add goplugin for exec generators and transformers

pkg/target/generatorplugin_test.go

@@ -127,3 +127,37 @@ metadata:
 type: Opaque
 `)
 }
+
+func TestConfigMapGenerator(t *testing.T) {
+	tc := NewTestEnvController(t).Set()
+	//defer tc.Reset()
+
+	tc.BuildExecPlugin(
+		"someteam.example.com", "v1", "ConfigMapGenerator")
+
+	th := NewKustTestHarnessWithPluginConfig(
+		t, "/app", plugin.ActivePluginConfig())
+	th.writeK("/app", `
+generators:
+- configmapGenerator.yaml
+`)
+	th.writeF("/app/configmapGenerator.yaml", `
+apiVersion: someteam.example.com/v1
+kind: ConfigMapGenerator
+metadata:
+  name: some-random-name
+`)
+	m, err := th.makeKustTarget().MakeCustomizedResMap()
+	if err != nil {
+		t.Fatalf("Err: %v", err)
+	}
+	th.assertActualEqualsExpected(m, `
+apiVersion: v1
+data:
+  password: secret
+  username: admin
+kind: ConfigMap
+metadata:
+  name: example-configmap-test
+`)
+}

pkg/target/testenvcontroller_test.go

@@ -16,6 +16,7 @@ package target_test
 import (
 	"io/ioutil"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"sigs.k8s.io/kustomize/k8sdeps/kv/plugin"
 	"testing"
@@ -57,6 +58,28 @@ func (x *TestEnvController) BuildGoPlugin(g, v, k string) {
 	}
 }
 
+func (x *TestEnvController) BuildExecPlugin(name ...string) {
+	obj := filepath.Join(
+		append([]string{x.workDir, pgmconfig.ProgramName, plugin.PluginRoot}, name...)...)
+
+	srcRoot, err := plugins.DefaultSrcRoot()
+	if err != nil {
+		x.t.Error(err)
+	}
+
+	src := filepath.Join(
+		append([]string{srcRoot}, name...)...)
+
+	if err := os.MkdirAll(filepath.Dir(obj), 0755); err != nil {
+		x.t.Errorf("error making directory: %s", filepath.Dir(obj))
+	}
+	cmd := exec.Command("cp", src, obj)
+	cmd.Env = os.Environ()
+	if err := cmd.Run(); err != nil {
+		x.t.Errorf("error copying %s: %v", src, err)
+	}
+}
+
 func (x *TestEnvController) makeCompiler() *plugins.Compiler {
 	// The plugin loader wants to find object code under
 	//    $XDG_CONFIG_HOME/kustomize/plugins