diff --git a/go/vendor/github.com/gobuffalo/packr/walk.go b/go/vendor/github.com/gobuffalo/packr/walk.go
new file mode 100644
index 0000000..21f2563
--- /dev/null
+++ b/go/vendor/github.com/gobuffalo/packr/walk.go
@@ -0,0 +1,63 @@
+package packr
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/pkg/errors"
+)
+
+type WalkFunc func(string, File) error
+
+// Walk will traverse the box and call the WalkFunc for each file in the box/folder.
+func (b Box) Walk(wf WalkFunc) error {
+	if data[b.Path] == nil {
+		base, err := filepath.EvalSymlinks(filepath.Join(b.callingDir, b.Path))
+		if err != nil {
+			return errors.WithStack(err)
+		}
+		return filepath.Walk(base, func(path string, info os.FileInfo, err error) error {
+			cleanName, err := filepath.Rel(base, path)
+			if err != nil {
+				cleanName = strings.TrimPrefix(path, base)
+			}
+			cleanName = filepath.ToSlash(filepath.Clean(cleanName))
+			cleanName = strings.TrimPrefix(cleanName, "/")
+			cleanName = filepath.FromSlash(cleanName)
+			if info == nil || info.IsDir() {
+				return nil
+			}
+
+			file, err := fileFor(path, cleanName)
+			if err != nil {
+				return err
+			}
+			return wf(cleanName, file)
+		})
+	}
+	for n := range data[b.Path] {
+		f, err := b.find(n)
+		if err != nil {
+			return err
+		}
+		err = wf(n, f)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// WalkPrefix will call box.Walk and call the WalkFunc when it finds paths that have a matching prefix
+func (b Box) WalkPrefix(prefix string, wf WalkFunc) error {
+	opre := osPath(prefix)
+	return b.Walk(func(path string, f File) error {
+		if strings.HasPrefix(osPath(path), opre) {
+			if err := wf(path, f); err != nil {
+				return errors.WithStack(err)
+			}
+		}
+		return nil
+	})
+}