Merge pull request #64072 from CaoShuFeng/show_kind

Automatic merge from submit-queue (batch tested with PRs 64034, 64072, 64146, 64059, 64161). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

fix kubectl get --show-kind

This pull request fix `kubectl get --show-kind`
Before this change:
```json
$ kubectl get pods --show-kind
NAME                    READY     STATUS      RESTARTS   AGE
pi-with-timeout-52sjs   0/1       Completed   0          1d
pi-with-timeout-f5pb5   0/1       Completed   0          1d
```
After this change:
```
$ kubectl get pods --show-kind
NAME                        READY     STATUS      RESTARTS   AGE
pod/pi-with-timeout-52sjs   0/1       Completed   0          1d
pod/pi-with-timeout-f5pb5   0/1       Completed   0          1d
```


**What this PR does / why we need it**:

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:
/assign @soltysh 
**Release note**:

```release-note
NONE
```

pkg/kubectl/cmd/get/get.go

@@ -219,6 +219,9 @@ func (o *GetOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []stri
 
 	o.IncludeUninitialized = cmdutil.ShouldIncludeUninitialized(cmd, false)
 
+	if resource.MultipleTypesRequested(args) {
+		o.PrintFlags.EnsureWithKind()
+	}
 	o.ToPrinter = func(mapping *meta.RESTMapping, withNamespace bool) (printers.ResourcePrinterFunc, error) {
 		// make a new copy of current flags / opts before mutating
 		printFlags := o.PrintFlags.Copy()
@@ -229,9 +232,7 @@ func (o *GetOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []stri
 					printFlags.UseOpenAPIColumns(apiSchema, mapping)
 				}
 			}
-			if resource.MultipleTypesRequested(args) {
-				printFlags.EnsureWithKind(mapping.GroupVersionKind.GroupKind())
-			}
+			printFlags.SetKind(mapping.GroupVersionKind.GroupKind())
 		}
 		if withNamespace {
 			printFlags.EnsureWithNamespace()

pkg/kubectl/cmd/get/get_flags.go

@@ -41,6 +41,11 @@ type PrintFlags struct {
 	OutputFormat *string
 }
 
+// SetKind sets the Kind option of humanreadable flags
+func (f *PrintFlags) SetKind(kind schema.GroupKind) {
+	f.HumanReadableFlags.SetKind(kind)
+}
+
 // EnsureWithNamespace ensures that humanreadable flags return
 // a printer capable of printing with a "namespace" column.
 func (f *PrintFlags) EnsureWithNamespace() error {
@@ -49,8 +54,8 @@ func (f *PrintFlags) EnsureWithNamespace() error {
 
 // EnsureWithKind ensures that humanreadable flags return
 // a printer capable of including resource kinds.
-func (f *PrintFlags) EnsureWithKind(kind schema.GroupKind) error {
-	return f.HumanReadableFlags.EnsureWithKind(kind)
+func (f *PrintFlags) EnsureWithKind() error {
+	return f.HumanReadableFlags.EnsureWithKind()
 }
 
 // Copy returns a copy of PrintFlags for mutation

pkg/kubectl/cmd/get/get_test.go

@@ -329,6 +329,60 @@ foo       0/0                 0          <unknown>
 	}
 }
 
+func TestGetObjectsShowKind(t *testing.T) {
+	pods, _, _ := testData()
+
+	tf := cmdtesting.NewTestFactory()
+	defer tf.Cleanup()
+	codec := legacyscheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
+
+	tf.UnstructuredClient = &fake.RESTClient{
+		NegotiatedSerializer: unstructuredSerializer,
+		Resp:                 &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, &pods.Items[0])},
+	}
+	tf.Namespace = "test"
+
+	streams, _, buf, _ := genericclioptions.NewTestIOStreams()
+	cmd := NewCmdGet("kubectl", tf, streams)
+	cmd.SetOutput(buf)
+	cmd.Flags().Set("show-kind", "true")
+	cmd.Run(cmd, []string{"pods", "foo"})
+
+	expected := `NAME      READY     STATUS    RESTARTS   AGE
+pod/foo   0/0                 0          <unknown>
+`
+	if e, a := expected, buf.String(); e != a {
+		t.Errorf("expected %v, got %v", e, a)
+	}
+}
+
+func TestGetObjectsShowLabels(t *testing.T) {
+	pods, _, _ := testData()
+
+	tf := cmdtesting.NewTestFactory()
+	defer tf.Cleanup()
+	codec := legacyscheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
+
+	tf.UnstructuredClient = &fake.RESTClient{
+		NegotiatedSerializer: unstructuredSerializer,
+		Resp:                 &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, &pods.Items[0])},
+	}
+	tf.Namespace = "test"
+
+	streams, _, buf, _ := genericclioptions.NewTestIOStreams()
+	cmd := NewCmdGet("kubectl", tf, streams)
+	cmd.SetOutput(buf)
+	cmd.Flags().Set("show-labels", "true")
+	cmd.Run(cmd, []string{"pods", "foo"})
+
+	expected := `NAME      READY     STATUS    RESTARTS   AGE         LABELS
+foo       0/0                 0          <unknown>   <none>
+`
+	if e, a := expected, buf.String(); e != a {
+		t.Errorf("expected %v, got %v", e, a)
+	}
+}
+
 func TestGetObjectIgnoreNotFound(t *testing.T) {
 	initTestErrorHandler(t)
 

pkg/kubectl/cmd/get/humanreadable_flags.go

@@ -43,13 +43,14 @@ type HumanPrintFlags struct {
 	WithNamespace      bool
 }
 
-// EnsureWithKind sets the provided GroupKind humanreadable value.
-// If the kind received is non-empty, the "showKind" humanreadable
-// printer option is set to true.
-func (f *HumanPrintFlags) EnsureWithKind(kind schema.GroupKind) error {
-	showKind := !kind.Empty()
-
+// SetKind sets the Kind option
+func (f *HumanPrintFlags) SetKind(kind schema.GroupKind) {
 	f.Kind = kind
+}
+
+// EnsureWithKind sets the "Showkind" humanreadable option to true.
+func (f *HumanPrintFlags) EnsureWithKind() error {
+	showKind := true
 	f.ShowKind = &showKind
 	return nil
 }