Added warning msg for kubectl get

- added warning description regarding terminated objects to `get` long help message
  - added printing of warning message in case of `get pods` if there are hidden pods
Fixes #22986

pkg/kubectl/cmd/cmd.go

@@ -233,7 +233,7 @@ Find more information at https://github.com/kubernetes/kubernetes.`,
 	// From this point and forward we get warnings on flags that contain "_" separators
 	cmds.SetGlobalNormalizationFunc(flag.WarnWordSepNormalizeFunc)
 
-	cmds.AddCommand(NewCmdGet(f, out))
+	cmds.AddCommand(NewCmdGet(f, out, err))
 	cmds.AddCommand(set.NewCmdSet(f, out))
 	cmds.AddCommand(NewCmdDescribe(f, out))
 	cmds.AddCommand(NewCmdCreate(f, out))

pkg/kubectl/cmd/cmd_test.go

@@ -165,6 +165,10 @@ func (t *testPrinter) HandledResources() []string {
 	return []string{}
 }
 
+func (t *testPrinter) FinishPrint(output io.Writer, res string) error {
+	return nil
+}
+
 type testDescriber struct {
 	Name, Namespace string
 	Settings        kubectl.DescriberSettings

pkg/kubectl/cmd/get.go

@@ -44,6 +44,9 @@ var (
 
 		`) + kubectl.PossibleResourceTypes + dedent.Dedent(`
 
+		This command will hide resources that have completed. For instance, pods that are in the Succeeded or Failed phases.
+		You can see the full results for any resource by providing the '--show-all' flag.
+
 		By specifying the output as 'template' and providing a Go template as the value
 		of the --template flag, you can filter the attributes of the fetched resource(s).`)
 	get_example = dedent.Dedent(`
@@ -74,7 +77,7 @@ var (
 
 // NewCmdGet creates a command object for the generic "get" action, which
 // retrieves one or more resources from a server.
-func NewCmdGet(f *cmdutil.Factory, out io.Writer) *cobra.Command {
+func NewCmdGet(f *cmdutil.Factory, out io.Writer, errOut io.Writer) *cobra.Command {
 	options := &GetOptions{}
 
 	// retrieve a list of handled resources from printer as valid args
@@ -94,7 +97,7 @@ func NewCmdGet(f *cmdutil.Factory, out io.Writer) *cobra.Command {
 		Long:    get_long,
 		Example: get_example,
 		Run: func(cmd *cobra.Command, args []string) {
-			err := RunGet(f, out, cmd, args, options)
+			err := RunGet(f, out, errOut, cmd, args, options)
 			cmdutil.CheckErr(err)
 		},
 		SuggestFor: []string{"list", "ps"},
@@ -118,7 +121,7 @@ func NewCmdGet(f *cmdutil.Factory, out io.Writer) *cobra.Command {
 
 // RunGet implements the generic Get command
 // TODO: convert all direct flag accessors to a struct and pass that instead of cmd
-func RunGet(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string, options *GetOptions) error {
+func RunGet(f *cmdutil.Factory, out io.Writer, errOut io.Writer, cmd *cobra.Command, args []string, options *GetOptions) error {
 	selector := cmdutil.GetFlagString(cmd, "selector")
 	allNamespaces := cmdutil.GetFlagBool(cmd, "all-namespaces")
 	showKind := cmdutil.GetFlagBool(cmd, "show-kind")
@@ -177,7 +180,6 @@ func RunGet(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string
 		if err != nil {
 			return err
 		}
-
 		obj, err := r.Object()
 		if err != nil {
 			return err
@@ -203,6 +205,7 @@ func RunGet(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string
 			if err := printer.PrintObj(obj, out); err != nil {
 				return fmt.Errorf("unable to output the provided object: %v", err)
 			}
+			printer.FinishPrint(errOut, mapping.Resource)
 		}
 
 		// print watched changes
@@ -218,7 +221,11 @@ func RunGet(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string
 				first = false
 				return nil
 			}
-			return printer.PrintObj(e.Object, out)
+			err := printer.PrintObj(e.Object, out)
+			if err == nil {
+				printer.FinishPrint(errOut, mapping.Resource)
+			}
+			return err
 		})
 		return nil
 	}
@@ -265,6 +272,10 @@ func RunGet(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string
 		if err != nil {
 			return err
 		}
+		res := ""
+		if len(infos) > 0 {
+			res = infos[0].ResourceMapping().Resource
+		}
 
 		obj, err := resource.AsVersionedObject(infos, !singular, version, f.JSONEncoder())
 		if err != nil {
@@ -274,6 +285,7 @@ func RunGet(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string
 		if err := printer.PrintObj(obj, out); err != nil {
 			allErrs = append(allErrs, err)
 		}
+		printer.FinishPrint(errOut, res)
 		return utilerrors.NewAggregate(allErrs)
 	}
 
@@ -322,7 +334,6 @@ func RunGet(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string
 	printer = nil
 	var lastMapping *meta.RESTMapping
 	w := kubectl.GetNewTabWriter(out)
-	defer w.Flush()
 
 	if mustPrintWithKinds(objs, infos, sorter) {
 		showKind = true
@@ -339,6 +350,10 @@ func RunGet(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string
 			original = infos[ix].Object
 		}
 		if printer == nil || lastMapping == nil || mapping == nil || mapping.Resource != lastMapping.Resource {
+			if printer != nil {
+				w.Flush()
+				printer.FinishPrint(errOut, lastMapping.Resource)
+			}
 			printer, err = f.PrinterForMapping(cmd, mapping, allNamespaces)
 			if err != nil {
 				allErrs = append(allErrs, err)
@@ -375,6 +390,10 @@ func RunGet(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string
 			continue
 		}
 	}
+	w.Flush()
+	if printer != nil {
+		printer.FinishPrint(errOut, lastMapping.Resource)
+	}
 	return utilerrors.NewAggregate(allErrs)
 }
 

pkg/kubectl/cmd/get_test.go

@@ -127,8 +127,9 @@ func TestGetUnknownSchemaObject(t *testing.T) {
 	tf.Namespace = "test"
 	tf.ClientConfig = &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: testapi.Default.GroupVersion()}}
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 	cmd.Run(cmd, []string{"type", "foo"})
 
@@ -203,12 +204,13 @@ func TestGetUnknownSchemaObjectListGeneric(t *testing.T) {
 		tf.Namespace = "test"
 		tf.ClientConfig = &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: testapi.Default.GroupVersion()}}
 		buf := bytes.NewBuffer([]byte{})
-		cmd := NewCmdGet(f, buf)
+		errBuf := bytes.NewBuffer([]byte{})
+		cmd := NewCmdGet(f, buf, errBuf)
 		cmd.SetOutput(buf)
 		cmd.Flags().Set("output", "json")
 
 		cmd.Flags().Set("output-version", test.outputVersion)
-		err := RunGet(f, buf, cmd, []string{"type/foo", "replicationcontrollers/foo"}, &GetOptions{})
+		err := RunGet(f, buf, errBuf, cmd, []string{"type/foo", "replicationcontrollers/foo"}, &GetOptions{})
 		if err != nil {
 			t.Errorf("%s: unexpected error: %v", k, err)
 			continue
@@ -246,8 +248,9 @@ func TestGetSchemaObject(t *testing.T) {
 	tf.Namespace = "test"
 	tf.ClientConfig = &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: &unversioned.GroupVersion{Version: "v1"}}}
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.Run(cmd, []string{"replicationcontrollers", "foo"})
 
 	if !strings.Contains(buf.String(), "\"foo\"") {
@@ -266,8 +269,9 @@ func TestGetObjects(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 	cmd.Run(cmd, []string{"pods", "foo"})
 
@@ -312,7 +316,9 @@ func TestGetSortedObjects(t *testing.T) {
 	tf.ClientConfig = &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: &unversioned.GroupVersion{Version: "v1"}}}
 
 	buf := bytes.NewBuffer([]byte{})
-	cmd := NewCmdGet(f, buf)
+	errBuf := bytes.NewBuffer([]byte{})
+
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 
 	// sorting with metedata.name
@@ -342,8 +348,9 @@ func TestGetObjectsIdentifiedByFile(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 	cmd.Flags().Set("filename", "../../../examples/storage/cassandra/cassandra-controller.yaml")
 	cmd.Run(cmd, []string{})
@@ -369,8 +376,9 @@ func TestGetListObjects(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 	cmd.Run(cmd, []string{"pods"})
 
@@ -412,8 +420,9 @@ func TestGetAllListObjects(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 	cmd.Flags().Set("show-all", "true")
 	cmd.Run(cmd, []string{"pods"})
@@ -442,8 +451,9 @@ func TestGetListComponentStatus(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 	cmd.Run(cmd, []string{"componentstatuses"})
 
@@ -481,8 +491,9 @@ func TestGetMultipleTypeObjects(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 	cmd.Run(cmd, []string{"pods,services"})
 
@@ -521,8 +532,9 @@ func TestGetMultipleTypeObjectsAsList(t *testing.T) {
 	tf.Namespace = "test"
 	tf.ClientConfig = &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: testapi.Default.GroupVersion()}}
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 
 	cmd.Flags().Set("output", "json")
@@ -583,8 +595,9 @@ func TestGetMultipleTypeObjectsWithSelector(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 
 	cmd.Flags().Set("selector", "a=b")
@@ -632,8 +645,9 @@ func TestGetMultipleTypeObjectsWithDirectReference(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 
 	cmd.Run(cmd, []string{"services/bar", "node/foo"})
@@ -659,8 +673,9 @@ func TestGetByNameForcesFlag(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 	cmd.Run(cmd, []string{"pods", "foo"})
 
@@ -770,8 +785,9 @@ func TestWatchSelector(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 
 	cmd.Flags().Set("watch", "true")
@@ -809,8 +825,9 @@ func TestWatchResource(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 
 	cmd.Flags().Set("watch", "true")
@@ -847,7 +864,9 @@ func TestWatchResourceIdentifiedByFile(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
-	cmd := NewCmdGet(f, buf)
+	errBuf := bytes.NewBuffer([]byte{})
+
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 
 	cmd.Flags().Set("watch", "true")
@@ -886,8 +905,9 @@ func TestWatchOnlyResource(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 
 	cmd.Flags().Set("watch-only", "true")
@@ -930,8 +950,9 @@ func TestWatchOnlyList(t *testing.T) {
 	}
 	tf.Namespace = "test"
 	buf := bytes.NewBuffer([]byte{})
+	errBuf := bytes.NewBuffer([]byte{})
 
-	cmd := NewCmdGet(f, buf)
+	cmd := NewCmdGet(f, buf, errBuf)
 	cmd.SetOutput(buf)
 
 	cmd.Flags().Set("watch-only", "true")

pkg/kubectl/custom_column_printer.go

@@ -155,6 +155,10 @@ type CustomColumnsPrinter struct {
 	NoHeaders bool
 }
 
+func (s *CustomColumnsPrinter) FinishPrint(w io.Writer, res string) error {
+	return nil
+}
+
 func (s *CustomColumnsPrinter) PrintObj(obj runtime.Object, out io.Writer) error {
 	w := tabwriter.NewWriter(out, columnwidth, tabwidth, padding, padding_character, flags)
 

pkg/kubectl/resource_printer.go

@@ -146,6 +146,9 @@ type ResourcePrinter interface {
 	// Print receives a runtime object, formats it and prints it to a writer.
 	PrintObj(runtime.Object, io.Writer) error
 	HandledResources() []string
+	//Can be used to print out warning/clarifications if needed
+	//after all objects were printed
+	FinishPrint(io.Writer, string) error
 }
 
 // ResourcePrinterFunc is a function that can print objects
@@ -161,6 +164,10 @@ func (fn ResourcePrinterFunc) HandledResources() []string {
 	return []string{}
 }
 
+func (fn ResourcePrinterFunc) FinishPrint(io.Writer, string) error {
+	return nil
+}
+
 // VersionedPrinter takes runtime objects and ensures they are converted to a given API version
 // prior to being passed to a nested printer.
 type VersionedPrinter struct {
@@ -178,6 +185,10 @@ func NewVersionedPrinter(printer ResourcePrinter, converter runtime.ObjectConver
 	}
 }
 
+func (p *VersionedPrinter) FinishPrint(w io.Writer, res string) error {
+	return nil
+}
+
 // PrintObj implements ResourcePrinter
 func (p *VersionedPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
 	if len(p.versions) == 0 {
@@ -210,6 +221,10 @@ type NamePrinter struct {
 	Typer   runtime.ObjectTyper
 }
 
+func (p *NamePrinter) FinishPrint(w io.Writer, res string) error {
+	return nil
+}
+
 // PrintObj is an implementation of ResourcePrinter.PrintObj which decodes the object
 // and print "resource/name" pair. If the object is a List, print all items in it.
 func (p *NamePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
@@ -258,6 +273,10 @@ func (p *NamePrinter) HandledResources() []string {
 type JSONPrinter struct {
 }
 
+func (p *JSONPrinter) FinishPrint(w io.Writer, res string) error {
+	return nil
+}
+
 // PrintObj is an implementation of ResourcePrinter.PrintObj which simply writes the object to the Writer.
 func (p *JSONPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
 	switch obj := obj.(type) {
@@ -290,6 +309,10 @@ type YAMLPrinter struct {
 	converter runtime.ObjectConvertor
 }
 
+func (p *YAMLPrinter) FinishPrint(w io.Writer, res string) error {
+	return nil
+}
+
 // PrintObj prints the data as YAML.
 func (p *YAMLPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
 	switch obj := obj.(type) {
@@ -318,6 +341,7 @@ func (p *YAMLPrinter) HandledResources() []string {
 type handlerEntry struct {
 	columns   []string
 	printFunc reflect.Value
+	args      []reflect.Value
 }
 
 type PrintOptions struct {
@@ -337,9 +361,10 @@ type PrintOptions struct {
 // will only be printed if the object type changes. This makes it useful for printing items
 // received from watches.
 type HumanReadablePrinter struct {
-	handlerMap map[reflect.Type]*handlerEntry
+	handlerMap   map[reflect.Type]*handlerEntry
-	options    PrintOptions
+	options      PrintOptions
-	lastType   reflect.Type
+	lastType     reflect.Type
+	hiddenObjNum int
 }
 
 // NewHumanReadablePrinter creates a HumanReadablePrinter.
@@ -383,6 +408,7 @@ func (h *HumanReadablePrinter) Handler(columns []string, printFunc interface{})
 		glog.Errorf("Unable to add print handler: %v", err)
 		return err
 	}
+
 	objType := printFuncValue.Type().In(0)
 	h.handlerMap[objType] = &handlerEntry{
 		columns:   columns,
@@ -430,6 +456,14 @@ func (h *HumanReadablePrinter) HandledResources() []string {
 	return keys
 }
 
+func (h *HumanReadablePrinter) FinishPrint(output io.Writer, res string) error {
+	if !h.options.NoHeaders && !h.options.ShowAll && h.hiddenObjNum > 0 {
+		_, err := fmt.Fprintf(output, "  info: %d completed object(s) was(were) not shown in %s list. Pass --show-all to see all objects.\n\n", h.hiddenObjNum, res)
+		return err
+	}
+	return nil
+}
+
 // NOTE: When adding a new resource type here, please update the list
 // pkg/kubectl/cmd/get.go to reflect the new resource type.
 var podColumns = []string{"NAME", "READY", "STATUS", "RESTARTS", "AGE"}
@@ -469,10 +503,40 @@ var podSecurityPolicyColumns = []string{"NAME", "PRIV", "CAPS", "VOLUMEPLUGINS",
 var clusterColumns = []string{"NAME", "STATUS", "VERSION", "AGE"}
 var networkPolicyColumns = []string{"NAME", "POD-SELECTOR", "AGE"}
 
+func (h *HumanReadablePrinter) printPod(pod *api.Pod, w io.Writer, options PrintOptions) error {
+	reason := string(pod.Status.Phase)
+	// if not printing all pods, skip terminated pods (default)
+	if !options.ShowAll && (reason == string(api.PodSucceeded) || reason == string(api.PodFailed)) {
+		h.hiddenObjNum++
+		return nil
+	}
+	if err := printPodBase(pod, w, options); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (h *HumanReadablePrinter) printPodList(podList *api.PodList, w io.Writer, options PrintOptions) error {
+	for _, pod := range podList.Items {
+		reason := string(pod.Status.Phase)
+		// if not printing all pods, skip terminated pods (default)
+		if !options.ShowAll && (reason == string(api.PodSucceeded) || reason == string(api.PodFailed)) {
+			h.hiddenObjNum++
+			continue
+		}
+
+		if err := printPodBase(&pod, w, options); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 // addDefaultHandlers adds print handlers for default Kubernetes types.
 func (h *HumanReadablePrinter) addDefaultHandlers() {
-	h.Handler(podColumns, printPod)
+	h.Handler(podColumns, h.printPodList)
-	h.Handler(podColumns, printPodList)
+	h.Handler(podColumns, h.printPod)
 	h.Handler(podTemplateColumns, printPodTemplate)
 	h.Handler(podTemplateColumns, printPodTemplateList)
 	h.Handler(replicationControllerColumns, printReplicationController)
@@ -613,10 +677,6 @@ func translateTimestamp(timestamp unversioned.Time) string {
 	return shortHumanDuration(time.Now().Sub(timestamp.Time))
 }
 
-func printPod(pod *api.Pod, w io.Writer, options PrintOptions) error {
-	return printPodBase(pod, w, options)
-}
-
 func printPodBase(pod *api.Pod, w io.Writer, options PrintOptions) error {
 	name := formatResourceName(options.Kind, pod.Name, options.WithKind)
 	namespace := pod.Namespace
@@ -626,10 +686,6 @@ func printPodBase(pod *api.Pod, w io.Writer, options PrintOptions) error {
 	readyContainers := 0
 
 	reason := string(pod.Status.Phase)
-	// if not printing all pods, skip terminated pods (default)
-	if !options.ShowAll && (reason == string(api.PodSucceeded) || reason == string(api.PodFailed)) {
-		return nil
-	}
 	if pod.Status.Reason != "" {
 		reason = pod.Status.Reason
 	}
@@ -727,15 +783,6 @@ func printPodBase(pod *api.Pod, w io.Writer, options PrintOptions) error {
 	return nil
 }
 
-func printPodList(podList *api.PodList, w io.Writer, options PrintOptions) error {
-	for _, pod := range podList.Items {
-		if err := printPodBase(&pod, w, options); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
 func printPodTemplate(pod *api.PodTemplate, w io.Writer, options PrintOptions) error {
 	name := formatResourceName(options.Kind, pod.Name, options.WithKind)
 
@@ -2118,6 +2165,10 @@ func NewTemplatePrinter(tmpl []byte) (*TemplatePrinter, error) {
 	}, nil
 }
 
+func (p *TemplatePrinter) FinishPrint(w io.Writer, res string) error {
+	return nil
+}
+
 // PrintObj formats the obj with the Go Template.
 func (p *TemplatePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
 	data, err := json.Marshal(obj)
@@ -2265,6 +2316,10 @@ func NewJSONPathPrinter(tmpl string) (*JSONPathPrinter, error) {
 	return &JSONPathPrinter{tmpl, j}, nil
 }
 
+func (j *JSONPathPrinter) FinishPrint(w io.Writer, res string) error {
+	return nil
+}
+
 // PrintObj formats the obj with the JSONPath Template.
 func (j *JSONPathPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
 	var queryObj interface{} = obj

pkg/kubectl/resource_printer_test.go

@@ -1148,14 +1148,18 @@ func TestPrintPod(t *testing.T) {
 	}
 
 	buf := bytes.NewBuffer([]byte{})
+	printer := HumanReadablePrinter{hiddenObjNum: 0}
 	for _, test := range tests {
-		printPod(&test.pod, buf, PrintOptions{false, false, false, false, true, false, false, "", []string{}})
+		printer.printPod(&test.pod, buf, PrintOptions{false, false, false, false, true, false, false, "", []string{}})
 		// We ignore time
 		if !strings.HasPrefix(buf.String(), test.expect) {
 			t.Fatalf("Expected: %s, got: %s", test.expect, buf.String())
 		}
 		buf.Reset()
 	}
+	if printer.hiddenObjNum > 0 {
+		t.Fatalf("Expected hidden pods: 0, got: %d", printer.hiddenObjNum)
+	}
 }
 
 func TestPrintNonTerminatedPod(t *testing.T) {
@@ -1241,14 +1245,18 @@ func TestPrintNonTerminatedPod(t *testing.T) {
 	}
 
 	buf := bytes.NewBuffer([]byte{})
+	printer := HumanReadablePrinter{hiddenObjNum: 0}
 	for _, test := range tests {
-		printPod(&test.pod, buf, PrintOptions{false, false, false, false, false, false, false, "", []string{}})
+		printer.printPod(&test.pod, buf, PrintOptions{false, false, false, false, false, false, false, "", []string{}})
 		// We ignore time
 		if !strings.HasPrefix(buf.String(), test.expect) {
 			t.Fatalf("Expected: %s, got: %s", test.expect, buf.String())
 		}
 		buf.Reset()
 	}
+	if printer.hiddenObjNum != 2 {
+		t.Fatalf("Expected hidden pods: 2, got: %d", printer.hiddenObjNum)
+	}
 }
 
 func TestPrintPodWithLabels(t *testing.T) {
@@ -1301,14 +1309,18 @@ func TestPrintPodWithLabels(t *testing.T) {
 	}
 
 	buf := bytes.NewBuffer([]byte{})
+	printer := HumanReadablePrinter{hiddenObjNum: 0}
 	for _, test := range tests {
-		printPod(&test.pod, buf, PrintOptions{false, false, false, false, false, false, false, "", test.labelColumns})
+		printer.printPod(&test.pod, buf, PrintOptions{false, false, false, false, false, false, false, "", test.labelColumns})
 		// We ignore time
 		if !strings.HasPrefix(buf.String(), test.startsWith) || !strings.HasSuffix(buf.String(), test.endsWith) {
 			t.Fatalf("Expected to start with: %s and end with: %s, but got: %s", test.startsWith, test.endsWith, buf.String())
 		}
 		buf.Reset()
 	}
+	if printer.hiddenObjNum > 0 {
+		t.Fatalf("Expected hidden pods: 0, got: %d", printer.hiddenObjNum)
+	}
 }
 
 type stringTestList []struct {
@@ -1507,12 +1519,17 @@ func TestPrintPodShowLabels(t *testing.T) {
 	}
 
 	buf := bytes.NewBuffer([]byte{})
+	printer := HumanReadablePrinter{hiddenObjNum: 0}
+
 	for _, test := range tests {
-		printPod(&test.pod, buf, PrintOptions{false, false, false, false, false, test.showLabels, false, "", []string{}})
+		printer.printPod(&test.pod, buf, PrintOptions{false, false, false, false, false, test.showLabels, false, "", []string{}})
 		// We ignore time
 		if !strings.HasPrefix(buf.String(), test.startsWith) || !strings.HasSuffix(buf.String(), test.endsWith) {
 			t.Fatalf("Expected to start with: %s and end with: %s, but got: %s", test.startsWith, test.endsWith, buf.String())
 		}
 		buf.Reset()
 	}
+	if printer.hiddenObjNum > 0 {
+		t.Fatalf("Expected hidden pods: 0, got: %d", printer.hiddenObjNum)
+	}
 }

pkg/kubectl/sorting_printer.go

@@ -40,6 +40,10 @@ type SortingPrinter struct {
 	Decoder   runtime.Decoder
 }
 
+func (s *SortingPrinter) FinishPrint(w io.Writer, res string) error {
+	return nil
+}
+
 func (s *SortingPrinter) PrintObj(obj runtime.Object, out io.Writer) error {
 	if !meta.IsListType(obj) {
 		return s.Delegate.PrintObj(obj, out)