Push suffix/prefix code to plugin.

plugin/someteam.example.com/v1/stringprefixer/StringPrefixer.go

@@ -4,15 +4,20 @@
 package main
 
 import (
+	"github.com/pkg/errors"
 	"sigs.k8s.io/kustomize/pkg/ifc"
 	"sigs.k8s.io/kustomize/pkg/resmap"
 	"sigs.k8s.io/kustomize/pkg/transformers"
 	"sigs.k8s.io/kustomize/pkg/transformers/config"
+	"sigs.k8s.io/kustomize/plugin/builtin"
 	"sigs.k8s.io/yaml"
 )
 
+// Add a string prefix to the name.
+// A plugin that adapts another plugin.
 type plugin struct {
 	Metadata metaData `json:"metadata,omitempty" yaml:"metadata,omitempty"`
+	t        transformers.Transformer
 }
 
 type metaData struct {
@@ -21,17 +26,39 @@ type metaData struct {
 
 var KustomizePlugin plugin
 
-func (p *plugin) Config(
-	ldr ifc.Loader, rf *resmap.Factory, c []byte) error {
-	return yaml.Unmarshal(c, p)
+func (p *plugin) makePrefixSuffixPluginConfig(n string) ([]byte, error) {
+	var s struct {
+		Prefix     string
+		Suffix     string
+		FieldSpecs []config.FieldSpec
+	}
+	s.Prefix = n + "-"
+	s.FieldSpecs = []config.FieldSpec{
+		{Path: "metadata/name"},
+	}
+	return yaml.Marshal(s)
 }
 
-func (p *plugin) Transform(m resmap.ResMap) error {
-	tr, err := transformers.NewPrefixSuffixTransformer(
-		p.Metadata.Name+"-", "",
-		config.MakeDefaultConfig().NamePrefix)
+func (p *plugin) Config(
+	ldr ifc.Loader, rf *resmap.Factory, c []byte) error {
+	err := yaml.Unmarshal(c, p)
 	if err != nil {
 		return err
 	}
-	return tr.Transform(m)
+	c, err = p.makePrefixSuffixPluginConfig(p.Metadata.Name)
+	if err != nil {
+		return err
+	}
+	prefixer := builtin.NewPrefixSuffixTransformerPlugin()
+	err = prefixer.Config(ldr, rf, c)
+	if err != nil {
+		return errors.Wrapf(
+			err, "stringprefixer configure")
+	}
+	p.t = prefixer
+	return nil
+}
+
+func (p *plugin) Transform(m resmap.ResMap) error {
+	return p.t.Transform(m)
 }