update PruneString for resources

k8sdeps/transformer/prune/prune.go

@@ -59,11 +59,12 @@ func NewPruneTransformer(p *types.Prune, namespace string, append bool) transfor
 // which is proposed in https://github.com/kubernetes/enhancements/pull/810
 func (o *pruneTransformer) Transform(m resmap.ResMap) error {
 	keys := []string{}
-	for id, r := range m {
-		s := id.PruneString()
+	for _, r := range m {
+		s := r.PruneString()
 		keys = append(keys, s)
 		for _, refid := range r.GetRefBy() {
-			keys = append(keys, s+"---"+refid.PruneString())
+			ref := m[refid]
+			keys = append(keys, s+"---"+ref.PruneString())
 		}
 	}
 	h, err := hash.SortArrayAndComputeHash(keys)

k8sdeps/transformer/prune/prune_test.go

@@ -54,8 +54,7 @@ func makeResMap() resmap.ResMap {
 			}),
 		resid.NewResId(deploy, "deploy1"): rf.FromMap(
 			map[string]interface{}{
-				"group":      "apps",
-				"apiVersion": "v1",
+				"apiVersion": "apps/v1",
 				"kind":       "Deployment",
 				"metadata": map[string]interface{}{
 					"name": "deploy1",