Introduce ResId and ResMap.

pkg/resource/resid.go

@@ -0,0 +1,50 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package resource
+
+import (
+	"strings"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// ResId conflates GroupVersionKind with a textual name to uniquely identify a kubernetes resource (object).
+type ResId struct {
+	// GroupVersionKind of the resource.
+	gvk schema.GroupVersionKind
+	// original name of the resource before transformation.
+	name string
+}
+
+func NewResId(g schema.GroupVersionKind, n string) ResId {
+	return ResId{gvk: g, name: n}
+}
+
+func (n ResId) String() string {
+	if n.gvk.Group == "" {
+		return strings.Join([]string{n.gvk.Version, n.gvk.Kind, n.name}, "_") + ".yaml"
+	}
+	return strings.Join([]string{n.gvk.Group, n.gvk.Version, n.gvk.Kind, n.name}, "_") + ".yaml"
+}
+
+func (n ResId) Gvk() schema.GroupVersionKind {
+	return n.gvk
+}
+
+func (n ResId) Name() string {
+	return n.name
+}