Add support for using common base

pkg/resource/resid.go

@@ -28,18 +28,49 @@ type ResId struct {
 	gvk schema.GroupVersionKind
 	// original name of the resource before transformation.
 	name string
+	// namePrefix of the resource
+	// an untransformed resource has no prefix, fully transformed resource has an arbitrary number of prefixes
+	// concatenated together.
+	prefix string
+}
+
+// NewResIdWithPrefix creates new resource identifier with a prefix
+func NewResIdWithPrefix(g schema.GroupVersionKind, n, p string) ResId {
+	return ResId{gvk: g, name: n, prefix: p}
 }
 
 // NewResId creates new resource identifier
 func NewResId(g schema.GroupVersionKind, n string) ResId {
-	return ResId{gvk: g, name: n}
+	return NewResIdWithPrefix(g, n, "")
 }
 
+// String of ResId based on GVK, name and prefix
 func (n ResId) String() string {
+	//var fields []string
+	//for _, s := range []string{n.gvk.Group, n.gvk.Version, n.gvk.Kind, n.prefix, n.name} {
+	//	if s != "" {
+	//		fields = append(fields, s)
+	//	}
+	//}
+	//return strings.Join(fields, "_") + ".yaml"
+	fields := []string{n.gvk.Group, n.gvk.Version, n.gvk.Kind, n.prefix, n.name}
+	return strings.Join(fields, "_") + ".yaml"
+}
+
+// GvknString of ResId based on GVK and name
+func (n ResId) GvknString() 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"
+
+}
+
+// GvknEquals return if two ResId have the same Group/Version/Kind and name
+// The comparison excludes prefix
+func (n ResId) GvknEquals(id ResId) bool {
+	return n.gvk.Group == id.gvk.Group && n.gvk.Version == id.gvk.Version &&
+		n.gvk.Kind == id.gvk.Kind && n.name == id.name
 }
 
 // Gvk returns Group/Version/Kind of the resource.
@@ -51,3 +82,13 @@ func (n ResId) Gvk() schema.GroupVersionKind {
 func (n ResId) Name() string {
 	return n.name
 }
+
+// Prefix returns name prefix.
+func (n ResId) Prefix() string {
+	return n.prefix
+}
+
+// CopyWithNewPrefix make a new copy from current ResId and append a new prefix
+func (n ResId) CopyWithNewPrefix(p string) ResId {
+	return ResId{gvk: n.gvk, name: n.name, prefix: p + n.prefix}
+}