client-go: simplify deepcopy calls

Kubernetes-commit: ed423054ba0089a6d58fb0e048fe1acfd966f0d7

testing/fixture.go

@@ -183,10 +183,7 @@ func (t *tracker) List(gvr schema.GroupVersionResource, gvk schema.GroupVersionK
 	if err := meta.SetList(list, matchingObjs); err != nil {
 		return nil, err
 	}
-	if list, err = t.scheme.Copy(list); err != nil {
+	return list.DeepCopyObject(), nil
-		return nil, err
-	}
-	return list, nil
 }
 
 func (t *tracker) Get(gvr schema.GroupVersionResource, ns, name string) (runtime.Object, error) {
@@ -214,11 +211,7 @@ func (t *tracker) Get(gvr schema.GroupVersionResource, ns, name string) (runtime
 	// Only one object should match in the tracker if it works
 	// correctly, as Add/Update methods enforce kind/namespace/name
 	// uniqueness.
-	obj, err := t.scheme.Copy(matchingObjs[0])
+	obj := matchingObjs[0].DeepCopyObject()
-	if err != nil {
-		return nil, err
-	}
-
 	if status, ok := obj.(*metav1.Status); ok {
 		if status.Status != metav1.StatusSuccess {
 			return nil, &errors.StatusError{ErrStatus: *status}
@@ -280,10 +273,7 @@ func (t *tracker) add(gvr schema.GroupVersionResource, obj runtime.Object, ns st
 	// To avoid the object from being accidentally modified by caller
 	// after it's been added to the tracker, we always store the deep
 	// copy.
-	obj, err := t.scheme.Copy(obj)
+	obj = obj.DeepCopyObject()
-	if err != nil {
-		return err
-	}
 
 	newMeta, err := meta.Accessor(obj)
 	if err != nil {

tools/cache/BUILD

@@ -33,7 +33,6 @@ go_test(
         "//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/wait:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/watch:go_default_library",
-        "//vendor/k8s.io/client-go/kubernetes/scheme:go_default_library",
         "//vendor/k8s.io/client-go/tools/cache/testing:go_default_library",
     ],
 )
@@ -78,7 +77,6 @@ go_library(
         "//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/wait:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/watch:go_default_library",
-        "//vendor/k8s.io/client-go/kubernetes/scheme:go_default_library",
         "//vendor/k8s.io/client-go/rest:go_default_library",
         "//vendor/k8s.io/client-go/tools/pager:go_default_library",
     ],

tools/cache/index_test.go

@@ -22,7 +22,6 @@ import (
 
 	"k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/client-go/kubernetes/scheme"
 )
 
 func testIndexFunc(obj interface{}) ([]string, error) {
@@ -119,11 +118,7 @@ func TestMultiIndexKeys(t *testing.T) {
 		t.Errorf("Expected 0 pods but got %v", len(elmoPods))
 	}
 
-	obj, err := scheme.Scheme.DeepCopy(pod2)
+	copyOfPod2 := pod2.DeepCopy()
-	if err != nil {
-		t.Errorf("unexpected error: %v", err)
-	}
-	copyOfPod2 := obj.(*v1.Pod)
 	copyOfPod2.Annotations["users"] = "oscar"
 	index.Update(copyOfPod2)
 	bertPods, err = index.ByIndex("byUser", "bert")

tools/cache/mutation_detector.go

@@ -26,7 +26,6 @@ import (
 
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/util/diff"
-	"k8s.io/client-go/kubernetes/scheme"
 )
 
 var mutationDetectionEnabled = false
@@ -96,18 +95,13 @@ func (d *defaultCacheMutationDetector) AddObject(obj interface{}) {
 	if _, ok := obj.(DeletedFinalStateUnknown); ok {
 		return
 	}
-	if _, ok := obj.(runtime.Object); !ok {
+	if obj, ok := obj.(runtime.Object); ok {
-		return
+		copiedObj := obj.DeepCopyObject()
-	}
-
-	copiedObj, err := scheme.Scheme.Copy(obj.(runtime.Object))
-	if err != nil {
-		return
-	}
 
 		d.lock.Lock()
 		defer d.lock.Unlock()
 		d.cachedObjs = append(d.cachedObjs, cacheObj{cached: obj, copied: copiedObj})
+	}
 }
 
 func (d *defaultCacheMutationDetector) CompareObjects() {

tools/cache/testing/BUILD

@@ -27,7 +27,6 @@ go_library(
         "//vendor/k8s.io/apimachinery/pkg/runtime:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/watch:go_default_library",
-        "//vendor/k8s.io/client-go/kubernetes/scheme:go_default_library",
     ],
 )
 

tools/cache/testing/fake_controller_source.go

@@ -28,7 +28,6 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apimachinery/pkg/watch"
-	"k8s.io/client-go/kubernetes/scheme"
 )
 
 func NewFakeControllerSource() *FakeControllerSource {
@@ -153,11 +152,7 @@ func (f *FakeControllerSource) getListItemsLocked() ([]runtime.Object, error) {
 		// Otherwise, if they make a change and write it back, they
 		// will inadvertently change our canonical copy (in
 		// addition to racing with other clients).
-		objCopy, err := scheme.Scheme.DeepCopy(obj)
+		list = append(list, obj.DeepCopyObject())
-		if err != nil {
-			return nil, err
-		}
-		list = append(list, objCopy.(runtime.Object))
 	}
 	return list, nil
 }
@@ -242,11 +237,7 @@ func (f *FakeControllerSource) Watch(options metav1.ListOptions) (watch.Interfac
 			// it back, they will inadvertently change the our
 			// canonical copy (in addition to racing with other
 			// clients).
-			objCopy, err := scheme.Scheme.DeepCopy(c.Object)
+			changes = append(changes, watch.Event{Type: c.Type, Object: c.Object.DeepCopyObject()})
-			if err != nil {
-				return nil, err
-			}
-			changes = append(changes, watch.Event{Type: c.Type, Object: objCopy.(runtime.Object)})
 		}
 		return f.Broadcaster.WatchWithPrefix(changes), nil
 	} else if rc > len(f.changes) {