generate configmap for pruning

pkg/resource/resource.go

@@ -30,6 +30,7 @@ import (
 type Resource struct {
 	ifc.Kunstructured
 	options *types.GenArgs
+	refBy   []resid.ResId
 }
 
 // String returns resource as JSON.
@@ -43,10 +44,16 @@ func (r *Resource) String() string {
 
 // DeepCopy returns a new copy of resource
 func (r *Resource) DeepCopy() *Resource {
-	return &Resource{
+	rc := &Resource{
 		Kunstructured: r.Kunstructured.Copy(),
 		options:       r.options,
 	}
+	if len(r.refBy) > 0 {
+		refby := make([]resid.ResId, len(r.refBy))
+		copy(refby, r.refBy)
+		rc.refBy = refby
+	}
+	return rc
 }
 
 // Behavior returns the behavior for the resource.
@@ -65,12 +72,26 @@ func (r *Resource) Id() resid.ResId {
 	return resid.NewResIdWithPrefixNamespace(r.GetGvk(), r.GetName(), "", namespace)
 }
 
+// GetRefBy returns the ResIds that referred to current resource
+func (r *Resource) GetRefBy() []resid.ResId {
+	return r.refBy
+}
+
+// AppendRefBy appends a ResId into the refBy list
+func (r *Resource) AppendRefBy(id resid.ResId) {
+	r.refBy = append(r.refBy, id)
+}
+
 // Merge performs merge with other resource.
 func (r *Resource) Merge(other *Resource) {
 	r.Replace(other)
 	mergeConfigmap(r.Map(), other.Map(), r.Map())
 }
 
+func (r *Resource) PruneString() string {
+	return r.Id().PruneString()
+}
+
 // Replace performs replace with other resource.
 func (r *Resource) Replace(other *Resource) {
 	r.SetLabels(mergeStringMaps(other.GetLabels(), r.GetLabels()))

pkg/resource/resource_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package resource_test
 
 import (
+	"reflect"
 	"testing"
 
 	"sigs.k8s.io/kustomize/k8sdeps/kunstruct"
@@ -94,3 +95,20 @@ func TestResourceId(t *testing.T) {
 		}
 	}
 }
+
+func TestDeepCopy(t *testing.T) {
+	r := factory.FromMap(
+		map[string]interface{}{
+			"apiVersion": "apps/v1",
+			"kind":       "Deployment",
+			"metadata": map[string]interface{}{
+				"name": "pooh",
+			},
+		})
+	r.AppendRefBy(resid.NewResId(gvk.Gvk{Group: "somegroup", Kind: "MyKind"}, "random"))
+
+	cr := r.DeepCopy()
+	if !reflect.DeepEqual(r, cr) {
+		t.Errorf("expected %v\nbut got%v", r, cr)
+	}
+}