Make plugin dir match Go conventions.

pkg/plugins/compiler_test.go

@@ -36,6 +36,7 @@ func TestCompiler(t *testing.T) {
 	if configRoot != c.ObjRoot() {
 		t.Errorf("unexpected objRoot %s", c.ObjRoot())
 	}
+
 	expectObj := filepath.Join(
 		c.ObjRoot(),
 		"someteam.example.com", "v1", "DatePrefixer.so")
@@ -49,6 +50,21 @@ func TestCompiler(t *testing.T) {
 	if !RecentFileExists(expectObj) {
 		t.Errorf("didn't find expected obj file %s", expectObj)
 	}
+
+	expectObj = filepath.Join(
+		c.ObjRoot(),
+		"builtin", "", "SecretGenerator.so")
+	if FileExists(expectObj) {
+		t.Errorf("obj file should not exist yet: %s", expectObj)
+	}
+	err = c.Compile("builtin", "", "SecretGenerator")
+	if err != nil {
+		t.Error(err)
+	}
+	if !RecentFileExists(expectObj) {
+		t.Errorf("didn't find expected obj file %s", expectObj)
+	}
+
 	err = os.RemoveAll(c.ObjRoot())
 	if err != nil {
 		t.Errorf(

pkg/plugins/execplugin_test.go

@@ -53,7 +53,7 @@ s/$BAR/bar/g
 
 	p.Config(ldr, rf, pluginConfig)
 
-	expected := "/kustomize/plugins/someteam.example.com/v1/SedTransformer"
+	expected := "/kustomize/plugin/someteam.example.com/v1/SedTransformer"
 	if !strings.HasSuffix(p.name, expected) {
 		t.Fatalf("expected suffix '%s', got '%s'", expected, p.name)
 	}

pkg/plugins/loader_test.go

@@ -29,7 +29,8 @@ import (
 )
 
 const (
-	secretGenerator = `apiVersion: kustomize.config.k8s.io/v1
+	secretGenerator = `
+apiVersion: builtin
 kind: SecretGenerator
 metadata:
   name: secretGenerator
@@ -59,7 +60,7 @@ func TestLoader(t *testing.T) {
 	defer tc.Reset()
 
 	tc.BuildGoPlugin(
-		"kustomize.config.k8s.io", "v1", "SecretGenerator")
+		"builtin", "", "SecretGenerator")
 	tc.BuildGoPlugin(
 		"someteam.example.com", "v1", "ServiceGenerator")