Add builtin NameTransformer plugin.

pkg/target/kusttarget.go

@@ -355,15 +355,6 @@ func (kt *KustTarget) newTransformer(
 	r = append(r, t)
 	r = append(r, transformers.NewNamespaceTransformer(
 		string(kt.kustomization.Namespace), tConfig.NameSpace))
-	t, err = transformers.NewNamePrefixSuffixTransformer(
-		string(kt.kustomization.NamePrefix),
-		string(kt.kustomization.NameSuffix),
-		tConfig.NamePrefix,
-	)
-	if err != nil {
-		return nil, err
-	}
-	r = append(r, t)
 	t, err = transformers.NewLabelsMapTransformer(
 		kt.kustomization.CommonLabels, tConfig.CommonLabels)
 	if err != nil {

pkg/target/kusttarget_configplugin.go

@@ -73,9 +73,13 @@ func (kt *KustTarget) configureBuiltinTransformers(
 	tConfig *config.TransformerConfig) (
 	[]transformers.Transformer, error) {
 	// TODO: Convert remaining legacy transformers to plugins
-	//     (patch SMP/JSON, name prefix/suffix, labels/annos).
-	//     with tests.
+	//   with tests:
+	//   patch SMP
+	//   patch JSON
+	//   labels
+	//   annos
 	configurators := []transformerConfigurator{
+		kt.configureBuiltinNameTransformer,
 		kt.configureBuiltinImageTagTransformer,
 	}
 	var result []transformers.Transformer
@@ -131,6 +135,26 @@ func (kt *KustTarget) configureBuiltinConfigMapGenerator() (
 	return
 }
 
+func (kt *KustTarget) configureBuiltinNameTransformer(
+	tConfig *config.TransformerConfig) (
+	result []transformers.Transformer, err error) {
+	var c struct {
+		Prefix     string
+		Suffix     string
+		FieldSpecs []config.FieldSpec
+	}
+	c.Prefix = kt.kustomization.NamePrefix
+	c.Suffix = kt.kustomization.NameSuffix
+	c.FieldSpecs = tConfig.NamePrefix
+	p := builtingen.NewNameTransformerPlugin()
+	err = kt.configureBuiltinPlugin(p, c, "name")
+	if err != nil {
+		return nil, err
+	}
+	result = append(result, p)
+	return
+}
+
 func (kt *KustTarget) configureBuiltinImageTagTransformer(
 	tConfig *config.TransformerConfig) (
 	result []transformers.Transformer, err error) {

plugin/builtin/NameTransformer.go

@@ -0,0 +1,44 @@
+// +build plugin
+
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+//go:generate go run sigs.k8s.io/kustomize/cmd/pluginator
+package main
+
+import (
+	"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/yaml"
+)
+
+// Add the given prefix and suffix to the resource name.
+type plugin struct {
+	Prefix     string             `json:"prefix,omitempty" yaml:"prefix,omitempty"`
+	Suffix     string             `json:"suffix,omitempty" yaml:"suffix,omitempty"`
+	FieldSpecs []config.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
+}
+
+var KustomizePlugin plugin
+
+func (p *plugin) Config(
+	ldr ifc.Loader, rf *resmap.Factory, c []byte) (err error) {
+	p.Prefix = ""
+	p.Suffix = ""
+	p.FieldSpecs = nil
+	return yaml.Unmarshal(c, p)
+}
+
+func (p *plugin) Transform(m resmap.ResMap) error {
+	t, err := transformers.NewNamePrefixSuffixTransformer(
+		p.Prefix,
+		p.Suffix,
+		p.FieldSpecs,
+	)
+	if err != nil {
+		return err
+	}
+	return t.Transform(m)
+}

plugin/builtin/NameTransformer_test.go

@@ -0,0 +1,54 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package main_test
+
+import (
+	"testing"
+
+	"sigs.k8s.io/kustomize/internal/plugintest"
+	"sigs.k8s.io/kustomize/k8sdeps/kv/plugin"
+	"sigs.k8s.io/kustomize/pkg/kusttest"
+	"sigs.k8s.io/kustomize/pkg/loader"
+)
+
+func TestNameTransformer(t *testing.T) {
+	tc := plugintest_test.NewPluginTestEnv(t).Set()
+	defer tc.Reset()
+
+	tc.BuildGoPlugin(
+		"builtin", "", "NameTransformer")
+
+	th := kusttest_test.NewKustTestHarnessFull(
+		t, "/app", loader.RestrictionRootOnly,
+		plugin.ActivePluginConfig())
+
+	rm := th.LoadAndRunTransformer(`
+apiVersion: builtin
+kind: NameTransformer
+metadata:
+  name: notImportantHere
+prefix: baked-
+suffix: -pie
+fieldSpecs:
+  - path: metadata/name
+`, `
+apiVersion: v1
+kind: Service
+metadata:
+  name: apple
+spec:
+  ports:
+  - port: 7002
+`)
+
+	th.AssertActualEqualsExpected(rm, `
+apiVersion: v1
+kind: Service
+metadata:
+  name: baked-apple-pie
+spec:
+  ports:
+  - port: 7002
+`)
+}

plugin/builtingen/NameTransformer.go

@@ -0,0 +1,41 @@
+// Code generated by pluginator on NameTransformer; DO NOT EDIT.
+package builtingen
+
+import (
+	"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/yaml"
+)
+
+// Add the given prefix and suffix to the resource name.
+type NameTransformerPlugin struct {
+	Prefix     string             `json:"prefix,omitempty" yaml:"prefix,omitempty"`
+	Suffix     string             `json:"suffix,omitempty" yaml:"suffix,omitempty"`
+	FieldSpecs []config.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
+}
+
+func NewNameTransformerPlugin() *NameTransformerPlugin {
+  return &NameTransformerPlugin{}
+}
+
+func (p *NameTransformerPlugin) Config(
+	ldr ifc.Loader, rf *resmap.Factory, c []byte) (err error) {
+	p.Prefix = ""
+	p.Suffix = ""
+	p.FieldSpecs = nil
+	return yaml.Unmarshal(c, p)
+}
+
+func (p *NameTransformerPlugin) Transform(m resmap.ResMap) error {
+	t, err := transformers.NewNamePrefixSuffixTransformer(
+		p.Prefix,
+		p.Suffix,
+		p.FieldSpecs,
+	)
+	if err != nil {
+		return err
+	}
+	return t.Transform(m)
+}