuf/compiler/plugin.proto
+
+It has these top-level messages:
+	Version
+	CodeGeneratorRequest
+	CodeGeneratorResponse
+*/
+package plugin_go
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import google_protobuf "github.com/golang/protobuf/protoc-gen-go/descriptor"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// The version number of protocol compiler.
+type Version struct {
+	Major *int32 `protobuf:"varint,1,opt,name=major" json:"major,omitempty"`
+	Minor *int32 `protobuf:"varint,2,opt,name=minor" json:"minor,omitempty"`
+	Patch *int32 `protobuf:"varint,3,opt,name=patch" json:"patch,omitempty"`
+	// A suffix for alpha, beta or rc release, e.g., "alpha-1", "rc2". It should
+	// be empty for mainline stable releases.
+	Suffix               *string  `protobuf:"bytes,4,opt,name=suffix" json:"suffix,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Version) Reset()                    { *m = Version{} }
+func (m *Version) String() string            { return proto.CompactTextString(m) }
+func (*Version) ProtoMessage()               {}
+func (*Version) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+func (m *Version) Unmarshal(b []byte) error {
+	return xxx_messageInfo_Version.Unmarshal(m, b)
+}
+func (m *Version) Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Version.Marshal(b, m, deterministic)
+}
+func (dst *Version) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Version.Merge(dst, src)
+}
+func (m *Version) XXX_Size() int {
+	return xxx_messageInfo_Version.Size(m)
+}
+func (m *Version) XXX_DiscardUnknown() {
+	xxx_messageInfo_Version.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Version proto.InternalMessageInfo
+
+func (m *Version) GetMajor() int32 {
+	if m != nil && m.Major != nil {
+		return *m.Major
+	}
+	return 0
+}
+
+func (m *Version) GetMinor() int32 {
+	if m != nil && m.Minor != nil {
+		return *m.Minor
+	}
+	return 0
+}
+
+func (m *Version) GetPatch() int32 {
+	if m != nil && m.Patch != nil {
+		return *m.Patch
+	}
+	return 0
+}
+
+func (m *Version) GetSuffix() string {
+	if m != nil && m.Suffix != nil {
+		return *m.Suffix
+	}
+	return ""
+}
+
+// An encoded CodeGeneratorRequest is written to the plugin's stdin.
+type CodeGeneratorRequest struct {
+	// The .proto files that were explicitly listed on the command-line.  The
+	// code generator should generate code only for these files.  Each file's
+	// descriptor will be included in proto_file, below.
+	FileToGenerate []string `protobuf:"bytes,1,rep,name=file_to_generate,json=fileToGenerate" json:"file_to_generate,omitempty"`
+	// The generator parameter passed on the command-line.
+	Parameter *string `protobuf:"bytes,2,opt,name=parameter" json:"parameter,omitempty"`
+	// FileDescriptorProtos for all files in files_to_generate and everything
+	// they import.  The files will appear in topological order, so each file
+	// appears before any file that imports it.
+	//
+	// protoc guarantees that all proto_files will be written after
+	// the fields above, even though this is not technically guaranteed by the
+	// protobuf wire format.  This theoretically could allow a plugin to stream
+	// in the FileDescriptorProtos and handle them one by one rather than read
+	// the entire set into memory at once.  However, as of this writing, this
+	// is not similarly optimized on protoc's end -- it will store all fields in
+	// memory at once before sending them to the plugin.
+	//
+	// Type names of fields and extensions in the FileDescriptorProto are always
+	// fully qualified.
+	ProtoFile []*google_protobuf.FileDescriptorProto `protobuf:"bytes,15,rep,name=proto_file,json=protoFile" json:"proto_file,omitempty"`
+	// The version number of protocol compiler.
+	CompilerVersion      *Version `protobuf:"bytes,3,opt,name=compiler_version,json=compilerVersion" json:"compiler_version,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *CodeGeneratorRequest) Reset()                    { *m = CodeGeneratorRequest{} }
+func (m *CodeGeneratorRequest) String() string            { return proto.CompactTextString(m) }
+func (*CodeGeneratorRequest) ProtoMessage()               {}
+func (*CodeGeneratorRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+func (m *CodeGeneratorRequest) Unmarshal(b []byte) error {
+	return xxx_messageInfo_CodeGeneratorRequest.Unmarshal(m, b)
+}
+func (m *CodeGeneratorRequest) Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CodeGeneratorRequest.Marshal(b, m, deterministic)
+}
+func (dst *CodeGeneratorRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CodeGeneratorRequest.Merge(dst, src)
+}
+func (m *CodeGeneratorRequest) XXX_Size() int {
+	return xxx_messageInfo_CodeGeneratorRequest.Size(m)
+}
+func (m *CodeGeneratorRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_CodeGeneratorRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CodeGeneratorRequest proto.InternalMessageInfo
+
+func (m *CodeGeneratorRequest) GetFileToGenerate() []string {
+	if m != nil {
+		return m.FileToGenerate
+	}
+	return nil
+}
+
+func (m *CodeGeneratorRequest) GetParameter() string {
+	if m != nil && m.Parameter != nil {
+		return *m.Parameter
+	}
+	return ""
+}
+
+func (m *CodeGeneratorRequest) GetProtoFile() []*google_protobuf.FileDescriptorProto {
+	if m != nil {
+		return m.ProtoFile
+	}
+	return nil
+}
+
+func (m *CodeGeneratorRequest) GetCompilerVersion() *Version {
+	if m != nil {
+		return m.CompilerVersion
+	}
+	return nil
+}
+
+// The plugin writes an encoded CodeGeneratorResponse to stdout.
+type CodeGeneratorResponse struct {
+	// Error message.  If non-empty, code generation failed.  The plugin process
+	// should exit with status code zero even if it reports an error in this way.
+	//
+	// This should be used to indicate errors in .proto files which prevent the
+	// code generator from generating correct code.  Errors which indicate a
+	// problem in protoc itself -- such as the input CodeGeneratorRequest being
+	// unparseable -- should be reported by writing a message to stderr and
+	// exiting with a non-zero status code.
+	Error                *string                       `protobuf:"bytes,1,opt,name=error" json:"error,omitempty"`
+	File                 []*CodeGeneratorResponse_File `protobuf:"bytes,15,rep,name=file" json:"file,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                      `json:"-"`
+	XXX_unrecognized     []byte                        `json:"-"`
+	XXX_sizecache        int32                         `json:"-"`
+}
+
+func (m *CodeGeneratorResponse) Reset()                    { *m = CodeGeneratorResponse{} }
+func (m *CodeGeneratorResponse) String() string            { return proto.CompactTextString(m) }
+func (*CodeGeneratorResponse) ProtoMessage()               {}
+func (*CodeGeneratorResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+func (m *CodeGeneratorResponse) Unmarshal(b []byte) error {
+	return xxx_messageInfo_CodeGeneratorResponse.Unmarshal(m, b)
+}
+func (m *CodeGeneratorResponse) Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CodeGeneratorResponse.Marshal(b, m, deterministic)
+}
+func (dst *CodeGeneratorResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CodeGeneratorResponse.Merge(dst, src)
+}
+func (m *CodeGeneratorResponse) XXX_Size() int {
+	return xxx_messageInfo_CodeGeneratorResponse.Size(m)
+}
+func (m *CodeGeneratorResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_CodeGeneratorResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CodeGeneratorResponse proto.InternalMessageInfo
+
+func (m *CodeGeneratorResponse) GetError() string {
+	if m != nil && m.Error != nil {
+		return *m.Error
+	}
+	return ""
+}
+
+func (m *CodeGeneratorResponse) GetFile() []*CodeGeneratorResponse_File {
+	if m != nil {
+		return m.File
+	}
+	return nil
+}
+
+// Represents a single generated file.
+type CodeGeneratorResponse_File struct {
+	// The file name, relative to the output directory.  The name must not
+	// contain "." or ".." components and must be relative, not be absolute (so,
+	// the file cannot lie outside the output directory).  "/" must be used as
+	// the path separator, not "\".
+	//
+	// If the name is omitted, the content will be appended to the previous
+	// file.  This allows the generator to break large files into small chunks,
+	// and allows the generated text to be streamed back to protoc so that large
+	// files need not reside completely in memory at one time.  Note that as of
+	// this writing protoc does not optimize for this -- it will read the entire
+	// CodeGeneratorResponse before writing files to disk.
+	Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	// If non-empty, indicates that the named file should already exist, and the
+	// content here is to be inserted into that file at a defined insertion
+	// point.  This feature allows a code generator to extend the output
+	// produced by another code generator.  The original generator may provide
+	// insertion points by placing special annotations in the file that look
+	// like:
+	//   @@protoc_insertion_point(NAME)
+	// The annotation can have arbitrary text before and after it on the line,
+	// which allows it to be placed in a comment.  NAME should be replaced with
+	// an identifier naming the point -- this is what other generators will use
+	// as the insertion_point.  Code inserted at this point will be placed
+	// immediately above the line containing the insertion point (thus multiple
+	// insertions to the same point will come out in the order they were added).
+	// The double-@ is intended to make it unlikely that the generated code
+	// could contain things that look like insertion points by accident.
+	//
+	// For example, the C++ code generator places the following line in the
+	// .pb.h files that it generates:
+	//   // @@protoc_insertion_point(namespace_scope)
+	// This line appears within the scope of the file's package namespace, but
+	// outside of any particular class.  Another plugin can then specify the
+	// insertion_point "namespace_scope" to generate additional classes or
+	// other declarations that should be placed in this scope.
+	//
+	// Note that if the line containing the insertion point begins with
+	// whitespace, the same whitespace will be added to every line of the
+	// inserted text.  This is useful for languages like Python, where
+	// indentation matters.  In these languages, the insertion point comment
+	// should be indented the same amount as any inserted code will need to be
+	// in order to work correctly in that context.
+	//
+	// The code generator that generates the initial file and the one which
+	// inserts into it must both run as part of a single invocation of protoc.
+	// Code generators are executed in the order in which they appear on the
+	// command line.
+	//
+	// If |insertion_point| is present, |name| must also be present.
+	InsertionPoint *string `protobuf:"bytes,2,opt,name=insertion_point,json=insertionPoint" json:"insertion_point,omitempty"`
+	// The file contents.
+	Content              *string  `protobuf:"bytes,15,opt,name=content" json:"content,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *CodeGeneratorResponse_File) Reset()                    { *m = CodeGeneratorResponse_File{} }
+func (m *CodeGeneratorResponse_File) String() string            { return proto.CompactTextString(m) }
+func (*CodeGeneratorResponse_File) ProtoMessage()               {}
+func (*CodeGeneratorResponse_File) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2, 0} }
+func (m *CodeGeneratorResponse_File) Unmarshal(b []byte) error {
+	return xxx_messageInfo_CodeGeneratorResponse_File.Unmarshal(m, b)
+}
+func (m *CodeGeneratorResponse_File) Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CodeGeneratorResponse_File.Marshal(b, m, deterministic)
+}
+func (dst *CodeGeneratorResponse_File) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CodeGeneratorResponse_File.Merge(dst, src)
+}
+func (m *CodeGeneratorResponse_File) XXX_Size() int {
+	return xxx_messageInfo_CodeGeneratorResponse_File.Size(m)
+}
+func (m *CodeGeneratorResponse_File) XXX_DiscardUnknown() {
+	xxx_messageInfo_CodeGeneratorResponse_File.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CodeGeneratorResponse_File proto.InternalMessageInfo
+
+func (m *CodeGeneratorResponse_File) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *CodeGeneratorResponse_File) GetInsertionPoint() string {
+	if m != nil && m.InsertionPoint != nil {
+		return *m.InsertionPoint
+	}
+	return ""
+}
+
+func (m *CodeGeneratorResponse_File) GetContent() string {
+	if m != nil && m.Content != nil {
+		return *m.Content
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*Version)(nil), "google.protobuf.compiler.Version")
+	proto.RegisterType((*CodeGeneratorRequest)(nil), "google.protobuf.compiler.CodeGeneratorRequest")
+	proto.RegisterType((*CodeGeneratorResponse)(nil), "google.protobuf.compiler.CodeGeneratorResponse")
+	proto.RegisterType((*CodeGeneratorResponse_File)(nil), "google.protobuf.compiler.CodeGeneratorResponse.File")
+}
+
+func init() { proto.RegisterFile("google/protobuf/compiler/plugin.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 417 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x74, 0x92, 0xcf, 0x6a, 0x14, 0x41,
+	0x10, 0xc6, 0x19, 0x77, 0x63, 0x98, 0x8a, 0x64, 0x43, 0x13, 0xa5, 0x09, 0x39, 0x8c, 0x8b, 0xe2,
+	0x5c, 0x32, 0x0b, 0xc1, 0x8b, 0x78, 0x4b, 0x44, 0x3d, 0x78, 0x58, 0x1a, 0xf1, 0x20, 0xc8, 0x30,
+	0x99, 0xd4, 0x74, 0x5a, 0x66, 0xba, 0xc6, 0xee, 0x1e, 0xf1, 0x49, 0x7d, 0x0f, 0xdf, 0x40, 0xfa,
+	0xcf, 0x24, 0xb2, 0xb8, 0xa7, 0xee, 0xef, 0x57, 0xd5, 0xd5, 0x55, 0x1f, 0x05, 0x2f, 0x25, 0x91,
+	0xec, 0x71, 0x33, 0x1a, 0x72, 0x74, 0x33, 0x75, 0x9b, 0x96, 0x86, 0x51, 0xf5, 0x68, 0x36, 0x63,
+	0x3f, 0x49, 0xa5, 0xab, 0x10, 0x60, 0x3c, 0xa6, 0x55, 0x73, 0x5a, 0x35, 0xa7, 0x9d, 0x15, 0xbb,
+	0x05, 0x6e, 0xd1, 0xb6, 0x46, 0x8d, 0x8e, 0x4c, 0xcc, 0x5e, 0xb7, 0x70, 0xf8, 0x05, 0x8d, 0x55,
+	0xa4, 0xd9, 0x29, 0x1c, 0x0c, 0xcd, 0x77, 0x32, 0x3c, 0x2b, 0xb2, 0xf2, 0x40, 0x44, 0x11, 0xa8,
+	0xd2, 0x64, 0xf8, 0xa3, 0x44, 0xbd, 0xf0, 0x74, 0x6c, 0x5c, 0x7b, 0xc7, 0x17, 0x91, 0x06, 0xc1,
+	0x9e, 0xc1, 0x63, 0x3b, 0x75, 0x9d, 0xfa, 0xc5, 0x97, 0x45, 0x56, 0xe6, 0x22, 0xa9, 0xf5, 0x9f,
+	0x0c, 0x4e, 0xaf, 0xe9, 0x16, 0x3f, 0xa0, 0x46, 0xd3, 0x38, 0x32, 0x02, 0x7f, 0x4c, 0x68, 0x1d,
+	0x2b, 0xe1, 0xa4, 0x53, 0x3d, 0xd6, 0x8e, 0x6a, 0x19, 0x63, 0xc8, 0xb3, 0x62, 0x51, 0xe6, 0xe2,
+	0xd8, 0xf3, 0xcf, 0x94, 0x5e, 0x20, 0x3b, 0x87, 0x7c, 0x6c, 0x4c, 0x33, 0xa0, 0xc3, 0xd8, 0x4a,
+	0x2e, 0x1e, 0x00, 0xbb, 0x06, 0x08, 0xe3, 0xd4, 0xfe, 0x15, 0x5f, 0x15, 0x8b, 0xf2, 0xe8, 0xf2,
+	0x45, 0xb5, 0x6b, 0xcb, 0x7b, 0xd5, 0xe3, 0xbb, 0x7b, 0x03, 0xb6, 0x1e, 0x8b, 0x3c, 0x44, 0x7d,
+	0x84, 0x7d, 0x82, 0x93, 0xd9, 0xb8, 0xfa, 0x67, 0xf4, 0x24, 0x8c, 0x77, 0x74, 0xf9, 0xbc, 0xda,
+	0xe7, 0x70, 0x95, 0xcc, 0x13, 0xab, 0x99, 0x24, 0xb0, 0xfe, 0x9d, 0xc1, 0xd3, 0x9d, 0x99, 0xed,
+	0x48, 0xda, 0xa2, 0xf7, 0x0e, 0x8d, 0x49, 0x3e, 0xe7, 0x22, 0x0a, 0xf6, 0x11, 0x96, 0xff, 0x34,
+	0xff, 0x7a, 0xff, 0x8f, 0xff, 0x2d, 0x1a, 0x66, 0x13, 0xa1, 0xc2, 0xd9, 0x37, 0x58, 0x86, 0x79,
+	0x18, 0x2c, 0x75, 0x33, 0x60, 0xfa, 0x26, 0xdc, 0xd9, 0x2b, 0x58, 0x29, 0x6d, 0xd1, 0x38, 0x45,
+	0xba, 0x1e, 0x49, 0x69, 0x97, 0xcc, 0x3c, 0xbe, 0xc7, 0x5b, 0x4f, 0x19, 0x87, 0xc3, 0x96, 0xb4,
+	0x43, 0xed, 0xf8, 0x2a, 0x24, 0xcc, 0xf2, 0x4a, 0xc2, 0x79, 0x4b, 0xc3, 0xde, 0xfe, 0xae, 0x9e,
+	0x6c, 0xc3, 0x6e, 0x06, 0x7b, 0xed, 0xd7, 0x37, 0x52, 0xb9, 0xbb, 0xe9, 0xc6, 0x87, 0x37, 0x92,
+	0xfa, 0x46, 0xcb, 0x87, 0x65, 0x0c, 0x97, 0xf6, 0x42, 0xa2, 0xbe, 0x90, 0x94, 0x56, 0xfa, 0x6d,
+	0x3c, 0x6a, 0x49, 0x7f, 0x03, 0x00, 0x00, 0xff, 0xff, 0xf7, 0x15, 0x40, 0xc5, 0xfe, 0x02, 0x00,
+	0x00,
+}
diff --git a/go/vendor/github.com/golang/protobuf/protoc-gen-go/plugin/plugin.pb.golden b/go/vendor/github.com/golang/protobuf/protoc-gen-go/plugin/plugin.pb.golden
new file mode 100644
index 0000000..8953d0f
--- /dev/null
+++ b/go/vendor/github.com/golang/protobuf/protoc-gen-go/plugin/plugin.pb.golden
@@ -0,0 +1,83 @@
+// Code generated by protoc-gen-go.
+// source: google/protobuf/compiler/plugin.proto
+// DO NOT EDIT!
+
+package google_protobuf_compiler
+
+import proto "github.com/golang/protobuf/proto"
+import "math"
+import google_protobuf "github.com/golang/protobuf/protoc-gen-go/descriptor"
+
+// Reference proto and math imports to suppress error if they are not otherwise used.
+var _ = proto.GetString
+var _ = math.Inf
+
+type CodeGeneratorRequest struct {
+	FileToGenerate   []string                               `protobuf:"bytes,1,rep,name=file_to_generate" json:"file_to_generate,omitempty"`
+	Parameter        *string                                `protobuf:"bytes,2,opt,name=parameter" json:"parameter,omitempty"`
+	ProtoFile        []*google_protobuf.FileDescriptorProto `protobuf:"bytes,15,rep,name=proto_file" json:"proto_file,omitempty"`
+	XXX_unrecognized []byte                                 `json:"-"`
+}
+
+func (this *CodeGeneratorRequest) Reset()         { *this = CodeGeneratorRequest{} }
+func (this *CodeGeneratorRequest) String() string { return proto.CompactTextString(this) }
+func (*CodeGeneratorRequest) ProtoMessage()       {}
+
+func (this *CodeGeneratorRequest) GetParameter() string {
+	if this != nil && this.Parameter != nil {
+		return *this.Parameter
+	}
+	return ""
+}
+
+type CodeGeneratorResponse struct {
+	Error            *string                       `protobuf:"bytes,1,opt,name=error" json:"error,omitempty"`
+	File             []*CodeGeneratorResponse_File `protobuf:"bytes,15,rep,name=file" json:"file,omitempty"`
+	XXX_unrecognized []byte                        `json:"-"`
+}
+
+func (this *CodeGeneratorResponse) Reset()         { *this = CodeGeneratorResponse{} }
+func (this *CodeGeneratorResponse) String() string { return proto.CompactTextString(this) }
+func (*CodeGeneratorResponse) ProtoMessage()       {}
+
+func (this *CodeGeneratorResponse) GetError() string {
+	if this != nil && this.Error != nil {
+		return *this.Error
+	}
+	return ""
+}
+
+type CodeGeneratorResponse_File struct {
+	Name             *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	InsertionPoint   *string `protobuf:"bytes,2,opt,name=insertion_point" json:"insertion_point,omitempty"`
+	Content          *string `protobuf:"bytes,15,opt,name=content" json:"content,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (this *CodeGeneratorResponse_File) Reset()         { *this = CodeGeneratorResponse_File{} }
+func (this *CodeGeneratorResponse_File) String() string { return proto.CompactTextString(this) }
+func (*CodeGeneratorResponse_File) ProtoMessage()       {}
+
+func (this *CodeGeneratorResponse_File) GetName() string {
+	if this != nil && this.Name != nil {
+		return *this.Name
+	}
+	return ""
+}
+
+func (this *CodeGeneratorResponse_File) GetInsertionPoint() string {
+	if this != nil && this.InsertionPoint != nil {
+		return *this.InsertionPoint
+	}
+	return ""
+}
+
+func (this *CodeGeneratorResponse_File) GetContent() string {
+	if this != nil && this.Content != nil {
+		return *this.Content
+	}
+	return ""
+}
+
+func init() {
+}
diff --git a/go/vendor/github.com/golang/protobuf/protoc-gen-go/plugin/plugin.proto b/go/vendor/github.com/golang/protobuf/protoc-gen-go/plugin/plugin.proto
new file mode 100644
index 0000000..5b55745
--- /dev/null
+++ b/go/vendor/github.com/golang/protobuf/protoc-gen-go/plugin/plugin.proto
@@ -0,0 +1,167 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Author: kenton@google.com (Kenton Varda)
+//
+// WARNING:  The plugin interface is currently EXPERIMENTAL and is subject to
+//   change.
+//
+// protoc (aka the Protocol Compiler) can be extended via plugins.  A plugin is
+// just a program that reads a CodeGeneratorRequest from stdin and writes a
+// CodeGeneratorResponse to stdout.
+//
+// Plugins written using C++ can use google/protobuf/compiler/plugin.h instead
+// of dealing with the raw protocol defined here.
+//
+// A plugin executable needs only to be placed somewhere in the path.  The
+// plugin should be named "protoc-gen-$NAME", and will then be used when the
+// flag "--${NAME}_out" is passed to protoc.
+
+syntax = "proto2";
+package google.protobuf.compiler;
+option java_package = "com.google.protobuf.compiler";
+option java_outer_classname = "PluginProtos";
+
+option go_package = "github.com/golang/protobuf/protoc-gen-go/plugin;plugin_go";
+
+import "google/protobuf/descriptor.proto";
+
+// The version number of protocol compiler.
+message Version {
+  optional int32 major = 1;
+  optional int32 minor = 2;
+  optional int32 patch = 3;
+  // A suffix for alpha, beta or rc release, e.g., "alpha-1", "rc2". It should
+  // be empty for mainline stable releases.
+  optional string suffix = 4;
+}
+
+// An encoded CodeGeneratorRequest is written to the plugin's stdin.
+message CodeGeneratorRequest {
+  // The .proto files that were explicitly listed on the command-line.  The
+  // code generator should generate code only for these files.  Each file's
+  // descriptor will be included in proto_file, below.
+  repeated string file_to_generate = 1;
+
+  // The generator parameter passed on the command-line.
+  optional string parameter = 2;
+
+  // FileDescriptorProtos for all files in files_to_generate and everything
+  // they import.  The files will appear in topological order, so each file
+  // appears before any file that imports it.
+  //
+  // protoc guarantees that all proto_files will be written after
+  // the fields above, even though this is not technically guaranteed by the
+  // protobuf wire format.  This theoretically could allow a plugin to stream
+  // in the FileDescriptorProtos and handle them one by one rather than read
+  // the entire set into memory at once.  However, as of this writing, this
+  // is not similarly optimized on protoc's end -- it will store all fields in
+  // memory at once before sending them to the plugin.
+  //
+  // Type names of fields and extensions in the FileDescriptorProto are always
+  // fully qualified.
+  repeated FileDescriptorProto proto_file = 15;
+
+  // The version number of protocol compiler.
+  optional Version compiler_version = 3;
+
+}
+
+// The plugin writes an encoded CodeGeneratorResponse to stdout.
+message CodeGeneratorResponse {
+  // Error message.  If non-empty, code generation failed.  The plugin process
+  // should exit with status code zero even if it reports an error in this way.
+  //
+  // This should be used to indicate errors in .proto files which prevent the
+  // code generator from generating correct code.  Errors which indicate a
+  // problem in protoc itself -- such as the input CodeGeneratorRequest being
+  // unparseable -- should be reported by writing a message to stderr and
+  // exiting with a non-zero status code.
+  optional string error = 1;
+
+  // Represents a single generated file.
+  message File {
+    // The file name, relative to the output directory.  The name must not
+    // contain "." or ".." components and must be relative, not be absolute (so,
+    // the file cannot lie outside the output directory).  "/" must be used as
+    // the path separator, not "\".
+    //
+    // If the name is omitted, the content will be appended to the previous
+    // file.  This allows the generator to break large files into small chunks,
+    // and allows the generated text to be streamed back to protoc so that large
+    // files need not reside completely in memory at one time.  Note that as of
+    // this writing protoc does not optimize for this -- it will read the entire
+    // CodeGeneratorResponse before writing files to disk.
+    optional string name = 1;
+
+    // If non-empty, indicates that the named file should already exist, and the
+    // content here is to be inserted into that file at a defined insertion
+    // point.  This feature allows a code generator to extend the output
+    // produced by another code generator.  The original generator may provide
+    // insertion points by placing special annotations in the file that look
+    // like:
+    //   @@protoc_insertion_point(NAME)
+    // The annotation can have arbitrary text before and after it on the line,
+    // which allows it to be placed in a comment.  NAME should be replaced with
+    // an identifier naming the point -- this is what other generators will use
+    // as the insertion_point.  Code inserted at this point will be placed
+    // immediately above the line containing the insertion point (thus multiple
+    // insertions to the same point will come out in the order they were added).
+    // The double-@ is intended to make it unlikely that the generated code
+    // could contain things that look like insertion points by accident.
+    //
+    // For example, the C++ code generator places the following line in the
+    // .pb.h files that it generates:
+    //   // @@protoc_insertion_point(namespace_scope)
+    // This line appears within the scope of the file's package namespace, but
+    // outside of any particular class.  Another plugin can then specify the
+    // insertion_point "namespace_scope" to generate additional classes or
+    // other declarations that should be placed in this scope.
+    //
+    // Note that if the line containing the insertion point begins with
+    // whitespace, the same whitespace will be added to every line of the
+    // inserted text.  This is useful for languages like Python, where
+    // indentation matters.  In these languages, the insertion point comment
+    // should be indented the same amount as any inserted code will need to be
+    // in order to work correctly in that context.
+    //
+    // The code generator that generates the initial file and the one which
+    // inserts into it must both run as part of a single invocation of protoc.
+    // Code generators are executed in the order in which they appear on the
+    // command line.
+    //
+    // If |insertion_point| is present, |name| must also be present.
+    optional string insertion_point = 2;
+
+    // The file contents.
+    optional string content = 15;
+  }
+  repeated File file = 15;
+}
diff --git a/go/vendor/github.com/inconshreveable/mousetrap/LICENSE b/go/vendor/github.com/inconshreveable/mousetrap/LICENSE
new file mode 100644
index 0000000..5f0d1fb
--- /dev/null
+++ b/go/vendor/github.com/inconshreveable/mousetrap/LICENSE
@@ -0,0 +1,13 @@
+Copyright 2014 Alan Shreve
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/go/vendor/github.com/inconshreveable/mousetrap/README.md b/go/vendor/github.com/inconshreveable/mousetrap/README.md
new file mode 100644
index 0000000..7a950d1
--- /dev/null
+++ b/go/vendor/github.com/inconshreveable/mousetrap/README.md
@@ -0,0 +1,23 @@
+# mousetrap
+
+mousetrap is a tiny library that answers a single question.
+
+On a Windows machine, was the process invoked by someone double clicking on
+the executable file while browsing in explorer?
+
+### Motivation
+
+Windows developers unfamiliar with command line tools will often "double-click"
+the executable for a tool. Because most CLI tools print the help and then exit
+when invoked without arguments, this is often very frustrating for those users.
+
+mousetrap provides a way to detect these invocations so that you can provide
+more helpful behavior and instructions on how to run the CLI tool. To see what
+this looks like, both from an organizational and a technical perspective, see
+https://inconshreveable.com/09-09-2014/sweat-the-small-stuff/
+
+### The interface
+
+The library exposes a single interface:
+
+    func StartedByExplorer() (bool)
diff --git a/go/vendor/github.com/inconshreveable/mousetrap/trap_others.go b/go/vendor/github.com/inconshreveable/mousetrap/trap_others.go
new file mode 100644
index 0000000..9d2d8a4
--- /dev/null
+++ b/go/vendor/github.com/inconshreveable/mousetrap/trap_others.go
@@ -0,0 +1,15 @@
+// +build !windows
+
+package mousetrap
+
+// StartedByExplorer returns true if the program was invoked by the user
+// double-clicking on the executable from explorer.exe
+//
+// It is conservative and returns false if any of the internal calls fail.
+// It does not guarantee that the program was run from a terminal. It only can tell you
+// whether it was launched from explorer.exe
+//
+// On non-Windows platforms, it always returns false.
+func StartedByExplorer() bool {
+	return false
+}
diff --git a/go/vendor/github.com/inconshreveable/mousetrap/trap_windows.go b/go/vendor/github.com/inconshreveable/mousetrap/trap_windows.go
new file mode 100644
index 0000000..336142a
--- /dev/null
+++ b/go/vendor/github.com/inconshreveable/mousetrap/trap_windows.go
@@ -0,0 +1,98 @@
+// +build windows
+// +build !go1.4
+
+package mousetrap
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+const (
+	// defined by the Win32 API
+	th32cs_snapprocess uintptr = 0x2
+)
+
+var (
+	kernel                   = syscall.MustLoadDLL("kernel32.dll")
+	CreateToolhelp32Snapshot = kernel.MustFindProc("CreateToolhelp32Snapshot")
+	Process32First           = kernel.MustFindProc("Process32FirstW")
+	Process32Next            = kernel.MustFindProc("Process32NextW")
+)
+
+// ProcessEntry32 structure defined by the Win32 API
+type processEntry32 struct {
+	dwSize              uint32
+	cntUsage            uint32
+	th32ProcessID       uint32
+	th32DefaultHeapID   int
+	th32ModuleID        uint32
+	cntThreads          uint32
+	th32ParentProcessID uint32
+	pcPriClassBase      int32
+	dwFlags             uint32
+	szExeFile           [syscall.MAX_PATH]uint16
+}
+
+func getProcessEntry(pid int) (pe *processEntry32, err error) {
+	snapshot, _, e1 := CreateToolhelp32Snapshot.Call(th32cs_snapprocess, uintptr(0))
+	if snapshot == uintptr(syscall.InvalidHandle) {
+		err = fmt.Errorf("CreateToolhelp32Snapshot: %v", e1)
+		return
+	}
+	defer syscall.CloseHandle(syscall.Handle(snapshot))
+
+	var processEntry processEntry32
+	processEntry.dwSize = uint32(unsafe.Sizeof(processEntry))
+	ok, _, e1 := Process32First.Call(snapshot, uintptr(unsafe.Pointer(&processEntry)))
+	if ok == 0 {
+		err = fmt.Errorf("Process32First: %v", e1)
+		return
+	}
+
+	for {
+		if processEntry.th32ProcessID == uint32(pid) {
+			pe = &processEntry
+			return
+		}
+
+		ok, _, e1 = Process32Next.Call(snapshot, uintptr(unsafe.Pointer(&processEntry)))
+		if ok == 0 {
+			err = fmt.Errorf("Process32Next: %v", e1)
+			return
+		}
+	}
+}
+
+func getppid() (pid int, err error) {
+	pe, err := getProcessEntry(os.Getpid())
+	if err != nil {
+		return
+	}
+
+	pid = int(pe.th32ParentProcessID)
+	return
+}
+
+// StartedByExplorer returns true if the program was invoked by the user double-clicking
+// on the executable from explorer.exe
+//
+// It is conservative and returns false if any of the internal calls fail.
+// It does not guarantee that the program was run from a terminal. It only can tell you
+// whether it was launched from explorer.exe
+func StartedByExplorer() bool {
+	ppid, err := getppid()
+	if err != nil {
+		return false
+	}
+
+	pe, err := getProcessEntry(ppid)
+	if err != nil {
+		return false
+	}
+
+	name := syscall.UTF16ToString(pe.szExeFile[:])
+	return name == "explorer.exe"
+}
diff --git a/go/vendor/github.com/inconshreveable/mousetrap/trap_windows_1.4.go b/go/vendor/github.com/inconshreveable/mousetrap/trap_windows_1.4.go
new file mode 100644
index 0000000..9a28e57
--- /dev/null
+++ b/go/vendor/github.com/inconshreveable/mousetrap/trap_windows_1.4.go
@@ -0,0 +1,46 @@
+// +build windows
+// +build go1.4
+
+package mousetrap
+
+import (
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+func getProcessEntry(pid int) (*syscall.ProcessEntry32, error) {
+	snapshot, err := syscall.CreateToolhelp32Snapshot(syscall.TH32CS_SNAPPROCESS, 0)
+	if err != nil {
+		return nil, err
+	}
+	defer syscall.CloseHandle(snapshot)
+	var procEntry syscall.ProcessEntry32
+	procEntry.Size = uint32(unsafe.Sizeof(procEntry))
+	if err = syscall.Process32First(snapshot, &procEntry); err != nil {
+		return nil, err
+	}
+	for {
+		if procEntry.ProcessID == uint32(pid) {
+			return &procEntry, nil
+		}
+		err = syscall.Process32Next(snapshot, &procEntry)
+		if err != nil {
+			return nil, err
+		}
+	}
+}
+
+// StartedByExplorer returns true if the program was invoked by the user double-clicking
+// on the executable from explorer.exe
+//
+// It is conservative and returns false if any of the internal calls fail.
+// It does not guarantee that the program was run from a terminal. It only can tell you
+// whether it was launched from explorer.exe
+func StartedByExplorer() bool {
+	pe, err := getProcessEntry(os.Getppid())
+	if err != nil {
+		return false
+	}
+	return "explorer.exe" == syscall.UTF16ToString(pe.ExeFile[:])
+}
diff --git a/go/vendor/github.com/spf13/cobra/.gitignore b/go/vendor/github.com/spf13/cobra/.gitignore
new file mode 100644
index 0000000..1b8c7c2
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/.gitignore
@@ -0,0 +1,36 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+# Vim files https://github.com/github/gitignore/blob/master/Global/Vim.gitignore
+# swap
+[._]*.s[a-w][a-z]
+[._]s[a-w][a-z]
+# session
+Session.vim
+# temporary
+.netrwhist
+*~
+# auto-generated tag files
+tags
+
+*.exe
+
+cobra.test
diff --git a/go/vendor/github.com/spf13/cobra/.mailmap b/go/vendor/github.com/spf13/cobra/.mailmap
new file mode 100644
index 0000000..94ec530
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/.mailmap
@@ -0,0 +1,3 @@
+Steve Francia <steve.francia@gmail.com>
+Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
+Fabiano Franz <ffranz@redhat.com>                   <contact@fabianofranz.com>
diff --git a/go/vendor/github.com/spf13/cobra/.travis.yml b/go/vendor/github.com/spf13/cobra/.travis.yml
new file mode 100644
index 0000000..5afcb20
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/.travis.yml
@@ -0,0 +1,21 @@
+language: go
+
+matrix:
+  include:
+    - go: 1.9.4
+    - go: 1.10.0
+    - go: tip
+  allow_failures:
+    - go: tip
+
+before_install:
+  - mkdir -p bin
+  - curl -Lso bin/shellcheck https://github.com/caarlos0/shellcheck-docker/releases/download/v0.4.3/shellcheck
+  - chmod +x bin/shellcheck
+script:
+  - PATH=$PATH:$PWD/bin go test -v ./...
+  - go build
+  - diff -u <(echo -n) <(gofmt -d -s .)
+  - if [ -z $NOVET ]; then
+      diff -u <(echo -n) <(go tool vet . 2>&1 | grep -vE 'ExampleCommand|bash_completions.*Fprint');
+    fi
diff --git a/go/vendor/github.com/spf13/cobra/LICENSE.txt b/go/vendor/github.com/spf13/cobra/LICENSE.txt
new file mode 100644
index 0000000..298f0e2
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/LICENSE.txt
@@ -0,0 +1,174 @@
+                                Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
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+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
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+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
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+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
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+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
diff --git a/go/vendor/github.com/spf13/cobra/README.md b/go/vendor/github.com/spf13/cobra/README.md
new file mode 100644
index 0000000..851fcc0
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/README.md
@@ -0,0 +1,736 @@
+![cobra logo](https://cloud.githubusercontent.com/assets/173412/10886352/ad566232-814f-11e5-9cd0-aa101788c117.png)
+
+Cobra is both a library for creating powerful modern CLI applications as well as a program to generate applications and command files.
+
+Many of the most widely used Go projects are built using Cobra including:
+
+* [Kubernetes](http://kubernetes.io/)
+* [Hugo](http://gohugo.io)
+* [rkt](https://github.com/coreos/rkt)
+* [etcd](https://github.com/coreos/etcd)
+* [Moby (former Docker)](https://github.com/moby/moby)
+* [Docker (distribution)](https://github.com/docker/distribution)
+* [OpenShift](https://www.openshift.com/)
+* [Delve](https://github.com/derekparker/delve)
+* [GopherJS](http://www.gopherjs.org/)
+* [CockroachDB](http://www.cockroachlabs.com/)
+* [Bleve](http://www.blevesearch.com/)
+* [ProjectAtomic (enterprise)](http://www.projectatomic.io/)
+* [GiantSwarm's swarm](https://github.com/giantswarm/cli)
+* [Nanobox](https://github.com/nanobox-io/nanobox)/[Nanopack](https://github.com/nanopack)
+* [rclone](http://rclone.org/)
+* [nehm](https://github.com/bogem/nehm)
+* [Pouch](https://github.com/alibaba/pouch)
+
+[![Build Status](https://travis-ci.org/spf13/cobra.svg "Travis CI status")](https://travis-ci.org/spf13/cobra)
+[![CircleCI status](https://circleci.com/gh/spf13/cobra.png?circle-token=:circle-token "CircleCI status")](https://circleci.com/gh/spf13/cobra)
+[![GoDoc](https://godoc.org/github.com/spf13/cobra?status.svg)](https://godoc.org/github.com/spf13/cobra)
+
+# Table of Contents
+
+- [Overview](#overview)
+- [Concepts](#concepts)
+  * [Commands](#commands)
+  * [Flags](#flags)
+- [Installing](#installing)
+- [Getting Started](#getting-started)
+  * [Using the Cobra Generator](#using-the-cobra-generator)
+  * [Using the Cobra Library](#using-the-cobra-library)
+  * [Working with Flags](#working-with-flags)
+  * [Positional and Custom Arguments](#positional-and-custom-arguments)
+  * [Example](#example)
+  * [Help Command](#help-command)
+  * [Usage Message](#usage-message)
+  * [PreRun and PostRun Hooks](#prerun-and-postrun-hooks)
+  * [Suggestions when "unknown command" happens](#suggestions-when-unknown-command-happens)
+  * [Generating documentation for your command](#generating-documentation-for-your-command)
+  * [Generating bash completions](#generating-bash-completions)
+- [Contributing](#contributing)
+- [License](#license)
+
+# Overview
+
+Cobra is a library providing a simple interface to create powerful modern CLI
+interfaces similar to git & go tools.
+
+Cobra is also an application that will generate your application scaffolding to rapidly
+develop a Cobra-based application.
+
+Cobra provides:
+* Easy subcommand-based CLIs: `app server`, `app fetch`, etc.
+* Fully POSIX-compliant flags (including short & long versions)
+* Nested subcommands
+* Global, local and cascading flags
+* Easy generation of applications & commands with `cobra init appname` & `cobra add cmdname`
+* Intelligent suggestions (`app srver`... did you mean `app server`?)
+* Automatic help generation for commands and flags
+* Automatic help flag recognition of `-h`, `--help`, etc.
+* Automatically generated bash autocomplete for your application
+* Automatically generated man pages for your application
+* Command aliases so you can change things without breaking them
+* The flexibility to define your own help, usage, etc.
+* Optional tight integration with [viper](http://github.com/spf13/viper) for 12-factor apps
+
+# Concepts
+
+Cobra is built on a structure of commands, arguments & flags.
+
+**Commands** represent actions, **Args** are things and **Flags** are modifiers for those actions.
+
+The best applications will read like sentences when used. Users will know how
+to use the application because they will natively understand how to use it.
+
+The pattern to follow is
+`APPNAME VERB NOUN --ADJECTIVE.`
+    or
+`APPNAME COMMAND ARG --FLAG`
+
+A few good real world examples may better illustrate this point.
+
+In the following example, 'server' is a command, and 'port' is a flag:
+
+    hugo server --port=1313
+
+In this command we are telling Git to clone the url bare.
+
+    git clone URL --bare
+
+## Commands
+
+Command is the central point of the application. Each interaction that
+the application supports will be contained in a Command. A command can
+have children commands and optionally run an action.
+
+In the example above, 'server' is the command.
+
+[More about cobra.Command](https://godoc.org/github.com/spf13/cobra#Command)
+
+## Flags
+
+A flag is a way to modify the behavior of a command. Cobra supports
+fully POSIX-compliant flags as well as the Go [flag package](https://golang.org/pkg/flag/).
+A Cobra command can define flags that persist through to children commands
+and flags that are only available to that command.
+
+In the example above, 'port' is the flag.
+
+Flag functionality is provided by the [pflag
+library](https://github.com/spf13/pflag), a fork of the flag standard library
+which maintains the same interface while adding POSIX compliance.
+
+# Installing
+Using Cobra is easy. First, use `go get` to install the latest version
+of the library. This command will install the `cobra` generator executable
+along with the library and its dependencies:
+
+    go get -u github.com/spf13/cobra/cobra
+
+Next, include Cobra in your application:
+
+```go
+import "github.com/spf13/cobra"
+```
+
+# Getting Started
+
+While you are welcome to provide your own organization, typically a Cobra-based
+application will follow the following organizational structure:
+
+```
+  ▾ appName/
+    ▾ cmd/
+        add.go
+        your.go
+        commands.go
+        here.go
+      main.go
+```
+
+In a Cobra app, typically the main.go file is very bare. It serves one purpose: initializing Cobra.
+
+```go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "{pathToYourApp}/cmd"
+)
+
+func main() {
+  cmd.Execute()
+}
+```
+
+## Using the Cobra Generator
+
+Cobra provides its own program that will create your application and add any
+commands you want. It's the easiest way to incorporate Cobra into your application.
+
+[Here](https://github.com/spf13/cobra/blob/master/cobra/README.md) you can find more information about it.
+
+## Using the Cobra Library
+
+To manually implement Cobra you need to create a bare main.go file and a rootCmd file.
+You will optionally provide additional commands as you see fit.
+
+### Create rootCmd
+
+Cobra doesn't require any special constructors. Simply create your commands.
+
+Ideally you place this in app/cmd/root.go:
+
+```go
+var rootCmd = &cobra.Command{
+  Use:   "hugo",
+  Short: "Hugo is a very fast static site generator",
+  Long: `A Fast and Flexible Static Site Generator built with
+                love by spf13 and friends in Go.
+                Complete documentation is available at http://hugo.spf13.com`,
+  Run: func(cmd *cobra.Command, args []string) {
+    // Do Stuff Here
+  },
+}
+
+func Execute() {
+  if err := rootCmd.Execute(); err != nil {
+    fmt.Println(err)
+    os.Exit(1)
+  }
+}
+```
+
+You will additionally define flags and handle configuration in your init() function.
+
+For example cmd/root.go:
+
+```go
+import (
+  "fmt"
+  "os"
+
+  homedir "github.com/mitchellh/go-homedir"
+  "github.com/spf13/cobra"
+  "github.com/spf13/viper"
+)
+
+func init() {
+  cobra.OnInitialize(initConfig)
+  rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cobra.yaml)")
+  rootCmd.PersistentFlags().StringVarP(&projectBase, "projectbase", "b", "", "base project directory eg. github.com/spf13/")
+  rootCmd.PersistentFlags().StringP("author", "a", "YOUR NAME", "Author name for copyright attribution")
+  rootCmd.PersistentFlags().StringVarP(&userLicense, "license", "l", "", "Name of license for the project (can provide `licensetext` in config)")
+  rootCmd.PersistentFlags().Bool("viper", true, "Use Viper for configuration")
+  viper.BindPFlag("author", rootCmd.PersistentFlags().Lookup("author"))
+  viper.BindPFlag("projectbase", rootCmd.PersistentFlags().Lookup("projectbase"))
+  viper.BindPFlag("useViper", rootCmd.PersistentFlags().Lookup("viper"))
+  viper.SetDefault("author", "NAME HERE <EMAIL ADDRESS>")
+  viper.SetDefault("license", "apache")
+}
+
+func initConfig() {
+  // Don't forget to read config either from cfgFile or from home directory!
+  if cfgFile != "" {
+    // Use config file from the flag.
+    viper.SetConfigFile(cfgFile)
+  } else {
+    // Find home directory.
+    home, err := homedir.Dir()
+    if err != nil {
+      fmt.Println(err)
+      os.Exit(1)
+    }
+
+    // Search config in home directory with name ".cobra" (without extension).
+    viper.AddConfigPath(home)
+    viper.SetConfigName(".cobra")
+  }
+
+  if err := viper.ReadInConfig(); err != nil {
+    fmt.Println("Can't read config:", err)
+    os.Exit(1)
+  }
+}
+```
+
+### Create your main.go
+
+With the root command you need to have your main function execute it.
+Execute should be run on the root for clarity, though it can be called on any command.
+
+In a Cobra app, typically the main.go file is very bare. It serves, one purpose, to initialize Cobra.
+
+```go
+package main
+
+import (
+  "fmt"
+  "os"
+
+  "{pathToYourApp}/cmd"
+)
+
+func main() {
+  cmd.Execute()
+}
+```
+
+### Create additional commands
+
+Additional commands can be defined and typically are each given their own file
+inside of the cmd/ directory.
+
+If you wanted to create a version command you would create cmd/version.go and
+populate it with the following:
+
+```go
+package cmd
+
+import (
+  "fmt"
+
+  "github.com/spf13/cobra"
+)
+
+func init() {
+  rootCmd.AddCommand(versionCmd)
+}
+
+var versionCmd = &cobra.Command{
+  Use:   "version",
+  Short: "Print the version number of Hugo",
+  Long:  `All software has versions. This is Hugo's`,
+  Run: func(cmd *cobra.Command, args []string) {
+    fmt.Println("Hugo Static Site Generator v0.9 -- HEAD")
+  },
+}
+```
+
+## Working with Flags
+
+Flags provide modifiers to control how the action command operates.
+
+### Assign flags to a command
+
+Since the flags are defined and used in different locations, we need to
+define a variable outside with the correct scope to assign the flag to
+work with.
+
+```go
+var Verbose bool
+var Source string
+```
+
+There are two different approaches to assign a flag.
+
+### Persistent Flags
+
+A flag can be 'persistent' meaning that this flag will be available to the
+command it's assigned to as well as every command under that command. For
+global flags, assign a flag as a persistent flag on the root.
+
+```go
+rootCmd.PersistentFlags().BoolVarP(&Verbose, "verbose", "v", false, "verbose output")
+```
+
+### Local Flags
+
+A flag can also be assigned locally which will only apply to that specific command.
+
+```go
+rootCmd.Flags().StringVarP(&Source, "source", "s", "", "Source directory to read from")
+```
+
+### Local Flag on Parent Commands
+
+By default Cobra only parses local flags on the target command, any local flags on
+parent commands are ignored. By enabling `Command.TraverseChildren` Cobra will
+parse local flags on each command before executing the target command.
+
+```go
+command := cobra.Command{
+  Use: "print [OPTIONS] [COMMANDS]",
+  TraverseChildren: true,
+}
+```
+
+### Bind Flags with Config
+
+You can also bind your flags with [viper](https://github.com/spf13/viper):
+```go
+var author string
+
+func init() {
+  rootCmd.PersistentFlags().StringVar(&author, "author", "YOUR NAME", "Author name for copyright attribution")
+  viper.BindPFlag("author", rootCmd.PersistentFlags().Lookup("author"))
+}
+```
+
+In this example the persistent flag `author` is bound with `viper`.
+**Note**, that the variable `author` will not be set to the value from config,
+when the `--author` flag is not provided by user.
+
+More in [viper documentation](https://github.com/spf13/viper#working-with-flags).
+
+### Required flags
+
+Flags are optional by default. If instead you wish your command to report an error
+when a flag has not been set, mark it as required:
+```go
+rootCmd.Flags().StringVarP(&Region, "region", "r", "", "AWS region (required)")
+rootCmd.MarkFlagRequired("region")
+```
+
+## Positional and Custom Arguments
+
+Validation of positional arguments can be specified using the `Args` field
+of `Command`.
+
+The following validators are built in:
+
+- `NoArgs` - the command will report an error if there are any positional args.
+- `ArbitraryArgs` - the command will accept any args.
+- `OnlyValidArgs` - the command will report an error if there are any positional args that are not in the `ValidArgs` field of `Command`.
+- `MinimumNArgs(int)` - the command will report an error if there are not at least N positional args.
+- `MaximumNArgs(int)` - the command will report an error if there are more than N positional args.
+- `ExactArgs(int)` - the command will report an error if there are not exactly N positional args.
+- `RangeArgs(min, max)` - the command will report an error if the number of args is not between the minimum and maximum number of expected args.
+
+An example of setting the custom validator:
+
+```go
+var cmd = &cobra.Command{
+  Short: "hello",
+  Args: func(cmd *cobra.Command, args []string) error {
+    if len(args) < 1 {
+      return errors.New("requires at least one arg")
+    }
+    if myapp.IsValidColor(args[0]) {
+      return nil
+    }
+    return fmt.Errorf("invalid color specified: %s", args[0])
+  },
+  Run: func(cmd *cobra.Command, args []string) {
+    fmt.Println("Hello, World!")
+  },
+}
+```
+
+## Example
+
+In the example below, we have defined three commands. Two are at the top level
+and one (cmdTimes) is a child of one of the top commands. In this case the root
+is not executable meaning that a subcommand is required. This is accomplished
+by not providing a 'Run' for the 'rootCmd'.
+
+We have only defined one flag for a single command.
+
+More documentation about flags is available at https://github.com/spf13/pflag
+
+```go
+package main
+
+import (
+  "fmt"
+  "strings"
+
+  "github.com/spf13/cobra"
+)
+
+func main() {
+  var echoTimes int
+
+  var cmdPrint = &cobra.Command{
+    Use:   "print [string to print]",
+    Short: "Print anything to the screen",
+    Long: `print is for printing anything back to the screen.
+For many years people have printed back to the screen.`,
+    Args: cobra.MinimumNArgs(1),
+    Run: func(cmd *cobra.Command, args []string) {
+      fmt.Println("Print: " + strings.Join(args, " "))
+    },
+  }
+
+  var cmdEcho = &cobra.Command{
+    Use:   "echo [string to echo]",
+    Short: "Echo anything to the screen",
+    Long: `echo is for echoing anything back.
+Echo works a lot like print, except it has a child command.`,
+    Args: cobra.MinimumNArgs(1),
+    Run: func(cmd *cobra.Command, args []string) {
+      fmt.Println("Print: " + strings.Join(args, " "))
+    },
+  }
+
+  var cmdTimes = &cobra.Command{
+    Use:   "times [# times] [string to echo]",
+    Short: "Echo anything to the screen more times",
+    Long: `echo things multiple times back to the user by providing
+a count and a string.`,
+    Args: cobra.MinimumNArgs(1),
+    Run: func(cmd *cobra.Command, args []string) {
+      for i := 0; i < echoTimes; i++ {
+        fmt.Println("Echo: " + strings.Join(args, " "))
+      }
+    },
+  }
+
+  cmdTimes.Flags().IntVarP(&echoTimes, "times", "t", 1, "times to echo the input")
+
+  var rootCmd = &cobra.Command{Use: "app"}
+  rootCmd.AddCommand(cmdPrint, cmdEcho)
+  cmdEcho.AddCommand(cmdTimes)
+  rootCmd.Execute()
+}
+```
+
+For a more complete example of a larger application, please checkout [Hugo](http://gohugo.io/).
+
+## Help Command
+
+Cobra automatically adds a help command to your application when you have subcommands.
+This will be called when a user runs 'app help'. Additionally, help will also
+support all other commands as input. Say, for instance, you have a command called
+'create' without any additional configuration; Cobra will work when 'app help
+create' is called.  Every command will automatically have the '--help' flag added.
+
+### Example
+
+The following output is automatically generated by Cobra. Nothing beyond the
+command and flag definitions are needed.
+
+    $ cobra help
+
+    Cobra is a CLI library for Go that empowers applications.
+    This application is a tool to generate the needed files
+    to quickly create a Cobra application.
+
+    Usage:
+      cobra [command]
+
+    Available Commands:
+      add         Add a command to a Cobra Application
+      help        Help about any command
+      init        Initialize a Cobra Application
+
+    Flags:
+      -a, --author string    author name for copyright attribution (default "YOUR NAME")
+          --config string    config file (default is $HOME/.cobra.yaml)
+      -h, --help             help for cobra
+      -l, --license string   name of license for the project
+          --viper            use Viper for configuration (default true)
+
+    Use "cobra [command] --help" for more information about a command.
+
+
+Help is just a command like any other. There is no special logic or behavior
+around it. In fact, you can provide your own if you want.
+
+### Defining your own help
+
+You can provide your own Help command or your own template for the default command to use
+with following functions:
+
+```go
+cmd.SetHelpCommand(cmd *Command)
+cmd.SetHelpFunc(f func(*Command, []string))
+cmd.SetHelpTemplate(s string)
+```
+
+The latter two will also apply to any children commands.
+
+## Usage Message
+
+When the user provides an invalid flag or invalid command, Cobra responds by
+showing the user the 'usage'.
+
+### Example
+You may recognize this from the help above. That's because the default help
+embeds the usage as part of its output.
+
+    $ cobra --invalid
+    Error: unknown flag: --invalid
+    Usage:
+      cobra [command]
+
+    Available Commands:
+      add         Add a command to a Cobra Application
+      help        Help about any command
+      init        Initialize a Cobra Application
+
+    Flags:
+      -a, --author string    author name for copyright attribution (default "YOUR NAME")
+          --config string    config file (default is $HOME/.cobra.yaml)
+      -h, --help             help for cobra
+      -l, --license string   name of license for the project
+          --viper            use Viper for configuration (default true)
+
+    Use "cobra [command] --help" for more information about a command.
+
+### Defining your own usage
+You can provide your own usage function or template for Cobra to use.
+Like help, the function and template are overridable through public methods:
+
+```go
+cmd.SetUsageFunc(f func(*Command) error)
+cmd.SetUsageTemplate(s string)
+```
+
+## Version Flag
+
+Cobra adds a top-level '--version' flag if the Version field is set on the root command.
+Running an application with the '--version' flag will print the version to stdout using
+the version template. The template can be customized using the
+`cmd.SetVersionTemplate(s string)` function.
+
+## PreRun and PostRun Hooks
+
+It is possible to run functions before or after the main `Run` function of your command. The `PersistentPreRun` and `PreRun` functions will be executed before `Run`. `PersistentPostRun` and `PostRun` will be executed after `Run`.  The `Persistent*Run` functions will be inherited by children if they do not declare their own.  These functions are run in the following order:
+
+- `PersistentPreRun`
+- `PreRun`
+- `Run`
+- `PostRun`
+- `PersistentPostRun`
+
+An example of two commands which use all of these features is below.  When the subcommand is executed, it will run the root command's `PersistentPreRun` but not the root command's `PersistentPostRun`:
+
+```go
+package main
+
+import (
+  "fmt"
+
+  "github.com/spf13/cobra"
+)
+
+func main() {
+
+  var rootCmd = &cobra.Command{
+    Use:   "root [sub]",
+    Short: "My root command",
+    PersistentPreRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside rootCmd PersistentPreRun with args: %v\n", args)
+    },
+    PreRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside rootCmd PreRun with args: %v\n", args)
+    },
+    Run: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside rootCmd Run with args: %v\n", args)
+    },
+    PostRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside rootCmd PostRun with args: %v\n", args)
+    },
+    PersistentPostRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside rootCmd PersistentPostRun with args: %v\n", args)
+    },
+  }
+
+  var subCmd = &cobra.Command{
+    Use:   "sub [no options!]",
+    Short: "My subcommand",
+    PreRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside subCmd PreRun with args: %v\n", args)
+    },
+    Run: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside subCmd Run with args: %v\n", args)
+    },
+    PostRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside subCmd PostRun with args: %v\n", args)
+    },
+    PersistentPostRun: func(cmd *cobra.Command, args []string) {
+      fmt.Printf("Inside subCmd PersistentPostRun with args: %v\n", args)
+    },
+  }
+
+  rootCmd.AddCommand(subCmd)
+
+  rootCmd.SetArgs([]string{""})
+  rootCmd.Execute()
+  fmt.Println()
+  rootCmd.SetArgs([]string{"sub", "arg1", "arg2"})
+  rootCmd.Execute()
+}
+```
+
+Output:
+```
+Inside rootCmd PersistentPreRun with args: []
+Inside rootCmd PreRun with args: []
+Inside rootCmd Run with args: []
+Inside rootCmd PostRun with args: []
+Inside rootCmd PersistentPostRun with args: []
+
+Inside rootCmd PersistentPreRun with args: [arg1 arg2]
+Inside subCmd PreRun with args: [arg1 arg2]
+Inside subCmd Run with args: [arg1 arg2]
+Inside subCmd PostRun with args: [arg1 arg2]
+Inside subCmd PersistentPostRun with args: [arg1 arg2]
+```
+
+## Suggestions when "unknown command" happens
+
+Cobra will print automatic suggestions when "unknown command" errors happen. This allows Cobra to behave similarly to the `git` command when a typo happens. For example:
+
+```
+$ hugo srever
+Error: unknown command "srever" for "hugo"
+
+Did you mean this?
+        server
+
+Run 'hugo --help' for usage.
+```
+
+Suggestions are automatic based on every subcommand registered and use an implementation of [Levenshtein distance](http://en.wikipedia.org/wiki/Levenshtein_distance). Every registered command that matches a minimum distance of 2 (ignoring case) will be displayed as a suggestion.
+
+If you need to disable suggestions or tweak the string distance in your command, use:
+
+```go
+command.DisableSuggestions = true
+```
+
+or
+
+```go
+command.SuggestionsMinimumDistance = 1
+```
+
+You can also explicitly set names for which a given command will be suggested using the `SuggestFor` attribute. This allows suggestions for strings that are not close in terms of string distance, but makes sense in your set of commands and for some which you don't want aliases. Example:
+
+```
+$ kubectl remove
+Error: unknown command "remove" for "kubectl"
+
+Did you mean this?
+        delete
+
+Run 'kubectl help' for usage.
+```
+
+## Generating documentation for your command
+
+Cobra can generate documentation based on subcommands, flags, etc. in the following formats:
+
+- [Markdown](doc/md_docs.md)
+- [ReStructured Text](doc/rest_docs.md)
+- [Man Page](doc/man_docs.md)
+
+## Generating bash completions
+
+Cobra can generate a bash-completion file. If you add more information to your command, these completions can be amazingly powerful and flexible.  Read more about it in [Bash Completions](bash_completions.md).
+
+# Contributing
+
+1. Fork it
+2. Download your fork to your PC (`git clone https://github.com/your_username/cobra && cd cobra`)
+3. Create your feature branch (`git checkout -b my-new-feature`)
+4. Make changes and add them (`git add .`)
+5. Commit your changes (`git commit -m 'Add some feature'`)
+6. Push to the branch (`git push origin my-new-feature`)
+7. Create new pull request
+
+# License
+
+Cobra is released under the Apache 2.0 license. See [LICENSE.txt](https://github.com/spf13/cobra/blob/master/LICENSE.txt)
diff --git a/go/vendor/github.com/spf13/cobra/args.go b/go/vendor/github.com/spf13/cobra/args.go
new file mode 100644
index 0000000..a5d8a92
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/args.go
@@ -0,0 +1,89 @@
+package cobra
+
+import (
+	"fmt"
+)
+
+type PositionalArgs func(cmd *Command, args []string) error
+
+// Legacy arg validation has the following behaviour:
+// - root commands with no subcommands can take arbitrary arguments
+// - root commands with subcommands will do subcommand validity checking
+// - subcommands will always accept arbitrary arguments
+func legacyArgs(cmd *Command, args []string) error {
+	// no subcommand, always take args
+	if !cmd.HasSubCommands() {
+		return nil
+	}
+
+	// root command with subcommands, do subcommand checking.
+	if !cmd.HasParent() && len(args) > 0 {
+		return fmt.Errorf("unknown command %q for %q%s", args[0], cmd.CommandPath(), cmd.findSuggestions(args[0]))
+	}
+	return nil
+}
+
+// NoArgs returns an error if any args are included.
+func NoArgs(cmd *Command, args []string) error {
+	if len(args) > 0 {
+		return fmt.Errorf("unknown command %q for %q", args[0], cmd.CommandPath())
+	}
+	return nil
+}
+
+// OnlyValidArgs returns an error if any args are not in the list of ValidArgs.
+func OnlyValidArgs(cmd *Command, args []string) error {
+	if len(cmd.ValidArgs) > 0 {
+		for _, v := range args {
+			if !stringInSlice(v, cmd.ValidArgs) {
+				return fmt.Errorf("invalid argument %q for %q%s", v, cmd.CommandPath(), cmd.findSuggestions(args[0]))
+			}
+		}
+	}
+	return nil
+}
+
+// ArbitraryArgs never returns an error.
+func ArbitraryArgs(cmd *Command, args []string) error {
+	return nil
+}
+
+// MinimumNArgs returns an error if there is not at least N args.
+func MinimumNArgs(n int) PositionalArgs {
+	return func(cmd *Command, args []string) error {
+		if len(args) < n {
+			return fmt.Errorf("requires at least %d arg(s), only received %d", n, len(args))
+		}
+		return nil
+	}
+}
+
+// MaximumNArgs returns an error if there are more than N args.
+func MaximumNArgs(n int) PositionalArgs {
+	return func(cmd *Command, args []string) error {
+		if len(args) > n {
+			return fmt.Errorf("accepts at most %d arg(s), received %d", n, len(args))
+		}
+		return nil
+	}
+}
+
+// ExactArgs returns an error if there are not exactly n args.
+func ExactArgs(n int) PositionalArgs {
+	return func(cmd *Command, args []string) error {
+		if len(args) != n {
+			return fmt.Errorf("accepts %d arg(s), received %d", n, len(args))
+		}
+		return nil
+	}
+}
+
+// RangeArgs returns an error if the number of args is not within the expected range.
+func RangeArgs(min int, max int) PositionalArgs {
+	return func(cmd *Command, args []string) error {
+		if len(args) < min || len(args) > max {
+			return fmt.Errorf("accepts between %d and %d arg(s), received %d", min, max, len(args))
+		}
+		return nil
+	}
+}
diff --git a/go/vendor/github.com/spf13/cobra/bash_completions.go b/go/vendor/github.com/spf13/cobra/bash_completions.go
new file mode 100644
index 0000000..8fa8f48
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/bash_completions.go
@@ -0,0 +1,584 @@
+package cobra
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"sort"
+	"strings"
+
+	"github.com/spf13/pflag"
+)
+
+// Annotations for Bash completion.
+const (
+	BashCompFilenameExt     = "cobra_annotation_bash_completion_filename_extensions"
+	BashCompCustom          = "cobra_annotation_bash_completion_custom"
+	BashCompOneRequiredFlag = "cobra_annotation_bash_completion_one_required_flag"
+	BashCompSubdirsInDir    = "cobra_annotation_bash_completion_subdirs_in_dir"
+)
+
+func writePreamble(buf *bytes.Buffer, name string) {
+	buf.WriteString(fmt.Sprintf("# bash completion for %-36s -*- shell-script -*-\n", name))
+	buf.WriteString(fmt.Sprintf(`
+__%[1]s_debug()
+{
+    if [[ -n ${BASH_COMP_DEBUG_FILE} ]]; then
+        echo "$*" >> "${BASH_COMP_DEBUG_FILE}"
+    fi
+}
+
+# Homebrew on Macs have version 1.3 of bash-completion which doesn't include
+# _init_completion. This is a very minimal version of that function.
+__%[1]s_init_completion()
+{
+    COMPREPLY=()
+    _get_comp_words_by_ref "$@" cur prev words cword
+}
+
+__%[1]s_index_of_word()
+{
+    local w word=$1
+    shift
+    index=0
+    for w in "$@"; do
+        [[ $w = "$word" ]] && return
+        index=$((index+1))
+    done
+    index=-1
+}
+
+__%[1]s_contains_word()
+{
+    local w word=$1; shift
+    for w in "$@"; do
+        [[ $w = "$word" ]] && return
+    done
+    return 1
+}
+
+__%[1]s_handle_reply()
+{
+    __%[1]s_debug "${FUNCNAME[0]}"
+    case $cur in
+        -*)
+            if [[ $(type -t compopt) = "builtin" ]]; then
+                compopt -o nospace
+            fi
+            local allflags
+            if [ ${#must_have_one_flag[@]} -ne 0 ]; then
+                allflags=("${must_have_one_flag[@]}")
+            else
+                allflags=("${flags[*]} ${two_word_flags[*]}")
+            fi
+            COMPREPLY=( $(compgen -W "${allflags[*]}" -- "$cur") )
+            if [[ $(type -t compopt) = "builtin" ]]; then
+                [[ "${COMPREPLY[0]}" == *= ]] || compopt +o nospace
+            fi
+
+            # complete after --flag=abc
+            if [[ $cur == *=* ]]; then
+                if [[ $(type -t compopt) = "builtin" ]]; then
+                    compopt +o nospace
+                fi
+
+                local index flag
+                flag="${cur%%=*}"
+                __%[1]s_index_of_word "${flag}" "${flags_with_completion[@]}"
+                COMPREPLY=()
+                if [[ ${index} -ge 0 ]]; then
+                    PREFIX=""
+                    cur="${cur#*=}"
+                    ${flags_completion[${index}]}
+                    if [ -n "${ZSH_VERSION}" ]; then
+                        # zsh completion needs --flag= prefix
+                        eval "COMPREPLY=( \"\${COMPREPLY[@]/#/${flag}=}\" )"
+                    fi
+                fi
+            fi
+            return 0;
+            ;;
+    esac
+
+    # check if we are handling a flag with special work handling
+    local index
+    __%[1]s_index_of_word "${prev}" "${flags_with_completion[@]}"
+    if [[ ${index} -ge 0 ]]; then
+        ${flags_completion[${index}]}
+        return
+    fi
+
+    # we are parsing a flag and don't have a special handler, no completion
+    if [[ ${cur} != "${words[cword]}" ]]; then
+        return
+    fi
+
+    local completions
+    completions=("${commands[@]}")
+    if [[ ${#must_have_one_noun[@]} -ne 0 ]]; then
+        completions=("${must_have_one_noun[@]}")
+    fi
+    if [[ ${#must_have_one_flag[@]} -ne 0 ]]; then
+        completions+=("${must_have_one_flag[@]}")
+    fi
+    COMPREPLY=( $(compgen -W "${completions[*]}" -- "$cur") )
+
+    if [[ ${#COMPREPLY[@]} -eq 0 && ${#noun_aliases[@]} -gt 0 && ${#must_have_one_noun[@]} -ne 0 ]]; then
+        COMPREPLY=( $(compgen -W "${noun_aliases[*]}" -- "$cur") )
+    fi
+
+    if [[ ${#COMPREPLY[@]} -eq 0 ]]; then
+        declare -F __custom_func >/dev/null && __custom_func
+    fi
+
+    # available in bash-completion >= 2, not always present on macOS
+    if declare -F __ltrim_colon_completions >/dev/null; then
+        __ltrim_colon_completions "$cur"
+    fi
+
+    # If there is only 1 completion and it is a flag with an = it will be completed
+    # but we don't want a space after the =
+    if [[ "${#COMPREPLY[@]}" -eq "1" ]] && [[ $(type -t compopt) = "builtin" ]] && [[ "${COMPREPLY[0]}" == --*= ]]; then
+       compopt -o nospace
+    fi
+}
+
+# The arguments should be in the form "ext1|ext2|extn"
+__%[1]s_handle_filename_extension_flag()
+{
+    local ext="$1"
+    _filedir "@(${ext})"
+}
+
+__%[1]s_handle_subdirs_in_dir_flag()
+{
+    local dir="$1"
+    pushd "${dir}" >/dev/null 2>&1 && _filedir -d && popd >/dev/null 2>&1
+}
+
+__%[1]s_handle_flag()
+{
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    # if a command required a flag, and we found it, unset must_have_one_flag()
+    local flagname=${words[c]}
+    local flagvalue
+    # if the word contained an =
+    if [[ ${words[c]} == *"="* ]]; then
+        flagvalue=${flagname#*=} # take in as flagvalue after the =
+        flagname=${flagname%%=*} # strip everything after the =
+        flagname="${flagname}=" # but put the = back
+    fi
+    __%[1]s_debug "${FUNCNAME[0]}: looking for ${flagname}"
+    if __%[1]s_contains_word "${flagname}" "${must_have_one_flag[@]}"; then
+        must_have_one_flag=()
+    fi
+
+    # if you set a flag which only applies to this command, don't show subcommands
+    if __%[1]s_contains_word "${flagname}" "${local_nonpersistent_flags[@]}"; then
+      commands=()
+    fi
+
+    # keep flag value with flagname as flaghash
+    # flaghash variable is an associative array which is only supported in bash > 3.
+    if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then
+        if [ -n "${flagvalue}" ] ; then
+            flaghash[${flagname}]=${flagvalue}
+        elif [ -n "${words[ $((c+1)) ]}" ] ; then
+            flaghash[${flagname}]=${words[ $((c+1)) ]}
+        else
+            flaghash[${flagname}]="true" # pad "true" for bool flag
+        fi
+    fi
+
+    # skip the argument to a two word flag
+    if __%[1]s_contains_word "${words[c]}" "${two_word_flags[@]}"; then
+        c=$((c+1))
+        # if we are looking for a flags value, don't show commands
+        if [[ $c -eq $cword ]]; then
+            commands=()
+        fi
+    fi
+
+    c=$((c+1))
+
+}
+
+__%[1]s_handle_noun()
+{
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    if __%[1]s_contains_word "${words[c]}" "${must_have_one_noun[@]}"; then
+        must_have_one_noun=()
+    elif __%[1]s_contains_word "${words[c]}" "${noun_aliases[@]}"; then
+        must_have_one_noun=()
+    fi
+
+    nouns+=("${words[c]}")
+    c=$((c+1))
+}
+
+__%[1]s_handle_command()
+{
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    local next_command
+    if [[ -n ${last_command} ]]; then
+        next_command="_${last_command}_${words[c]//:/__}"
+    else
+        if [[ $c -eq 0 ]]; then
+            next_command="_%[1]s_root_command"
+        else
+            next_command="_${words[c]//:/__}"
+        fi
+    fi
+    c=$((c+1))
+    __%[1]s_debug "${FUNCNAME[0]}: looking for ${next_command}"
+    declare -F "$next_command" >/dev/null && $next_command
+}
+
+__%[1]s_handle_word()
+{
+    if [[ $c -ge $cword ]]; then
+        __%[1]s_handle_reply
+        return
+    fi
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+    if [[ "${words[c]}" == -* ]]; then
+        __%[1]s_handle_flag
+    elif __%[1]s_contains_word "${words[c]}" "${commands[@]}"; then
+        __%[1]s_handle_command
+    elif [[ $c -eq 0 ]]; then
+        __%[1]s_handle_command
+    elif __%[1]s_contains_word "${words[c]}" "${command_aliases[@]}"; then
+        # aliashash variable is an associative array which is only supported in bash > 3.
+        if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then
+            words[c]=${aliashash[${words[c]}]}
+            __%[1]s_handle_command
+        else
+            __%[1]s_handle_noun
+        fi
+    else
+        __%[1]s_handle_noun
+    fi
+    __%[1]s_handle_word
+}
+
+`, name))
+}
+
+func writePostscript(buf *bytes.Buffer, name string) {
+	name = strings.Replace(name, ":", "__", -1)
+	buf.WriteString(fmt.Sprintf("__start_%s()\n", name))
+	buf.WriteString(fmt.Sprintf(`{
+    local cur prev words cword
+    declare -A flaghash 2>/dev/null || :
+    declare -A aliashash 2>/dev/null || :
+    if declare -F _init_completion >/dev/null 2>&1; then
+        _init_completion -s || return
+    else
+        __%[1]s_init_completion -n "=" || return
+    fi
+
+    local c=0
+    local flags=()
+    local two_word_flags=()
+    local local_nonpersistent_flags=()
+    local flags_with_completion=()
+    local flags_completion=()
+    local commands=("%[1]s")
+    local must_have_one_flag=()
+    local must_have_one_noun=()
+    local last_command
+    local nouns=()
+
+    __%[1]s_handle_word
+}
+
+`, name))
+	buf.WriteString(fmt.Sprintf(`if [[ $(type -t compopt) = "builtin" ]]; then
+    complete -o default -F __start_%s %s
+else
+    complete -o default -o nospace -F __start_%s %s
+fi
+
+`, name, name, name, name))
+	buf.WriteString("# ex: ts=4 sw=4 et filetype=sh\n")
+}
+
+func writeCommands(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    commands=()\n")
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c == cmd.helpCommand {
+			continue
+		}
+		buf.WriteString(fmt.Sprintf("    commands+=(%q)\n", c.Name()))
+		writeCmdAliases(buf, c)
+	}
+	buf.WriteString("\n")
+}
+
+func writeFlagHandler(buf *bytes.Buffer, name string, annotations map[string][]string, cmd *Command) {
+	for key, value := range annotations {
+		switch key {
+		case BashCompFilenameExt:
+			buf.WriteString(fmt.Sprintf("    flags_with_completion+=(%q)\n", name))
+
+			var ext string
+			if len(value) > 0 {
+				ext = fmt.Sprintf("__%s_handle_filename_extension_flag ", cmd.Root().Name()) + strings.Join(value, "|")
+			} else {
+				ext = "_filedir"
+			}
+			buf.WriteString(fmt.Sprintf("    flags_completion+=(%q)\n", ext))
+		case BashCompCustom:
+			buf.WriteString(fmt.Sprintf("    flags_with_completion+=(%q)\n", name))
+			if len(value) > 0 {
+				handlers := strings.Join(value, "; ")
+				buf.WriteString(fmt.Sprintf("    flags_completion+=(%q)\n", handlers))
+			} else {
+				buf.WriteString("    flags_completion+=(:)\n")
+			}
+		case BashCompSubdirsInDir:
+			buf.WriteString(fmt.Sprintf("    flags_with_completion+=(%q)\n", name))
+
+			var ext string
+			if len(value) == 1 {
+				ext = fmt.Sprintf("__%s_handle_subdirs_in_dir_flag ", cmd.Root().Name()) + value[0]
+			} else {
+				ext = "_filedir -d"
+			}
+			buf.WriteString(fmt.Sprintf("    flags_completion+=(%q)\n", ext))
+		}
+	}
+}
+
+func writeShortFlag(buf *bytes.Buffer, flag *pflag.Flag, cmd *Command) {
+	name := flag.Shorthand
+	format := "    "
+	if len(flag.NoOptDefVal) == 0 {
+		format += "two_word_"
+	}
+	format += "flags+=(\"-%s\")\n"
+	buf.WriteString(fmt.Sprintf(format, name))
+	writeFlagHandler(buf, "-"+name, flag.Annotations, cmd)
+}
+
+func writeFlag(buf *bytes.Buffer, flag *pflag.Flag, cmd *Command) {
+	name := flag.Name
+	format := "    flags+=(\"--%s"
+	if len(flag.NoOptDefVal) == 0 {
+		format += "="
+	}
+	format += "\")\n"
+	buf.WriteString(fmt.Sprintf(format, name))
+	writeFlagHandler(buf, "--"+name, flag.Annotations, cmd)
+}
+
+func writeLocalNonPersistentFlag(buf *bytes.Buffer, flag *pflag.Flag) {
+	name := flag.Name
+	format := "    local_nonpersistent_flags+=(\"--%s"
+	if len(flag.NoOptDefVal) == 0 {
+		format += "="
+	}
+	format += "\")\n"
+	buf.WriteString(fmt.Sprintf(format, name))
+}
+
+func writeFlags(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString(`    flags=()
+    two_word_flags=()
+    local_nonpersistent_flags=()
+    flags_with_completion=()
+    flags_completion=()
+
+`)
+	localNonPersistentFlags := cmd.LocalNonPersistentFlags()
+	cmd.NonInheritedFlags().VisitAll(func(flag *pflag.Flag) {
+		if nonCompletableFlag(flag) {
+			return
+		}
+		writeFlag(buf, flag, cmd)
+		if len(flag.Shorthand) > 0 {
+			writeShortFlag(buf, flag, cmd)
+		}
+		if localNonPersistentFlags.Lookup(flag.Name) != nil {
+			writeLocalNonPersistentFlag(buf, flag)
+		}
+	})
+	cmd.InheritedFlags().VisitAll(func(flag *pflag.Flag) {
+		if nonCompletableFlag(flag) {
+			return
+		}
+		writeFlag(buf, flag, cmd)
+		if len(flag.Shorthand) > 0 {
+			writeShortFlag(buf, flag, cmd)
+		}
+	})
+
+	buf.WriteString("\n")
+}
+
+func writeRequiredFlag(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    must_have_one_flag=()\n")
+	flags := cmd.NonInheritedFlags()
+	flags.VisitAll(func(flag *pflag.Flag) {
+		if nonCompletableFlag(flag) {
+			return
+		}
+		for key := range flag.Annotations {
+			switch key {
+			case BashCompOneRequiredFlag:
+				format := "    must_have_one_flag+=(\"--%s"
+				if flag.Value.Type() != "bool" {
+					format += "="
+				}
+				format += "\")\n"
+				buf.WriteString(fmt.Sprintf(format, flag.Name))
+
+				if len(flag.Shorthand) > 0 {
+					buf.WriteString(fmt.Sprintf("    must_have_one_flag+=(\"-%s\")\n", flag.Shorthand))
+				}
+			}
+		}
+	})
+}
+
+func writeRequiredNouns(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    must_have_one_noun=()\n")
+	sort.Sort(sort.StringSlice(cmd.ValidArgs))
+	for _, value := range cmd.ValidArgs {
+		buf.WriteString(fmt.Sprintf("    must_have_one_noun+=(%q)\n", value))
+	}
+}
+
+func writeCmdAliases(buf *bytes.Buffer, cmd *Command) {
+	if len(cmd.Aliases) == 0 {
+		return
+	}
+
+	sort.Sort(sort.StringSlice(cmd.Aliases))
+
+	buf.WriteString(fmt.Sprint(`    if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then`, "\n"))
+	for _, value := range cmd.Aliases {
+		buf.WriteString(fmt.Sprintf("        command_aliases+=(%q)\n", value))
+		buf.WriteString(fmt.Sprintf("        aliashash[%q]=%q\n", value, cmd.Name()))
+	}
+	buf.WriteString(`    fi`)
+	buf.WriteString("\n")
+}
+func writeArgAliases(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    noun_aliases=()\n")
+	sort.Sort(sort.StringSlice(cmd.ArgAliases))
+	for _, value := range cmd.ArgAliases {
+		buf.WriteString(fmt.Sprintf("    noun_aliases+=(%q)\n", value))
+	}
+}
+
+func gen(buf *bytes.Buffer, cmd *Command) {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c == cmd.helpCommand {
+			continue
+		}
+		gen(buf, c)
+	}
+	commandName := cmd.CommandPath()
+	commandName = strings.Replace(commandName, " ", "_", -1)
+	commandName = strings.Replace(commandName, ":", "__", -1)
+
+	if cmd.Root() == cmd {
+		buf.WriteString(fmt.Sprintf("_%s_root_command()\n{\n", commandName))
+	} else {
+		buf.WriteString(fmt.Sprintf("_%s()\n{\n", commandName))
+	}
+
+	buf.WriteString(fmt.Sprintf("    last_command=%q\n", commandName))
+	buf.WriteString("\n")
+	buf.WriteString("    command_aliases=()\n")
+	buf.WriteString("\n")
+
+	writeCommands(buf, cmd)
+	writeFlags(buf, cmd)
+	writeRequiredFlag(buf, cmd)
+	writeRequiredNouns(buf, cmd)
+	writeArgAliases(buf, cmd)
+	buf.WriteString("}\n\n")
+}
+
+// GenBashCompletion generates bash completion file and writes to the passed writer.
+func (c *Command) GenBashCompletion(w io.Writer) error {
+	buf := new(bytes.Buffer)
+	writePreamble(buf, c.Name())
+	if len(c.BashCompletionFunction) > 0 {
+		buf.WriteString(c.BashCompletionFunction + "\n")
+	}
+	gen(buf, c)
+	writePostscript(buf, c.Name())
+
+	_, err := buf.WriteTo(w)
+	return err
+}
+
+func nonCompletableFlag(flag *pflag.Flag) bool {
+	return flag.Hidden || len(flag.Deprecated) > 0
+}
+
+// GenBashCompletionFile generates bash completion file.
+func (c *Command) GenBashCompletionFile(filename string) error {
+	outFile, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer outFile.Close()
+
+	return c.GenBashCompletion(outFile)
+}
+
+// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func (c *Command) MarkFlagRequired(name string) error {
+	return MarkFlagRequired(c.Flags(), name)
+}
+
+// MarkPersistentFlagRequired adds the BashCompOneRequiredFlag annotation to the named persistent flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func (c *Command) MarkPersistentFlagRequired(name string) error {
+	return MarkFlagRequired(c.PersistentFlags(), name)
+}
+
+// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func MarkFlagRequired(flags *pflag.FlagSet, name string) error {
+	return flags.SetAnnotation(name, BashCompOneRequiredFlag, []string{"true"})
+}
+
+// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func (c *Command) MarkFlagFilename(name string, extensions ...string) error {
+	return MarkFlagFilename(c.Flags(), name, extensions...)
+}
+
+// MarkFlagCustom adds the BashCompCustom annotation to the named flag, if it exists.
+// Generated bash autocompletion will call the bash function f for the flag.
+func (c *Command) MarkFlagCustom(name string, f string) error {
+	return MarkFlagCustom(c.Flags(), name, f)
+}
+
+// MarkPersistentFlagFilename adds the BashCompFilenameExt annotation to the named persistent flag, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func (c *Command) MarkPersistentFlagFilename(name string, extensions ...string) error {
+	return MarkFlagFilename(c.PersistentFlags(), name, extensions...)
+}
+
+// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag in the flag set, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func MarkFlagFilename(flags *pflag.FlagSet, name string, extensions ...string) error {
+	return flags.SetAnnotation(name, BashCompFilenameExt, extensions)
+}
+
+// MarkFlagCustom adds the BashCompCustom annotation to the named flag in the flag set, if it exists.
+// Generated bash autocompletion will call the bash function f for the flag.
+func MarkFlagCustom(flags *pflag.FlagSet, name string, f string) error {
+	return flags.SetAnnotation(name, BashCompCustom, []string{f})
+}
diff --git a/go/vendor/github.com/spf13/cobra/bash_completions.md b/go/vendor/github.com/spf13/cobra/bash_completions.md
new file mode 100644
index 0000000..e79d476
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/bash_completions.md
@@ -0,0 +1,221 @@
+# Generating Bash Completions For Your Own cobra.Command
+
+Generating bash completions from a cobra command is incredibly easy. An actual program which does so for the kubernetes kubectl binary is as follows:
+
+```go
+package main
+
+import (
+	"io/ioutil"
+	"os"
+
+	"k8s.io/kubernetes/pkg/kubectl/cmd"
+	"k8s.io/kubernetes/pkg/kubectl/cmd/util"
+)
+
+func main() {
+	kubectl := cmd.NewKubectlCommand(util.NewFactory(nil), os.Stdin, ioutil.Discard, ioutil.Discard)
+	kubectl.GenBashCompletionFile("out.sh")
+}
+```
+
+`out.sh` will get you completions of subcommands and flags. Copy it to `/etc/bash_completion.d/` as described [here](https://debian-administration.org/article/316/An_introduction_to_bash_completion_part_1) and reset your terminal to use autocompletion. If you make additional annotations to your code, you can get even more intelligent and flexible behavior.
+
+## Creating your own custom functions
+
+Some more actual code that works in kubernetes:
+
+```bash
+const (
+        bash_completion_func = `__kubectl_parse_get()
+{
+    local kubectl_output out
+    if kubectl_output=$(kubectl get --no-headers "$1" 2>/dev/null); then
+        out=($(echo "${kubectl_output}" | awk '{print $1}'))
+        COMPREPLY=( $( compgen -W "${out[*]}" -- "$cur" ) )
+    fi
+}
+
+__kubectl_get_resource()
+{
+    if [[ ${#nouns[@]} -eq 0 ]]; then
+        return 1
+    fi
+    __kubectl_parse_get ${nouns[${#nouns[@]} -1]}
+    if [[ $? -eq 0 ]]; then
+        return 0
+    fi
+}
+
+__custom_func() {
+    case ${last_command} in
+        kubectl_get | kubectl_describe | kubectl_delete | kubectl_stop)
+            __kubectl_get_resource
+            return
+            ;;
+        *)
+            ;;
+    esac
+}
+`)
+```
+
+And then I set that in my command definition:
+
+```go
+cmds := &cobra.Command{
+	Use:   "kubectl",
+	Short: "kubectl controls the Kubernetes cluster manager",
+	Long: `kubectl controls the Kubernetes cluster manager.
+
+Find more information at https://github.com/GoogleCloudPlatform/kubernetes.`,
+	Run: runHelp,
+	BashCompletionFunction: bash_completion_func,
+}
+```
+
+The `BashCompletionFunction` option is really only valid/useful on the root command. Doing the above will cause `__custom_func()` to be called when the built in processor was unable to find a solution. In the case of kubernetes a valid command might look something like `kubectl get pod [mypod]`. If you type `kubectl get pod [tab][tab]` the `__customc_func()` will run because the cobra.Command only understood "kubectl" and "get." `__custom_func()` will see that the cobra.Command is "kubectl_get" and will thus call another helper `__kubectl_get_resource()`.  `__kubectl_get_resource` will look at the 'nouns' collected. In our example the only noun will be `pod`.  So it will call `__kubectl_parse_get pod`.  `__kubectl_parse_get` will actually call out to kubernetes and get any pods.  It will then set `COMPREPLY` to valid pods!
+
+## Have the completions code complete your 'nouns'
+
+In the above example "pod" was assumed to already be typed. But if you want `kubectl get [tab][tab]` to show a list of valid "nouns" you have to set them. Simplified code from `kubectl get` looks like:
+
+```go
+validArgs []string = { "pod", "node", "service", "replicationcontroller" }
+
+cmd := &cobra.Command{
+	Use:     "get [(-o|--output=)json|yaml|template|...] (RESOURCE [NAME] | RESOURCE/NAME ...)",
+	Short:   "Display one or many resources",
+	Long:    get_long,
+	Example: get_example,
+	Run: func(cmd *cobra.Command, args []string) {
+		err := RunGet(f, out, cmd, args)
+		util.CheckErr(err)
+	},
+	ValidArgs: validArgs,
+}
+```
+
+Notice we put the "ValidArgs" on the "get" subcommand. Doing so will give results like
+
+```bash
+# kubectl get [tab][tab]
+node                 pod                    replicationcontroller  service
+```
+
+## Plural form and shortcuts for nouns
+
+If your nouns have a number of aliases, you can define them alongside `ValidArgs` using `ArgAliases`:
+
+```go
+argAliases []string = { "pods", "nodes", "services", "svc", "replicationcontrollers", "rc" }
+
+cmd := &cobra.Command{
+    ...
+	ValidArgs:  validArgs,
+	ArgAliases: argAliases
+}
+```
+
+The aliases are not shown to the user on tab completion, but they are accepted as valid nouns by
+the completion algorithm if entered manually, e.g. in:
+
+```bash
+# kubectl get rc [tab][tab]
+backend        frontend       database 
+```
+
+Note that without declaring `rc` as an alias, the completion algorithm would show the list of nouns
+in this example again instead of the replication controllers.
+
+## Mark flags as required
+
+Most of the time completions will only show subcommands. But if a flag is required to make a subcommand work, you probably want it to show up when the user types [tab][tab].  Marking a flag as 'Required' is incredibly easy.
+
+```go
+cmd.MarkFlagRequired("pod")
+cmd.MarkFlagRequired("container")
+```
+
+and you'll get something like
+
+```bash
+# kubectl exec [tab][tab][tab]
+-c            --container=  -p            --pod=  
+```
+
+# Specify valid filename extensions for flags that take a filename
+
+In this example we use --filename= and expect to get a json or yaml file as the argument. To make this easier we annotate the --filename flag with valid filename extensions.
+
+```go
+	annotations := []string{"json", "yaml", "yml"}
+	annotation := make(map[string][]string)
+	annotation[cobra.BashCompFilenameExt] = annotations
+
+	flag := &pflag.Flag{
+		Name:        "filename",
+		Shorthand:   "f",
+		Usage:       usage,
+		Value:       value,
+		DefValue:    value.String(),
+		Annotations: annotation,
+	}
+	cmd.Flags().AddFlag(flag)
+```
+
+Now when you run a command with this filename flag you'll get something like
+
+```bash
+# kubectl create -f 
+test/                         example/                      rpmbuild/
+hello.yml                     test.json
+```
+
+So while there are many other files in the CWD it only shows me subdirs and those with valid extensions.
+
+# Specify custom flag completion
+
+Similar to the filename completion and filtering using cobra.BashCompFilenameExt, you can specify
+a custom flag completion function with cobra.BashCompCustom:
+
+```go
+	annotation := make(map[string][]string)
+	annotation[cobra.BashCompCustom] = []string{"__kubectl_get_namespaces"}
+
+	flag := &pflag.Flag{
+		Name:        "namespace",
+		Usage:       usage,
+		Annotations: annotation,
+	}
+	cmd.Flags().AddFlag(flag)
+```
+
+In addition add the `__handle_namespace_flag` implementation in the `BashCompletionFunction`
+value, e.g.:
+
+```bash
+__kubectl_get_namespaces()
+{
+    local template
+    template="{{ range .items  }}{{ .metadata.name }} {{ end }}"
+    local kubectl_out
+    if kubectl_out=$(kubectl get -o template --template="${template}" namespace 2>/dev/null); then
+        COMPREPLY=( $( compgen -W "${kubectl_out}[*]" -- "$cur" ) )
+    fi
+}
+```
+# Using bash aliases for commands
+
+You can also configure the `bash aliases` for the commands and they will also support completions.
+
+```bash
+alias aliasname=origcommand
+complete -o default -F __start_origcommand aliasname
+
+# and now when you run `aliasname` completion will make
+# suggestions as it did for `origcommand`.
+
+$) aliasname <tab><tab>
+completion     firstcommand   secondcommand
+```
diff --git a/go/vendor/github.com/spf13/cobra/cobra.go b/go/vendor/github.com/spf13/cobra/cobra.go
new file mode 100644
index 0000000..7010fd1
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/cobra.go
@@ -0,0 +1,200 @@
+// Copyright © 2013 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Commands similar to git, go tools and other modern CLI tools
+// inspired by go, go-Commander, gh and subcommand
+
+package cobra
+
+import (
+	"fmt"
+	"io"
+	"reflect"
+	"strconv"
+	"strings"
+	"text/template"
+	"unicode"
+)
+
+var templateFuncs = template.FuncMap{
+	"trim":                    strings.TrimSpace,
+	"trimRightSpace":          trimRightSpace,
+	"trimTrailingWhitespaces": trimRightSpace,
+	"appendIfNotPresent":      appendIfNotPresent,
+	"rpad":                    rpad,
+	"gt":                      Gt,
+	"eq":                      Eq,
+}
+
+var initializers []func()
+
+// EnablePrefixMatching allows to set automatic prefix matching. Automatic prefix matching can be a dangerous thing
+// to automatically enable in CLI tools.
+// Set this to true to enable it.
+var EnablePrefixMatching = false
+
+// EnableCommandSorting controls sorting of the slice of commands, which is turned on by default.
+// To disable sorting, set it to false.
+var EnableCommandSorting = true
+
+// MousetrapHelpText enables an information splash screen on Windows
+// if the CLI is started from explorer.exe.
+// To disable the mousetrap, just set this variable to blank string ("").
+// Works only on Microsoft Windows.
+var MousetrapHelpText string = `This is a command line tool.
+
+You need to open cmd.exe and run it from there.
+`
+
+// AddTemplateFunc adds a template function that's available to Usage and Help
+// template generation.
+func AddTemplateFunc(name string, tmplFunc interface{}) {
+	templateFuncs[name] = tmplFunc
+}
+
+// AddTemplateFuncs adds multiple template functions that are available to Usage and
+// Help template generation.
+func AddTemplateFuncs(tmplFuncs template.FuncMap) {
+	for k, v := range tmplFuncs {
+		templateFuncs[k] = v
+	}
+}
+
+// OnInitialize sets the passed functions to be run when each command's
+// Execute method is called.
+func OnInitialize(y ...func()) {
+	initializers = append(initializers, y...)
+}
+
+// FIXME Gt is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
+
+// Gt takes two types and checks whether the first type is greater than the second. In case of types Arrays, Chans,
+// Maps and Slices, Gt will compare their lengths. Ints are compared directly while strings are first parsed as
+// ints and then compared.
+func Gt(a interface{}, b interface{}) bool {
+	var left, right int64
+	av := reflect.ValueOf(a)
+
+	switch av.Kind() {
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		left = int64(av.Len())
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		left = av.Int()
+	case reflect.String:
+		left, _ = strconv.ParseInt(av.String(), 10, 64)
+	}
+
+	bv := reflect.ValueOf(b)
+
+	switch bv.Kind() {
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		right = int64(bv.Len())
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		right = bv.Int()
+	case reflect.String:
+		right, _ = strconv.ParseInt(bv.String(), 10, 64)
+	}
+
+	return left > right
+}
+
+// FIXME Eq is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
+
+// Eq takes two types and checks whether they are equal. Supported types are int and string. Unsupported types will panic.
+func Eq(a interface{}, b interface{}) bool {
+	av := reflect.ValueOf(a)
+	bv := reflect.ValueOf(b)
+
+	switch av.Kind() {
+	case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice:
+		panic("Eq called on unsupported type")
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return av.Int() == bv.Int()
+	case reflect.String:
+		return av.String() == bv.String()
+	}
+	return false
+}
+
+func trimRightSpace(s string) string {
+	return strings.TrimRightFunc(s, unicode.IsSpace)
+}
+
+// FIXME appendIfNotPresent is unused by cobra and should be removed in a version 2. It exists only for compatibility with users of cobra.
+
+// appendIfNotPresent will append stringToAppend to the end of s, but only if it's not yet present in s.
+func appendIfNotPresent(s, stringToAppend string) string {
+	if strings.Contains(s, stringToAppend) {
+		return s
+	}
+	return s + " " + stringToAppend
+}
+
+// rpad adds padding to the right of a string.
+func rpad(s string, padding int) string {
+	template := fmt.Sprintf("%%-%ds", padding)
+	return fmt.Sprintf(template, s)
+}
+
+// tmpl executes the given template text on data, writing the result to w.
+func tmpl(w io.Writer, text string, data interface{}) error {
+	t := template.New("top")
+	t.Funcs(templateFuncs)
+	template.Must(t.Parse(text))
+	return t.Execute(w, data)
+}
+
+// ld compares two strings and returns the levenshtein distance between them.
+func ld(s, t string, ignoreCase bool) int {
+	if ignoreCase {
+		s = strings.ToLower(s)
+		t = strings.ToLower(t)
+	}
+	d := make([][]int, len(s)+1)
+	for i := range d {
+		d[i] = make([]int, len(t)+1)
+	}
+	for i := range d {
+		d[i][0] = i
+	}
+	for j := range d[0] {
+		d[0][j] = j
+	}
+	for j := 1; j <= len(t); j++ {
+		for i := 1; i <= len(s); i++ {
+			if s[i-1] == t[j-1] {
+				d[i][j] = d[i-1][j-1]
+			} else {
+				min := d[i-1][j]
+				if d[i][j-1] < min {
+					min = d[i][j-1]
+				}
+				if d[i-1][j-1] < min {
+					min = d[i-1][j-1]
+				}
+				d[i][j] = min + 1
+			}
+		}
+
+	}
+	return d[len(s)][len(t)]
+}
+
+func stringInSlice(a string, list []string) bool {
+	for _, b := range list {
+		if b == a {
+			return true
+		}
+	}
+	return false
+}
diff --git a/go/vendor/github.com/spf13/cobra/cobra/cmd/testdata/LICENSE.golden b/go/vendor/github.com/spf13/cobra/cobra/cmd/testdata/LICENSE.golden
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/cobra/cmd/testdata/LICENSE.golden
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      "Licensor" shall mean the copyright owner or entity authorized by
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+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      including but not limited to software source code, documentation
+      source, and configuration files.
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+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
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+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
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+      form, that is based on (or derived from) the Work and for which the
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+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
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+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
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+      designated in writing by the copyright owner as "Not a Contribution."
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
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+      meet the following conditions:
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+      (a) You must give any other recipients of the Work or
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+
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+          of the NOTICE file are for informational purposes only and
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+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
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+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
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+
+   7. Disclaimer of Warranty. Unless required by applicable law or
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+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
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+
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+
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+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/go/vendor/github.com/spf13/cobra/command.go b/go/vendor/github.com/spf13/cobra/command.go
new file mode 100644
index 0000000..34d1bf3
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/command.go
@@ -0,0 +1,1517 @@
+// Copyright © 2013 Steve Francia <spf@spf13.com>.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package cobra is a commander providing a simple interface to create powerful modern CLI interfaces.
+// In addition to providing an interface, Cobra simultaneously provides a controller to organize your application code.
+package cobra
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	flag "github.com/spf13/pflag"
+)
+
+// FParseErrWhitelist configures Flag parse errors to be ignored
+type FParseErrWhitelist flag.ParseErrorsWhitelist
+
+// Command is just that, a command for your application.
+// E.g.  'go run ...' - 'run' is the command. Cobra requires
+// you to define the usage and description as part of your command
+// definition to ensure usability.
+type Command struct {
+	// Use is the one-line usage message.
+	Use string
+
+	// Aliases is an array of aliases that can be used instead of the first word in Use.
+	Aliases []string
+
+	// SuggestFor is an array of command names for which this command will be suggested -
+	// similar to aliases but only suggests.
+	SuggestFor []string
+
+	// Short is the short description shown in the 'help' output.
+	Short string
+
+	// Long is the long message shown in the 'help <this-command>' output.
+	Long string
+
+	// Example is examples of how to use the command.
+	Example string
+
+	// ValidArgs is list of all valid non-flag arguments that are accepted in bash completions
+	ValidArgs []string
+
+	// Expected arguments
+	Args PositionalArgs
+
+	// ArgAliases is List of aliases for ValidArgs.
+	// These are not suggested to the user in the bash completion,
+	// but accepted if entered manually.
+	ArgAliases []string
+
+	// BashCompletionFunction is custom functions used by the bash autocompletion generator.
+	BashCompletionFunction string
+
+	// Deprecated defines, if this command is deprecated and should print this string when used.
+	Deprecated string
+
+	// Hidden defines, if this command is hidden and should NOT show up in the list of available commands.
+	Hidden bool
+
+	// Annotations are key/value pairs that can be used by applications to identify or
+	// group commands.
+	Annotations map[string]string
+
+	// Version defines the version for this command. If this value is non-empty and the command does not
+	// define a "version" flag, a "version" boolean flag will be added to the command and, if specified,
+	// will print content of the "Version" variable.
+	Version string
+
+	// The *Run functions are executed in the following order:
+	//   * PersistentPreRun()
+	//   * PreRun()
+	//   * Run()
+	//   * PostRun()
+	//   * PersistentPostRun()
+	// All functions get the same args, the arguments after the command name.
+	//
+	// PersistentPreRun: children of this command will inherit and execute.
+	PersistentPreRun func(cmd *Command, args []string)
+	// PersistentPreRunE: PersistentPreRun but returns an error.
+	PersistentPreRunE func(cmd *Command, args []string) error
+	// PreRun: children of this command will not inherit.
+	PreRun func(cmd *Command, args []string)
+	// PreRunE: PreRun but returns an error.
+	PreRunE func(cmd *Command, args []string) error
+	// Run: Typically the actual work function. Most commands will only implement this.
+	Run func(cmd *Command, args []string)
+	// RunE: Run but returns an error.
+	RunE func(cmd *Command, args []string) error
+	// PostRun: run after the Run command.
+	PostRun func(cmd *Command, args []string)
+	// PostRunE: PostRun but returns an error.
+	PostRunE func(cmd *Command, args []string) error
+	// PersistentPostRun: children of this command will inherit and execute after PostRun.
+	PersistentPostRun func(cmd *Command, args []string)
+	// PersistentPostRunE: PersistentPostRun but returns an error.
+	PersistentPostRunE func(cmd *Command, args []string) error
+
+	// SilenceErrors is an option to quiet errors down stream.
+	SilenceErrors bool
+
+	// SilenceUsage is an option to silence usage when an error occurs.
+	SilenceUsage bool
+
+	// DisableFlagParsing disables the flag parsing.
+	// If this is true all flags will be passed to the command as arguments.
+	DisableFlagParsing bool
+
+	// DisableAutoGenTag defines, if gen tag ("Auto generated by spf13/cobra...")
+	// will be printed by generating docs for this command.
+	DisableAutoGenTag bool
+
+	// DisableFlagsInUseLine will disable the addition of [flags] to the usage
+	// line of a command when printing help or generating docs
+	DisableFlagsInUseLine bool
+
+	// DisableSuggestions disables the suggestions based on Levenshtein distance
+	// that go along with 'unknown command' messages.
+	DisableSuggestions bool
+	// SuggestionsMinimumDistance defines minimum levenshtein distance to display suggestions.
+	// Must be > 0.
+	SuggestionsMinimumDistance int
+
+	// TraverseChildren parses flags on all parents before executing child command.
+	TraverseChildren bool
+
+	//FParseErrWhitelist flag parse errors to be ignored
+	FParseErrWhitelist FParseErrWhitelist
+
+	// commands is the list of commands supported by this program.
+	commands []*Command
+	// parent is a parent command for this command.
+	parent *Command
+	// Max lengths of commands' string lengths for use in padding.
+	commandsMaxUseLen         int
+	commandsMaxCommandPathLen int
+	commandsMaxNameLen        int
+	// commandsAreSorted defines, if command slice are sorted or not.
+	commandsAreSorted bool
+	// commandCalledAs is the name or alias value used to call this command.
+	commandCalledAs struct {
+		name   string
+		called bool
+	}
+
+	// args is actual args parsed from flags.
+	args []string
+	// flagErrorBuf contains all error messages from pflag.
+	flagErrorBuf *bytes.Buffer
+	// flags is full set of flags.
+	flags *flag.FlagSet
+	// pflags contains persistent flags.
+	pflags *flag.FlagSet
+	// lflags contains local flags.
+	lflags *flag.FlagSet
+	// iflags contains inherited flags.
+	iflags *flag.FlagSet
+	// parentsPflags is all persistent flags of cmd's parents.
+	parentsPflags *flag.FlagSet
+	// globNormFunc is the global normalization function
+	// that we can use on every pflag set and children commands
+	globNormFunc func(f *flag.FlagSet, name string) flag.NormalizedName
+
+	// output is an output writer defined by user.
+	output io.Writer
+	// usageFunc is usage func defined by user.
+	usageFunc func(*Command) error
+	// usageTemplate is usage template defined by user.
+	usageTemplate string
+	// flagErrorFunc is func defined by user and it's called when the parsing of
+	// flags returns an error.
+	flagErrorFunc func(*Command, error) error
+	// helpTemplate is help template defined by user.
+	helpTemplate string
+	// helpFunc is help func defined by user.
+	helpFunc func(*Command, []string)
+	// helpCommand is command with usage 'help'. If it's not defined by user,
+	// cobra uses default help command.
+	helpCommand *Command
+	// versionTemplate is the version template defined by user.
+	versionTemplate string
+}
+
+// SetArgs sets arguments for the command. It is set to os.Args[1:] by default, if desired, can be overridden
+// particularly useful when testing.
+func (c *Command) SetArgs(a []string) {
+	c.args = a
+}
+
+// SetOutput sets the destination for usage and error messages.
+// If output is nil, os.Stderr is used.
+func (c *Command) SetOutput(output io.Writer) {
+	c.output = output
+}
+
+// SetUsageFunc sets usage function. Usage can be defined by application.
+func (c *Command) SetUsageFunc(f func(*Command) error) {
+	c.usageFunc = f
+}
+
+// SetUsageTemplate sets usage template. Can be defined by Application.
+func (c *Command) SetUsageTemplate(s string) {
+	c.usageTemplate = s
+}
+
+// SetFlagErrorFunc sets a function to generate an error when flag parsing
+// fails.
+func (c *Command) SetFlagErrorFunc(f func(*Command, error) error) {
+	c.flagErrorFunc = f
+}
+
+// SetHelpFunc sets help function. Can be defined by Application.
+func (c *Command) SetHelpFunc(f func(*Command, []string)) {
+	c.helpFunc = f
+}
+
+// SetHelpCommand sets help command.
+func (c *Command) SetHelpCommand(cmd *Command) {
+	c.helpCommand = cmd
+}
+
+// SetHelpTemplate sets help template to be used. Application can use it to set custom template.
+func (c *Command) SetHelpTemplate(s string) {
+	c.helpTemplate = s
+}
+
+// SetVersionTemplate sets version template to be used. Application can use it to set custom template.
+func (c *Command) SetVersionTemplate(s string) {
+	c.versionTemplate = s
+}
+
+// SetGlobalNormalizationFunc sets a normalization function to all flag sets and also to child commands.
+// The user should not have a cyclic dependency on commands.
+func (c *Command) SetGlobalNormalizationFunc(n func(f *flag.FlagSet, name string) flag.NormalizedName) {
+	c.Flags().SetNormalizeFunc(n)
+	c.PersistentFlags().SetNormalizeFunc(n)
+	c.globNormFunc = n
+
+	for _, command := range c.commands {
+		command.SetGlobalNormalizationFunc(n)
+	}
+}
+
+// OutOrStdout returns output to stdout.
+func (c *Command) OutOrStdout() io.Writer {
+	return c.getOut(os.Stdout)
+}
+
+// OutOrStderr returns output to stderr
+func (c *Command) OutOrStderr() io.Writer {
+	return c.getOut(os.Stderr)
+}
+
+func (c *Command) getOut(def io.Writer) io.Writer {
+	if c.output != nil {
+		return c.output
+	}
+	if c.HasParent() {
+		return c.parent.getOut(def)
+	}
+	return def
+}
+
+// UsageFunc returns either the function set by SetUsageFunc for this command
+// or a parent, or it returns a default usage function.
+func (c *Command) UsageFunc() (f func(*Command) error) {
+	if c.usageFunc != nil {
+		return c.usageFunc
+	}
+	if c.HasParent() {
+		return c.Parent().UsageFunc()
+	}
+	return func(c *Command) error {
+		c.mergePersistentFlags()
+		err := tmpl(c.OutOrStderr(), c.UsageTemplate(), c)
+		if err != nil {
+			c.Println(err)
+		}
+		return err
+	}
+}
+
+// Usage puts out the usage for the command.
+// Used when a user provides invalid input.
+// Can be defined by user by overriding UsageFunc.
+func (c *Command) Usage() error {
+	return c.UsageFunc()(c)
+}
+
+// HelpFunc returns either the function set by SetHelpFunc for this command
+// or a parent, or it returns a function with default help behavior.
+func (c *Command) HelpFunc() func(*Command, []string) {
+	if c.helpFunc != nil {
+		return c.helpFunc
+	}
+	if c.HasParent() {
+		return c.Parent().HelpFunc()
+	}
+	return func(c *Command, a []string) {
+		c.mergePersistentFlags()
+		err := tmpl(c.OutOrStdout(), c.HelpTemplate(), c)
+		if err != nil {
+			c.Println(err)
+		}
+	}
+}
+
+// Help puts out the help for the command.
+// Used when a user calls help [command].
+// Can be defined by user by overriding HelpFunc.
+func (c *Command) Help() error {
+	c.HelpFunc()(c, []string{})
+	return nil
+}
+
+// UsageString return usage string.
+func (c *Command) UsageString() string {
+	tmpOutput := c.output
+	bb := new(bytes.Buffer)
+	c.SetOutput(bb)
+	c.Usage()
+	c.output = tmpOutput
+	return bb.String()
+}
+
+// FlagErrorFunc returns either the function set by SetFlagErrorFunc for this
+// command or a parent, or it returns a function which returns the original
+// error.
+func (c *Command) FlagErrorFunc() (f func(*Command, error) error) {
+	if c.flagErrorFunc != nil {
+		return c.flagErrorFunc
+	}
+
+	if c.HasParent() {
+		return c.parent.FlagErrorFunc()
+	}
+	return func(c *Command, err error) error {
+		return err
+	}
+}
+
+var minUsagePadding = 25
+
+// UsagePadding return padding for the usage.
+func (c *Command) UsagePadding() int {
+	if c.parent == nil || minUsagePadding > c.parent.commandsMaxUseLen {
+		return minUsagePadding
+	}
+	return c.parent.commandsMaxUseLen
+}
+
+var minCommandPathPadding = 11
+
+// CommandPathPadding return padding for the command path.
+func (c *Command) CommandPathPadding() int {
+	if c.parent == nil || minCommandPathPadding > c.parent.commandsMaxCommandPathLen {
+		return minCommandPathPadding
+	}
+	return c.parent.commandsMaxCommandPathLen
+}
+
+var minNamePadding = 11
+
+// NamePadding returns padding for the name.
+func (c *Command) NamePadding() int {
+	if c.parent == nil || minNamePadding > c.parent.commandsMaxNameLen {
+		return minNamePadding
+	}
+	return c.parent.commandsMaxNameLen
+}
+
+// UsageTemplate returns usage template for the command.
+func (c *Command) UsageTemplate() string {
+	if c.usageTemplate != "" {
+		return c.usageTemplate
+	}
+
+	if c.HasParent() {
+		return c.parent.UsageTemplate()
+	}
+	return `Usage:{{if .Runnable}}
+  {{.UseLine}}{{end}}{{if .HasAvailableSubCommands}}
+  {{.CommandPath}} [command]{{end}}{{if gt (len .Aliases) 0}}
+
+Aliases:
+  {{.NameAndAliases}}{{end}}{{if .HasExample}}
+
+Examples:
+{{.Example}}{{end}}{{if .HasAvailableSubCommands}}
+
+Available Commands:{{range .Commands}}{{if (or .IsAvailableCommand (eq .Name "help"))}}
+  {{rpad .Name .NamePadding }} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableLocalFlags}}
+
+Flags:
+{{.LocalFlags.FlagUsages | trimTrailingWhitespaces}}{{end}}{{if .HasAvailableInheritedFlags}}
+
+Global Flags:
+{{.InheritedFlags.FlagUsages | trimTrailingWhitespaces}}{{end}}{{if .HasHelpSubCommands}}
+
+Additional help topics:{{range .Commands}}{{if .IsAdditionalHelpTopicCommand}}
+  {{rpad .CommandPath .CommandPathPadding}} {{.Short}}{{end}}{{end}}{{end}}{{if .HasAvailableSubCommands}}
+
+Use "{{.CommandPath}} [command] --help" for more information about a command.{{end}}
+`
+}
+
+// HelpTemplate return help template for the command.
+func (c *Command) HelpTemplate() string {
+	if c.helpTemplate != "" {
+		return c.helpTemplate
+	}
+
+	if c.HasParent() {
+		return c.parent.HelpTemplate()
+	}
+	return `{{with (or .Long .Short)}}{{. | trimTrailingWhitespaces}}
+
+{{end}}{{if or .Runnable .HasSubCommands}}{{.UsageString}}{{end}}`
+}
+
+// VersionTemplate return version template for the command.
+func (c *Command) VersionTemplate() string {
+	if c.versionTemplate != "" {
+		return c.versionTemplate
+	}
+
+	if c.HasParent() {
+		return c.parent.VersionTemplate()
+	}
+	return `{{with .Name}}{{printf "%s " .}}{{end}}{{printf "version %s" .Version}}
+`
+}
+
+func hasNoOptDefVal(name string, fs *flag.FlagSet) bool {
+	flag := fs.Lookup(name)
+	if flag == nil {
+		return false
+	}
+	return flag.NoOptDefVal != ""
+}
+
+func shortHasNoOptDefVal(name string, fs *flag.FlagSet) bool {
+	if len(name) == 0 {
+		return false
+	}
+
+	flag := fs.ShorthandLookup(name[:1])
+	if flag == nil {
+		return false
+	}
+	return flag.NoOptDefVal != ""
+}
+
+func stripFlags(args []string, c *Command) []string {
+	if len(args) == 0 {
+		return args
+	}
+	c.mergePersistentFlags()
+
+	commands := []string{}
+	flags := c.Flags()
+
+Loop:
+	for len(args) > 0 {
+		s := args[0]
+		args = args[1:]
+		switch {
+		case s == "--":
+			// "--" terminates the flags
+			break Loop
+		case strings.HasPrefix(s, "--") && !strings.Contains(s, "=") && !hasNoOptDefVal(s[2:], flags):
+			// If '--flag arg' then
+			// delete arg from args.
+			fallthrough // (do the same as below)
+		case strings.HasPrefix(s, "-") && !strings.Contains(s, "=") && len(s) == 2 && !shortHasNoOptDefVal(s[1:], flags):
+			// If '-f arg' then
+			// delete 'arg' from args or break the loop if len(args) <= 1.
+			if len(args) <= 1 {
+				break Loop
+			} else {
+				args = args[1:]
+				continue
+			}
+		case s != "" && !strings.HasPrefix(s, "-"):
+			commands = append(commands, s)
+		}
+	}
+
+	return commands
+}
+
+// argsMinusFirstX removes only the first x from args.  Otherwise, commands that look like
+// openshift admin policy add-role-to-user admin my-user, lose the admin argument (arg[4]).
+func argsMinusFirstX(args []string, x string) []string {
+	for i, y := range args {
+		if x == y {
+			ret := []string{}
+			ret = append(ret, args[:i]...)
+			ret = append(ret, args[i+1:]...)
+			return ret
+		}
+	}
+	return args
+}
+
+func isFlagArg(arg string) bool {
+	return ((len(arg) >= 3 && arg[1] == '-') ||
+		(len(arg) >= 2 && arg[0] == '-' && arg[1] != '-'))
+}
+
+// Find the target command given the args and command tree
+// Meant to be run on the highest node. Only searches down.
+func (c *Command) Find(args []string) (*Command, []string, error) {
+	var innerfind func(*Command, []string) (*Command, []string)
+
+	innerfind = func(c *Command, innerArgs []string) (*Command, []string) {
+		argsWOflags := stripFlags(innerArgs, c)
+		if len(argsWOflags) == 0 {
+			return c, innerArgs
+		}
+		nextSubCmd := argsWOflags[0]
+
+		cmd := c.findNext(nextSubCmd)
+		if cmd != nil {
+			return innerfind(cmd, argsMinusFirstX(innerArgs, nextSubCmd))
+		}
+		return c, innerArgs
+	}
+
+	commandFound, a := innerfind(c, args)
+	if commandFound.Args == nil {
+		return commandFound, a, legacyArgs(commandFound, stripFlags(a, commandFound))
+	}
+	return commandFound, a, nil
+}
+
+func (c *Command) findSuggestions(arg string) string {
+	if c.DisableSuggestions {
+		return ""
+	}
+	if c.SuggestionsMinimumDistance <= 0 {
+		c.SuggestionsMinimumDistance = 2
+	}
+	suggestionsString := ""
+	if suggestions := c.SuggestionsFor(arg); len(suggestions) > 0 {
+		suggestionsString += "\n\nDid you mean this?\n"
+		for _, s := range suggestions {
+			suggestionsString += fmt.Sprintf("\t%v\n", s)
+		}
+	}
+	return suggestionsString
+}
+
+func (c *Command) findNext(next string) *Command {
+	matches := make([]*Command, 0)
+	for _, cmd := range c.commands {
+		if cmd.Name() == next || cmd.HasAlias(next) {
+			cmd.commandCalledAs.name = next
+			return cmd
+		}
+		if EnablePrefixMatching && cmd.hasNameOrAliasPrefix(next) {
+			matches = append(matches, cmd)
+		}
+	}
+
+	if len(matches) == 1 {
+		return matches[0]
+	}
+
+	return nil
+}
+
+// Traverse the command tree to find the command, and parse args for
+// each parent.
+func (c *Command) Traverse(args []string) (*Command, []string, error) {
+	flags := []string{}
+	inFlag := false
+
+	for i, arg := range args {
+		switch {
+		// A long flag with a space separated value
+		case strings.HasPrefix(arg, "--") && !strings.Contains(arg, "="):
+			// TODO: this isn't quite right, we should really check ahead for 'true' or 'false'
+			inFlag = !hasNoOptDefVal(arg[2:], c.Flags())
+			flags = append(flags, arg)
+			continue
+		// A short flag with a space separated value
+		case strings.HasPrefix(arg, "-") && !strings.Contains(arg, "=") && len(arg) == 2 && !shortHasNoOptDefVal(arg[1:], c.Flags()):
+			inFlag = true
+			flags = append(flags, arg)
+			continue
+		// The value for a flag
+		case inFlag:
+			inFlag = false
+			flags = append(flags, arg)
+			continue
+		// A flag without a value, or with an `=` separated value
+		case isFlagArg(arg):
+			flags = append(flags, arg)
+			continue
+		}
+
+		cmd := c.findNext(arg)
+		if cmd == nil {
+			return c, args, nil
+		}
+
+		if err := c.ParseFlags(flags); err != nil {
+			return nil, args, err
+		}
+		return cmd.Traverse(args[i+1:])
+	}
+	return c, args, nil
+}
+
+// SuggestionsFor provides suggestions for the typedName.
+func (c *Command) SuggestionsFor(typedName string) []string {
+	suggestions := []string{}
+	for _, cmd := range c.commands {
+		if cmd.IsAvailableCommand() {
+			levenshteinDistance := ld(typedName, cmd.Name(), true)
+			suggestByLevenshtein := levenshteinDistance <= c.SuggestionsMinimumDistance
+			suggestByPrefix := strings.HasPrefix(strings.ToLower(cmd.Name()), strings.ToLower(typedName))
+			if suggestByLevenshtein || suggestByPrefix {
+				suggestions = append(suggestions, cmd.Name())
+			}
+			for _, explicitSuggestion := range cmd.SuggestFor {
+				if strings.EqualFold(typedName, explicitSuggestion) {
+					suggestions = append(suggestions, cmd.Name())
+				}
+			}
+		}
+	}
+	return suggestions
+}
+
+// VisitParents visits all parents of the command and invokes fn on each parent.
+func (c *Command) VisitParents(fn func(*Command)) {
+	if c.HasParent() {
+		fn(c.Parent())
+		c.Parent().VisitParents(fn)
+	}
+}
+
+// Root finds root command.
+func (c *Command) Root() *Command {
+	if c.HasParent() {
+		return c.Parent().Root()
+	}
+	return c
+}
+
+// ArgsLenAtDash will return the length of c.Flags().Args at the moment
+// when a -- was found during args parsing.
+func (c *Command) ArgsLenAtDash() int {
+	return c.Flags().ArgsLenAtDash()
+}
+
+func (c *Command) execute(a []string) (err error) {
+	if c == nil {
+		return fmt.Errorf("Called Execute() on a nil Command")
+	}
+
+	if len(c.Deprecated) > 0 {
+		c.Printf("Command %q is deprecated, %s\n", c.Name(), c.Deprecated)
+	}
+
+	// initialize help and version flag at the last point possible to allow for user
+	// overriding
+	c.InitDefaultHelpFlag()
+	c.InitDefaultVersionFlag()
+
+	err = c.ParseFlags(a)
+	if err != nil {
+		return c.FlagErrorFunc()(c, err)
+	}
+
+	// If help is called, regardless of other flags, return we want help.
+	// Also say we need help if the command isn't runnable.
+	helpVal, err := c.Flags().GetBool("help")
+	if err != nil {
+		// should be impossible to get here as we always declare a help
+		// flag in InitDefaultHelpFlag()
+		c.Println("\"help\" flag declared as non-bool. Please correct your code")
+		return err
+	}
+
+	if helpVal {
+		return flag.ErrHelp
+	}
+
+	// for back-compat, only add version flag behavior if version is defined
+	if c.Version != "" {
+		versionVal, err := c.Flags().GetBool("version")
+		if err != nil {
+			c.Println("\"version\" flag declared as non-bool. Please correct your code")
+			return err
+		}
+		if versionVal {
+			err := tmpl(c.OutOrStdout(), c.VersionTemplate(), c)
+			if err != nil {
+				c.Println(err)
+			}
+			return err
+		}
+	}
+
+	if !c.Runnable() {
+		return flag.ErrHelp
+	}
+
+	c.preRun()
+
+	argWoFlags := c.Flags().Args()
+	if c.DisableFlagParsing {
+		argWoFlags = a
+	}
+
+	if err := c.ValidateArgs(argWoFlags); err != nil {
+		return err
+	}
+
+	for p := c; p != nil; p = p.Parent() {
+		if p.PersistentPreRunE != nil {
+			if err := p.PersistentPreRunE(c, argWoFlags); err != nil {
+				return err
+			}
+			break
+		} else if p.PersistentPreRun != nil {
+			p.PersistentPreRun(c, argWoFlags)
+			break
+		}
+	}
+	if c.PreRunE != nil {
+		if err := c.PreRunE(c, argWoFlags); err != nil {
+			return err
+		}
+	} else if c.PreRun != nil {
+		c.PreRun(c, argWoFlags)
+	}
+
+	if err := c.validateRequiredFlags(); err != nil {
+		return err
+	}
+	if c.RunE != nil {
+		if err := c.RunE(c, argWoFlags); err != nil {
+			return err
+		}
+	} else {
+		c.Run(c, argWoFlags)
+	}
+	if c.PostRunE != nil {
+		if err := c.PostRunE(c, argWoFlags); err != nil {
+			return err
+		}
+	} else if c.PostRun != nil {
+		c.PostRun(c, argWoFlags)
+	}
+	for p := c; p != nil; p = p.Parent() {
+		if p.PersistentPostRunE != nil {
+			if err := p.PersistentPostRunE(c, argWoFlags); err != nil {
+				return err
+			}
+			break
+		} else if p.PersistentPostRun != nil {
+			p.PersistentPostRun(c, argWoFlags)
+			break
+		}
+	}
+
+	return nil
+}
+
+func (c *Command) preRun() {
+	for _, x := range initializers {
+		x()
+	}
+}
+
+// Execute uses the args (os.Args[1:] by default)
+// and run through the command tree finding appropriate matches
+// for commands and then corresponding flags.
+func (c *Command) Execute() error {
+	_, err := c.ExecuteC()
+	return err
+}
+
+// ExecuteC executes the command.
+func (c *Command) ExecuteC() (cmd *Command, err error) {
+	// Regardless of what command execute is called on, run on Root only
+	if c.HasParent() {
+		return c.Root().ExecuteC()
+	}
+
+	// windows hook
+	if preExecHookFn != nil {
+		preExecHookFn(c)
+	}
+
+	// initialize help as the last point possible to allow for user
+	// overriding
+	c.InitDefaultHelpCmd()
+
+	var args []string
+
+	// Workaround FAIL with "go test -v" or "cobra.test -test.v", see #155
+	if c.args == nil && filepath.Base(os.Args[0]) != "cobra.test" {
+		args = os.Args[1:]
+	} else {
+		args = c.args
+	}
+
+	var flags []string
+	if c.TraverseChildren {
+		cmd, flags, err = c.Traverse(args)
+	} else {
+		cmd, flags, err = c.Find(args)
+	}
+	if err != nil {
+		// If found parse to a subcommand and then failed, talk about the subcommand
+		if cmd != nil {
+			c = cmd
+		}
+		if !c.SilenceErrors {
+			c.Println("Error:", err.Error())
+			c.Printf("Run '%v --help' for usage.\n", c.CommandPath())
+		}
+		return c, err
+	}
+
+	cmd.commandCalledAs.called = true
+	if cmd.commandCalledAs.name == "" {
+		cmd.commandCalledAs.name = cmd.Name()
+	}
+
+	err = cmd.execute(flags)
+	if err != nil {
+		// Always show help if requested, even if SilenceErrors is in
+		// effect
+		if err == flag.ErrHelp {
+			cmd.HelpFunc()(cmd, args)
+			return cmd, nil
+		}
+
+		// If root command has SilentErrors flagged,
+		// all subcommands should respect it
+		if !cmd.SilenceErrors && !c.SilenceErrors {
+			c.Println("Error:", err.Error())
+		}
+
+		// If root command has SilentUsage flagged,
+		// all subcommands should respect it
+		if !cmd.SilenceUsage && !c.SilenceUsage {
+			c.Println(cmd.UsageString())
+		}
+	}
+	return cmd, err
+}
+
+func (c *Command) ValidateArgs(args []string) error {
+	if c.Args == nil {
+		return nil
+	}
+	return c.Args(c, args)
+}
+
+func (c *Command) validateRequiredFlags() error {
+	flags := c.Flags()
+	missingFlagNames := []string{}
+	flags.VisitAll(func(pflag *flag.Flag) {
+		requiredAnnotation, found := pflag.Annotations[BashCompOneRequiredFlag]
+		if !found {
+			return
+		}
+		if (requiredAnnotation[0] == "true") && !pflag.Changed {
+			missingFlagNames = append(missingFlagNames, pflag.Name)
+		}
+	})
+
+	if len(missingFlagNames) > 0 {
+		return fmt.Errorf(`required flag(s) "%s" not set`, strings.Join(missingFlagNames, `", "`))
+	}
+	return nil
+}
+
+// InitDefaultHelpFlag adds default help flag to c.
+// It is called automatically by executing the c or by calling help and usage.
+// If c already has help flag, it will do nothing.
+func (c *Command) InitDefaultHelpFlag() {
+	c.mergePersistentFlags()
+	if c.Flags().Lookup("help") == nil {
+		usage := "help for "
+		if c.Name() == "" {
+			usage += "this command"
+		} else {
+			usage += c.Name()
+		}
+		c.Flags().BoolP("help", "h", false, usage)
+	}
+}
+
+// InitDefaultVersionFlag adds default version flag to c.
+// It is called automatically by executing the c.
+// If c already has a version flag, it will do nothing.
+// If c.Version is empty, it will do nothing.
+func (c *Command) InitDefaultVersionFlag() {
+	if c.Version == "" {
+		return
+	}
+
+	c.mergePersistentFlags()
+	if c.Flags().Lookup("version") == nil {
+		usage := "version for "
+		if c.Name() == "" {
+			usage += "this command"
+		} else {
+			usage += c.Name()
+		}
+		c.Flags().Bool("version", false, usage)
+	}
+}
+
+// InitDefaultHelpCmd adds default help command to c.
+// It is called automatically by executing the c or by calling help and usage.
+// If c already has help command or c has no subcommands, it will do nothing.
+func (c *Command) InitDefaultHelpCmd() {
+	if !c.HasSubCommands() {
+		return
+	}
+
+	if c.helpCommand == nil {
+		c.helpCommand = &Command{
+			Use:   "help [command]",
+			Short: "Help about any command",
+			Long: `Help provides help for any command in the application.
+Simply type ` + c.Name() + ` help [path to command] for full details.`,
+
+			Run: func(c *Command, args []string) {
+				cmd, _, e := c.Root().Find(args)
+				if cmd == nil || e != nil {
+					c.Printf("Unknown help topic %#q\n", args)
+					c.Root().Usage()
+				} else {
+					cmd.InitDefaultHelpFlag() // make possible 'help' flag to be shown
+					cmd.Help()
+				}
+			},
+		}
+	}
+	c.RemoveCommand(c.helpCommand)
+	c.AddCommand(c.helpCommand)
+}
+
+// ResetCommands delete parent, subcommand and help command from c.
+func (c *Command) ResetCommands() {
+	c.parent = nil
+	c.commands = nil
+	c.helpCommand = nil
+	c.parentsPflags = nil
+}
+
+// Sorts commands by their names.
+type commandSorterByName []*Command
+
+func (c commandSorterByName) Len() int           { return len(c) }
+func (c commandSorterByName) Swap(i, j int)      { c[i], c[j] = c[j], c[i] }
+func (c commandSorterByName) Less(i, j int) bool { return c[i].Name() < c[j].Name() }
+
+// Commands returns a sorted slice of child commands.
+func (c *Command) Commands() []*Command {
+	// do not sort commands if it already sorted or sorting was disabled
+	if EnableCommandSorting && !c.commandsAreSorted {
+		sort.Sort(commandSorterByName(c.commands))
+		c.commandsAreSorted = true
+	}
+	return c.commands
+}
+
+// AddCommand adds one or more commands to this parent command.
+func (c *Command) AddCommand(cmds ...*Command) {
+	for i, x := range cmds {
+		if cmds[i] == c {
+			panic("Command can't be a child of itself")
+		}
+		cmds[i].parent = c
+		// update max lengths
+		usageLen := len(x.Use)
+		if usageLen > c.commandsMaxUseLen {
+			c.commandsMaxUseLen = usageLen
+		}
+		commandPathLen := len(x.CommandPath())
+		if commandPathLen > c.commandsMaxCommandPathLen {
+			c.commandsMaxCommandPathLen = commandPathLen
+		}
+		nameLen := len(x.Name())
+		if nameLen > c.commandsMaxNameLen {
+			c.commandsMaxNameLen = nameLen
+		}
+		// If global normalization function exists, update all children
+		if c.globNormFunc != nil {
+			x.SetGlobalNormalizationFunc(c.globNormFunc)
+		}
+		c.commands = append(c.commands, x)
+		c.commandsAreSorted = false
+	}
+}
+
+// RemoveCommand removes one or more commands from a parent command.
+func (c *Command) RemoveCommand(cmds ...*Command) {
+	commands := []*Command{}
+main:
+	for _, command := range c.commands {
+		for _, cmd := range cmds {
+			if command == cmd {
+				command.parent = nil
+				continue main
+			}
+		}
+		commands = append(commands, command)
+	}
+	c.commands = commands
+	// recompute all lengths
+	c.commandsMaxUseLen = 0
+	c.commandsMaxCommandPathLen = 0
+	c.commandsMaxNameLen = 0
+	for _, command := range c.commands {
+		usageLen := len(command.Use)
+		if usageLen > c.commandsMaxUseLen {
+			c.commandsMaxUseLen = usageLen
+		}
+		commandPathLen := len(command.CommandPath())
+		if commandPathLen > c.commandsMaxCommandPathLen {
+			c.commandsMaxCommandPathLen = commandPathLen
+		}
+		nameLen := len(command.Name())
+		if nameLen > c.commandsMaxNameLen {
+			c.commandsMaxNameLen = nameLen
+		}
+	}
+}
+
+// Print is a convenience method to Print to the defined output, fallback to Stderr if not set.
+func (c *Command) Print(i ...interface{}) {
+	fmt.Fprint(c.OutOrStderr(), i...)
+}
+
+// Println is a convenience method to Println to the defined output, fallback to Stderr if not set.
+func (c *Command) Println(i ...interface{}) {
+	c.Print(fmt.Sprintln(i...))
+}
+
+// Printf is a convenience method to Printf to the defined output, fallback to Stderr if not set.
+func (c *Command) Printf(format string, i ...interface{}) {
+	c.Print(fmt.Sprintf(format, i...))
+}
+
+// CommandPath returns the full path to this command.
+func (c *Command) CommandPath() string {
+	if c.HasParent() {
+		return c.Parent().CommandPath() + " " + c.Name()
+	}
+	return c.Name()
+}
+
+// UseLine puts out the full usage for a given command (including parents).
+func (c *Command) UseLine() string {
+	var useline string
+	if c.HasParent() {
+		useline = c.parent.CommandPath() + " " + c.Use
+	} else {
+		useline = c.Use
+	}
+	if c.DisableFlagsInUseLine {
+		return useline
+	}
+	if c.HasAvailableFlags() && !strings.Contains(useline, "[flags]") {
+		useline += " [flags]"
+	}
+	return useline
+}
+
+// DebugFlags used to determine which flags have been assigned to which commands
+// and which persist.
+func (c *Command) DebugFlags() {
+	c.Println("DebugFlags called on", c.Name())
+	var debugflags func(*Command)
+
+	debugflags = func(x *Command) {
+		if x.HasFlags() || x.HasPersistentFlags() {
+			c.Println(x.Name())
+		}
+		if x.HasFlags() {
+			x.flags.VisitAll(func(f *flag.Flag) {
+				if x.HasPersistentFlags() && x.persistentFlag(f.Name) != nil {
+					c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [LP]")
+				} else {
+					c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [L]")
+				}
+			})
+		}
+		if x.HasPersistentFlags() {
+			x.pflags.VisitAll(func(f *flag.Flag) {
+				if x.HasFlags() {
+					if x.flags.Lookup(f.Name) == nil {
+						c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [P]")
+					}
+				} else {
+					c.Println("  -"+f.Shorthand+",", "--"+f.Name, "["+f.DefValue+"]", "", f.Value, "  [P]")
+				}
+			})
+		}
+		c.Println(x.flagErrorBuf)
+		if x.HasSubCommands() {
+			for _, y := range x.commands {
+				debugflags(y)
+			}
+		}
+	}
+
+	debugflags(c)
+}
+
+// Name returns the command's name: the first word in the use line.
+func (c *Command) Name() string {
+	name := c.Use
+	i := strings.Index(name, " ")
+	if i >= 0 {
+		name = name[:i]
+	}
+	return name
+}
+
+// HasAlias determines if a given string is an alias of the command.
+func (c *Command) HasAlias(s string) bool {
+	for _, a := range c.Aliases {
+		if a == s {
+			return true
+		}
+	}
+	return false
+}
+
+// CalledAs returns the command name or alias that was used to invoke
+// this command or an empty string if the command has not been called.
+func (c *Command) CalledAs() string {
+	if c.commandCalledAs.called {
+		return c.commandCalledAs.name
+	}
+	return ""
+}
+
+// hasNameOrAliasPrefix returns true if the Name or any of aliases start
+// with prefix
+func (c *Command) hasNameOrAliasPrefix(prefix string) bool {
+	if strings.HasPrefix(c.Name(), prefix) {
+		c.commandCalledAs.name = c.Name()
+		return true
+	}
+	for _, alias := range c.Aliases {
+		if strings.HasPrefix(alias, prefix) {
+			c.commandCalledAs.name = alias
+			return true
+		}
+	}
+	return false
+}
+
+// NameAndAliases returns a list of the command name and all aliases
+func (c *Command) NameAndAliases() string {
+	return strings.Join(append([]string{c.Name()}, c.Aliases...), ", ")
+}
+
+// HasExample determines if the command has example.
+func (c *Command) HasExample() bool {
+	return len(c.Example) > 0
+}
+
+// Runnable determines if the command is itself runnable.
+func (c *Command) Runnable() bool {
+	return c.Run != nil || c.RunE != nil
+}
+
+// HasSubCommands determines if the command has children commands.
+func (c *Command) HasSubCommands() bool {
+	return len(c.commands) > 0
+}
+
+// IsAvailableCommand determines if a command is available as a non-help command
+// (this includes all non deprecated/hidden commands).
+func (c *Command) IsAvailableCommand() bool {
+	if len(c.Deprecated) != 0 || c.Hidden {
+		return false
+	}
+
+	if c.HasParent() && c.Parent().helpCommand == c {
+		return false
+	}
+
+	if c.Runnable() || c.HasAvailableSubCommands() {
+		return true
+	}
+
+	return false
+}
+
+// IsAdditionalHelpTopicCommand determines if a command is an additional
+// help topic command; additional help topic command is determined by the
+// fact that it is NOT runnable/hidden/deprecated, and has no sub commands that
+// are runnable/hidden/deprecated.
+// Concrete example: https://github.com/spf13/cobra/issues/393#issuecomment-282741924.
+func (c *Command) IsAdditionalHelpTopicCommand() bool {
+	// if a command is runnable, deprecated, or hidden it is not a 'help' command
+	if c.Runnable() || len(c.Deprecated) != 0 || c.Hidden {
+		return false
+	}
+
+	// if any non-help sub commands are found, the command is not a 'help' command
+	for _, sub := range c.commands {
+		if !sub.IsAdditionalHelpTopicCommand() {
+			return false
+		}
+	}
+
+	// the command either has no sub commands, or no non-help sub commands
+	return true
+}
+
+// HasHelpSubCommands determines if a command has any available 'help' sub commands
+// that need to be shown in the usage/help default template under 'additional help
+// topics'.
+func (c *Command) HasHelpSubCommands() bool {
+	// return true on the first found available 'help' sub command
+	for _, sub := range c.commands {
+		if sub.IsAdditionalHelpTopicCommand() {
+			return true
+		}
+	}
+
+	// the command either has no sub commands, or no available 'help' sub commands
+	return false
+}
+
+// HasAvailableSubCommands determines if a command has available sub commands that
+// need to be shown in the usage/help default template under 'available commands'.
+func (c *Command) HasAvailableSubCommands() bool {
+	// return true on the first found available (non deprecated/help/hidden)
+	// sub command
+	for _, sub := range c.commands {
+		if sub.IsAvailableCommand() {
+			return true
+		}
+	}
+
+	// the command either has no sub commands, or no available (non deprecated/help/hidden)
+	// sub commands
+	return false
+}
+
+// HasParent determines if the command is a child command.
+func (c *Command) HasParent() bool {
+	return c.parent != nil
+}
+
+// GlobalNormalizationFunc returns the global normalization function or nil if it doesn't exist.
+func (c *Command) GlobalNormalizationFunc() func(f *flag.FlagSet, name string) flag.NormalizedName {
+	return c.globNormFunc
+}
+
+// Flags returns the complete FlagSet that applies
+// to this command (local and persistent declared here and by all parents).
+func (c *Command) Flags() *flag.FlagSet {
+	if c.flags == nil {
+		c.flags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		if c.flagErrorBuf == nil {
+			c.flagErrorBuf = new(bytes.Buffer)
+		}
+		c.flags.SetOutput(c.flagErrorBuf)
+	}
+
+	return c.flags
+}
+
+// LocalNonPersistentFlags are flags specific to this command which will NOT persist to subcommands.
+func (c *Command) LocalNonPersistentFlags() *flag.FlagSet {
+	persistentFlags := c.PersistentFlags()
+
+	out := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	c.LocalFlags().VisitAll(func(f *flag.Flag) {
+		if persistentFlags.Lookup(f.Name) == nil {
+			out.AddFlag(f)
+		}
+	})
+	return out
+}
+
+// LocalFlags returns the local FlagSet specifically set in the current command.
+func (c *Command) LocalFlags() *flag.FlagSet {
+	c.mergePersistentFlags()
+
+	if c.lflags == nil {
+		c.lflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		if c.flagErrorBuf == nil {
+			c.flagErrorBuf = new(bytes.Buffer)
+		}
+		c.lflags.SetOutput(c.flagErrorBuf)
+	}
+	c.lflags.SortFlags = c.Flags().SortFlags
+	if c.globNormFunc != nil {
+		c.lflags.SetNormalizeFunc(c.globNormFunc)
+	}
+
+	addToLocal := func(f *flag.Flag) {
+		if c.lflags.Lookup(f.Name) == nil && c.parentsPflags.Lookup(f.Name) == nil {
+			c.lflags.AddFlag(f)
+		}
+	}
+	c.Flags().VisitAll(addToLocal)
+	c.PersistentFlags().VisitAll(addToLocal)
+	return c.lflags
+}
+
+// InheritedFlags returns all flags which were inherited from parents commands.
+func (c *Command) InheritedFlags() *flag.FlagSet {
+	c.mergePersistentFlags()
+
+	if c.iflags == nil {
+		c.iflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		if c.flagErrorBuf == nil {
+			c.flagErrorBuf = new(bytes.Buffer)
+		}
+		c.iflags.SetOutput(c.flagErrorBuf)
+	}
+
+	local := c.LocalFlags()
+	if c.globNormFunc != nil {
+		c.iflags.SetNormalizeFunc(c.globNormFunc)
+	}
+
+	c.parentsPflags.VisitAll(func(f *flag.Flag) {
+		if c.iflags.Lookup(f.Name) == nil && local.Lookup(f.Name) == nil {
+			c.iflags.AddFlag(f)
+		}
+	})
+	return c.iflags
+}
+
+// NonInheritedFlags returns all flags which were not inherited from parent commands.
+func (c *Command) NonInheritedFlags() *flag.FlagSet {
+	return c.LocalFlags()
+}
+
+// PersistentFlags returns the persistent FlagSet specifically set in the current command.
+func (c *Command) PersistentFlags() *flag.FlagSet {
+	if c.pflags == nil {
+		c.pflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		if c.flagErrorBuf == nil {
+			c.flagErrorBuf = new(bytes.Buffer)
+		}
+		c.pflags.SetOutput(c.flagErrorBuf)
+	}
+	return c.pflags
+}
+
+// ResetFlags deletes all flags from command.
+func (c *Command) ResetFlags() {
+	c.flagErrorBuf = new(bytes.Buffer)
+	c.flagErrorBuf.Reset()
+	c.flags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	c.flags.SetOutput(c.flagErrorBuf)
+	c.pflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	c.pflags.SetOutput(c.flagErrorBuf)
+
+	c.lflags = nil
+	c.iflags = nil
+	c.parentsPflags = nil
+}
+
+// HasFlags checks if the command contains any flags (local plus persistent from the entire structure).
+func (c *Command) HasFlags() bool {
+	return c.Flags().HasFlags()
+}
+
+// HasPersistentFlags checks if the command contains persistent flags.
+func (c *Command) HasPersistentFlags() bool {
+	return c.PersistentFlags().HasFlags()
+}
+
+// HasLocalFlags checks if the command has flags specifically declared locally.
+func (c *Command) HasLocalFlags() bool {
+	return c.LocalFlags().HasFlags()
+}
+
+// HasInheritedFlags checks if the command has flags inherited from its parent command.
+func (c *Command) HasInheritedFlags() bool {
+	return c.InheritedFlags().HasFlags()
+}
+
+// HasAvailableFlags checks if the command contains any flags (local plus persistent from the entire
+// structure) which are not hidden or deprecated.
+func (c *Command) HasAvailableFlags() bool {
+	return c.Flags().HasAvailableFlags()
+}
+
+// HasAvailablePersistentFlags checks if the command contains persistent flags which are not hidden or deprecated.
+func (c *Command) HasAvailablePersistentFlags() bool {
+	return c.PersistentFlags().HasAvailableFlags()
+}
+
+// HasAvailableLocalFlags checks if the command has flags specifically declared locally which are not hidden
+// or deprecated.
+func (c *Command) HasAvailableLocalFlags() bool {
+	return c.LocalFlags().HasAvailableFlags()
+}
+
+// HasAvailableInheritedFlags checks if the command has flags inherited from its parent command which are
+// not hidden or deprecated.
+func (c *Command) HasAvailableInheritedFlags() bool {
+	return c.InheritedFlags().HasAvailableFlags()
+}
+
+// Flag climbs up the command tree looking for matching flag.
+func (c *Command) Flag(name string) (flag *flag.Flag) {
+	flag = c.Flags().Lookup(name)
+
+	if flag == nil {
+		flag = c.persistentFlag(name)
+	}
+
+	return
+}
+
+// Recursively find matching persistent flag.
+func (c *Command) persistentFlag(name string) (flag *flag.Flag) {
+	if c.HasPersistentFlags() {
+		flag = c.PersistentFlags().Lookup(name)
+	}
+
+	if flag == nil {
+		c.updateParentsPflags()
+		flag = c.parentsPflags.Lookup(name)
+	}
+	return
+}
+
+// ParseFlags parses persistent flag tree and local flags.
+func (c *Command) ParseFlags(args []string) error {
+	if c.DisableFlagParsing {
+		return nil
+	}
+
+	if c.flagErrorBuf == nil {
+		c.flagErrorBuf = new(bytes.Buffer)
+	}
+	beforeErrorBufLen := c.flagErrorBuf.Len()
+	c.mergePersistentFlags()
+
+	//do it here after merging all flags and just before parse
+	c.Flags().ParseErrorsWhitelist = flag.ParseErrorsWhitelist(c.FParseErrWhitelist)
+
+	err := c.Flags().Parse(args)
+	// Print warnings if they occurred (e.g. deprecated flag messages).
+	if c.flagErrorBuf.Len()-beforeErrorBufLen > 0 && err == nil {
+		c.Print(c.flagErrorBuf.String())
+	}
+
+	return err
+}
+
+// Parent returns a commands parent command.
+func (c *Command) Parent() *Command {
+	return c.parent
+}
+
+// mergePersistentFlags merges c.PersistentFlags() to c.Flags()
+// and adds missing persistent flags of all parents.
+func (c *Command) mergePersistentFlags() {
+	c.updateParentsPflags()
+	c.Flags().AddFlagSet(c.PersistentFlags())
+	c.Flags().AddFlagSet(c.parentsPflags)
+}
+
+// updateParentsPflags updates c.parentsPflags by adding
+// new persistent flags of all parents.
+// If c.parentsPflags == nil, it makes new.
+func (c *Command) updateParentsPflags() {
+	if c.parentsPflags == nil {
+		c.parentsPflags = flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+		c.parentsPflags.SetOutput(c.flagErrorBuf)
+		c.parentsPflags.SortFlags = false
+	}
+
+	if c.globNormFunc != nil {
+		c.parentsPflags.SetNormalizeFunc(c.globNormFunc)
+	}
+
+	c.Root().PersistentFlags().AddFlagSet(flag.CommandLine)
+
+	c.VisitParents(func(parent *Command) {
+		c.parentsPflags.AddFlagSet(parent.PersistentFlags())
+	})
+}
diff --git a/go/vendor/github.com/spf13/cobra/command_notwin.go b/go/vendor/github.com/spf13/cobra/command_notwin.go
new file mode 100644
index 0000000..6159c1c
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/command_notwin.go
@@ -0,0 +1,5 @@
+// +build !windows
+
+package cobra
+
+var preExecHookFn func(*Command)
diff --git a/go/vendor/github.com/spf13/cobra/command_win.go b/go/vendor/github.com/spf13/cobra/command_win.go
new file mode 100644
index 0000000..edec728
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/command_win.go
@@ -0,0 +1,20 @@
+// +build windows
+
+package cobra
+
+import (
+	"os"
+	"time"
+
+	"github.com/inconshreveable/mousetrap"
+)
+
+var preExecHookFn = preExecHook
+
+func preExecHook(c *Command) {
+	if MousetrapHelpText != "" && mousetrap.StartedByExplorer() {
+		c.Print(MousetrapHelpText)
+		time.Sleep(5 * time.Second)
+		os.Exit(1)
+	}
+}
diff --git a/go/vendor/github.com/spf13/cobra/zsh_completions.go b/go/vendor/github.com/spf13/cobra/zsh_completions.go
new file mode 100644
index 0000000..889c22e
--- /dev/null
+++ b/go/vendor/github.com/spf13/cobra/zsh_completions.go
@@ -0,0 +1,126 @@
+package cobra
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// GenZshCompletionFile generates zsh completion file.
+func (c *Command) GenZshCompletionFile(filename string) error {
+	outFile, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer outFile.Close()
+
+	return c.GenZshCompletion(outFile)
+}
+
+// GenZshCompletion generates a zsh completion file and writes to the passed writer.
+func (c *Command) GenZshCompletion(w io.Writer) error {
+	buf := new(bytes.Buffer)
+
+	writeHeader(buf, c)
+	maxDepth := maxDepth(c)
+	writeLevelMapping(buf, maxDepth)
+	writeLevelCases(buf, maxDepth, c)
+
+	_, err := buf.WriteTo(w)
+	return err
+}
+
+func writeHeader(w io.Writer, cmd *Command) {
+	fmt.Fprintf(w, "#compdef %s\n\n", cmd.Name())
+}
+
+func maxDepth(c *Command) int {
+	if len(c.Commands()) == 0 {
+		return 0
+	}
+	maxDepthSub := 0
+	for _, s := range c.Commands() {
+		subDepth := maxDepth(s)
+		if subDepth > maxDepthSub {
+			maxDepthSub = subDepth
+		}
+	}
+	return 1 + maxDepthSub
+}
+
+func writeLevelMapping(w io.Writer, numLevels int) {
+	fmt.Fprintln(w, `_arguments \`)
+	for i := 1; i <= numLevels; i++ {
+		fmt.Fprintf(w, `  '%d: :->level%d' \`, i, i)
+		fmt.Fprintln(w)
+	}
+	fmt.Fprintf(w, `  '%d: :%s'`, numLevels+1, "_files")
+	fmt.Fprintln(w)
+}
+
+func writeLevelCases(w io.Writer, maxDepth int, root *Command) {
+	fmt.Fprintln(w, "case $state in")
+	defer fmt.Fprintln(w, "esac")
+
+	for i := 1; i <= maxDepth; i++ {
+		fmt.Fprintf(w, "  level%d)\n", i)
+		writeLevel(w, root, i)
+		fmt.Fprintln(w, "  ;;")
+	}
+	fmt.Fprintln(w, "  *)")
+	fmt.Fprintln(w, "    _arguments '*: :_files'")
+	fmt.Fprintln(w, "  ;;")
+}
+
+func writeLevel(w io.Writer, root *Command, i int) {
+	fmt.Fprintf(w, "    case $words[%d] in\n", i)
+	defer fmt.Fprintln(w, "    esac")
+
+	commands := filterByLevel(root, i)
+	byParent := groupByParent(commands)
+
+	for p, c := range byParent {
+		names := names(c)
+		fmt.Fprintf(w, "      %s)\n", p)
+		fmt.Fprintf(w, "        _arguments '%d: :(%s)'\n", i, strings.Join(names, " "))
+		fmt.Fprintln(w, "      ;;")
+	}
+	fmt.Fprintln(w, "      *)")
+	fmt.Fprintln(w, "        _arguments '*: :_files'")
+	fmt.Fprintln(w, "      ;;")
+
+}
+
+func filterByLevel(c *Command, l int) []*Command {
+	cs := make([]*Command, 0)
+	if l == 0 {
+		cs = append(cs, c)
+		return cs
+	}
+	for _, s := range c.Commands() {
+		cs = append(cs, filterByLevel(s, l-1)...)
+	}
+	return cs
+}
+
+func groupByParent(commands []*Command) map[string][]*Command {
+	m := make(map[string][]*Command)
+	for _, c := range commands {
+		parent := c.Parent()
+		if parent == nil {
+			continue
+		}
+		m[parent.Name()] = append(m[parent.Name()], c)
+	}
+	return m
+}
+
+func names(commands []*Command) []string {
+	ns := make([]string, len(commands))
+	for i, c := range commands {
+		ns[i] = c.Name()
+	}
+	return ns
+}
diff --git a/go/vendor/github.com/spf13/pflag/.gitignore b/go/vendor/github.com/spf13/pflag/.gitignore
new file mode 100644
index 0000000..c3da290
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/.gitignore
@@ -0,0 +1,2 @@
+.idea/*
+
diff --git a/go/vendor/github.com/spf13/pflag/.travis.yml b/go/vendor/github.com/spf13/pflag/.travis.yml
new file mode 100644
index 0000000..f8a63b3
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/.travis.yml
@@ -0,0 +1,21 @@
+sudo: false
+
+language: go
+
+go:
+  - 1.7.3
+  - 1.8.1
+  - tip
+
+matrix:
+  allow_failures:
+    - go: tip
+
+install:
+  - go get github.com/golang/lint/golint
+  - export PATH=$GOPATH/bin:$PATH
+  - go install ./...
+
+script:
+  - verify/all.sh -v
+  - go test ./...
diff --git a/go/vendor/github.com/spf13/pflag/LICENSE b/go/vendor/github.com/spf13/pflag/LICENSE
new file mode 100644
index 0000000..63ed1cf
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/LICENSE
@@ -0,0 +1,28 @@
+Copyright (c) 2012 Alex Ogier. All rights reserved.
+Copyright (c) 2012 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/go/vendor/github.com/spf13/pflag/README.md b/go/vendor/github.com/spf13/pflag/README.md
new file mode 100644
index 0000000..b052414
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/README.md
@@ -0,0 +1,296 @@
+[![Build Status](https://travis-ci.org/spf13/pflag.svg?branch=master)](https://travis-ci.org/spf13/pflag)
+[![Go Report Card](https://goreportcard.com/badge/github.com/spf13/pflag)](https://goreportcard.com/report/github.com/spf13/pflag)
+[![GoDoc](https://godoc.org/github.com/spf13/pflag?status.svg)](https://godoc.org/github.com/spf13/pflag)
+
+## Description
+
+pflag is a drop-in replacement for Go's flag package, implementing
+POSIX/GNU-style --flags.
+
+pflag is compatible with the [GNU extensions to the POSIX recommendations
+for command-line options][1]. For a more precise description, see the
+"Command-line flag syntax" section below.
+
+[1]: http://www.gnu.org/software/libc/manual/html_node/Argument-Syntax.html
+
+pflag is available under the same style of BSD license as the Go language,
+which can be found in the LICENSE file.
+
+## Installation
+
+pflag is available using the standard `go get` command.
+
+Install by running:
+
+    go get github.com/spf13/pflag
+
+Run tests by running:
+
+    go test github.com/spf13/pflag
+
+## Usage
+
+pflag is a drop-in replacement of Go's native flag package. If you import
+pflag under the name "flag" then all code should continue to function
+with no changes.
+
+``` go
+import flag "github.com/spf13/pflag"
+```
+
+There is one exception to this: if you directly instantiate the Flag struct
+there is one more field "Shorthand" that you will need to set.
+Most code never instantiates this struct directly, and instead uses
+functions such as String(), BoolVar(), and Var(), and is therefore
+unaffected.
+
+Define flags using flag.String(), Bool(), Int(), etc.
+
+This declares an integer flag, -flagname, stored in the pointer ip, with type *int.
+
+``` go
+var ip *int = flag.Int("flagname", 1234, "help message for flagname")
+```
+
+If you like, you can bind the flag to a variable using the Var() functions.
+
+``` go
+var flagvar int
+func init() {
+    flag.IntVar(&flagvar, "flagname", 1234, "help message for flagname")
+}
+```
+
+Or you can create custom flags that satisfy the Value interface (with
+pointer receivers) and couple them to flag parsing by
+
+``` go
+flag.Var(&flagVal, "name", "help message for flagname")
+```
+
+For such flags, the default value is just the initial value of the variable.
+
+After all flags are defined, call
+
+``` go
+flag.Parse()
+```
+
+to parse the command line into the defined flags.
+
+Flags may then be used directly. If you're using the flags themselves,
+they are all pointers; if you bind to variables, they're values.
+
+``` go
+fmt.Println("ip has value ", *ip)
+fmt.Println("flagvar has value ", flagvar)
+```
+
+There are helpers function to get values later if you have the FlagSet but
+it was difficult to keep up with all of the flag pointers in your code.
+If you have a pflag.FlagSet with a flag called 'flagname' of type int you
+can use GetInt() to get the int value. But notice that 'flagname' must exist
+and it must be an int. GetString("flagname") will fail.
+
+``` go
+i, err := flagset.GetInt("flagname")
+```
+
+After parsing, the arguments after the flag are available as the
+slice flag.Args() or individually as flag.Arg(i).
+The arguments are indexed from 0 through flag.NArg()-1.
+
+The pflag package also defines some new functions that are not in flag,
+that give one-letter shorthands for flags. You can use these by appending
+'P' to the name of any function that defines a flag.
+
+``` go
+var ip = flag.IntP("flagname", "f", 1234, "help message")
+var flagvar bool
+func init() {
+	flag.BoolVarP(&flagvar, "boolname", "b", true, "help message")
+}
+flag.VarP(&flagVal, "varname", "v", "help message")
+```
+
+Shorthand letters can be used with single dashes on the command line.
+Boolean shorthand flags can be combined with other shorthand flags.
+
+The default set of command-line flags is controlled by
+top-level functions.  The FlagSet type allows one to define
+independent sets of flags, such as to implement subcommands
+in a command-line interface. The methods of FlagSet are
+analogous to the top-level functions for the command-line
+flag set.
+
+## Setting no option default values for flags
+
+After you create a flag it is possible to set the pflag.NoOptDefVal for
+the given flag. Doing this changes the meaning of the flag slightly. If
+a flag has a NoOptDefVal and the flag is set on the command line without
+an option the flag will be set to the NoOptDefVal. For example given:
+
+``` go
+var ip = flag.IntP("flagname", "f", 1234, "help message")
+flag.Lookup("flagname").NoOptDefVal = "4321"
+```
+
+Would result in something like
+
+| Parsed Arguments | Resulting Value |
+| -------------    | -------------   |
+| --flagname=1357  | ip=1357         |
+| --flagname       | ip=4321         |
+| [nothing]        | ip=1234         |
+
+## Command line flag syntax
+
+```
+--flag    // boolean flags, or flags with no option default values
+--flag x  // only on flags without a default value
+--flag=x
+```
+
+Unlike the flag package, a single dash before an option means something
+different than a double dash. Single dashes signify a series of shorthand
+letters for flags. All but the last shorthand letter must be boolean flags
+or a flag with a default value
+
+```
+// boolean or flags where the 'no option default value' is set
+-f
+-f=true
+-abc
+but
+-b true is INVALID
+
+// non-boolean and flags without a 'no option default value'
+-n 1234
+-n=1234
+-n1234
+
+// mixed
+-abcs "hello"
+-absd="hello"
+-abcs1234
+```
+
+Flag parsing stops after the terminator "--". Unlike the flag package,
+flags can be interspersed with arguments anywhere on the command line
+before this terminator.
+
+Integer flags accept 1234, 0664, 0x1234 and may be negative.
+Boolean flags (in their long form) accept 1, 0, t, f, true, false,
+TRUE, FALSE, True, False.
+Duration flags accept any input valid for time.ParseDuration.
+
+## Mutating or "Normalizing" Flag names
+
+It is possible to set a custom flag name 'normalization function.' It allows flag names to be mutated both when created in the code and when used on the command line to some 'normalized' form. The 'normalized' form is used for comparison. Two examples of using the custom normalization func follow.
+
+**Example #1**: You want -, _, and . in flags to compare the same. aka --my-flag == --my_flag == --my.flag
+
+``` go
+func wordSepNormalizeFunc(f *pflag.FlagSet, name string) pflag.NormalizedName {
+	from := []string{"-", "_"}
+	to := "."
+	for _, sep := range from {
+		name = strings.Replace(name, sep, to, -1)
+	}
+	return pflag.NormalizedName(name)
+}
+
+myFlagSet.SetNormalizeFunc(wordSepNormalizeFunc)
+```
+
+**Example #2**: You want to alias two flags. aka --old-flag-name == --new-flag-name
+
+``` go
+func aliasNormalizeFunc(f *pflag.FlagSet, name string) pflag.NormalizedName {
+	switch name {
+	case "old-flag-name":
+		name = "new-flag-name"
+		break
+	}
+	return pflag.NormalizedName(name)
+}
+
+myFlagSet.SetNormalizeFunc(aliasNormalizeFunc)
+```
+
+## Deprecating a flag or its shorthand
+It is possible to deprecate a flag, or just its shorthand. Deprecating a flag/shorthand hides it from help text and prints a usage message when the deprecated flag/shorthand is used.
+
+**Example #1**: You want to deprecate a flag named "badflag" as well as inform the users what flag they should use instead.
+```go
+// deprecate a flag by specifying its name and a usage message
+flags.MarkDeprecated("badflag", "please use --good-flag instead")
+```
+This hides "badflag" from help text, and prints `Flag --badflag has been deprecated, please use --good-flag instead` when "badflag" is used.
+
+**Example #2**: You want to keep a flag name "noshorthandflag" but deprecate its shortname "n".
+```go
+// deprecate a flag shorthand by specifying its flag name and a usage message
+flags.MarkShorthandDeprecated("noshorthandflag", "please use --noshorthandflag only")
+```
+This hides the shortname "n" from help text, and prints `Flag shorthand -n has been deprecated, please use --noshorthandflag only` when the shorthand "n" is used.
+
+Note that usage message is essential here, and it should not be empty.
+
+## Hidden flags
+It is possible to mark a flag as hidden, meaning it will still function as normal, however will not show up in usage/help text.
+
+**Example**: You have a flag named "secretFlag" that you need for internal use only and don't want it showing up in help text, or for its usage text to be available.
+```go
+// hide a flag by specifying its name
+flags.MarkHidden("secretFlag")
+```
+
+## Disable sorting of flags
+`pflag` allows you to disable sorting of flags for help and usage message.
+
+**Example**:
+```go
+flags.BoolP("verbose", "v", false, "verbose output")
+flags.String("coolflag", "yeaah", "it's really cool flag")
+flags.Int("usefulflag", 777, "sometimes it's very useful")
+flags.SortFlags = false
+flags.PrintDefaults()
+```
+**Output**:
+```
+  -v, --verbose           verbose output
+      --coolflag string   it's really cool flag (default "yeaah")
+      --usefulflag int    sometimes it's very useful (default 777)
+```
+
+
+## Supporting Go flags when using pflag
+In order to support flags defined using Go's `flag` package, they must be added to the `pflag` flagset. This is usually necessary
+to support flags defined by third-party dependencies (e.g. `golang/glog`).
+
+**Example**: You want to add the Go flags to the `CommandLine` flagset
+```go
+import (
+	goflag "flag"
+	flag "github.com/spf13/pflag"
+)
+
+var ip *int = flag.Int("flagname", 1234, "help message for flagname")
+
+func main() {
+	flag.CommandLine.AddGoFlagSet(goflag.CommandLine)
+	flag.Parse()
+}
+```
+
+## More info
+
+You can see the full reference documentation of the pflag package
+[at godoc.org][3], or through go's standard documentation system by
+running `godoc -http=:6060` and browsing to
+[http://localhost:6060/pkg/github.com/spf13/pflag][2] after
+installation.
+
+[2]: http://localhost:6060/pkg/github.com/spf13/pflag
+[3]: http://godoc.org/github.com/spf13/pflag
diff --git a/go/vendor/github.com/spf13/pflag/bool.go b/go/vendor/github.com/spf13/pflag/bool.go
new file mode 100644
index 0000000..c4c5c0b
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/bool.go
@@ -0,0 +1,94 @@
+package pflag
+
+import "strconv"
+
+// optional interface to indicate boolean flags that can be
+// supplied without "=value" text
+type boolFlag interface {
+	Value
+	IsBoolFlag() bool
+}
+
+// -- bool Value
+type boolValue bool
+
+func newBoolValue(val bool, p *bool) *boolValue {
+	*p = val
+	return (*boolValue)(p)
+}
+
+func (b *boolValue) Set(s string) error {
+	v, err := strconv.ParseBool(s)
+	*b = boolValue(v)
+	return err
+}
+
+func (b *boolValue) Type() string {
+	return "bool"
+}
+
+func (b *boolValue) String() string { return strconv.FormatBool(bool(*b)) }
+
+func (b *boolValue) IsBoolFlag() bool { return true }
+
+func boolConv(sval string) (interface{}, error) {
+	return strconv.ParseBool(sval)
+}
+
+// GetBool return the bool value of a flag with the given name
+func (f *FlagSet) GetBool(name string) (bool, error) {
+	val, err := f.getFlagType(name, "bool", boolConv)
+	if err != nil {
+		return false, err
+	}
+	return val.(bool), nil
+}
+
+// BoolVar defines a bool flag with specified name, default value, and usage string.
+// The argument p points to a bool variable in which to store the value of the flag.
+func (f *FlagSet) BoolVar(p *bool, name string, value bool, usage string) {
+	f.BoolVarP(p, name, "", value, usage)
+}
+
+// BoolVarP is like BoolVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolVarP(p *bool, name, shorthand string, value bool, usage string) {
+	flag := f.VarPF(newBoolValue(value, p), name, shorthand, usage)
+	flag.NoOptDefVal = "true"
+}
+
+// BoolVar defines a bool flag with specified name, default value, and usage string.
+// The argument p points to a bool variable in which to store the value of the flag.
+func BoolVar(p *bool, name string, value bool, usage string) {
+	BoolVarP(p, name, "", value, usage)
+}
+
+// BoolVarP is like BoolVar, but accepts a shorthand letter that can be used after a single dash.
+func BoolVarP(p *bool, name, shorthand string, value bool, usage string) {
+	flag := CommandLine.VarPF(newBoolValue(value, p), name, shorthand, usage)
+	flag.NoOptDefVal = "true"
+}
+
+// Bool defines a bool flag with specified name, default value, and usage string.
+// The return value is the address of a bool variable that stores the value of the flag.
+func (f *FlagSet) Bool(name string, value bool, usage string) *bool {
+	return f.BoolP(name, "", value, usage)
+}
+
+// BoolP is like Bool, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolP(name, shorthand string, value bool, usage string) *bool {
+	p := new(bool)
+	f.BoolVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Bool defines a bool flag with specified name, default value, and usage string.
+// The return value is the address of a bool variable that stores the value of the flag.
+func Bool(name string, value bool, usage string) *bool {
+	return BoolP(name, "", value, usage)
+}
+
+// BoolP is like Bool, but accepts a shorthand letter that can be used after a single dash.
+func BoolP(name, shorthand string, value bool, usage string) *bool {
+	b := CommandLine.BoolP(name, shorthand, value, usage)
+	return b
+}
diff --git a/go/vendor/github.com/spf13/pflag/bool_slice.go b/go/vendor/github.com/spf13/pflag/bool_slice.go
new file mode 100644
index 0000000..5af02f1
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/bool_slice.go
@@ -0,0 +1,147 @@
+package pflag
+
+import (
+	"io"
+	"strconv"
+	"strings"
+)
+
+// -- boolSlice Value
+type boolSliceValue struct {
+	value   *[]bool
+	changed bool
+}
+
+func newBoolSliceValue(val []bool, p *[]bool) *boolSliceValue {
+	bsv := new(boolSliceValue)
+	bsv.value = p
+	*bsv.value = val
+	return bsv
+}
+
+// Set converts, and assigns, the comma-separated boolean argument string representation as the []bool value of this flag.
+// If Set is called on a flag that already has a []bool assigned, the newly converted values will be appended.
+func (s *boolSliceValue) Set(val string) error {
+
+	// remove all quote characters
+	rmQuote := strings.NewReplacer(`"`, "", `'`, "", "`", "")
+
+	// read flag arguments with CSV parser
+	boolStrSlice, err := readAsCSV(rmQuote.Replace(val))
+	if err != nil && err != io.EOF {
+		return err
+	}
+
+	// parse boolean values into slice
+	out := make([]bool, 0, len(boolStrSlice))
+	for _, boolStr := range boolStrSlice {
+		b, err := strconv.ParseBool(strings.TrimSpace(boolStr))
+		if err != nil {
+			return err
+		}
+		out = append(out, b)
+	}
+
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+
+	s.changed = true
+
+	return nil
+}
+
+// Type returns a string that uniquely represents this flag's type.
+func (s *boolSliceValue) Type() string {
+	return "boolSlice"
+}
+
+// String defines a "native" format for this boolean slice flag value.
+func (s *boolSliceValue) String() string {
+
+	boolStrSlice := make([]string, len(*s.value))
+	for i, b := range *s.value {
+		boolStrSlice[i] = strconv.FormatBool(b)
+	}
+
+	out, _ := writeAsCSV(boolStrSlice)
+
+	return "[" + out + "]"
+}
+
+func boolSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Empty string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []bool{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]bool, len(ss))
+	for i, t := range ss {
+		var err error
+		out[i], err = strconv.ParseBool(t)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return out, nil
+}
+
+// GetBoolSlice returns the []bool value of a flag with the given name.
+func (f *FlagSet) GetBoolSlice(name string) ([]bool, error) {
+	val, err := f.getFlagType(name, "boolSlice", boolSliceConv)
+	if err != nil {
+		return []bool{}, err
+	}
+	return val.([]bool), nil
+}
+
+// BoolSliceVar defines a boolSlice flag with specified name, default value, and usage string.
+// The argument p points to a []bool variable in which to store the value of the flag.
+func (f *FlagSet) BoolSliceVar(p *[]bool, name string, value []bool, usage string) {
+	f.VarP(newBoolSliceValue(value, p), name, "", usage)
+}
+
+// BoolSliceVarP is like BoolSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolSliceVarP(p *[]bool, name, shorthand string, value []bool, usage string) {
+	f.VarP(newBoolSliceValue(value, p), name, shorthand, usage)
+}
+
+// BoolSliceVar defines a []bool flag with specified name, default value, and usage string.
+// The argument p points to a []bool variable in which to store the value of the flag.
+func BoolSliceVar(p *[]bool, name string, value []bool, usage string) {
+	CommandLine.VarP(newBoolSliceValue(value, p), name, "", usage)
+}
+
+// BoolSliceVarP is like BoolSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func BoolSliceVarP(p *[]bool, name, shorthand string, value []bool, usage string) {
+	CommandLine.VarP(newBoolSliceValue(value, p), name, shorthand, usage)
+}
+
+// BoolSlice defines a []bool flag with specified name, default value, and usage string.
+// The return value is the address of a []bool variable that stores the value of the flag.
+func (f *FlagSet) BoolSlice(name string, value []bool, usage string) *[]bool {
+	p := []bool{}
+	f.BoolSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// BoolSliceP is like BoolSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BoolSliceP(name, shorthand string, value []bool, usage string) *[]bool {
+	p := []bool{}
+	f.BoolSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// BoolSlice defines a []bool flag with specified name, default value, and usage string.
+// The return value is the address of a []bool variable that stores the value of the flag.
+func BoolSlice(name string, value []bool, usage string) *[]bool {
+	return CommandLine.BoolSliceP(name, "", value, usage)
+}
+
+// BoolSliceP is like BoolSlice, but accepts a shorthand letter that can be used after a single dash.
+func BoolSliceP(name, shorthand string, value []bool, usage string) *[]bool {
+	return CommandLine.BoolSliceP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/bytes.go b/go/vendor/github.com/spf13/pflag/bytes.go
new file mode 100644
index 0000000..67d5304
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/bytes.go
@@ -0,0 +1,209 @@
+package pflag
+
+import (
+	"encoding/base64"
+	"encoding/hex"
+	"fmt"
+	"strings"
+)
+
+// BytesHex adapts []byte for use as a flag. Value of flag is HEX encoded
+type bytesHexValue []byte
+
+// String implements pflag.Value.String.
+func (bytesHex bytesHexValue) String() string {
+	return fmt.Sprintf("%X", []byte(bytesHex))
+}
+
+// Set implements pflag.Value.Set.
+func (bytesHex *bytesHexValue) Set(value string) error {
+	bin, err := hex.DecodeString(strings.TrimSpace(value))
+
+	if err != nil {
+		return err
+	}
+
+	*bytesHex = bin
+
+	return nil
+}
+
+// Type implements pflag.Value.Type.
+func (*bytesHexValue) Type() string {
+	return "bytesHex"
+}
+
+func newBytesHexValue(val []byte, p *[]byte) *bytesHexValue {
+	*p = val
+	return (*bytesHexValue)(p)
+}
+
+func bytesHexConv(sval string) (interface{}, error) {
+
+	bin, err := hex.DecodeString(sval)
+
+	if err == nil {
+		return bin, nil
+	}
+
+	return nil, fmt.Errorf("invalid string being converted to Bytes: %s %s", sval, err)
+}
+
+// GetBytesHex return the []byte value of a flag with the given name
+func (f *FlagSet) GetBytesHex(name string) ([]byte, error) {
+	val, err := f.getFlagType(name, "bytesHex", bytesHexConv)
+
+	if err != nil {
+		return []byte{}, err
+	}
+
+	return val.([]byte), nil
+}
+
+// BytesHexVar defines an []byte flag with specified name, default value, and usage string.
+// The argument p points to an []byte variable in which to store the value of the flag.
+func (f *FlagSet) BytesHexVar(p *[]byte, name string, value []byte, usage string) {
+	f.VarP(newBytesHexValue(value, p), name, "", usage)
+}
+
+// BytesHexVarP is like BytesHexVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BytesHexVarP(p *[]byte, name, shorthand string, value []byte, usage string) {
+	f.VarP(newBytesHexValue(value, p), name, shorthand, usage)
+}
+
+// BytesHexVar defines an []byte flag with specified name, default value, and usage string.
+// The argument p points to an []byte variable in which to store the value of the flag.
+func BytesHexVar(p *[]byte, name string, value []byte, usage string) {
+	CommandLine.VarP(newBytesHexValue(value, p), name, "", usage)
+}
+
+// BytesHexVarP is like BytesHexVar, but accepts a shorthand letter that can be used after a single dash.
+func BytesHexVarP(p *[]byte, name, shorthand string, value []byte, usage string) {
+	CommandLine.VarP(newBytesHexValue(value, p), name, shorthand, usage)
+}
+
+// BytesHex defines an []byte flag with specified name, default value, and usage string.
+// The return value is the address of an []byte variable that stores the value of the flag.
+func (f *FlagSet) BytesHex(name string, value []byte, usage string) *[]byte {
+	p := new([]byte)
+	f.BytesHexVarP(p, name, "", value, usage)
+	return p
+}
+
+// BytesHexP is like BytesHex, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BytesHexP(name, shorthand string, value []byte, usage string) *[]byte {
+	p := new([]byte)
+	f.BytesHexVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// BytesHex defines an []byte flag with specified name, default value, and usage string.
+// The return value is the address of an []byte variable that stores the value of the flag.
+func BytesHex(name string, value []byte, usage string) *[]byte {
+	return CommandLine.BytesHexP(name, "", value, usage)
+}
+
+// BytesHexP is like BytesHex, but accepts a shorthand letter that can be used after a single dash.
+func BytesHexP(name, shorthand string, value []byte, usage string) *[]byte {
+	return CommandLine.BytesHexP(name, shorthand, value, usage)
+}
+
+// BytesBase64 adapts []byte for use as a flag. Value of flag is Base64 encoded
+type bytesBase64Value []byte
+
+// String implements pflag.Value.String.
+func (bytesBase64 bytesBase64Value) String() string {
+	return base64.StdEncoding.EncodeToString([]byte(bytesBase64))
+}
+
+// Set implements pflag.Value.Set.
+func (bytesBase64 *bytesBase64Value) Set(value string) error {
+	bin, err := base64.StdEncoding.DecodeString(strings.TrimSpace(value))
+
+	if err != nil {
+		return err
+	}
+
+	*bytesBase64 = bin
+
+	return nil
+}
+
+// Type implements pflag.Value.Type.
+func (*bytesBase64Value) Type() string {
+	return "bytesBase64"
+}
+
+func newBytesBase64Value(val []byte, p *[]byte) *bytesBase64Value {
+	*p = val
+	return (*bytesBase64Value)(p)
+}
+
+func bytesBase64ValueConv(sval string) (interface{}, error) {
+
+	bin, err := base64.StdEncoding.DecodeString(sval)
+	if err == nil {
+		return bin, nil
+	}
+
+	return nil, fmt.Errorf("invalid string being converted to Bytes: %s %s", sval, err)
+}
+
+// GetBytesBase64 return the []byte value of a flag with the given name
+func (f *FlagSet) GetBytesBase64(name string) ([]byte, error) {
+	val, err := f.getFlagType(name, "bytesBase64", bytesBase64ValueConv)
+
+	if err != nil {
+		return []byte{}, err
+	}
+
+	return val.([]byte), nil
+}
+
+// BytesBase64Var defines an []byte flag with specified name, default value, and usage string.
+// The argument p points to an []byte variable in which to store the value of the flag.
+func (f *FlagSet) BytesBase64Var(p *[]byte, name string, value []byte, usage string) {
+	f.VarP(newBytesBase64Value(value, p), name, "", usage)
+}
+
+// BytesBase64VarP is like BytesBase64Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BytesBase64VarP(p *[]byte, name, shorthand string, value []byte, usage string) {
+	f.VarP(newBytesBase64Value(value, p), name, shorthand, usage)
+}
+
+// BytesBase64Var defines an []byte flag with specified name, default value, and usage string.
+// The argument p points to an []byte variable in which to store the value of the flag.
+func BytesBase64Var(p *[]byte, name string, value []byte, usage string) {
+	CommandLine.VarP(newBytesBase64Value(value, p), name, "", usage)
+}
+
+// BytesBase64VarP is like BytesBase64Var, but accepts a shorthand letter that can be used after a single dash.
+func BytesBase64VarP(p *[]byte, name, shorthand string, value []byte, usage string) {
+	CommandLine.VarP(newBytesBase64Value(value, p), name, shorthand, usage)
+}
+
+// BytesBase64 defines an []byte flag with specified name, default value, and usage string.
+// The return value is the address of an []byte variable that stores the value of the flag.
+func (f *FlagSet) BytesBase64(name string, value []byte, usage string) *[]byte {
+	p := new([]byte)
+	f.BytesBase64VarP(p, name, "", value, usage)
+	return p
+}
+
+// BytesBase64P is like BytesBase64, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) BytesBase64P(name, shorthand string, value []byte, usage string) *[]byte {
+	p := new([]byte)
+	f.BytesBase64VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// BytesBase64 defines an []byte flag with specified name, default value, and usage string.
+// The return value is the address of an []byte variable that stores the value of the flag.
+func BytesBase64(name string, value []byte, usage string) *[]byte {
+	return CommandLine.BytesBase64P(name, "", value, usage)
+}
+
+// BytesBase64P is like BytesBase64, but accepts a shorthand letter that can be used after a single dash.
+func BytesBase64P(name, shorthand string, value []byte, usage string) *[]byte {
+	return CommandLine.BytesBase64P(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/count.go b/go/vendor/github.com/spf13/pflag/count.go
new file mode 100644
index 0000000..aa126e4
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/count.go
@@ -0,0 +1,96 @@
+package pflag
+
+import "strconv"
+
+// -- count Value
+type countValue int
+
+func newCountValue(val int, p *int) *countValue {
+	*p = val
+	return (*countValue)(p)
+}
+
+func (i *countValue) Set(s string) error {
+	// "+1" means that no specific value was passed, so increment
+	if s == "+1" {
+		*i = countValue(*i + 1)
+		return nil
+	}
+	v, err := strconv.ParseInt(s, 0, 0)
+	*i = countValue(v)
+	return err
+}
+
+func (i *countValue) Type() string {
+	return "count"
+}
+
+func (i *countValue) String() string { return strconv.Itoa(int(*i)) }
+
+func countConv(sval string) (interface{}, error) {
+	i, err := strconv.Atoi(sval)
+	if err != nil {
+		return nil, err
+	}
+	return i, nil
+}
+
+// GetCount return the int value of a flag with the given name
+func (f *FlagSet) GetCount(name string) (int, error) {
+	val, err := f.getFlagType(name, "count", countConv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int), nil
+}
+
+// CountVar defines a count flag with specified name, default value, and usage string.
+// The argument p points to an int variable in which to store the value of the flag.
+// A count flag will add 1 to its value evey time it is found on the command line
+func (f *FlagSet) CountVar(p *int, name string, usage string) {
+	f.CountVarP(p, name, "", usage)
+}
+
+// CountVarP is like CountVar only take a shorthand for the flag name.
+func (f *FlagSet) CountVarP(p *int, name, shorthand string, usage string) {
+	flag := f.VarPF(newCountValue(0, p), name, shorthand, usage)
+	flag.NoOptDefVal = "+1"
+}
+
+// CountVar like CountVar only the flag is placed on the CommandLine instead of a given flag set
+func CountVar(p *int, name string, usage string) {
+	CommandLine.CountVar(p, name, usage)
+}
+
+// CountVarP is like CountVar only take a shorthand for the flag name.
+func CountVarP(p *int, name, shorthand string, usage string) {
+	CommandLine.CountVarP(p, name, shorthand, usage)
+}
+
+// Count defines a count flag with specified name, default value, and usage string.
+// The return value is the address of an int variable that stores the value of the flag.
+// A count flag will add 1 to its value evey time it is found on the command line
+func (f *FlagSet) Count(name string, usage string) *int {
+	p := new(int)
+	f.CountVarP(p, name, "", usage)
+	return p
+}
+
+// CountP is like Count only takes a shorthand for the flag name.
+func (f *FlagSet) CountP(name, shorthand string, usage string) *int {
+	p := new(int)
+	f.CountVarP(p, name, shorthand, usage)
+	return p
+}
+
+// Count defines a count flag with specified name, default value, and usage string.
+// The return value is the address of an int variable that stores the value of the flag.
+// A count flag will add 1 to its value evey time it is found on the command line
+func Count(name string, usage string) *int {
+	return CommandLine.CountP(name, "", usage)
+}
+
+// CountP is like Count only takes a shorthand for the flag name.
+func CountP(name, shorthand string, usage string) *int {
+	return CommandLine.CountP(name, shorthand, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/duration.go b/go/vendor/github.com/spf13/pflag/duration.go
new file mode 100644
index 0000000..e9debef
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/duration.go
@@ -0,0 +1,86 @@
+package pflag
+
+import (
+	"time"
+)
+
+// -- time.Duration Value
+type durationValue time.Duration
+
+func newDurationValue(val time.Duration, p *time.Duration) *durationValue {
+	*p = val
+	return (*durationValue)(p)
+}
+
+func (d *durationValue) Set(s string) error {
+	v, err := time.ParseDuration(s)
+	*d = durationValue(v)
+	return err
+}
+
+func (d *durationValue) Type() string {
+	return "duration"
+}
+
+func (d *durationValue) String() string { return (*time.Duration)(d).String() }
+
+func durationConv(sval string) (interface{}, error) {
+	return time.ParseDuration(sval)
+}
+
+// GetDuration return the duration value of a flag with the given name
+func (f *FlagSet) GetDuration(name string) (time.Duration, error) {
+	val, err := f.getFlagType(name, "duration", durationConv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(time.Duration), nil
+}
+
+// DurationVar defines a time.Duration flag with specified name, default value, and usage string.
+// The argument p points to a time.Duration variable in which to store the value of the flag.
+func (f *FlagSet) DurationVar(p *time.Duration, name string, value time.Duration, usage string) {
+	f.VarP(newDurationValue(value, p), name, "", usage)
+}
+
+// DurationVarP is like DurationVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationVarP(p *time.Duration, name, shorthand string, value time.Duration, usage string) {
+	f.VarP(newDurationValue(value, p), name, shorthand, usage)
+}
+
+// DurationVar defines a time.Duration flag with specified name, default value, and usage string.
+// The argument p points to a time.Duration variable in which to store the value of the flag.
+func DurationVar(p *time.Duration, name string, value time.Duration, usage string) {
+	CommandLine.VarP(newDurationValue(value, p), name, "", usage)
+}
+
+// DurationVarP is like DurationVar, but accepts a shorthand letter that can be used after a single dash.
+func DurationVarP(p *time.Duration, name, shorthand string, value time.Duration, usage string) {
+	CommandLine.VarP(newDurationValue(value, p), name, shorthand, usage)
+}
+
+// Duration defines a time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a time.Duration variable that stores the value of the flag.
+func (f *FlagSet) Duration(name string, value time.Duration, usage string) *time.Duration {
+	p := new(time.Duration)
+	f.DurationVarP(p, name, "", value, usage)
+	return p
+}
+
+// DurationP is like Duration, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationP(name, shorthand string, value time.Duration, usage string) *time.Duration {
+	p := new(time.Duration)
+	f.DurationVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Duration defines a time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a time.Duration variable that stores the value of the flag.
+func Duration(name string, value time.Duration, usage string) *time.Duration {
+	return CommandLine.DurationP(name, "", value, usage)
+}
+
+// DurationP is like Duration, but accepts a shorthand letter that can be used after a single dash.
+func DurationP(name, shorthand string, value time.Duration, usage string) *time.Duration {
+	return CommandLine.DurationP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/duration_slice.go b/go/vendor/github.com/spf13/pflag/duration_slice.go
new file mode 100644
index 0000000..52c6b6d
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/duration_slice.go
@@ -0,0 +1,128 @@
+package pflag
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+// -- durationSlice Value
+type durationSliceValue struct {
+	value   *[]time.Duration
+	changed bool
+}
+
+func newDurationSliceValue(val []time.Duration, p *[]time.Duration) *durationSliceValue {
+	dsv := new(durationSliceValue)
+	dsv.value = p
+	*dsv.value = val
+	return dsv
+}
+
+func (s *durationSliceValue) Set(val string) error {
+	ss := strings.Split(val, ",")
+	out := make([]time.Duration, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = time.ParseDuration(d)
+		if err != nil {
+			return err
+		}
+
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *durationSliceValue) Type() string {
+	return "durationSlice"
+}
+
+func (s *durationSliceValue) String() string {
+	out := make([]string, len(*s.value))
+	for i, d := range *s.value {
+		out[i] = fmt.Sprintf("%s", d)
+	}
+	return "[" + strings.Join(out, ",") + "]"
+}
+
+func durationSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Empty string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []time.Duration{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]time.Duration, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = time.ParseDuration(d)
+		if err != nil {
+			return nil, err
+		}
+
+	}
+	return out, nil
+}
+
+// GetDurationSlice returns the []time.Duration value of a flag with the given name
+func (f *FlagSet) GetDurationSlice(name string) ([]time.Duration, error) {
+	val, err := f.getFlagType(name, "durationSlice", durationSliceConv)
+	if err != nil {
+		return []time.Duration{}, err
+	}
+	return val.([]time.Duration), nil
+}
+
+// DurationSliceVar defines a durationSlice flag with specified name, default value, and usage string.
+// The argument p points to a []time.Duration variable in which to store the value of the flag.
+func (f *FlagSet) DurationSliceVar(p *[]time.Duration, name string, value []time.Duration, usage string) {
+	f.VarP(newDurationSliceValue(value, p), name, "", usage)
+}
+
+// DurationSliceVarP is like DurationSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationSliceVarP(p *[]time.Duration, name, shorthand string, value []time.Duration, usage string) {
+	f.VarP(newDurationSliceValue(value, p), name, shorthand, usage)
+}
+
+// DurationSliceVar defines a duration[] flag with specified name, default value, and usage string.
+// The argument p points to a duration[] variable in which to store the value of the flag.
+func DurationSliceVar(p *[]time.Duration, name string, value []time.Duration, usage string) {
+	CommandLine.VarP(newDurationSliceValue(value, p), name, "", usage)
+}
+
+// DurationSliceVarP is like DurationSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func DurationSliceVarP(p *[]time.Duration, name, shorthand string, value []time.Duration, usage string) {
+	CommandLine.VarP(newDurationSliceValue(value, p), name, shorthand, usage)
+}
+
+// DurationSlice defines a []time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a []time.Duration variable that stores the value of the flag.
+func (f *FlagSet) DurationSlice(name string, value []time.Duration, usage string) *[]time.Duration {
+	p := []time.Duration{}
+	f.DurationSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// DurationSliceP is like DurationSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) DurationSliceP(name, shorthand string, value []time.Duration, usage string) *[]time.Duration {
+	p := []time.Duration{}
+	f.DurationSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// DurationSlice defines a []time.Duration flag with specified name, default value, and usage string.
+// The return value is the address of a []time.Duration variable that stores the value of the flag.
+func DurationSlice(name string, value []time.Duration, usage string) *[]time.Duration {
+	return CommandLine.DurationSliceP(name, "", value, usage)
+}
+
+// DurationSliceP is like DurationSlice, but accepts a shorthand letter that can be used after a single dash.
+func DurationSliceP(name, shorthand string, value []time.Duration, usage string) *[]time.Duration {
+	return CommandLine.DurationSliceP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/flag.go b/go/vendor/github.com/spf13/pflag/flag.go
new file mode 100644
index 0000000..9beeda8
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/flag.go
@@ -0,0 +1,1227 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package pflag is a drop-in replacement for Go's flag package, implementing
+POSIX/GNU-style --flags.
+
+pflag is compatible with the GNU extensions to the POSIX recommendations
+for command-line options. See
+http://www.gnu.org/software/libc/manual/html_node/Argument-Syntax.html
+
+Usage:
+
+pflag is a drop-in replacement of Go's native flag package. If you import
+pflag under the name "flag" then all code should continue to function
+with no changes.
+
+	import flag "github.com/spf13/pflag"
+
+There is one exception to this: if you directly instantiate the Flag struct
+there is one more field "Shorthand" that you will need to set.
+Most code never instantiates this struct directly, and instead uses
+functions such as String(), BoolVar(), and Var(), and is therefore
+unaffected.
+
+Define flags using flag.String(), Bool(), Int(), etc.
+
+This declares an integer flag, -flagname, stored in the pointer ip, with type *int.
+	var ip = flag.Int("flagname", 1234, "help message for flagname")
+If you like, you can bind the flag to a variable using the Var() functions.
+	var flagvar int
+	func init() {
+		flag.IntVar(&flagvar, "flagname", 1234, "help message for flagname")
+	}
+Or you can create custom flags that satisfy the Value interface (with
+pointer receivers) and couple them to flag parsing by
+	flag.Var(&flagVal, "name", "help message for flagname")
+For such flags, the default value is just the initial value of the variable.
+
+After all flags are defined, call
+	flag.Parse()
+to parse the command line into the defined flags.
+
+Flags may then be used directly. If you're using the flags themselves,
+they are all pointers; if you bind to variables, they're values.
+	fmt.Println("ip has value ", *ip)
+	fmt.Println("flagvar has value ", flagvar)
+
+After parsing, the arguments after the flag are available as the
+slice flag.Args() or individually as flag.Arg(i).
+The arguments are indexed from 0 through flag.NArg()-1.
+
+The pflag package also defines some new functions that are not in flag,
+that give one-letter shorthands for flags. You can use these by appending
+'P' to the name of any function that defines a flag.
+	var ip = flag.IntP("flagname", "f", 1234, "help message")
+	var flagvar bool
+	func init() {
+		flag.BoolVarP("boolname", "b", true, "help message")
+	}
+	flag.VarP(&flagVar, "varname", "v", 1234, "help message")
+Shorthand letters can be used with single dashes on the command line.
+Boolean shorthand flags can be combined with other shorthand flags.
+
+Command line flag syntax:
+	--flag    // boolean flags only
+	--flag=x
+
+Unlike the flag package, a single dash before an option means something
+different than a double dash. Single dashes signify a series of shorthand
+letters for flags. All but the last shorthand letter must be boolean flags.
+	// boolean flags
+	-f
+	-abc
+	// non-boolean flags
+	-n 1234
+	-Ifile
+	// mixed
+	-abcs "hello"
+	-abcn1234
+
+Flag parsing stops after the terminator "--". Unlike the flag package,
+flags can be interspersed with arguments anywhere on the command line
+before this terminator.
+
+Integer flags accept 1234, 0664, 0x1234 and may be negative.
+Boolean flags (in their long form) accept 1, 0, t, f, true, false,
+TRUE, FALSE, True, False.
+Duration flags accept any input valid for time.ParseDuration.
+
+The default set of command-line flags is controlled by
+top-level functions.  The FlagSet type allows one to define
+independent sets of flags, such as to implement subcommands
+in a command-line interface. The methods of FlagSet are
+analogous to the top-level functions for the command-line
+flag set.
+*/
+package pflag
+
+import (
+	"bytes"
+	"errors"
+	goflag "flag"
+	"fmt"
+	"io"
+	"os"
+	"sort"
+	"strings"
+)
+
+// ErrHelp is the error returned if the flag -help is invoked but no such flag is defined.
+var ErrHelp = errors.New("pflag: help requested")
+
+// ErrorHandling defines how to handle flag parsing errors.
+type ErrorHandling int
+
+const (
+	// ContinueOnError will return an err from Parse() if an error is found
+	ContinueOnError ErrorHandling = iota
+	// ExitOnError will call os.Exit(2) if an error is found when parsing
+	ExitOnError
+	// PanicOnError will panic() if an error is found when parsing flags
+	PanicOnError
+)
+
+// ParseErrorsWhitelist defines the parsing errors that can be ignored
+type ParseErrorsWhitelist struct {
+	// UnknownFlags will ignore unknown flags errors and continue parsing rest of the flags
+	UnknownFlags bool
+}
+
+// NormalizedName is a flag name that has been normalized according to rules
+// for the FlagSet (e.g. making '-' and '_' equivalent).
+type NormalizedName string
+
+// A FlagSet represents a set of defined flags.
+type FlagSet struct {
+	// Usage is the function called when an error occurs while parsing flags.
+	// The field is a function (not a method) that may be changed to point to
+	// a custom error handler.
+	Usage func()
+
+	// SortFlags is used to indicate, if user wants to have sorted flags in
+	// help/usage messages.
+	SortFlags bool
+
+	// ParseErrorsWhitelist is used to configure a whitelist of errors
+	ParseErrorsWhitelist ParseErrorsWhitelist
+
+	name              string
+	parsed            bool
+	actual            map[NormalizedName]*Flag
+	orderedActual     []*Flag
+	sortedActual      []*Flag
+	formal            map[NormalizedName]*Flag
+	orderedFormal     []*Flag
+	sortedFormal      []*Flag
+	shorthands        map[byte]*Flag
+	args              []string // arguments after flags
+	argsLenAtDash     int      // len(args) when a '--' was located when parsing, or -1 if no --
+	errorHandling     ErrorHandling
+	output            io.Writer // nil means stderr; use out() accessor
+	interspersed      bool      // allow interspersed option/non-option args
+	normalizeNameFunc func(f *FlagSet, name string) NormalizedName
+
+	addedGoFlagSets []*goflag.FlagSet
+}
+
+// A Flag represents the state of a flag.
+type Flag struct {
+	Name                string              // name as it appears on command line
+	Shorthand           string              // one-letter abbreviated flag
+	Usage               string              // help message
+	Value               Value               // value as set
+	DefValue            string              // default value (as text); for usage message
+	Changed             bool                // If the user set the value (or if left to default)
+	NoOptDefVal         string              // default value (as text); if the flag is on the command line without any options
+	Deprecated          string              // If this flag is deprecated, this string is the new or now thing to use
+	Hidden              bool                // used by cobra.Command to allow flags to be hidden from help/usage text
+	ShorthandDeprecated string              // If the shorthand of this flag is deprecated, this string is the new or now thing to use
+	Annotations         map[string][]string // used by cobra.Command bash autocomple code
+}
+
+// Value is the interface to the dynamic value stored in a flag.
+// (The default value is represented as a string.)
+type Value interface {
+	String() string
+	Set(string) error
+	Type() string
+}
+
+// sortFlags returns the flags as a slice in lexicographical sorted order.
+func sortFlags(flags map[NormalizedName]*Flag) []*Flag {
+	list := make(sort.StringSlice, len(flags))
+	i := 0
+	for k := range flags {
+		list[i] = string(k)
+		i++
+	}
+	list.Sort()
+	result := make([]*Flag, len(list))
+	for i, name := range list {
+		result[i] = flags[NormalizedName(name)]
+	}
+	return result
+}
+
+// SetNormalizeFunc allows you to add a function which can translate flag names.
+// Flags added to the FlagSet will be translated and then when anything tries to
+// look up the flag that will also be translated. So it would be possible to create
+// a flag named "getURL" and have it translated to "geturl".  A user could then pass
+// "--getUrl" which may also be translated to "geturl" and everything will work.
+func (f *FlagSet) SetNormalizeFunc(n func(f *FlagSet, name string) NormalizedName) {
+	f.normalizeNameFunc = n
+	f.sortedFormal = f.sortedFormal[:0]
+	for fname, flag := range f.formal {
+		nname := f.normalizeFlagName(flag.Name)
+		if fname == nname {
+			continue
+		}
+		flag.Name = string(nname)
+		delete(f.formal, fname)
+		f.formal[nname] = flag
+		if _, set := f.actual[fname]; set {
+			delete(f.actual, fname)
+			f.actual[nname] = flag
+		}
+	}
+}
+
+// GetNormalizeFunc returns the previously set NormalizeFunc of a function which
+// does no translation, if not set previously.
+func (f *FlagSet) GetNormalizeFunc() func(f *FlagSet, name string) NormalizedName {
+	if f.normalizeNameFunc != nil {
+		return f.normalizeNameFunc
+	}
+	return func(f *FlagSet, name string) NormalizedName { return NormalizedName(name) }
+}
+
+func (f *FlagSet) normalizeFlagName(name string) NormalizedName {
+	n := f.GetNormalizeFunc()
+	return n(f, name)
+}
+
+func (f *FlagSet) out() io.Writer {
+	if f.output == nil {
+		return os.Stderr
+	}
+	return f.output
+}
+
+// SetOutput sets the destination for usage and error messages.
+// If output is nil, os.Stderr is used.
+func (f *FlagSet) SetOutput(output io.Writer) {
+	f.output = output
+}
+
+// VisitAll visits the flags in lexicographical order or
+// in primordial order if f.SortFlags is false, calling fn for each.
+// It visits all flags, even those not set.
+func (f *FlagSet) VisitAll(fn func(*Flag)) {
+	if len(f.formal) == 0 {
+		return
+	}
+
+	var flags []*Flag
+	if f.SortFlags {
+		if len(f.formal) != len(f.sortedFormal) {
+			f.sortedFormal = sortFlags(f.formal)
+		}
+		flags = f.sortedFormal
+	} else {
+		flags = f.orderedFormal
+	}
+
+	for _, flag := range flags {
+		fn(flag)
+	}
+}
+
+// HasFlags returns a bool to indicate if the FlagSet has any flags defined.
+func (f *FlagSet) HasFlags() bool {
+	return len(f.formal) > 0
+}
+
+// HasAvailableFlags returns a bool to indicate if the FlagSet has any flags
+// that are not hidden.
+func (f *FlagSet) HasAvailableFlags() bool {
+	for _, flag := range f.formal {
+		if !flag.Hidden {
+			return true
+		}
+	}
+	return false
+}
+
+// VisitAll visits the command-line flags in lexicographical order or
+// in primordial order if f.SortFlags is false, calling fn for each.
+// It visits all flags, even those not set.
+func VisitAll(fn func(*Flag)) {
+	CommandLine.VisitAll(fn)
+}
+
+// Visit visits the flags in lexicographical order or
+// in primordial order if f.SortFlags is false, calling fn for each.
+// It visits only those flags that have been set.
+func (f *FlagSet) Visit(fn func(*Flag)) {
+	if len(f.actual) == 0 {
+		return
+	}
+
+	var flags []*Flag
+	if f.SortFlags {
+		if len(f.actual) != len(f.sortedActual) {
+			f.sortedActual = sortFlags(f.actual)
+		}
+		flags = f.sortedActual
+	} else {
+		flags = f.orderedActual
+	}
+
+	for _, flag := range flags {
+		fn(flag)
+	}
+}
+
+// Visit visits the command-line flags in lexicographical order or
+// in primordial order if f.SortFlags is false, calling fn for each.
+// It visits only those flags that have been set.
+func Visit(fn func(*Flag)) {
+	CommandLine.Visit(fn)
+}
+
+// Lookup returns the Flag structure of the named flag, returning nil if none exists.
+func (f *FlagSet) Lookup(name string) *Flag {
+	return f.lookup(f.normalizeFlagName(name))
+}
+
+// ShorthandLookup returns the Flag structure of the short handed flag,
+// returning nil if none exists.
+// It panics, if len(name) > 1.
+func (f *FlagSet) ShorthandLookup(name string) *Flag {
+	if name == "" {
+		return nil
+	}
+	if len(name) > 1 {
+		msg := fmt.Sprintf("can not look up shorthand which is more than one ASCII character: %q", name)
+		fmt.Fprintf(f.out(), msg)
+		panic(msg)
+	}
+	c := name[0]
+	return f.shorthands[c]
+}
+
+// lookup returns the Flag structure of the named flag, returning nil if none exists.
+func (f *FlagSet) lookup(name NormalizedName) *Flag {
+	return f.formal[name]
+}
+
+// func to return a given type for a given flag name
+func (f *FlagSet) getFlagType(name string, ftype string, convFunc func(sval string) (interface{}, error)) (interface{}, error) {
+	flag := f.Lookup(name)
+	if flag == nil {
+		err := fmt.Errorf("flag accessed but not defined: %s", name)
+		return nil, err
+	}
+
+	if flag.Value.Type() != ftype {
+		err := fmt.Errorf("trying to get %s value of flag of type %s", ftype, flag.Value.Type())
+		return nil, err
+	}
+
+	sval := flag.Value.String()
+	result, err := convFunc(sval)
+	if err != nil {
+		return nil, err
+	}
+	return result, nil
+}
+
+// ArgsLenAtDash will return the length of f.Args at the moment when a -- was
+// found during arg parsing. This allows your program to know which args were
+// before the -- and which came after.
+func (f *FlagSet) ArgsLenAtDash() int {
+	return f.argsLenAtDash
+}
+
+// MarkDeprecated indicated that a flag is deprecated in your program. It will
+// continue to function but will not show up in help or usage messages. Using
+// this flag will also print the given usageMessage.
+func (f *FlagSet) MarkDeprecated(name string, usageMessage string) error {
+	flag := f.Lookup(name)
+	if flag == nil {
+		return fmt.Errorf("flag %q does not exist", name)
+	}
+	if usageMessage == "" {
+		return fmt.Errorf("deprecated message for flag %q must be set", name)
+	}
+	flag.Deprecated = usageMessage
+	flag.Hidden = true
+	return nil
+}
+
+// MarkShorthandDeprecated will mark the shorthand of a flag deprecated in your
+// program. It will continue to function but will not show up in help or usage
+// messages. Using this flag will also print the given usageMessage.
+func (f *FlagSet) MarkShorthandDeprecated(name string, usageMessage string) error {
+	flag := f.Lookup(name)
+	if flag == nil {
+		return fmt.Errorf("flag %q does not exist", name)
+	}
+	if usageMessage == "" {
+		return fmt.Errorf("deprecated message for flag %q must be set", name)
+	}
+	flag.ShorthandDeprecated = usageMessage
+	return nil
+}
+
+// MarkHidden sets a flag to 'hidden' in your program. It will continue to
+// function but will not show up in help or usage messages.
+func (f *FlagSet) MarkHidden(name string) error {
+	flag := f.Lookup(name)
+	if flag == nil {
+		return fmt.Errorf("flag %q does not exist", name)
+	}
+	flag.Hidden = true
+	return nil
+}
+
+// Lookup returns the Flag structure of the named command-line flag,
+// returning nil if none exists.
+func Lookup(name string) *Flag {
+	return CommandLine.Lookup(name)
+}
+
+// ShorthandLookup returns the Flag structure of the short handed flag,
+// returning nil if none exists.
+func ShorthandLookup(name string) *Flag {
+	return CommandLine.ShorthandLookup(name)
+}
+
+// Set sets the value of the named flag.
+func (f *FlagSet) Set(name, value string) error {
+	normalName := f.normalizeFlagName(name)
+	flag, ok := f.formal[normalName]
+	if !ok {
+		return fmt.Errorf("no such flag -%v", name)
+	}
+
+	err := flag.Value.Set(value)
+	if err != nil {
+		var flagName string
+		if flag.Shorthand != "" && flag.ShorthandDeprecated == "" {
+			flagName = fmt.Sprintf("-%s, --%s", flag.Shorthand, flag.Name)
+		} else {
+			flagName = fmt.Sprintf("--%s", flag.Name)
+		}
+		return fmt.Errorf("invalid argument %q for %q flag: %v", value, flagName, err)
+	}
+
+	if !flag.Changed {
+		if f.actual == nil {
+			f.actual = make(map[NormalizedName]*Flag)
+		}
+		f.actual[normalName] = flag
+		f.orderedActual = append(f.orderedActual, flag)
+
+		flag.Changed = true
+	}
+
+	if flag.Deprecated != "" {
+		fmt.Fprintf(f.out(), "Flag --%s has been deprecated, %s\n", flag.Name, flag.Deprecated)
+	}
+	return nil
+}
+
+// SetAnnotation allows one to set arbitrary annotations on a flag in the FlagSet.
+// This is sometimes used by spf13/cobra programs which want to generate additional
+// bash completion information.
+func (f *FlagSet) SetAnnotation(name, key string, values []string) error {
+	normalName := f.normalizeFlagName(name)
+	flag, ok := f.formal[normalName]
+	if !ok {
+		return fmt.Errorf("no such flag -%v", name)
+	}
+	if flag.Annotations == nil {
+		flag.Annotations = map[string][]string{}
+	}
+	flag.Annotations[key] = values
+	return nil
+}
+
+// Changed returns true if the flag was explicitly set during Parse() and false
+// otherwise
+func (f *FlagSet) Changed(name string) bool {
+	flag := f.Lookup(name)
+	// If a flag doesn't exist, it wasn't changed....
+	if flag == nil {
+		return false
+	}
+	return flag.Changed
+}
+
+// Set sets the value of the named command-line flag.
+func Set(name, value string) error {
+	return CommandLine.Set(name, value)
+}
+
+// PrintDefaults prints, to standard error unless configured
+// otherwise, the default values of all defined flags in the set.
+func (f *FlagSet) PrintDefaults() {
+	usages := f.FlagUsages()
+	fmt.Fprint(f.out(), usages)
+}
+
+// defaultIsZeroValue returns true if the default value for this flag represents
+// a zero value.
+func (f *Flag) defaultIsZeroValue() bool {
+	switch f.Value.(type) {
+	case boolFlag:
+		return f.DefValue == "false"
+	case *durationValue:
+		// Beginning in Go 1.7, duration zero values are "0s"
+		return f.DefValue == "0" || f.DefValue == "0s"
+	case *intValue, *int8Value, *int32Value, *int64Value, *uintValue, *uint8Value, *uint16Value, *uint32Value, *uint64Value, *countValue, *float32Value, *float64Value:
+		return f.DefValue == "0"
+	case *stringValue:
+		return f.DefValue == ""
+	case *ipValue, *ipMaskValue, *ipNetValue:
+		return f.DefValue == "<nil>"
+	case *intSliceValue, *stringSliceValue, *stringArrayValue:
+		return f.DefValue == "[]"
+	default:
+		switch f.Value.String() {
+		case "false":
+			return true
+		case "<nil>":
+			return true
+		case "":
+			return true
+		case "0":
+			return true
+		}
+		return false
+	}
+}
+
+// UnquoteUsage extracts a back-quoted name from the usage
+// string for a flag and returns it and the un-quoted usage.
+// Given "a `name` to show" it returns ("name", "a name to show").
+// If there are no back quotes, the name is an educated guess of the
+// type of the flag's value, or the empty string if the flag is boolean.
+func UnquoteUsage(flag *Flag) (name string, usage string) {
+	// Look for a back-quoted name, but avoid the strings package.
+	usage = flag.Usage
+	for i := 0; i < len(usage); i++ {
+		if usage[i] == '`' {
+			for j := i + 1; j < len(usage); j++ {
+				if usage[j] == '`' {
+					name = usage[i+1 : j]
+					usage = usage[:i] + name + usage[j+1:]
+					return name, usage
+				}
+			}
+			break // Only one back quote; use type name.
+		}
+	}
+
+	name = flag.Value.Type()
+	switch name {
+	case "bool":
+		name = ""
+	case "float64":
+		name = "float"
+	case "int64":
+		name = "int"
+	case "uint64":
+		name = "uint"
+	case "stringSlice":
+		name = "strings"
+	case "intSlice":
+		name = "ints"
+	case "uintSlice":
+		name = "uints"
+	case "boolSlice":
+		name = "bools"
+	}
+
+	return
+}
+
+// Splits the string `s` on whitespace into an initial substring up to
+// `i` runes in length and the remainder. Will go `slop` over `i` if
+// that encompasses the entire string (which allows the caller to
+// avoid short orphan words on the final line).
+func wrapN(i, slop int, s string) (string, string) {
+	if i+slop > len(s) {
+		return s, ""
+	}
+
+	w := strings.LastIndexAny(s[:i], " \t\n")
+	if w <= 0 {
+		return s, ""
+	}
+	nlPos := strings.LastIndex(s[:i], "\n")
+	if nlPos > 0 && nlPos < w {
+		return s[:nlPos], s[nlPos+1:]
+	}
+	return s[:w], s[w+1:]
+}
+
+// Wraps the string `s` to a maximum width `w` with leading indent
+// `i`. The first line is not indented (this is assumed to be done by
+// caller). Pass `w` == 0 to do no wrapping
+func wrap(i, w int, s string) string {
+	if w == 0 {
+		return strings.Replace(s, "\n", "\n"+strings.Repeat(" ", i), -1)
+	}
+
+	// space between indent i and end of line width w into which
+	// we should wrap the text.
+	wrap := w - i
+
+	var r, l string
+
+	// Not enough space for sensible wrapping. Wrap as a block on
+	// the next line instead.
+	if wrap < 24 {
+		i = 16
+		wrap = w - i
+		r += "\n" + strings.Repeat(" ", i)
+	}
+	// If still not enough space then don't even try to wrap.
+	if wrap < 24 {
+		return strings.Replace(s, "\n", r, -1)
+	}
+
+	// Try to avoid short orphan words on the final line, by
+	// allowing wrapN to go a bit over if that would fit in the
+	// remainder of the line.
+	slop := 5
+	wrap = wrap - slop
+
+	// Handle first line, which is indented by the caller (or the
+	// special case above)
+	l, s = wrapN(wrap, slop, s)
+	r = r + strings.Replace(l, "\n", "\n"+strings.Repeat(" ", i), -1)
+
+	// Now wrap the rest
+	for s != "" {
+		var t string
+
+		t, s = wrapN(wrap, slop, s)
+		r = r + "\n" + strings.Repeat(" ", i) + strings.Replace(t, "\n", "\n"+strings.Repeat(" ", i), -1)
+	}
+
+	return r
+
+}
+
+// FlagUsagesWrapped returns a string containing the usage information
+// for all flags in the FlagSet. Wrapped to `cols` columns (0 for no
+// wrapping)
+func (f *FlagSet) FlagUsagesWrapped(cols int) string {
+	buf := new(bytes.Buffer)
+
+	lines := make([]string, 0, len(f.formal))
+
+	maxlen := 0
+	f.VisitAll(func(flag *Flag) {
+		if flag.Hidden {
+			return
+		}
+
+		line := ""
+		if flag.Shorthand != "" && flag.ShorthandDeprecated == "" {
+			line = fmt.Sprintf("  -%s, --%s", flag.Shorthand, flag.Name)
+		} else {
+			line = fmt.Sprintf("      --%s", flag.Name)
+		}
+
+		varname, usage := UnquoteUsage(flag)
+		if varname != "" {
+			line += " " + varname
+		}
+		if flag.NoOptDefVal != "" {
+			switch flag.Value.Type() {
+			case "string":
+				line += fmt.Sprintf("[=\"%s\"]", flag.NoOptDefVal)
+			case "bool":
+				if flag.NoOptDefVal != "true" {
+					line += fmt.Sprintf("[=%s]", flag.NoOptDefVal)
+				}
+			case "count":
+				if flag.NoOptDefVal != "+1" {
+					line += fmt.Sprintf("[=%s]", flag.NoOptDefVal)
+				}
+			default:
+				line += fmt.Sprintf("[=%s]", flag.NoOptDefVal)
+			}
+		}
+
+		// This special character will be replaced with spacing once the
+		// correct alignment is calculated
+		line += "\x00"
+		if len(line) > maxlen {
+			maxlen = len(line)
+		}
+
+		line += usage
+		if !flag.defaultIsZeroValue() {
+			if flag.Value.Type() == "string" {
+				line += fmt.Sprintf(" (default %q)", flag.DefValue)
+			} else {
+				line += fmt.Sprintf(" (default %s)", flag.DefValue)
+			}
+		}
+		if len(flag.Deprecated) != 0 {
+			line += fmt.Sprintf(" (DEPRECATED: %s)", flag.Deprecated)
+		}
+
+		lines = append(lines, line)
+	})
+
+	for _, line := range lines {
+		sidx := strings.Index(line, "\x00")
+		spacing := strings.Repeat(" ", maxlen-sidx)
+		// maxlen + 2 comes from + 1 for the \x00 and + 1 for the (deliberate) off-by-one in maxlen-sidx
+		fmt.Fprintln(buf, line[:sidx], spacing, wrap(maxlen+2, cols, line[sidx+1:]))
+	}
+
+	return buf.String()
+}
+
+// FlagUsages returns a string containing the usage information for all flags in
+// the FlagSet
+func (f *FlagSet) FlagUsages() string {
+	return f.FlagUsagesWrapped(0)
+}
+
+// PrintDefaults prints to standard error the default values of all defined command-line flags.
+func PrintDefaults() {
+	CommandLine.PrintDefaults()
+}
+
+// defaultUsage is the default function to print a usage message.
+func defaultUsage(f *FlagSet) {
+	fmt.Fprintf(f.out(), "Usage of %s:\n", f.name)
+	f.PrintDefaults()
+}
+
+// NOTE: Usage is not just defaultUsage(CommandLine)
+// because it serves (via godoc flag Usage) as the example
+// for how to write your own usage function.
+
+// Usage prints to standard error a usage message documenting all defined command-line flags.
+// The function is a variable that may be changed to point to a custom function.
+// By default it prints a simple header and calls PrintDefaults; for details about the
+// format of the output and how to control it, see the documentation for PrintDefaults.
+var Usage = func() {
+	fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
+	PrintDefaults()
+}
+
+// NFlag returns the number of flags that have been set.
+func (f *FlagSet) NFlag() int { return len(f.actual) }
+
+// NFlag returns the number of command-line flags that have been set.
+func NFlag() int { return len(CommandLine.actual) }
+
+// Arg returns the i'th argument.  Arg(0) is the first remaining argument
+// after flags have been processed.
+func (f *FlagSet) Arg(i int) string {
+	if i < 0 || i >= len(f.args) {
+		return ""
+	}
+	return f.args[i]
+}
+
+// Arg returns the i'th command-line argument.  Arg(0) is the first remaining argument
+// after flags have been processed.
+func Arg(i int) string {
+	return CommandLine.Arg(i)
+}
+
+// NArg is the number of arguments remaining after flags have been processed.
+func (f *FlagSet) NArg() int { return len(f.args) }
+
+// NArg is the number of arguments remaining after flags have been processed.
+func NArg() int { return len(CommandLine.args) }
+
+// Args returns the non-flag arguments.
+func (f *FlagSet) Args() []string { return f.args }
+
+// Args returns the non-flag command-line arguments.
+func Args() []string { return CommandLine.args }
+
+// Var defines a flag with the specified name and usage string. The type and
+// value of the flag are represented by the first argument, of type Value, which
+// typically holds a user-defined implementation of Value. For instance, the
+// caller could create a flag that turns a comma-separated string into a slice
+// of strings by giving the slice the methods of Value; in particular, Set would
+// decompose the comma-separated string into the slice.
+func (f *FlagSet) Var(value Value, name string, usage string) {
+	f.VarP(value, name, "", usage)
+}
+
+// VarPF is like VarP, but returns the flag created
+func (f *FlagSet) VarPF(value Value, name, shorthand, usage string) *Flag {
+	// Remember the default value as a string; it won't change.
+	flag := &Flag{
+		Name:      name,
+		Shorthand: shorthand,
+		Usage:     usage,
+		Value:     value,
+		DefValue:  value.String(),
+	}
+	f.AddFlag(flag)
+	return flag
+}
+
+// VarP is like Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) VarP(value Value, name, shorthand, usage string) {
+	f.VarPF(value, name, shorthand, usage)
+}
+
+// AddFlag will add the flag to the FlagSet
+func (f *FlagSet) AddFlag(flag *Flag) {
+	normalizedFlagName := f.normalizeFlagName(flag.Name)
+
+	_, alreadyThere := f.formal[normalizedFlagName]
+	if alreadyThere {
+		msg := fmt.Sprintf("%s flag redefined: %s", f.name, flag.Name)
+		fmt.Fprintln(f.out(), msg)
+		panic(msg) // Happens only if flags are declared with identical names
+	}
+	if f.formal == nil {
+		f.formal = make(map[NormalizedName]*Flag)
+	}
+
+	flag.Name = string(normalizedFlagName)
+	f.formal[normalizedFlagName] = flag
+	f.orderedFormal = append(f.orderedFormal, flag)
+
+	if flag.Shorthand == "" {
+		return
+	}
+	if len(flag.Shorthand) > 1 {
+		msg := fmt.Sprintf("%q shorthand is more than one ASCII character", flag.Shorthand)
+		fmt.Fprintf(f.out(), msg)
+		panic(msg)
+	}
+	if f.shorthands == nil {
+		f.shorthands = make(map[byte]*Flag)
+	}
+	c := flag.Shorthand[0]
+	used, alreadyThere := f.shorthands[c]
+	if alreadyThere {
+		msg := fmt.Sprintf("unable to redefine %q shorthand in %q flagset: it's already used for %q flag", c, f.name, used.Name)
+		fmt.Fprintf(f.out(), msg)
+		panic(msg)
+	}
+	f.shorthands[c] = flag
+}
+
+// AddFlagSet adds one FlagSet to another. If a flag is already present in f
+// the flag from newSet will be ignored.
+func (f *FlagSet) AddFlagSet(newSet *FlagSet) {
+	if newSet == nil {
+		return
+	}
+	newSet.VisitAll(func(flag *Flag) {
+		if f.Lookup(flag.Name) == nil {
+			f.AddFlag(flag)
+		}
+	})
+}
+
+// Var defines a flag with the specified name and usage string. The type and
+// value of the flag are represented by the first argument, of type Value, which
+// typically holds a user-defined implementation of Value. For instance, the
+// caller could create a flag that turns a comma-separated string into a slice
+// of strings by giving the slice the methods of Value; in particular, Set would
+// decompose the comma-separated string into the slice.
+func Var(value Value, name string, usage string) {
+	CommandLine.VarP(value, name, "", usage)
+}
+
+// VarP is like Var, but accepts a shorthand letter that can be used after a single dash.
+func VarP(value Value, name, shorthand, usage string) {
+	CommandLine.VarP(value, name, shorthand, usage)
+}
+
+// failf prints to standard error a formatted error and usage message and
+// returns the error.
+func (f *FlagSet) failf(format string, a ...interface{}) error {
+	err := fmt.Errorf(format, a...)
+	if f.errorHandling != ContinueOnError {
+		fmt.Fprintln(f.out(), err)
+		f.usage()
+	}
+	return err
+}
+
+// usage calls the Usage method for the flag set, or the usage function if
+// the flag set is CommandLine.
+func (f *FlagSet) usage() {
+	if f == CommandLine {
+		Usage()
+	} else if f.Usage == nil {
+		defaultUsage(f)
+	} else {
+		f.Usage()
+	}
+}
+
+//--unknown (args will be empty)
+//--unknown --next-flag ... (args will be --next-flag ...)
+//--unknown arg ... (args will be arg ...)
+func stripUnknownFlagValue(args []string) []string {
+	if len(args) == 0 {
+		//--unknown
+		return args
+	}
+
+	first := args[0]
+	if len(first) > 0 && first[0] == '-' {
+		//--unknown --next-flag ...
+		return args
+	}
+
+	//--unknown arg ... (args will be arg ...)
+	if len(args) > 1 {
+		return args[1:]
+	}
+	return nil
+}
+
+func (f *FlagSet) parseLongArg(s string, args []string, fn parseFunc) (a []string, err error) {
+	a = args
+	name := s[2:]
+	if len(name) == 0 || name[0] == '-' || name[0] == '=' {
+		err = f.failf("bad flag syntax: %s", s)
+		return
+	}
+
+	split := strings.SplitN(name, "=", 2)
+	name = split[0]
+	flag, exists := f.formal[f.normalizeFlagName(name)]
+
+	if !exists {
+		switch {
+		case name == "help":
+			f.usage()
+			return a, ErrHelp
+		case f.ParseErrorsWhitelist.UnknownFlags:
+			// --unknown=unknownval arg ...
+			// we do not want to lose arg in this case
+			if len(split) >= 2 {
+				return a, nil
+			}
+
+			return stripUnknownFlagValue(a), nil
+		default:
+			err = f.failf("unknown flag: --%s", name)
+			return
+		}
+	}
+
+	var value string
+	if len(split) == 2 {
+		// '--flag=arg'
+		value = split[1]
+	} else if flag.NoOptDefVal != "" {
+		// '--flag' (arg was optional)
+		value = flag.NoOptDefVal
+	} else if len(a) > 0 {
+		// '--flag arg'
+		value = a[0]
+		a = a[1:]
+	} else {
+		// '--flag' (arg was required)
+		err = f.failf("flag needs an argument: %s", s)
+		return
+	}
+
+	err = fn(flag, value)
+	if err != nil {
+		f.failf(err.Error())
+	}
+	return
+}
+
+func (f *FlagSet) parseSingleShortArg(shorthands string, args []string, fn parseFunc) (outShorts string, outArgs []string, err error) {
+	outArgs = args
+
+	if strings.HasPrefix(shorthands, "test.") {
+		return
+	}
+
+	outShorts = shorthands[1:]
+	c := shorthands[0]
+
+	flag, exists := f.shorthands[c]
+	if !exists {
+		switch {
+		case c == 'h':
+			f.usage()
+			err = ErrHelp
+			return
+		case f.ParseErrorsWhitelist.UnknownFlags:
+			// '-f=arg arg ...'
+			// we do not want to lose arg in this case
+			if len(shorthands) > 2 && shorthands[1] == '=' {
+				outShorts = ""
+				return
+			}
+
+			outArgs = stripUnknownFlagValue(outArgs)
+			return
+		default:
+			err = f.failf("unknown shorthand flag: %q in -%s", c, shorthands)
+			return
+		}
+	}
+
+	var value string
+	if len(shorthands) > 2 && shorthands[1] == '=' {
+		// '-f=arg'
+		value = shorthands[2:]
+		outShorts = ""
+	} else if flag.NoOptDefVal != "" {
+		// '-f' (arg was optional)
+		value = flag.NoOptDefVal
+	} else if len(shorthands) > 1 {
+		// '-farg'
+		value = shorthands[1:]
+		outShorts = ""
+	} else if len(args) > 0 {
+		// '-f arg'
+		value = args[0]
+		outArgs = args[1:]
+	} else {
+		// '-f' (arg was required)
+		err = f.failf("flag needs an argument: %q in -%s", c, shorthands)
+		return
+	}
+
+	if flag.ShorthandDeprecated != "" {
+		fmt.Fprintf(f.out(), "Flag shorthand -%s has been deprecated, %s\n", flag.Shorthand, flag.ShorthandDeprecated)
+	}
+
+	err = fn(flag, value)
+	if err != nil {
+		f.failf(err.Error())
+	}
+	return
+}
+
+func (f *FlagSet) parseShortArg(s string, args []string, fn parseFunc) (a []string, err error) {
+	a = args
+	shorthands := s[1:]
+
+	// "shorthands" can be a series of shorthand letters of flags (e.g. "-vvv").
+	for len(shorthands) > 0 {
+		shorthands, a, err = f.parseSingleShortArg(shorthands, args, fn)
+		if err != nil {
+			return
+		}
+	}
+
+	return
+}
+
+func (f *FlagSet) parseArgs(args []string, fn parseFunc) (err error) {
+	for len(args) > 0 {
+		s := args[0]
+		args = args[1:]
+		if len(s) == 0 || s[0] != '-' || len(s) == 1 {
+			if !f.interspersed {
+				f.args = append(f.args, s)
+				f.args = append(f.args, args...)
+				return nil
+			}
+			f.args = append(f.args, s)
+			continue
+		}
+
+		if s[1] == '-' {
+			if len(s) == 2 { // "--" terminates the flags
+				f.argsLenAtDash = len(f.args)
+				f.args = append(f.args, args...)
+				break
+			}
+			args, err = f.parseLongArg(s, args, fn)
+		} else {
+			args, err = f.parseShortArg(s, args, fn)
+		}
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+// Parse parses flag definitions from the argument list, which should not
+// include the command name.  Must be called after all flags in the FlagSet
+// are defined and before flags are accessed by the program.
+// The return value will be ErrHelp if -help was set but not defined.
+func (f *FlagSet) Parse(arguments []string) error {
+	if f.addedGoFlagSets != nil {
+		for _, goFlagSet := range f.addedGoFlagSets {
+			goFlagSet.Parse(nil)
+		}
+	}
+	f.parsed = true
+
+	if len(arguments) < 0 {
+		return nil
+	}
+
+	f.args = make([]string, 0, len(arguments))
+
+	set := func(flag *Flag, value string) error {
+		return f.Set(flag.Name, value)
+	}
+
+	err := f.parseArgs(arguments, set)
+	if err != nil {
+		switch f.errorHandling {
+		case ContinueOnError:
+			return err
+		case ExitOnError:
+			fmt.Println(err)
+			os.Exit(2)
+		case PanicOnError:
+			panic(err)
+		}
+	}
+	return nil
+}
+
+type parseFunc func(flag *Flag, value string) error
+
+// ParseAll parses flag definitions from the argument list, which should not
+// include the command name. The arguments for fn are flag and value. Must be
+// called after all flags in the FlagSet are defined and before flags are
+// accessed by the program. The return value will be ErrHelp if -help was set
+// but not defined.
+func (f *FlagSet) ParseAll(arguments []string, fn func(flag *Flag, value string) error) error {
+	f.parsed = true
+	f.args = make([]string, 0, len(arguments))
+
+	err := f.parseArgs(arguments, fn)
+	if err != nil {
+		switch f.errorHandling {
+		case ContinueOnError:
+			return err
+		case ExitOnError:
+			os.Exit(2)
+		case PanicOnError:
+			panic(err)
+		}
+	}
+	return nil
+}
+
+// Parsed reports whether f.Parse has been called.
+func (f *FlagSet) Parsed() bool {
+	return f.parsed
+}
+
+// Parse parses the command-line flags from os.Args[1:].  Must be called
+// after all flags are defined and before flags are accessed by the program.
+func Parse() {
+	// Ignore errors; CommandLine is set for ExitOnError.
+	CommandLine.Parse(os.Args[1:])
+}
+
+// ParseAll parses the command-line flags from os.Args[1:] and called fn for each.
+// The arguments for fn are flag and value. Must be called after all flags are
+// defined and before flags are accessed by the program.
+func ParseAll(fn func(flag *Flag, value string) error) {
+	// Ignore errors; CommandLine is set for ExitOnError.
+	CommandLine.ParseAll(os.Args[1:], fn)
+}
+
+// SetInterspersed sets whether to support interspersed option/non-option arguments.
+func SetInterspersed(interspersed bool) {
+	CommandLine.SetInterspersed(interspersed)
+}
+
+// Parsed returns true if the command-line flags have been parsed.
+func Parsed() bool {
+	return CommandLine.Parsed()
+}
+
+// CommandLine is the default set of command-line flags, parsed from os.Args.
+var CommandLine = NewFlagSet(os.Args[0], ExitOnError)
+
+// NewFlagSet returns a new, empty flag set with the specified name,
+// error handling property and SortFlags set to true.
+func NewFlagSet(name string, errorHandling ErrorHandling) *FlagSet {
+	f := &FlagSet{
+		name:          name,
+		errorHandling: errorHandling,
+		argsLenAtDash: -1,
+		interspersed:  true,
+		SortFlags:     true,
+	}
+	return f
+}
+
+// SetInterspersed sets whether to support interspersed option/non-option arguments.
+func (f *FlagSet) SetInterspersed(interspersed bool) {
+	f.interspersed = interspersed
+}
+
+// Init sets the name and error handling property for a flag set.
+// By default, the zero FlagSet uses an empty name and the
+// ContinueOnError error handling policy.
+func (f *FlagSet) Init(name string, errorHandling ErrorHandling) {
+	f.name = name
+	f.errorHandling = errorHandling
+	f.argsLenAtDash = -1
+}
diff --git a/go/vendor/github.com/spf13/pflag/float32.go b/go/vendor/github.com/spf13/pflag/float32.go
new file mode 100644
index 0000000..a243f81
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/float32.go
@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- float32 Value
+type float32Value float32
+
+func newFloat32Value(val float32, p *float32) *float32Value {
+	*p = val
+	return (*float32Value)(p)
+}
+
+func (f *float32Value) Set(s string) error {
+	v, err := strconv.ParseFloat(s, 32)
+	*f = float32Value(v)
+	return err
+}
+
+func (f *float32Value) Type() string {
+	return "float32"
+}
+
+func (f *float32Value) String() string { return strconv.FormatFloat(float64(*f), 'g', -1, 32) }
+
+func float32Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseFloat(sval, 32)
+	if err != nil {
+		return 0, err
+	}
+	return float32(v), nil
+}
+
+// GetFloat32 return the float32 value of a flag with the given name
+func (f *FlagSet) GetFloat32(name string) (float32, error) {
+	val, err := f.getFlagType(name, "float32", float32Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(float32), nil
+}
+
+// Float32Var defines a float32 flag with specified name, default value, and usage string.
+// The argument p points to a float32 variable in which to store the value of the flag.
+func (f *FlagSet) Float32Var(p *float32, name string, value float32, usage string) {
+	f.VarP(newFloat32Value(value, p), name, "", usage)
+}
+
+// Float32VarP is like Float32Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float32VarP(p *float32, name, shorthand string, value float32, usage string) {
+	f.VarP(newFloat32Value(value, p), name, shorthand, usage)
+}
+
+// Float32Var defines a float32 flag with specified name, default value, and usage string.
+// The argument p points to a float32 variable in which to store the value of the flag.
+func Float32Var(p *float32, name string, value float32, usage string) {
+	CommandLine.VarP(newFloat32Value(value, p), name, "", usage)
+}
+
+// Float32VarP is like Float32Var, but accepts a shorthand letter that can be used after a single dash.
+func Float32VarP(p *float32, name, shorthand string, value float32, usage string) {
+	CommandLine.VarP(newFloat32Value(value, p), name, shorthand, usage)
+}
+
+// Float32 defines a float32 flag with specified name, default value, and usage string.
+// The return value is the address of a float32 variable that stores the value of the flag.
+func (f *FlagSet) Float32(name string, value float32, usage string) *float32 {
+	p := new(float32)
+	f.Float32VarP(p, name, "", value, usage)
+	return p
+}
+
+// Float32P is like Float32, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float32P(name, shorthand string, value float32, usage string) *float32 {
+	p := new(float32)
+	f.Float32VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Float32 defines a float32 flag with specified name, default value, and usage string.
+// The return value is the address of a float32 variable that stores the value of the flag.
+func Float32(name string, value float32, usage string) *float32 {
+	return CommandLine.Float32P(name, "", value, usage)
+}
+
+// Float32P is like Float32, but accepts a shorthand letter that can be used after a single dash.
+func Float32P(name, shorthand string, value float32, usage string) *float32 {
+	return CommandLine.Float32P(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/float64.go b/go/vendor/github.com/spf13/pflag/float64.go
new file mode 100644
index 0000000..04b5492
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/float64.go
@@ -0,0 +1,84 @@
+package pflag
+
+import "strconv"
+
+// -- float64 Value
+type float64Value float64
+
+func newFloat64Value(val float64, p *float64) *float64Value {
+	*p = val
+	return (*float64Value)(p)
+}
+
+func (f *float64Value) Set(s string) error {
+	v, err := strconv.ParseFloat(s, 64)
+	*f = float64Value(v)
+	return err
+}
+
+func (f *float64Value) Type() string {
+	return "float64"
+}
+
+func (f *float64Value) String() string { return strconv.FormatFloat(float64(*f), 'g', -1, 64) }
+
+func float64Conv(sval string) (interface{}, error) {
+	return strconv.ParseFloat(sval, 64)
+}
+
+// GetFloat64 return the float64 value of a flag with the given name
+func (f *FlagSet) GetFloat64(name string) (float64, error) {
+	val, err := f.getFlagType(name, "float64", float64Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(float64), nil
+}
+
+// Float64Var defines a float64 flag with specified name, default value, and usage string.
+// The argument p points to a float64 variable in which to store the value of the flag.
+func (f *FlagSet) Float64Var(p *float64, name string, value float64, usage string) {
+	f.VarP(newFloat64Value(value, p), name, "", usage)
+}
+
+// Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
+	f.VarP(newFloat64Value(value, p), name, shorthand, usage)
+}
+
+// Float64Var defines a float64 flag with specified name, default value, and usage string.
+// The argument p points to a float64 variable in which to store the value of the flag.
+func Float64Var(p *float64, name string, value float64, usage string) {
+	CommandLine.VarP(newFloat64Value(value, p), name, "", usage)
+}
+
+// Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
+func Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
+	CommandLine.VarP(newFloat64Value(value, p), name, shorthand, usage)
+}
+
+// Float64 defines a float64 flag with specified name, default value, and usage string.
+// The return value is the address of a float64 variable that stores the value of the flag.
+func (f *FlagSet) Float64(name string, value float64, usage string) *float64 {
+	p := new(float64)
+	f.Float64VarP(p, name, "", value, usage)
+	return p
+}
+
+// Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float64P(name, shorthand string, value float64, usage string) *float64 {
+	p := new(float64)
+	f.Float64VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Float64 defines a float64 flag with specified name, default value, and usage string.
+// The return value is the address of a float64 variable that stores the value of the flag.
+func Float64(name string, value float64, usage string) *float64 {
+	return CommandLine.Float64P(name, "", value, usage)
+}
+
+// Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
+func Float64P(name, shorthand string, value float64, usage string) *float64 {
+	return CommandLine.Float64P(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/golangflag.go b/go/vendor/github.com/spf13/pflag/golangflag.go
new file mode 100644
index 0000000..d3dd72b
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/golangflag.go
@@ -0,0 +1,105 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pflag
+
+import (
+	goflag "flag"
+	"reflect"
+	"strings"
+)
+
+// flagValueWrapper implements pflag.Value around a flag.Value.  The main
+// difference here is the addition of the Type method that returns a string
+// name of the type.  As this is generally unknown, we approximate that with
+// reflection.
+type flagValueWrapper struct {
+	inner    goflag.Value
+	flagType string
+}
+
+// We are just copying the boolFlag interface out of goflag as that is what
+// they use to decide if a flag should get "true" when no arg is given.
+type goBoolFlag interface {
+	goflag.Value
+	IsBoolFlag() bool
+}
+
+func wrapFlagValue(v goflag.Value) Value {
+	// If the flag.Value happens to also be a pflag.Value, just use it directly.
+	if pv, ok := v.(Value); ok {
+		return pv
+	}
+
+	pv := &flagValueWrapper{
+		inner: v,
+	}
+
+	t := reflect.TypeOf(v)
+	if t.Kind() == reflect.Interface || t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+
+	pv.flagType = strings.TrimSuffix(t.Name(), "Value")
+	return pv
+}
+
+func (v *flagValueWrapper) String() string {
+	return v.inner.String()
+}
+
+func (v *flagValueWrapper) Set(s string) error {
+	return v.inner.Set(s)
+}
+
+func (v *flagValueWrapper) Type() string {
+	return v.flagType
+}
+
+// PFlagFromGoFlag will return a *pflag.Flag given a *flag.Flag
+// If the *flag.Flag.Name was a single character (ex: `v`) it will be accessiblei
+// with both `-v` and `--v` in flags. If the golang flag was more than a single
+// character (ex: `verbose`) it will only be accessible via `--verbose`
+func PFlagFromGoFlag(goflag *goflag.Flag) *Flag {
+	// Remember the default value as a string; it won't change.
+	flag := &Flag{
+		Name:  goflag.Name,
+		Usage: goflag.Usage,
+		Value: wrapFlagValue(goflag.Value),
+		// Looks like golang flags don't set DefValue correctly  :-(
+		//DefValue: goflag.DefValue,
+		DefValue: goflag.Value.String(),
+	}
+	// Ex: if the golang flag was -v, allow both -v and --v to work
+	if len(flag.Name) == 1 {
+		flag.Shorthand = flag.Name
+	}
+	if fv, ok := goflag.Value.(goBoolFlag); ok && fv.IsBoolFlag() {
+		flag.NoOptDefVal = "true"
+	}
+	return flag
+}
+
+// AddGoFlag will add the given *flag.Flag to the pflag.FlagSet
+func (f *FlagSet) AddGoFlag(goflag *goflag.Flag) {
+	if f.Lookup(goflag.Name) != nil {
+		return
+	}
+	newflag := PFlagFromGoFlag(goflag)
+	f.AddFlag(newflag)
+}
+
+// AddGoFlagSet will add the given *flag.FlagSet to the pflag.FlagSet
+func (f *FlagSet) AddGoFlagSet(newSet *goflag.FlagSet) {
+	if newSet == nil {
+		return
+	}
+	newSet.VisitAll(func(goflag *goflag.Flag) {
+		f.AddGoFlag(goflag)
+	})
+	if f.addedGoFlagSets == nil {
+		f.addedGoFlagSets = make([]*goflag.FlagSet, 0)
+	}
+	f.addedGoFlagSets = append(f.addedGoFlagSets, newSet)
+}
diff --git a/go/vendor/github.com/spf13/pflag/int.go b/go/vendor/github.com/spf13/pflag/int.go
new file mode 100644
index 0000000..1474b89
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/int.go
@@ -0,0 +1,84 @@
+package pflag
+
+import "strconv"
+
+// -- int Value
+type intValue int
+
+func newIntValue(val int, p *int) *intValue {
+	*p = val
+	return (*intValue)(p)
+}
+
+func (i *intValue) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 64)
+	*i = intValue(v)
+	return err
+}
+
+func (i *intValue) Type() string {
+	return "int"
+}
+
+func (i *intValue) String() string { return strconv.Itoa(int(*i)) }
+
+func intConv(sval string) (interface{}, error) {
+	return strconv.Atoi(sval)
+}
+
+// GetInt return the int value of a flag with the given name
+func (f *FlagSet) GetInt(name string) (int, error) {
+	val, err := f.getFlagType(name, "int", intConv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int), nil
+}
+
+// IntVar defines an int flag with specified name, default value, and usage string.
+// The argument p points to an int variable in which to store the value of the flag.
+func (f *FlagSet) IntVar(p *int, name string, value int, usage string) {
+	f.VarP(newIntValue(value, p), name, "", usage)
+}
+
+// IntVarP is like IntVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntVarP(p *int, name, shorthand string, value int, usage string) {
+	f.VarP(newIntValue(value, p), name, shorthand, usage)
+}
+
+// IntVar defines an int flag with specified name, default value, and usage string.
+// The argument p points to an int variable in which to store the value of the flag.
+func IntVar(p *int, name string, value int, usage string) {
+	CommandLine.VarP(newIntValue(value, p), name, "", usage)
+}
+
+// IntVarP is like IntVar, but accepts a shorthand letter that can be used after a single dash.
+func IntVarP(p *int, name, shorthand string, value int, usage string) {
+	CommandLine.VarP(newIntValue(value, p), name, shorthand, usage)
+}
+
+// Int defines an int flag with specified name, default value, and usage string.
+// The return value is the address of an int variable that stores the value of the flag.
+func (f *FlagSet) Int(name string, value int, usage string) *int {
+	p := new(int)
+	f.IntVarP(p, name, "", value, usage)
+	return p
+}
+
+// IntP is like Int, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntP(name, shorthand string, value int, usage string) *int {
+	p := new(int)
+	f.IntVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int defines an int flag with specified name, default value, and usage string.
+// The return value is the address of an int variable that stores the value of the flag.
+func Int(name string, value int, usage string) *int {
+	return CommandLine.IntP(name, "", value, usage)
+}
+
+// IntP is like Int, but accepts a shorthand letter that can be used after a single dash.
+func IntP(name, shorthand string, value int, usage string) *int {
+	return CommandLine.IntP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/int16.go b/go/vendor/github.com/spf13/pflag/int16.go
new file mode 100644
index 0000000..f1a01d0
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/int16.go
@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- int16 Value
+type int16Value int16
+
+func newInt16Value(val int16, p *int16) *int16Value {
+	*p = val
+	return (*int16Value)(p)
+}
+
+func (i *int16Value) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 16)
+	*i = int16Value(v)
+	return err
+}
+
+func (i *int16Value) Type() string {
+	return "int16"
+}
+
+func (i *int16Value) String() string { return strconv.FormatInt(int64(*i), 10) }
+
+func int16Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseInt(sval, 0, 16)
+	if err != nil {
+		return 0, err
+	}
+	return int16(v), nil
+}
+
+// GetInt16 returns the int16 value of a flag with the given name
+func (f *FlagSet) GetInt16(name string) (int16, error) {
+	val, err := f.getFlagType(name, "int16", int16Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int16), nil
+}
+
+// Int16Var defines an int16 flag with specified name, default value, and usage string.
+// The argument p points to an int16 variable in which to store the value of the flag.
+func (f *FlagSet) Int16Var(p *int16, name string, value int16, usage string) {
+	f.VarP(newInt16Value(value, p), name, "", usage)
+}
+
+// Int16VarP is like Int16Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int16VarP(p *int16, name, shorthand string, value int16, usage string) {
+	f.VarP(newInt16Value(value, p), name, shorthand, usage)
+}
+
+// Int16Var defines an int16 flag with specified name, default value, and usage string.
+// The argument p points to an int16 variable in which to store the value of the flag.
+func Int16Var(p *int16, name string, value int16, usage string) {
+	CommandLine.VarP(newInt16Value(value, p), name, "", usage)
+}
+
+// Int16VarP is like Int16Var, but accepts a shorthand letter that can be used after a single dash.
+func Int16VarP(p *int16, name, shorthand string, value int16, usage string) {
+	CommandLine.VarP(newInt16Value(value, p), name, shorthand, usage)
+}
+
+// Int16 defines an int16 flag with specified name, default value, and usage string.
+// The return value is the address of an int16 variable that stores the value of the flag.
+func (f *FlagSet) Int16(name string, value int16, usage string) *int16 {
+	p := new(int16)
+	f.Int16VarP(p, name, "", value, usage)
+	return p
+}
+
+// Int16P is like Int16, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int16P(name, shorthand string, value int16, usage string) *int16 {
+	p := new(int16)
+	f.Int16VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int16 defines an int16 flag with specified name, default value, and usage string.
+// The return value is the address of an int16 variable that stores the value of the flag.
+func Int16(name string, value int16, usage string) *int16 {
+	return CommandLine.Int16P(name, "", value, usage)
+}
+
+// Int16P is like Int16, but accepts a shorthand letter that can be used after a single dash.
+func Int16P(name, shorthand string, value int16, usage string) *int16 {
+	return CommandLine.Int16P(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/int32.go b/go/vendor/github.com/spf13/pflag/int32.go
new file mode 100644
index 0000000..9b95944
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/int32.go
@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- int32 Value
+type int32Value int32
+
+func newInt32Value(val int32, p *int32) *int32Value {
+	*p = val
+	return (*int32Value)(p)
+}
+
+func (i *int32Value) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 32)
+	*i = int32Value(v)
+	return err
+}
+
+func (i *int32Value) Type() string {
+	return "int32"
+}
+
+func (i *int32Value) String() string { return strconv.FormatInt(int64(*i), 10) }
+
+func int32Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseInt(sval, 0, 32)
+	if err != nil {
+		return 0, err
+	}
+	return int32(v), nil
+}
+
+// GetInt32 return the int32 value of a flag with the given name
+func (f *FlagSet) GetInt32(name string) (int32, error) {
+	val, err := f.getFlagType(name, "int32", int32Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int32), nil
+}
+
+// Int32Var defines an int32 flag with specified name, default value, and usage string.
+// The argument p points to an int32 variable in which to store the value of the flag.
+func (f *FlagSet) Int32Var(p *int32, name string, value int32, usage string) {
+	f.VarP(newInt32Value(value, p), name, "", usage)
+}
+
+// Int32VarP is like Int32Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int32VarP(p *int32, name, shorthand string, value int32, usage string) {
+	f.VarP(newInt32Value(value, p), name, shorthand, usage)
+}
+
+// Int32Var defines an int32 flag with specified name, default value, and usage string.
+// The argument p points to an int32 variable in which to store the value of the flag.
+func Int32Var(p *int32, name string, value int32, usage string) {
+	CommandLine.VarP(newInt32Value(value, p), name, "", usage)
+}
+
+// Int32VarP is like Int32Var, but accepts a shorthand letter that can be used after a single dash.
+func Int32VarP(p *int32, name, shorthand string, value int32, usage string) {
+	CommandLine.VarP(newInt32Value(value, p), name, shorthand, usage)
+}
+
+// Int32 defines an int32 flag with specified name, default value, and usage string.
+// The return value is the address of an int32 variable that stores the value of the flag.
+func (f *FlagSet) Int32(name string, value int32, usage string) *int32 {
+	p := new(int32)
+	f.Int32VarP(p, name, "", value, usage)
+	return p
+}
+
+// Int32P is like Int32, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int32P(name, shorthand string, value int32, usage string) *int32 {
+	p := new(int32)
+	f.Int32VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int32 defines an int32 flag with specified name, default value, and usage string.
+// The return value is the address of an int32 variable that stores the value of the flag.
+func Int32(name string, value int32, usage string) *int32 {
+	return CommandLine.Int32P(name, "", value, usage)
+}
+
+// Int32P is like Int32, but accepts a shorthand letter that can be used after a single dash.
+func Int32P(name, shorthand string, value int32, usage string) *int32 {
+	return CommandLine.Int32P(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/int64.go b/go/vendor/github.com/spf13/pflag/int64.go
new file mode 100644
index 0000000..0026d78
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/int64.go
@@ -0,0 +1,84 @@
+package pflag
+
+import "strconv"
+
+// -- int64 Value
+type int64Value int64
+
+func newInt64Value(val int64, p *int64) *int64Value {
+	*p = val
+	return (*int64Value)(p)
+}
+
+func (i *int64Value) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 64)
+	*i = int64Value(v)
+	return err
+}
+
+func (i *int64Value) Type() string {
+	return "int64"
+}
+
+func (i *int64Value) String() string { return strconv.FormatInt(int64(*i), 10) }
+
+func int64Conv(sval string) (interface{}, error) {
+	return strconv.ParseInt(sval, 0, 64)
+}
+
+// GetInt64 return the int64 value of a flag with the given name
+func (f *FlagSet) GetInt64(name string) (int64, error) {
+	val, err := f.getFlagType(name, "int64", int64Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int64), nil
+}
+
+// Int64Var defines an int64 flag with specified name, default value, and usage string.
+// The argument p points to an int64 variable in which to store the value of the flag.
+func (f *FlagSet) Int64Var(p *int64, name string, value int64, usage string) {
+	f.VarP(newInt64Value(value, p), name, "", usage)
+}
+
+// Int64VarP is like Int64Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int64VarP(p *int64, name, shorthand string, value int64, usage string) {
+	f.VarP(newInt64Value(value, p), name, shorthand, usage)
+}
+
+// Int64Var defines an int64 flag with specified name, default value, and usage string.
+// The argument p points to an int64 variable in which to store the value of the flag.
+func Int64Var(p *int64, name string, value int64, usage string) {
+	CommandLine.VarP(newInt64Value(value, p), name, "", usage)
+}
+
+// Int64VarP is like Int64Var, but accepts a shorthand letter that can be used after a single dash.
+func Int64VarP(p *int64, name, shorthand string, value int64, usage string) {
+	CommandLine.VarP(newInt64Value(value, p), name, shorthand, usage)
+}
+
+// Int64 defines an int64 flag with specified name, default value, and usage string.
+// The return value is the address of an int64 variable that stores the value of the flag.
+func (f *FlagSet) Int64(name string, value int64, usage string) *int64 {
+	p := new(int64)
+	f.Int64VarP(p, name, "", value, usage)
+	return p
+}
+
+// Int64P is like Int64, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int64P(name, shorthand string, value int64, usage string) *int64 {
+	p := new(int64)
+	f.Int64VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int64 defines an int64 flag with specified name, default value, and usage string.
+// The return value is the address of an int64 variable that stores the value of the flag.
+func Int64(name string, value int64, usage string) *int64 {
+	return CommandLine.Int64P(name, "", value, usage)
+}
+
+// Int64P is like Int64, but accepts a shorthand letter that can be used after a single dash.
+func Int64P(name, shorthand string, value int64, usage string) *int64 {
+	return CommandLine.Int64P(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/int8.go b/go/vendor/github.com/spf13/pflag/int8.go
new file mode 100644
index 0000000..4da9222
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/int8.go
@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- int8 Value
+type int8Value int8
+
+func newInt8Value(val int8, p *int8) *int8Value {
+	*p = val
+	return (*int8Value)(p)
+}
+
+func (i *int8Value) Set(s string) error {
+	v, err := strconv.ParseInt(s, 0, 8)
+	*i = int8Value(v)
+	return err
+}
+
+func (i *int8Value) Type() string {
+	return "int8"
+}
+
+func (i *int8Value) String() string { return strconv.FormatInt(int64(*i), 10) }
+
+func int8Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseInt(sval, 0, 8)
+	if err != nil {
+		return 0, err
+	}
+	return int8(v), nil
+}
+
+// GetInt8 return the int8 value of a flag with the given name
+func (f *FlagSet) GetInt8(name string) (int8, error) {
+	val, err := f.getFlagType(name, "int8", int8Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(int8), nil
+}
+
+// Int8Var defines an int8 flag with specified name, default value, and usage string.
+// The argument p points to an int8 variable in which to store the value of the flag.
+func (f *FlagSet) Int8Var(p *int8, name string, value int8, usage string) {
+	f.VarP(newInt8Value(value, p), name, "", usage)
+}
+
+// Int8VarP is like Int8Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int8VarP(p *int8, name, shorthand string, value int8, usage string) {
+	f.VarP(newInt8Value(value, p), name, shorthand, usage)
+}
+
+// Int8Var defines an int8 flag with specified name, default value, and usage string.
+// The argument p points to an int8 variable in which to store the value of the flag.
+func Int8Var(p *int8, name string, value int8, usage string) {
+	CommandLine.VarP(newInt8Value(value, p), name, "", usage)
+}
+
+// Int8VarP is like Int8Var, but accepts a shorthand letter that can be used after a single dash.
+func Int8VarP(p *int8, name, shorthand string, value int8, usage string) {
+	CommandLine.VarP(newInt8Value(value, p), name, shorthand, usage)
+}
+
+// Int8 defines an int8 flag with specified name, default value, and usage string.
+// The return value is the address of an int8 variable that stores the value of the flag.
+func (f *FlagSet) Int8(name string, value int8, usage string) *int8 {
+	p := new(int8)
+	f.Int8VarP(p, name, "", value, usage)
+	return p
+}
+
+// Int8P is like Int8, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Int8P(name, shorthand string, value int8, usage string) *int8 {
+	p := new(int8)
+	f.Int8VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Int8 defines an int8 flag with specified name, default value, and usage string.
+// The return value is the address of an int8 variable that stores the value of the flag.
+func Int8(name string, value int8, usage string) *int8 {
+	return CommandLine.Int8P(name, "", value, usage)
+}
+
+// Int8P is like Int8, but accepts a shorthand letter that can be used after a single dash.
+func Int8P(name, shorthand string, value int8, usage string) *int8 {
+	return CommandLine.Int8P(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/int_slice.go b/go/vendor/github.com/spf13/pflag/int_slice.go
new file mode 100644
index 0000000..1e7c9ed
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/int_slice.go
@@ -0,0 +1,128 @@
+package pflag
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// -- intSlice Value
+type intSliceValue struct {
+	value   *[]int
+	changed bool
+}
+
+func newIntSliceValue(val []int, p *[]int) *intSliceValue {
+	isv := new(intSliceValue)
+	isv.value = p
+	*isv.value = val
+	return isv
+}
+
+func (s *intSliceValue) Set(val string) error {
+	ss := strings.Split(val, ",")
+	out := make([]int, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = strconv.Atoi(d)
+		if err != nil {
+			return err
+		}
+
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *intSliceValue) Type() string {
+	return "intSlice"
+}
+
+func (s *intSliceValue) String() string {
+	out := make([]string, len(*s.value))
+	for i, d := range *s.value {
+		out[i] = fmt.Sprintf("%d", d)
+	}
+	return "[" + strings.Join(out, ",") + "]"
+}
+
+func intSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Empty string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []int{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]int, len(ss))
+	for i, d := range ss {
+		var err error
+		out[i], err = strconv.Atoi(d)
+		if err != nil {
+			return nil, err
+		}
+
+	}
+	return out, nil
+}
+
+// GetIntSlice return the []int value of a flag with the given name
+func (f *FlagSet) GetIntSlice(name string) ([]int, error) {
+	val, err := f.getFlagType(name, "intSlice", intSliceConv)
+	if err != nil {
+		return []int{}, err
+	}
+	return val.([]int), nil
+}
+
+// IntSliceVar defines a intSlice flag with specified name, default value, and usage string.
+// The argument p points to a []int variable in which to store the value of the flag.
+func (f *FlagSet) IntSliceVar(p *[]int, name string, value []int, usage string) {
+	f.VarP(newIntSliceValue(value, p), name, "", usage)
+}
+
+// IntSliceVarP is like IntSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntSliceVarP(p *[]int, name, shorthand string, value []int, usage string) {
+	f.VarP(newIntSliceValue(value, p), name, shorthand, usage)
+}
+
+// IntSliceVar defines a int[] flag with specified name, default value, and usage string.
+// The argument p points to a int[] variable in which to store the value of the flag.
+func IntSliceVar(p *[]int, name string, value []int, usage string) {
+	CommandLine.VarP(newIntSliceValue(value, p), name, "", usage)
+}
+
+// IntSliceVarP is like IntSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func IntSliceVarP(p *[]int, name, shorthand string, value []int, usage string) {
+	CommandLine.VarP(newIntSliceValue(value, p), name, shorthand, usage)
+}
+
+// IntSlice defines a []int flag with specified name, default value, and usage string.
+// The return value is the address of a []int variable that stores the value of the flag.
+func (f *FlagSet) IntSlice(name string, value []int, usage string) *[]int {
+	p := []int{}
+	f.IntSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// IntSliceP is like IntSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IntSliceP(name, shorthand string, value []int, usage string) *[]int {
+	p := []int{}
+	f.IntSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// IntSlice defines a []int flag with specified name, default value, and usage string.
+// The return value is the address of a []int variable that stores the value of the flag.
+func IntSlice(name string, value []int, usage string) *[]int {
+	return CommandLine.IntSliceP(name, "", value, usage)
+}
+
+// IntSliceP is like IntSlice, but accepts a shorthand letter that can be used after a single dash.
+func IntSliceP(name, shorthand string, value []int, usage string) *[]int {
+	return CommandLine.IntSliceP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/ip.go b/go/vendor/github.com/spf13/pflag/ip.go
new file mode 100644
index 0000000..3d414ba
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/ip.go
@@ -0,0 +1,94 @@
+package pflag
+
+import (
+	"fmt"
+	"net"
+	"strings"
+)
+
+// -- net.IP value
+type ipValue net.IP
+
+func newIPValue(val net.IP, p *net.IP) *ipValue {
+	*p = val
+	return (*ipValue)(p)
+}
+
+func (i *ipValue) String() string { return net.IP(*i).String() }
+func (i *ipValue) Set(s string) error {
+	ip := net.ParseIP(strings.TrimSpace(s))
+	if ip == nil {
+		return fmt.Errorf("failed to parse IP: %q", s)
+	}
+	*i = ipValue(ip)
+	return nil
+}
+
+func (i *ipValue) Type() string {
+	return "ip"
+}
+
+func ipConv(sval string) (interface{}, error) {
+	ip := net.ParseIP(sval)
+	if ip != nil {
+		return ip, nil
+	}
+	return nil, fmt.Errorf("invalid string being converted to IP address: %s", sval)
+}
+
+// GetIP return the net.IP value of a flag with the given name
+func (f *FlagSet) GetIP(name string) (net.IP, error) {
+	val, err := f.getFlagType(name, "ip", ipConv)
+	if err != nil {
+		return nil, err
+	}
+	return val.(net.IP), nil
+}
+
+// IPVar defines an net.IP flag with specified name, default value, and usage string.
+// The argument p points to an net.IP variable in which to store the value of the flag.
+func (f *FlagSet) IPVar(p *net.IP, name string, value net.IP, usage string) {
+	f.VarP(newIPValue(value, p), name, "", usage)
+}
+
+// IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) {
+	f.VarP(newIPValue(value, p), name, shorthand, usage)
+}
+
+// IPVar defines an net.IP flag with specified name, default value, and usage string.
+// The argument p points to an net.IP variable in which to store the value of the flag.
+func IPVar(p *net.IP, name string, value net.IP, usage string) {
+	CommandLine.VarP(newIPValue(value, p), name, "", usage)
+}
+
+// IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash.
+func IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) {
+	CommandLine.VarP(newIPValue(value, p), name, shorthand, usage)
+}
+
+// IP defines an net.IP flag with specified name, default value, and usage string.
+// The return value is the address of an net.IP variable that stores the value of the flag.
+func (f *FlagSet) IP(name string, value net.IP, usage string) *net.IP {
+	p := new(net.IP)
+	f.IPVarP(p, name, "", value, usage)
+	return p
+}
+
+// IPP is like IP, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPP(name, shorthand string, value net.IP, usage string) *net.IP {
+	p := new(net.IP)
+	f.IPVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// IP defines an net.IP flag with specified name, default value, and usage string.
+// The return value is the address of an net.IP variable that stores the value of the flag.
+func IP(name string, value net.IP, usage string) *net.IP {
+	return CommandLine.IPP(name, "", value, usage)
+}
+
+// IPP is like IP, but accepts a shorthand letter that can be used after a single dash.
+func IPP(name, shorthand string, value net.IP, usage string) *net.IP {
+	return CommandLine.IPP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/ip_slice.go b/go/vendor/github.com/spf13/pflag/ip_slice.go
new file mode 100644
index 0000000..7dd196f
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/ip_slice.go
@@ -0,0 +1,148 @@
+package pflag
+
+import (
+	"fmt"
+	"io"
+	"net"
+	"strings"
+)
+
+// -- ipSlice Value
+type ipSliceValue struct {
+	value   *[]net.IP
+	changed bool
+}
+
+func newIPSliceValue(val []net.IP, p *[]net.IP) *ipSliceValue {
+	ipsv := new(ipSliceValue)
+	ipsv.value = p
+	*ipsv.value = val
+	return ipsv
+}
+
+// Set converts, and assigns, the comma-separated IP argument string representation as the []net.IP value of this flag.
+// If Set is called on a flag that already has a []net.IP assigned, the newly converted values will be appended.
+func (s *ipSliceValue) Set(val string) error {
+
+	// remove all quote characters
+	rmQuote := strings.NewReplacer(`"`, "", `'`, "", "`", "")
+
+	// read flag arguments with CSV parser
+	ipStrSlice, err := readAsCSV(rmQuote.Replace(val))
+	if err != nil && err != io.EOF {
+		return err
+	}
+
+	// parse ip values into slice
+	out := make([]net.IP, 0, len(ipStrSlice))
+	for _, ipStr := range ipStrSlice {
+		ip := net.ParseIP(strings.TrimSpace(ipStr))
+		if ip == nil {
+			return fmt.Errorf("invalid string being converted to IP address: %s", ipStr)
+		}
+		out = append(out, ip)
+	}
+
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+
+	s.changed = true
+
+	return nil
+}
+
+// Type returns a string that uniquely represents this flag's type.
+func (s *ipSliceValue) Type() string {
+	return "ipSlice"
+}
+
+// String defines a "native" format for this net.IP slice flag value.
+func (s *ipSliceValue) String() string {
+
+	ipStrSlice := make([]string, len(*s.value))
+	for i, ip := range *s.value {
+		ipStrSlice[i] = ip.String()
+	}
+
+	out, _ := writeAsCSV(ipStrSlice)
+
+	return "[" + out + "]"
+}
+
+func ipSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Emtpy string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []net.IP{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]net.IP, len(ss))
+	for i, sval := range ss {
+		ip := net.ParseIP(strings.TrimSpace(sval))
+		if ip == nil {
+			return nil, fmt.Errorf("invalid string being converted to IP address: %s", sval)
+		}
+		out[i] = ip
+	}
+	return out, nil
+}
+
+// GetIPSlice returns the []net.IP value of a flag with the given name
+func (f *FlagSet) GetIPSlice(name string) ([]net.IP, error) {
+	val, err := f.getFlagType(name, "ipSlice", ipSliceConv)
+	if err != nil {
+		return []net.IP{}, err
+	}
+	return val.([]net.IP), nil
+}
+
+// IPSliceVar defines a ipSlice flag with specified name, default value, and usage string.
+// The argument p points to a []net.IP variable in which to store the value of the flag.
+func (f *FlagSet) IPSliceVar(p *[]net.IP, name string, value []net.IP, usage string) {
+	f.VarP(newIPSliceValue(value, p), name, "", usage)
+}
+
+// IPSliceVarP is like IPSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPSliceVarP(p *[]net.IP, name, shorthand string, value []net.IP, usage string) {
+	f.VarP(newIPSliceValue(value, p), name, shorthand, usage)
+}
+
+// IPSliceVar defines a []net.IP flag with specified name, default value, and usage string.
+// The argument p points to a []net.IP variable in which to store the value of the flag.
+func IPSliceVar(p *[]net.IP, name string, value []net.IP, usage string) {
+	CommandLine.VarP(newIPSliceValue(value, p), name, "", usage)
+}
+
+// IPSliceVarP is like IPSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func IPSliceVarP(p *[]net.IP, name, shorthand string, value []net.IP, usage string) {
+	CommandLine.VarP(newIPSliceValue(value, p), name, shorthand, usage)
+}
+
+// IPSlice defines a []net.IP flag with specified name, default value, and usage string.
+// The return value is the address of a []net.IP variable that stores the value of that flag.
+func (f *FlagSet) IPSlice(name string, value []net.IP, usage string) *[]net.IP {
+	p := []net.IP{}
+	f.IPSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// IPSliceP is like IPSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPSliceP(name, shorthand string, value []net.IP, usage string) *[]net.IP {
+	p := []net.IP{}
+	f.IPSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// IPSlice defines a []net.IP flag with specified name, default value, and usage string.
+// The return value is the address of a []net.IP variable that stores the value of the flag.
+func IPSlice(name string, value []net.IP, usage string) *[]net.IP {
+	return CommandLine.IPSliceP(name, "", value, usage)
+}
+
+// IPSliceP is like IPSlice, but accepts a shorthand letter that can be used after a single dash.
+func IPSliceP(name, shorthand string, value []net.IP, usage string) *[]net.IP {
+	return CommandLine.IPSliceP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/ipmask.go b/go/vendor/github.com/spf13/pflag/ipmask.go
new file mode 100644
index 0000000..5bd44bd
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/ipmask.go
@@ -0,0 +1,122 @@
+package pflag
+
+import (
+	"fmt"
+	"net"
+	"strconv"
+)
+
+// -- net.IPMask value
+type ipMaskValue net.IPMask
+
+func newIPMaskValue(val net.IPMask, p *net.IPMask) *ipMaskValue {
+	*p = val
+	return (*ipMaskValue)(p)
+}
+
+func (i *ipMaskValue) String() string { return net.IPMask(*i).String() }
+func (i *ipMaskValue) Set(s string) error {
+	ip := ParseIPv4Mask(s)
+	if ip == nil {
+		return fmt.Errorf("failed to parse IP mask: %q", s)
+	}
+	*i = ipMaskValue(ip)
+	return nil
+}
+
+func (i *ipMaskValue) Type() string {
+	return "ipMask"
+}
+
+// ParseIPv4Mask written in IP form (e.g. 255.255.255.0).
+// This function should really belong to the net package.
+func ParseIPv4Mask(s string) net.IPMask {
+	mask := net.ParseIP(s)
+	if mask == nil {
+		if len(s) != 8 {
+			return nil
+		}
+		// net.IPMask.String() actually outputs things like ffffff00
+		// so write a horrible parser for that as well  :-(
+		m := []int{}
+		for i := 0; i < 4; i++ {
+			b := "0x" + s[2*i:2*i+2]
+			d, err := strconv.ParseInt(b, 0, 0)
+			if err != nil {
+				return nil
+			}
+			m = append(m, int(d))
+		}
+		s := fmt.Sprintf("%d.%d.%d.%d", m[0], m[1], m[2], m[3])
+		mask = net.ParseIP(s)
+		if mask == nil {
+			return nil
+		}
+	}
+	return net.IPv4Mask(mask[12], mask[13], mask[14], mask[15])
+}
+
+func parseIPv4Mask(sval string) (interface{}, error) {
+	mask := ParseIPv4Mask(sval)
+	if mask == nil {
+		return nil, fmt.Errorf("unable to parse %s as net.IPMask", sval)
+	}
+	return mask, nil
+}
+
+// GetIPv4Mask return the net.IPv4Mask value of a flag with the given name
+func (f *FlagSet) GetIPv4Mask(name string) (net.IPMask, error) {
+	val, err := f.getFlagType(name, "ipMask", parseIPv4Mask)
+	if err != nil {
+		return nil, err
+	}
+	return val.(net.IPMask), nil
+}
+
+// IPMaskVar defines an net.IPMask flag with specified name, default value, and usage string.
+// The argument p points to an net.IPMask variable in which to store the value of the flag.
+func (f *FlagSet) IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {
+	f.VarP(newIPMaskValue(value, p), name, "", usage)
+}
+
+// IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {
+	f.VarP(newIPMaskValue(value, p), name, shorthand, usage)
+}
+
+// IPMaskVar defines an net.IPMask flag with specified name, default value, and usage string.
+// The argument p points to an net.IPMask variable in which to store the value of the flag.
+func IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {
+	CommandLine.VarP(newIPMaskValue(value, p), name, "", usage)
+}
+
+// IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
+func IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {
+	CommandLine.VarP(newIPMaskValue(value, p), name, shorthand, usage)
+}
+
+// IPMask defines an net.IPMask flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPMask variable that stores the value of the flag.
+func (f *FlagSet) IPMask(name string, value net.IPMask, usage string) *net.IPMask {
+	p := new(net.IPMask)
+	f.IPMaskVarP(p, name, "", value, usage)
+	return p
+}
+
+// IPMaskP is like IPMask, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {
+	p := new(net.IPMask)
+	f.IPMaskVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// IPMask defines an net.IPMask flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPMask variable that stores the value of the flag.
+func IPMask(name string, value net.IPMask, usage string) *net.IPMask {
+	return CommandLine.IPMaskP(name, "", value, usage)
+}
+
+// IPMaskP is like IP, but accepts a shorthand letter that can be used after a single dash.
+func IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {
+	return CommandLine.IPMaskP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/ipnet.go b/go/vendor/github.com/spf13/pflag/ipnet.go
new file mode 100644
index 0000000..e2c1b8b
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/ipnet.go
@@ -0,0 +1,98 @@
+package pflag
+
+import (
+	"fmt"
+	"net"
+	"strings"
+)
+
+// IPNet adapts net.IPNet for use as a flag.
+type ipNetValue net.IPNet
+
+func (ipnet ipNetValue) String() string {
+	n := net.IPNet(ipnet)
+	return n.String()
+}
+
+func (ipnet *ipNetValue) Set(value string) error {
+	_, n, err := net.ParseCIDR(strings.TrimSpace(value))
+	if err != nil {
+		return err
+	}
+	*ipnet = ipNetValue(*n)
+	return nil
+}
+
+func (*ipNetValue) Type() string {
+	return "ipNet"
+}
+
+func newIPNetValue(val net.IPNet, p *net.IPNet) *ipNetValue {
+	*p = val
+	return (*ipNetValue)(p)
+}
+
+func ipNetConv(sval string) (interface{}, error) {
+	_, n, err := net.ParseCIDR(strings.TrimSpace(sval))
+	if err == nil {
+		return *n, nil
+	}
+	return nil, fmt.Errorf("invalid string being converted to IPNet: %s", sval)
+}
+
+// GetIPNet return the net.IPNet value of a flag with the given name
+func (f *FlagSet) GetIPNet(name string) (net.IPNet, error) {
+	val, err := f.getFlagType(name, "ipNet", ipNetConv)
+	if err != nil {
+		return net.IPNet{}, err
+	}
+	return val.(net.IPNet), nil
+}
+
+// IPNetVar defines an net.IPNet flag with specified name, default value, and usage string.
+// The argument p points to an net.IPNet variable in which to store the value of the flag.
+func (f *FlagSet) IPNetVar(p *net.IPNet, name string, value net.IPNet, usage string) {
+	f.VarP(newIPNetValue(value, p), name, "", usage)
+}
+
+// IPNetVarP is like IPNetVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPNetVarP(p *net.IPNet, name, shorthand string, value net.IPNet, usage string) {
+	f.VarP(newIPNetValue(value, p), name, shorthand, usage)
+}
+
+// IPNetVar defines an net.IPNet flag with specified name, default value, and usage string.
+// The argument p points to an net.IPNet variable in which to store the value of the flag.
+func IPNetVar(p *net.IPNet, name string, value net.IPNet, usage string) {
+	CommandLine.VarP(newIPNetValue(value, p), name, "", usage)
+}
+
+// IPNetVarP is like IPNetVar, but accepts a shorthand letter that can be used after a single dash.
+func IPNetVarP(p *net.IPNet, name, shorthand string, value net.IPNet, usage string) {
+	CommandLine.VarP(newIPNetValue(value, p), name, shorthand, usage)
+}
+
+// IPNet defines an net.IPNet flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPNet variable that stores the value of the flag.
+func (f *FlagSet) IPNet(name string, value net.IPNet, usage string) *net.IPNet {
+	p := new(net.IPNet)
+	f.IPNetVarP(p, name, "", value, usage)
+	return p
+}
+
+// IPNetP is like IPNet, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) IPNetP(name, shorthand string, value net.IPNet, usage string) *net.IPNet {
+	p := new(net.IPNet)
+	f.IPNetVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// IPNet defines an net.IPNet flag with specified name, default value, and usage string.
+// The return value is the address of an net.IPNet variable that stores the value of the flag.
+func IPNet(name string, value net.IPNet, usage string) *net.IPNet {
+	return CommandLine.IPNetP(name, "", value, usage)
+}
+
+// IPNetP is like IPNet, but accepts a shorthand letter that can be used after a single dash.
+func IPNetP(name, shorthand string, value net.IPNet, usage string) *net.IPNet {
+	return CommandLine.IPNetP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/string.go b/go/vendor/github.com/spf13/pflag/string.go
new file mode 100644
index 0000000..04e0a26
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/string.go
@@ -0,0 +1,80 @@
+package pflag
+
+// -- string Value
+type stringValue string
+
+func newStringValue(val string, p *string) *stringValue {
+	*p = val
+	return (*stringValue)(p)
+}
+
+func (s *stringValue) Set(val string) error {
+	*s = stringValue(val)
+	return nil
+}
+func (s *stringValue) Type() string {
+	return "string"
+}
+
+func (s *stringValue) String() string { return string(*s) }
+
+func stringConv(sval string) (interface{}, error) {
+	return sval, nil
+}
+
+// GetString return the string value of a flag with the given name
+func (f *FlagSet) GetString(name string) (string, error) {
+	val, err := f.getFlagType(name, "string", stringConv)
+	if err != nil {
+		return "", err
+	}
+	return val.(string), nil
+}
+
+// StringVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a string variable in which to store the value of the flag.
+func (f *FlagSet) StringVar(p *string, name string, value string, usage string) {
+	f.VarP(newStringValue(value, p), name, "", usage)
+}
+
+// StringVarP is like StringVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringVarP(p *string, name, shorthand string, value string, usage string) {
+	f.VarP(newStringValue(value, p), name, shorthand, usage)
+}
+
+// StringVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a string variable in which to store the value of the flag.
+func StringVar(p *string, name string, value string, usage string) {
+	CommandLine.VarP(newStringValue(value, p), name, "", usage)
+}
+
+// StringVarP is like StringVar, but accepts a shorthand letter that can be used after a single dash.
+func StringVarP(p *string, name, shorthand string, value string, usage string) {
+	CommandLine.VarP(newStringValue(value, p), name, shorthand, usage)
+}
+
+// String defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a string variable that stores the value of the flag.
+func (f *FlagSet) String(name string, value string, usage string) *string {
+	p := new(string)
+	f.StringVarP(p, name, "", value, usage)
+	return p
+}
+
+// StringP is like String, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringP(name, shorthand string, value string, usage string) *string {
+	p := new(string)
+	f.StringVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// String defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a string variable that stores the value of the flag.
+func String(name string, value string, usage string) *string {
+	return CommandLine.StringP(name, "", value, usage)
+}
+
+// StringP is like String, but accepts a shorthand letter that can be used after a single dash.
+func StringP(name, shorthand string, value string, usage string) *string {
+	return CommandLine.StringP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/string_array.go b/go/vendor/github.com/spf13/pflag/string_array.go
new file mode 100644
index 0000000..fa7bc60
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/string_array.go
@@ -0,0 +1,103 @@
+package pflag
+
+// -- stringArray Value
+type stringArrayValue struct {
+	value   *[]string
+	changed bool
+}
+
+func newStringArrayValue(val []string, p *[]string) *stringArrayValue {
+	ssv := new(stringArrayValue)
+	ssv.value = p
+	*ssv.value = val
+	return ssv
+}
+
+func (s *stringArrayValue) Set(val string) error {
+	if !s.changed {
+		*s.value = []string{val}
+		s.changed = true
+	} else {
+		*s.value = append(*s.value, val)
+	}
+	return nil
+}
+
+func (s *stringArrayValue) Type() string {
+	return "stringArray"
+}
+
+func (s *stringArrayValue) String() string {
+	str, _ := writeAsCSV(*s.value)
+	return "[" + str + "]"
+}
+
+func stringArrayConv(sval string) (interface{}, error) {
+	sval = sval[1 : len(sval)-1]
+	// An empty string would cause a array with one (empty) string
+	if len(sval) == 0 {
+		return []string{}, nil
+	}
+	return readAsCSV(sval)
+}
+
+// GetStringArray return the []string value of a flag with the given name
+func (f *FlagSet) GetStringArray(name string) ([]string, error) {
+	val, err := f.getFlagType(name, "stringArray", stringArrayConv)
+	if err != nil {
+		return []string{}, err
+	}
+	return val.([]string), nil
+}
+
+// StringArrayVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a []string variable in which to store the values of the multiple flags.
+// The value of each argument will not try to be separated by comma. Use a StringSlice for that.
+func (f *FlagSet) StringArrayVar(p *[]string, name string, value []string, usage string) {
+	f.VarP(newStringArrayValue(value, p), name, "", usage)
+}
+
+// StringArrayVarP is like StringArrayVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringArrayVarP(p *[]string, name, shorthand string, value []string, usage string) {
+	f.VarP(newStringArrayValue(value, p), name, shorthand, usage)
+}
+
+// StringArrayVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a []string variable in which to store the value of the flag.
+// The value of each argument will not try to be separated by comma. Use a StringSlice for that.
+func StringArrayVar(p *[]string, name string, value []string, usage string) {
+	CommandLine.VarP(newStringArrayValue(value, p), name, "", usage)
+}
+
+// StringArrayVarP is like StringArrayVar, but accepts a shorthand letter that can be used after a single dash.
+func StringArrayVarP(p *[]string, name, shorthand string, value []string, usage string) {
+	CommandLine.VarP(newStringArrayValue(value, p), name, shorthand, usage)
+}
+
+// StringArray defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a []string variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma. Use a StringSlice for that.
+func (f *FlagSet) StringArray(name string, value []string, usage string) *[]string {
+	p := []string{}
+	f.StringArrayVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// StringArrayP is like StringArray, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringArrayP(name, shorthand string, value []string, usage string) *[]string {
+	p := []string{}
+	f.StringArrayVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// StringArray defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a []string variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma. Use a StringSlice for that.
+func StringArray(name string, value []string, usage string) *[]string {
+	return CommandLine.StringArrayP(name, "", value, usage)
+}
+
+// StringArrayP is like StringArray, but accepts a shorthand letter that can be used after a single dash.
+func StringArrayP(name, shorthand string, value []string, usage string) *[]string {
+	return CommandLine.StringArrayP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/string_slice.go b/go/vendor/github.com/spf13/pflag/string_slice.go
new file mode 100644
index 0000000..0cd3ccc
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/string_slice.go
@@ -0,0 +1,149 @@
+package pflag
+
+import (
+	"bytes"
+	"encoding/csv"
+	"strings"
+)
+
+// -- stringSlice Value
+type stringSliceValue struct {
+	value   *[]string
+	changed bool
+}
+
+func newStringSliceValue(val []string, p *[]string) *stringSliceValue {
+	ssv := new(stringSliceValue)
+	ssv.value = p
+	*ssv.value = val
+	return ssv
+}
+
+func readAsCSV(val string) ([]string, error) {
+	if val == "" {
+		return []string{}, nil
+	}
+	stringReader := strings.NewReader(val)
+	csvReader := csv.NewReader(stringReader)
+	return csvReader.Read()
+}
+
+func writeAsCSV(vals []string) (string, error) {
+	b := &bytes.Buffer{}
+	w := csv.NewWriter(b)
+	err := w.Write(vals)
+	if err != nil {
+		return "", err
+	}
+	w.Flush()
+	return strings.TrimSuffix(b.String(), "\n"), nil
+}
+
+func (s *stringSliceValue) Set(val string) error {
+	v, err := readAsCSV(val)
+	if err != nil {
+		return err
+	}
+	if !s.changed {
+		*s.value = v
+	} else {
+		*s.value = append(*s.value, v...)
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *stringSliceValue) Type() string {
+	return "stringSlice"
+}
+
+func (s *stringSliceValue) String() string {
+	str, _ := writeAsCSV(*s.value)
+	return "[" + str + "]"
+}
+
+func stringSliceConv(sval string) (interface{}, error) {
+	sval = sval[1 : len(sval)-1]
+	// An empty string would cause a slice with one (empty) string
+	if len(sval) == 0 {
+		return []string{}, nil
+	}
+	return readAsCSV(sval)
+}
+
+// GetStringSlice return the []string value of a flag with the given name
+func (f *FlagSet) GetStringSlice(name string) ([]string, error) {
+	val, err := f.getFlagType(name, "stringSlice", stringSliceConv)
+	if err != nil {
+		return []string{}, err
+	}
+	return val.([]string), nil
+}
+
+// StringSliceVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a []string variable in which to store the value of the flag.
+// Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
+// For example:
+//   --ss="v1,v2" -ss="v3"
+// will result in
+//   []string{"v1", "v2", "v3"}
+func (f *FlagSet) StringSliceVar(p *[]string, name string, value []string, usage string) {
+	f.VarP(newStringSliceValue(value, p), name, "", usage)
+}
+
+// StringSliceVarP is like StringSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringSliceVarP(p *[]string, name, shorthand string, value []string, usage string) {
+	f.VarP(newStringSliceValue(value, p), name, shorthand, usage)
+}
+
+// StringSliceVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a []string variable in which to store the value of the flag.
+// Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
+// For example:
+//   --ss="v1,v2" -ss="v3"
+// will result in
+//   []string{"v1", "v2", "v3"}
+func StringSliceVar(p *[]string, name string, value []string, usage string) {
+	CommandLine.VarP(newStringSliceValue(value, p), name, "", usage)
+}
+
+// StringSliceVarP is like StringSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func StringSliceVarP(p *[]string, name, shorthand string, value []string, usage string) {
+	CommandLine.VarP(newStringSliceValue(value, p), name, shorthand, usage)
+}
+
+// StringSlice defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a []string variable that stores the value of the flag.
+// Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
+// For example:
+//   --ss="v1,v2" -ss="v3"
+// will result in
+//   []string{"v1", "v2", "v3"}
+func (f *FlagSet) StringSlice(name string, value []string, usage string) *[]string {
+	p := []string{}
+	f.StringSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// StringSliceP is like StringSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringSliceP(name, shorthand string, value []string, usage string) *[]string {
+	p := []string{}
+	f.StringSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// StringSlice defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a []string variable that stores the value of the flag.
+// Compared to StringArray flags, StringSlice flags take comma-separated value as arguments and split them accordingly.
+// For example:
+//   --ss="v1,v2" -ss="v3"
+// will result in
+//   []string{"v1", "v2", "v3"}
+func StringSlice(name string, value []string, usage string) *[]string {
+	return CommandLine.StringSliceP(name, "", value, usage)
+}
+
+// StringSliceP is like StringSlice, but accepts a shorthand letter that can be used after a single dash.
+func StringSliceP(name, shorthand string, value []string, usage string) *[]string {
+	return CommandLine.StringSliceP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/string_to_int.go b/go/vendor/github.com/spf13/pflag/string_to_int.go
new file mode 100644
index 0000000..5ceda39
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/string_to_int.go
@@ -0,0 +1,149 @@
+package pflag
+
+import (
+	"bytes"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// -- stringToInt Value
+type stringToIntValue struct {
+	value   *map[string]int
+	changed bool
+}
+
+func newStringToIntValue(val map[string]int, p *map[string]int) *stringToIntValue {
+	ssv := new(stringToIntValue)
+	ssv.value = p
+	*ssv.value = val
+	return ssv
+}
+
+// Format: a=1,b=2
+func (s *stringToIntValue) Set(val string) error {
+	ss := strings.Split(val, ",")
+	out := make(map[string]int, len(ss))
+	for _, pair := range ss {
+		kv := strings.SplitN(pair, "=", 2)
+		if len(kv) != 2 {
+			return fmt.Errorf("%s must be formatted as key=value", pair)
+		}
+		var err error
+		out[kv[0]], err = strconv.Atoi(kv[1])
+		if err != nil {
+			return err
+		}
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		for k, v := range out {
+			(*s.value)[k] = v
+		}
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *stringToIntValue) Type() string {
+	return "stringToInt"
+}
+
+func (s *stringToIntValue) String() string {
+	var buf bytes.Buffer
+	i := 0
+	for k, v := range *s.value {
+		if i > 0 {
+			buf.WriteRune(',')
+		}
+		buf.WriteString(k)
+		buf.WriteRune('=')
+		buf.WriteString(strconv.Itoa(v))
+		i++
+	}
+	return "[" + buf.String() + "]"
+}
+
+func stringToIntConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// An empty string would cause an empty map
+	if len(val) == 0 {
+		return map[string]int{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make(map[string]int, len(ss))
+	for _, pair := range ss {
+		kv := strings.SplitN(pair, "=", 2)
+		if len(kv) != 2 {
+			return nil, fmt.Errorf("%s must be formatted as key=value", pair)
+		}
+		var err error
+		out[kv[0]], err = strconv.Atoi(kv[1])
+		if err != nil {
+			return nil, err
+		}
+	}
+	return out, nil
+}
+
+// GetStringToInt return the map[string]int value of a flag with the given name
+func (f *FlagSet) GetStringToInt(name string) (map[string]int, error) {
+	val, err := f.getFlagType(name, "stringToInt", stringToIntConv)
+	if err != nil {
+		return map[string]int{}, err
+	}
+	return val.(map[string]int), nil
+}
+
+// StringToIntVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a map[string]int variable in which to store the values of the multiple flags.
+// The value of each argument will not try to be separated by comma
+func (f *FlagSet) StringToIntVar(p *map[string]int, name string, value map[string]int, usage string) {
+	f.VarP(newStringToIntValue(value, p), name, "", usage)
+}
+
+// StringToIntVarP is like StringToIntVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringToIntVarP(p *map[string]int, name, shorthand string, value map[string]int, usage string) {
+	f.VarP(newStringToIntValue(value, p), name, shorthand, usage)
+}
+
+// StringToIntVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a map[string]int variable in which to store the value of the flag.
+// The value of each argument will not try to be separated by comma
+func StringToIntVar(p *map[string]int, name string, value map[string]int, usage string) {
+	CommandLine.VarP(newStringToIntValue(value, p), name, "", usage)
+}
+
+// StringToIntVarP is like StringToIntVar, but accepts a shorthand letter that can be used after a single dash.
+func StringToIntVarP(p *map[string]int, name, shorthand string, value map[string]int, usage string) {
+	CommandLine.VarP(newStringToIntValue(value, p), name, shorthand, usage)
+}
+
+// StringToInt defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a map[string]int variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma
+func (f *FlagSet) StringToInt(name string, value map[string]int, usage string) *map[string]int {
+	p := map[string]int{}
+	f.StringToIntVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// StringToIntP is like StringToInt, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringToIntP(name, shorthand string, value map[string]int, usage string) *map[string]int {
+	p := map[string]int{}
+	f.StringToIntVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// StringToInt defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a map[string]int variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma
+func StringToInt(name string, value map[string]int, usage string) *map[string]int {
+	return CommandLine.StringToIntP(name, "", value, usage)
+}
+
+// StringToIntP is like StringToInt, but accepts a shorthand letter that can be used after a single dash.
+func StringToIntP(name, shorthand string, value map[string]int, usage string) *map[string]int {
+	return CommandLine.StringToIntP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/string_to_string.go b/go/vendor/github.com/spf13/pflag/string_to_string.go
new file mode 100644
index 0000000..890a01a
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/string_to_string.go
@@ -0,0 +1,160 @@
+package pflag
+
+import (
+	"bytes"
+	"encoding/csv"
+	"fmt"
+	"strings"
+)
+
+// -- stringToString Value
+type stringToStringValue struct {
+	value   *map[string]string
+	changed bool
+}
+
+func newStringToStringValue(val map[string]string, p *map[string]string) *stringToStringValue {
+	ssv := new(stringToStringValue)
+	ssv.value = p
+	*ssv.value = val
+	return ssv
+}
+
+// Format: a=1,b=2
+func (s *stringToStringValue) Set(val string) error {
+	var ss []string
+	n := strings.Count(val, "=")
+	switch n {
+	case 0:
+		return fmt.Errorf("%s must be formatted as key=value", val)
+	case 1:
+		ss = append(ss, strings.Trim(val, `"`))
+	default:
+		r := csv.NewReader(strings.NewReader(val))
+		var err error
+		ss, err = r.Read()
+		if err != nil {
+			return err
+		}
+	}
+
+	out := make(map[string]string, len(ss))
+	for _, pair := range ss {
+		kv := strings.SplitN(pair, "=", 2)
+		if len(kv) != 2 {
+			return fmt.Errorf("%s must be formatted as key=value", pair)
+		}
+		out[kv[0]] = kv[1]
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		for k, v := range out {
+			(*s.value)[k] = v
+		}
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *stringToStringValue) Type() string {
+	return "stringToString"
+}
+
+func (s *stringToStringValue) String() string {
+	records := make([]string, 0, len(*s.value)>>1)
+	for k, v := range *s.value {
+		records = append(records, k+"="+v)
+	}
+
+	var buf bytes.Buffer
+	w := csv.NewWriter(&buf)
+	if err := w.Write(records); err != nil {
+		panic(err)
+	}
+	w.Flush()
+	return "[" + strings.TrimSpace(buf.String()) + "]"
+}
+
+func stringToStringConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// An empty string would cause an empty map
+	if len(val) == 0 {
+		return map[string]string{}, nil
+	}
+	r := csv.NewReader(strings.NewReader(val))
+	ss, err := r.Read()
+	if err != nil {
+		return nil, err
+	}
+	out := make(map[string]string, len(ss))
+	for _, pair := range ss {
+		kv := strings.SplitN(pair, "=", 2)
+		if len(kv) != 2 {
+			return nil, fmt.Errorf("%s must be formatted as key=value", pair)
+		}
+		out[kv[0]] = kv[1]
+	}
+	return out, nil
+}
+
+// GetStringToString return the map[string]string value of a flag with the given name
+func (f *FlagSet) GetStringToString(name string) (map[string]string, error) {
+	val, err := f.getFlagType(name, "stringToString", stringToStringConv)
+	if err != nil {
+		return map[string]string{}, err
+	}
+	return val.(map[string]string), nil
+}
+
+// StringToStringVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a map[string]string variable in which to store the values of the multiple flags.
+// The value of each argument will not try to be separated by comma
+func (f *FlagSet) StringToStringVar(p *map[string]string, name string, value map[string]string, usage string) {
+	f.VarP(newStringToStringValue(value, p), name, "", usage)
+}
+
+// StringToStringVarP is like StringToStringVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringToStringVarP(p *map[string]string, name, shorthand string, value map[string]string, usage string) {
+	f.VarP(newStringToStringValue(value, p), name, shorthand, usage)
+}
+
+// StringToStringVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a map[string]string variable in which to store the value of the flag.
+// The value of each argument will not try to be separated by comma
+func StringToStringVar(p *map[string]string, name string, value map[string]string, usage string) {
+	CommandLine.VarP(newStringToStringValue(value, p), name, "", usage)
+}
+
+// StringToStringVarP is like StringToStringVar, but accepts a shorthand letter that can be used after a single dash.
+func StringToStringVarP(p *map[string]string, name, shorthand string, value map[string]string, usage string) {
+	CommandLine.VarP(newStringToStringValue(value, p), name, shorthand, usage)
+}
+
+// StringToString defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a map[string]string variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma
+func (f *FlagSet) StringToString(name string, value map[string]string, usage string) *map[string]string {
+	p := map[string]string{}
+	f.StringToStringVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// StringToStringP is like StringToString, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringToStringP(name, shorthand string, value map[string]string, usage string) *map[string]string {
+	p := map[string]string{}
+	f.StringToStringVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// StringToString defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a map[string]string variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma
+func StringToString(name string, value map[string]string, usage string) *map[string]string {
+	return CommandLine.StringToStringP(name, "", value, usage)
+}
+
+// StringToStringP is like StringToString, but accepts a shorthand letter that can be used after a single dash.
+func StringToStringP(name, shorthand string, value map[string]string, usage string) *map[string]string {
+	return CommandLine.StringToStringP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/uint.go b/go/vendor/github.com/spf13/pflag/uint.go
new file mode 100644
index 0000000..dcbc2b7
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/uint.go
@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- uint Value
+type uintValue uint
+
+func newUintValue(val uint, p *uint) *uintValue {
+	*p = val
+	return (*uintValue)(p)
+}
+
+func (i *uintValue) Set(s string) error {
+	v, err := strconv.ParseUint(s, 0, 64)
+	*i = uintValue(v)
+	return err
+}
+
+func (i *uintValue) Type() string {
+	return "uint"
+}
+
+func (i *uintValue) String() string { return strconv.FormatUint(uint64(*i), 10) }
+
+func uintConv(sval string) (interface{}, error) {
+	v, err := strconv.ParseUint(sval, 0, 0)
+	if err != nil {
+		return 0, err
+	}
+	return uint(v), nil
+}
+
+// GetUint return the uint value of a flag with the given name
+func (f *FlagSet) GetUint(name string) (uint, error) {
+	val, err := f.getFlagType(name, "uint", uintConv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(uint), nil
+}
+
+// UintVar defines a uint flag with specified name, default value, and usage string.
+// The argument p points to a uint variable in which to store the value of the flag.
+func (f *FlagSet) UintVar(p *uint, name string, value uint, usage string) {
+	f.VarP(newUintValue(value, p), name, "", usage)
+}
+
+// UintVarP is like UintVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) UintVarP(p *uint, name, shorthand string, value uint, usage string) {
+	f.VarP(newUintValue(value, p), name, shorthand, usage)
+}
+
+// UintVar defines a uint flag with specified name, default value, and usage string.
+// The argument p points to a uint  variable in which to store the value of the flag.
+func UintVar(p *uint, name string, value uint, usage string) {
+	CommandLine.VarP(newUintValue(value, p), name, "", usage)
+}
+
+// UintVarP is like UintVar, but accepts a shorthand letter that can be used after a single dash.
+func UintVarP(p *uint, name, shorthand string, value uint, usage string) {
+	CommandLine.VarP(newUintValue(value, p), name, shorthand, usage)
+}
+
+// Uint defines a uint flag with specified name, default value, and usage string.
+// The return value is the address of a uint  variable that stores the value of the flag.
+func (f *FlagSet) Uint(name string, value uint, usage string) *uint {
+	p := new(uint)
+	f.UintVarP(p, name, "", value, usage)
+	return p
+}
+
+// UintP is like Uint, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) UintP(name, shorthand string, value uint, usage string) *uint {
+	p := new(uint)
+	f.UintVarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Uint defines a uint flag with specified name, default value, and usage string.
+// The return value is the address of a uint  variable that stores the value of the flag.
+func Uint(name string, value uint, usage string) *uint {
+	return CommandLine.UintP(name, "", value, usage)
+}
+
+// UintP is like Uint, but accepts a shorthand letter that can be used after a single dash.
+func UintP(name, shorthand string, value uint, usage string) *uint {
+	return CommandLine.UintP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/uint16.go b/go/vendor/github.com/spf13/pflag/uint16.go
new file mode 100644
index 0000000..7e9914e
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/uint16.go
@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- uint16 value
+type uint16Value uint16
+
+func newUint16Value(val uint16, p *uint16) *uint16Value {
+	*p = val
+	return (*uint16Value)(p)
+}
+
+func (i *uint16Value) Set(s string) error {
+	v, err := strconv.ParseUint(s, 0, 16)
+	*i = uint16Value(v)
+	return err
+}
+
+func (i *uint16Value) Type() string {
+	return "uint16"
+}
+
+func (i *uint16Value) String() string { return strconv.FormatUint(uint64(*i), 10) }
+
+func uint16Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseUint(sval, 0, 16)
+	if err != nil {
+		return 0, err
+	}
+	return uint16(v), nil
+}
+
+// GetUint16 return the uint16 value of a flag with the given name
+func (f *FlagSet) GetUint16(name string) (uint16, error) {
+	val, err := f.getFlagType(name, "uint16", uint16Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(uint16), nil
+}
+
+// Uint16Var defines a uint flag with specified name, default value, and usage string.
+// The argument p points to a uint variable in which to store the value of the flag.
+func (f *FlagSet) Uint16Var(p *uint16, name string, value uint16, usage string) {
+	f.VarP(newUint16Value(value, p), name, "", usage)
+}
+
+// Uint16VarP is like Uint16Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint16VarP(p *uint16, name, shorthand string, value uint16, usage string) {
+	f.VarP(newUint16Value(value, p), name, shorthand, usage)
+}
+
+// Uint16Var defines a uint flag with specified name, default value, and usage string.
+// The argument p points to a uint  variable in which to store the value of the flag.
+func Uint16Var(p *uint16, name string, value uint16, usage string) {
+	CommandLine.VarP(newUint16Value(value, p), name, "", usage)
+}
+
+// Uint16VarP is like Uint16Var, but accepts a shorthand letter that can be used after a single dash.
+func Uint16VarP(p *uint16, name, shorthand string, value uint16, usage string) {
+	CommandLine.VarP(newUint16Value(value, p), name, shorthand, usage)
+}
+
+// Uint16 defines a uint flag with specified name, default value, and usage string.
+// The return value is the address of a uint  variable that stores the value of the flag.
+func (f *FlagSet) Uint16(name string, value uint16, usage string) *uint16 {
+	p := new(uint16)
+	f.Uint16VarP(p, name, "", value, usage)
+	return p
+}
+
+// Uint16P is like Uint16, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint16P(name, shorthand string, value uint16, usage string) *uint16 {
+	p := new(uint16)
+	f.Uint16VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Uint16 defines a uint flag with specified name, default value, and usage string.
+// The return value is the address of a uint  variable that stores the value of the flag.
+func Uint16(name string, value uint16, usage string) *uint16 {
+	return CommandLine.Uint16P(name, "", value, usage)
+}
+
+// Uint16P is like Uint16, but accepts a shorthand letter that can be used after a single dash.
+func Uint16P(name, shorthand string, value uint16, usage string) *uint16 {
+	return CommandLine.Uint16P(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/uint32.go b/go/vendor/github.com/spf13/pflag/uint32.go
new file mode 100644
index 0000000..d802453
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/uint32.go
@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- uint32 value
+type uint32Value uint32
+
+func newUint32Value(val uint32, p *uint32) *uint32Value {
+	*p = val
+	return (*uint32Value)(p)
+}
+
+func (i *uint32Value) Set(s string) error {
+	v, err := strconv.ParseUint(s, 0, 32)
+	*i = uint32Value(v)
+	return err
+}
+
+func (i *uint32Value) Type() string {
+	return "uint32"
+}
+
+func (i *uint32Value) String() string { return strconv.FormatUint(uint64(*i), 10) }
+
+func uint32Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseUint(sval, 0, 32)
+	if err != nil {
+		return 0, err
+	}
+	return uint32(v), nil
+}
+
+// GetUint32 return the uint32 value of a flag with the given name
+func (f *FlagSet) GetUint32(name string) (uint32, error) {
+	val, err := f.getFlagType(name, "uint32", uint32Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(uint32), nil
+}
+
+// Uint32Var defines a uint32 flag with specified name, default value, and usage string.
+// The argument p points to a uint32 variable in which to store the value of the flag.
+func (f *FlagSet) Uint32Var(p *uint32, name string, value uint32, usage string) {
+	f.VarP(newUint32Value(value, p), name, "", usage)
+}
+
+// Uint32VarP is like Uint32Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint32VarP(p *uint32, name, shorthand string, value uint32, usage string) {
+	f.VarP(newUint32Value(value, p), name, shorthand, usage)
+}
+
+// Uint32Var defines a uint32 flag with specified name, default value, and usage string.
+// The argument p points to a uint32  variable in which to store the value of the flag.
+func Uint32Var(p *uint32, name string, value uint32, usage string) {
+	CommandLine.VarP(newUint32Value(value, p), name, "", usage)
+}
+
+// Uint32VarP is like Uint32Var, but accepts a shorthand letter that can be used after a single dash.
+func Uint32VarP(p *uint32, name, shorthand string, value uint32, usage string) {
+	CommandLine.VarP(newUint32Value(value, p), name, shorthand, usage)
+}
+
+// Uint32 defines a uint32 flag with specified name, default value, and usage string.
+// The return value is the address of a uint32  variable that stores the value of the flag.
+func (f *FlagSet) Uint32(name string, value uint32, usage string) *uint32 {
+	p := new(uint32)
+	f.Uint32VarP(p, name, "", value, usage)
+	return p
+}
+
+// Uint32P is like Uint32, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint32P(name, shorthand string, value uint32, usage string) *uint32 {
+	p := new(uint32)
+	f.Uint32VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Uint32 defines a uint32 flag with specified name, default value, and usage string.
+// The return value is the address of a uint32  variable that stores the value of the flag.
+func Uint32(name string, value uint32, usage string) *uint32 {
+	return CommandLine.Uint32P(name, "", value, usage)
+}
+
+// Uint32P is like Uint32, but accepts a shorthand letter that can be used after a single dash.
+func Uint32P(name, shorthand string, value uint32, usage string) *uint32 {
+	return CommandLine.Uint32P(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/uint64.go b/go/vendor/github.com/spf13/pflag/uint64.go
new file mode 100644
index 0000000..f62240f
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/uint64.go
@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- uint64 Value
+type uint64Value uint64
+
+func newUint64Value(val uint64, p *uint64) *uint64Value {
+	*p = val
+	return (*uint64Value)(p)
+}
+
+func (i *uint64Value) Set(s string) error {
+	v, err := strconv.ParseUint(s, 0, 64)
+	*i = uint64Value(v)
+	return err
+}
+
+func (i *uint64Value) Type() string {
+	return "uint64"
+}
+
+func (i *uint64Value) String() string { return strconv.FormatUint(uint64(*i), 10) }
+
+func uint64Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseUint(sval, 0, 64)
+	if err != nil {
+		return 0, err
+	}
+	return uint64(v), nil
+}
+
+// GetUint64 return the uint64 value of a flag with the given name
+func (f *FlagSet) GetUint64(name string) (uint64, error) {
+	val, err := f.getFlagType(name, "uint64", uint64Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(uint64), nil
+}
+
+// Uint64Var defines a uint64 flag with specified name, default value, and usage string.
+// The argument p points to a uint64 variable in which to store the value of the flag.
+func (f *FlagSet) Uint64Var(p *uint64, name string, value uint64, usage string) {
+	f.VarP(newUint64Value(value, p), name, "", usage)
+}
+
+// Uint64VarP is like Uint64Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint64VarP(p *uint64, name, shorthand string, value uint64, usage string) {
+	f.VarP(newUint64Value(value, p), name, shorthand, usage)
+}
+
+// Uint64Var defines a uint64 flag with specified name, default value, and usage string.
+// The argument p points to a uint64 variable in which to store the value of the flag.
+func Uint64Var(p *uint64, name string, value uint64, usage string) {
+	CommandLine.VarP(newUint64Value(value, p), name, "", usage)
+}
+
+// Uint64VarP is like Uint64Var, but accepts a shorthand letter that can be used after a single dash.
+func Uint64VarP(p *uint64, name, shorthand string, value uint64, usage string) {
+	CommandLine.VarP(newUint64Value(value, p), name, shorthand, usage)
+}
+
+// Uint64 defines a uint64 flag with specified name, default value, and usage string.
+// The return value is the address of a uint64 variable that stores the value of the flag.
+func (f *FlagSet) Uint64(name string, value uint64, usage string) *uint64 {
+	p := new(uint64)
+	f.Uint64VarP(p, name, "", value, usage)
+	return p
+}
+
+// Uint64P is like Uint64, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint64P(name, shorthand string, value uint64, usage string) *uint64 {
+	p := new(uint64)
+	f.Uint64VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Uint64 defines a uint64 flag with specified name, default value, and usage string.
+// The return value is the address of a uint64 variable that stores the value of the flag.
+func Uint64(name string, value uint64, usage string) *uint64 {
+	return CommandLine.Uint64P(name, "", value, usage)
+}
+
+// Uint64P is like Uint64, but accepts a shorthand letter that can be used after a single dash.
+func Uint64P(name, shorthand string, value uint64, usage string) *uint64 {
+	return CommandLine.Uint64P(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/uint8.go b/go/vendor/github.com/spf13/pflag/uint8.go
new file mode 100644
index 0000000..bb0e83c
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/uint8.go
@@ -0,0 +1,88 @@
+package pflag
+
+import "strconv"
+
+// -- uint8 Value
+type uint8Value uint8
+
+func newUint8Value(val uint8, p *uint8) *uint8Value {
+	*p = val
+	return (*uint8Value)(p)
+}
+
+func (i *uint8Value) Set(s string) error {
+	v, err := strconv.ParseUint(s, 0, 8)
+	*i = uint8Value(v)
+	return err
+}
+
+func (i *uint8Value) Type() string {
+	return "uint8"
+}
+
+func (i *uint8Value) String() string { return strconv.FormatUint(uint64(*i), 10) }
+
+func uint8Conv(sval string) (interface{}, error) {
+	v, err := strconv.ParseUint(sval, 0, 8)
+	if err != nil {
+		return 0, err
+	}
+	return uint8(v), nil
+}
+
+// GetUint8 return the uint8 value of a flag with the given name
+func (f *FlagSet) GetUint8(name string) (uint8, error) {
+	val, err := f.getFlagType(name, "uint8", uint8Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(uint8), nil
+}
+
+// Uint8Var defines a uint8 flag with specified name, default value, and usage string.
+// The argument p points to a uint8 variable in which to store the value of the flag.
+func (f *FlagSet) Uint8Var(p *uint8, name string, value uint8, usage string) {
+	f.VarP(newUint8Value(value, p), name, "", usage)
+}
+
+// Uint8VarP is like Uint8Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint8VarP(p *uint8, name, shorthand string, value uint8, usage string) {
+	f.VarP(newUint8Value(value, p), name, shorthand, usage)
+}
+
+// Uint8Var defines a uint8 flag with specified name, default value, and usage string.
+// The argument p points to a uint8 variable in which to store the value of the flag.
+func Uint8Var(p *uint8, name string, value uint8, usage string) {
+	CommandLine.VarP(newUint8Value(value, p), name, "", usage)
+}
+
+// Uint8VarP is like Uint8Var, but accepts a shorthand letter that can be used after a single dash.
+func Uint8VarP(p *uint8, name, shorthand string, value uint8, usage string) {
+	CommandLine.VarP(newUint8Value(value, p), name, shorthand, usage)
+}
+
+// Uint8 defines a uint8 flag with specified name, default value, and usage string.
+// The return value is the address of a uint8 variable that stores the value of the flag.
+func (f *FlagSet) Uint8(name string, value uint8, usage string) *uint8 {
+	p := new(uint8)
+	f.Uint8VarP(p, name, "", value, usage)
+	return p
+}
+
+// Uint8P is like Uint8, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Uint8P(name, shorthand string, value uint8, usage string) *uint8 {
+	p := new(uint8)
+	f.Uint8VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Uint8 defines a uint8 flag with specified name, default value, and usage string.
+// The return value is the address of a uint8 variable that stores the value of the flag.
+func Uint8(name string, value uint8, usage string) *uint8 {
+	return CommandLine.Uint8P(name, "", value, usage)
+}
+
+// Uint8P is like Uint8, but accepts a shorthand letter that can be used after a single dash.
+func Uint8P(name, shorthand string, value uint8, usage string) *uint8 {
+	return CommandLine.Uint8P(name, shorthand, value, usage)
+}
diff --git a/go/vendor/github.com/spf13/pflag/uint_slice.go b/go/vendor/github.com/spf13/pflag/uint_slice.go
new file mode 100644
index 0000000..edd94c6
--- /dev/null
+++ b/go/vendor/github.com/spf13/pflag/uint_slice.go
@@ -0,0 +1,126 @@
+package pflag
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// -- uintSlice Value
+type uintSliceValue struct {
+	value   *[]uint
+	changed bool
+}
+
+func newUintSliceValue(val []uint, p *[]uint) *uintSliceValue {
+	uisv := new(uintSliceValue)
+	uisv.value = p
+	*uisv.value = val
+	return uisv
+}
+
+func (s *uintSliceValue) Set(val string) error {
+	ss := strings.Split(val, ",")
+	out := make([]uint, len(ss))
+	for i, d := range ss {
+		u, err := strconv.ParseUint(d, 10, 0)
+		if err != nil {
+			return err
+		}
+		out[i] = uint(u)
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		*s.value = append(*s.value, out...)
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *uintSliceValue) Type() string {
+	return "uintSlice"
+}
+
+func (s *uintSliceValue) String() string {
+	out := make([]string, len(*s.value))
+	for i, d := range *s.value {
+		out[i] = fmt.Sprintf("%d", d)
+	}
+	return "[" + strings.Join(out, ",") + "]"
+}
+
+func uintSliceConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// Empty string would cause a slice with one (empty) entry
+	if len(val) == 0 {
+		return []uint{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make([]uint, len(ss))
+	for i, d := range ss {
+		u, err := strconv.ParseUint(d, 10, 0)
+		if err != nil {
+			return nil, err
+		}
+		out[i] = uint(u)
+	}
+	return out, nil
+}
+
+// GetUintSlice returns the []uint value of a flag with the given name.
+func (f *FlagSet) GetUintSlice(name string) ([]uint, error) {
+	val, err := f.getFlagType(name, "uintSlice", uintSliceConv)
+	if err != nil {
+		return []uint{}, err
+	}
+	return val.([]uint), nil
+}
+
+// UintSliceVar defines a uintSlice flag with specified name, default value, and usage string.
+// The argument p points to a []uint variable in which to store the value of the flag.
+func (f *FlagSet) UintSliceVar(p *[]uint, name string, value []uint, usage string) {
+	f.VarP(newUintSliceValue(value, p), name, "", usage)
+}
+
+// UintSliceVarP is like UintSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) UintSliceVarP(p *[]uint, name, shorthand string, value []uint, usage string) {
+	f.VarP(newUintSliceValue(value, p), name, shorthand, usage)
+}
+
+// UintSliceVar defines a uint[] flag with specified name, default value, and usage string.
+// The argument p points to a uint[] variable in which to store the value of the flag.
+func UintSliceVar(p *[]uint, name string, value []uint, usage string) {
+	CommandLine.VarP(newUintSliceValue(value, p), name, "", usage)
+}
+
+// UintSliceVarP is like the UintSliceVar, but accepts a shorthand letter that can be used after a single dash.
+func UintSliceVarP(p *[]uint, name, shorthand string, value []uint, usage string) {
+	CommandLine.VarP(newUintSliceValue(value, p), name, shorthand, usage)
+}
+
+// UintSlice defines a []uint flag with specified name, default value, and usage string.
+// The return value is the address of a []uint variable that stores the value of the flag.
+func (f *FlagSet) UintSlice(name string, value []uint, usage string) *[]uint {
+	p := []uint{}
+	f.UintSliceVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// UintSliceP is like UintSlice, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) UintSliceP(name, shorthand string, value []uint, usage string) *[]uint {
+	p := []uint{}
+	f.UintSliceVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// UintSlice defines a []uint flag with specified name, default value, and usage string.
+// The return value is the address of a []uint variable that stores the value of the flag.
+func UintSlice(name string, value []uint, usage string) *[]uint {
+	return CommandLine.UintSliceP(name, "", value, usage)
+}
+
+// UintSliceP is like UintSlice, but accepts a shorthand letter that can be used after a single dash.
+func UintSliceP(name, shorthand string, value []uint, usage string) *[]uint {
+	return CommandLine.UintSliceP(name, shorthand, value, usage)
+}
diff --git a/go/vendor/golang.org/x/sync/AUTHORS b/go/vendor/golang.org/x/sync/AUTHORS
new file mode 100644
index 0000000..15167cd
--- /dev/null
+++ b/go/vendor/golang.org/x/sync/AUTHORS
@@ -0,0 +1,3 @@
+# This source code refers to The Go Authors for copyright purposes.
+# The master list of authors is in the main Go distribution,
+# visible at http://tip.golang.org/AUTHORS.
diff --git a/go/vendor/golang.org/x/sync/CONTRIBUTORS b/go/vendor/golang.org/x/sync/CONTRIBUTORS
new file mode 100644
index 0000000..1c4577e
--- /dev/null
+++ b/go/vendor/golang.org/x/sync/CONTRIBUTORS
@@ -0,0 +1,3 @@
+# This source code was written by the Go contributors.
+# The master list of contributors is in the main Go distribution,
+# visible at http://tip.golang.org/CONTRIBUTORS.
diff --git a/go/vendor/golang.org/x/sync/LICENSE b/go/vendor/golang.org/x/sync/LICENSE
new file mode 100644
index 0000000..6a66aea
--- /dev/null
+++ b/go/vendor/golang.org/x/sync/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/go/vendor/golang.org/x/sync/PATENTS b/go/vendor/golang.org/x/sync/PATENTS
new file mode 100644
index 0000000..7330990
--- /dev/null
+++ b/go/vendor/golang.org/x/sync/PATENTS
@@ -0,0 +1,22 @@
+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the Go project.
+
+Google hereby grants to You a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this section)
+patent license to make, have made, use, offer to sell, sell, import,
+transfer and otherwise run, modify and propagate the contents of this
+implementation of Go, where such license applies only to those patent
+claims, both currently owned or controlled by Google and acquired in
+the future, licensable by Google that are necessarily infringed by this
+implementation of Go.  This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation.  If you or your agent or exclusive licensee institute or
+order or agree to the institution of patent litigation against any
+entity (including a cross-claim or counterclaim in a lawsuit) alleging
+that this implementation of Go or any code incorporated within this
+implementation of Go constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of Go
+shall terminate as of the date such litigation is filed.
diff --git a/go/vendor/golang.org/x/sync/errgroup/errgroup.go b/go/vendor/golang.org/x/sync/errgroup/errgroup.go
new file mode 100644
index 0000000..533438d
--- /dev/null
+++ b/go/vendor/golang.org/x/sync/errgroup/errgroup.go
@@ -0,0 +1,67 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package errgroup provides synchronization, error propagation, and Context
+// cancelation for groups of goroutines working on subtasks of a common task.
+package errgroup
+
+import (
+	"sync"
+
+	"golang.org/x/net/context"
+)
+
+// A Group is a collection of goroutines working on subtasks that are part of
+// the same overall task.
+//
+// A zero Group is valid and does not cancel on error.
+type Group struct {
+	cancel func()
+
+	wg sync.WaitGroup
+
+	errOnce sync.Once
+	err     error
+}
+
+// WithContext returns a new Group and an associated Context derived from ctx.
+//
+// The derived Context is canceled the first time a function passed to Go
+// returns a non-nil error or the first time Wait returns, whichever occurs
+// first.
+func WithContext(ctx context.Context) (*Group, context.Context) {
+	ctx, cancel := context.WithCancel(ctx)
+	return &Group{cancel: cancel}, ctx
+}
+
+// Wait blocks until all function calls from the Go method have returned, then
+// returns the first non-nil error (if any) from them.
+func (g *Group) Wait() error {
+	g.wg.Wait()
+	if g.cancel != nil {
+		g.cancel()
+	}
+	return g.err
+}
+
+// Go calls the given function in a new goroutine.
+//
+// The first call to return a non-nil error cancels the group; its error will be
+// returned by Wait.
+func (g *Group) Go(f func() error) {
+	g.wg.Add(1)
+
+	go func() {
+		defer g.wg.Done()
+
+		if err := f(); err != nil {
+			g.errOnce.Do(func() {
+				g.err = err
+				if g.cancel != nil {
+					g.cancel()
+				}
+			})
+		}
+	}()
+}