Make plugin dir match Go conventions.

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

@@ -0,0 +1,46 @@
+// +build plugin
+
+// Assuming GOPATH is something like
+//   ~/gopath
+// and this source file is located at
+//   $GOPATH/src/sigs.k8s.io/kustomize/plugins/StringPrefixer.go,
+// build it like this:
+//   dir=$GOPATH/src/sigs.k8s.io/kustomize/plugins
+//   go build -buildmode plugin -tags=plugin \
+//     -o $dir/StringPrefixer.so $dir/StringPrefixer.go
+
+package main
+
+import (
+	"fmt"
+	"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"
+)
+
+type plugin struct {
+	prefix string
+}
+
+var KustomizePlugin plugin
+
+func (p *plugin) Config(
+	ldr ifc.Loader, rf *resmap.Factory, k ifc.Kunstructured) error {
+	name := k.GetName()
+	if name == "" {
+		return fmt.Errorf("name cannot be empty")
+	}
+	p.prefix = name + "-"
+	return nil
+}
+
+func (p *plugin) Transform(m resmap.ResMap) error {
+	tr, err := transformers.NewNamePrefixSuffixTransformer(
+		p.prefix, "",
+		config.MakeDefaultConfig().NamePrefix)
+	if err != nil {
+		return err
+	}
+	return tr.Transform(m)
+}