| // Copyright 2017 The kubecfg authors |
| // |
| // |
| // 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 utils |
| |
| import ( |
| "bytes" |
| "encoding/json" |
| "io" |
| "regexp" |
| "strings" |
| |
| goyaml "github.com/ghodss/yaml" |
| |
| jsonnet "github.com/google/go-jsonnet" |
| jsonnetAst "github.com/google/go-jsonnet/ast" |
| "k8s.io/apimachinery/pkg/util/yaml" |
| ) |
| |
| func resolveImage(resolver Resolver, image string) (string, error) { |
| n, err := ParseImageName(image) |
| if err != nil { |
| return "", err |
| } |
| |
| if err := resolver.Resolve(&n); err != nil { |
| return "", err |
| } |
| |
| return n.String(), nil |
| } |
| |
| // RegisterNativeFuncs adds kubecfg's native jsonnet functions to provided VM |
| func RegisterNativeFuncs(vm *jsonnet.VM, resolver Resolver) { |
| // TODO(mkm): go-jsonnet 0.12.x now contains native std.parseJson; deprecate and remove this one. |
| vm.NativeFunction(&jsonnet.NativeFunction{ |
| Name: "parseJson", |
| Params: []jsonnetAst.Identifier{"json"}, |
| Func: func(args []interface{}) (res interface{}, err error) { |
| data := []byte(args[0].(string)) |
| err = json.Unmarshal(data, &res) |
| return |
| }, |
| }) |
| |
| vm.NativeFunction(&jsonnet.NativeFunction{ |
| Name: "parseYaml", |
| Params: []jsonnetAst.Identifier{"yaml"}, |
| Func: func(args []interface{}) (res interface{}, err error) { |
| ret := []interface{}{} |
| data := []byte(args[0].(string)) |
| d := yaml.NewYAMLToJSONDecoder(bytes.NewReader(data)) |
| for { |
| var doc interface{} |
| if err := d.Decode(&doc); err != nil { |
| if err == io.EOF { |
| break |
| } |
| return nil, err |
| } |
| ret = append(ret, doc) |
| } |
| return ret, nil |
| }, |
| }) |
| |
| vm.NativeFunction(&jsonnet.NativeFunction{ |
| Name: "manifestJson", |
| Params: []jsonnetAst.Identifier{"json", "indent"}, |
| Func: func(args []interface{}) (res interface{}, err error) { |
| value := args[0] |
| indent := int(args[1].(float64)) |
| data, err := json.MarshalIndent(value, "", strings.Repeat(" ", indent)) |
| if err != nil { |
| return "", err |
| } |
| data = append(data, byte('\n')) |
| return string(data), nil |
| }, |
| }) |
| |
| vm.NativeFunction(&jsonnet.NativeFunction{ |
| Name: "manifestYaml", |
| Params: []jsonnetAst.Identifier{"json"}, |
| Func: func(args []interface{}) (res interface{}, err error) { |
| value := args[0] |
| output, err := goyaml.Marshal(value) |
| return string(output), err |
| }, |
| }) |
| |
| vm.NativeFunction(&jsonnet.NativeFunction{ |
| Name: "resolveImage", |
| Params: []jsonnetAst.Identifier{"image"}, |
| Func: func(args []interface{}) (res interface{}, err error) { |
| return resolveImage(resolver, args[0].(string)) |
| }, |
| }) |
| |
| vm.NativeFunction(&jsonnet.NativeFunction{ |
| Name: "escapeStringRegex", |
| Params: []jsonnetAst.Identifier{"str"}, |
| Func: func(args []interface{}) (res interface{}, err error) { |
| return regexp.QuoteMeta(args[0].(string)), nil |
| }, |
| }) |
| |
| vm.NativeFunction(&jsonnet.NativeFunction{ |
| Name: "regexMatch", |
| Params: []jsonnetAst.Identifier{"regex", "string"}, |
| Func: func(args []interface{}) (res interface{}, err error) { |
| return regexp.MatchString(args[0].(string), args[1].(string)) |
| }, |
| }) |
| |
| vm.NativeFunction(&jsonnet.NativeFunction{ |
| Name: "regexSubst", |
| Params: []jsonnetAst.Identifier{"regex", "src", "repl"}, |
| Func: func(args []interface{}) (res interface{}, err error) { |
| regex := args[0].(string) |
| src := args[1].(string) |
| repl := args[2].(string) |
| |
| r, err := regexp.Compile(regex) |
| if err != nil { |
| return "", err |
| } |
| return r.ReplaceAllString(src, repl), nil |
| }, |
| }) |
| } |