Get printer from factory to retrieve handled resources

contrib/completions/bash/kubectl

@@ -848,6 +848,7 @@ _kubectl_label()
     must_have_one_noun+=("secret")
     must_have_one_noun+=("service")
     must_have_one_noun+=("serviceaccount")
+    must_have_one_noun+=("thirdpartyresource")
 }
 
 _kubectl_annotate()

pkg/kubectl/cmd/cmd_test.go

@@ -112,6 +112,11 @@ func (t *testPrinter) PrintObj(obj runtime.Object, out io.Writer) error {
 	return t.Err
 }
 
+// TODO: implement HandledResources()
+func (t *testPrinter) HandledResources() []string {
+	return []string{}
+}
+
 type testDescriber struct {
 	Name, Namespace string
 	Output          string

pkg/kubectl/cmd/label.go

@@ -64,8 +64,12 @@ $ kubectl label pods foo bar-`
 
 func NewCmdLabel(f *cmdutil.Factory, out io.Writer) *cobra.Command {
 	options := &LabelOptions{}
-	p := kubectl.NewHumanReadablePrinter(false, false, false, false, []string{})
-	validArgs := p.HandledResources()
+	validArgs := []string{}
+	p, err := f.Printer(nil, false, false, false, false, []string{})
+	cmdutil.CheckErr(err)
+	if p != nil {
+		validArgs = p.HandledResources()
+	}
 
 	cmd := &cobra.Command{
 		Use:     "label [--overwrite] (-f FILENAME | TYPE NAME) KEY_1=VAL_1 ... KEY_N=VAL_N [--resource-version=version]",

pkg/kubectl/resource_printer.go

@@ -101,6 +101,7 @@ func GetPrinter(format, formatArgument string) (ResourcePrinter, bool, error) {
 type ResourcePrinter interface {
 	// Print receives a runtime object, formats it and prints it to a writer.
 	PrintObj(runtime.Object, io.Writer) error
+	HandledResources() []string
 }
 
 // ResourcePrinterFunc is a function that can print objects
@@ -111,6 +112,11 @@ func (fn ResourcePrinterFunc) PrintObj(obj runtime.Object, w io.Writer) error {
 	return fn(obj, w)
 }
 
+// TODO: implement HandledResources()
+func (fn ResourcePrinterFunc) HandledResources() []string {
+	return []string{}
+}
+
 // 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 {
@@ -149,6 +155,11 @@ func (p *VersionedPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
 	return fmt.Errorf("the object cannot be converted to any of the versions: %v", p.version)
 }
 
+// TODO: implement HandledResources()
+func (p *VersionedPrinter) HandledResources() []string {
+	return []string{}
+}
+
 // NamePrinter is an implementation of ResourcePrinter which outputs "resource/name" pair of an object.
 type NamePrinter struct {
 }
@@ -199,6 +210,11 @@ func (p *NamePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
 	return nil
 }
 
+// TODO: implement HandledResources()
+func (p *NamePrinter) HandledResources() []string {
+	return []string{}
+}
+
 // JSONPrinter is an implementation of ResourcePrinter which outputs an object as JSON.
 type JSONPrinter struct {
 }
@@ -216,6 +232,11 @@ func (p *JSONPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
 	return err
 }
 
+// TODO: implement HandledResources()
+func (p *JSONPrinter) HandledResources() []string {
+	return []string{}
+}
+
 // YAMLPrinter is an implementation of ResourcePrinter which outputs an object as YAML.
 // The input object is assumed to be in the internal version of an API and is converted
 // to the given version first.
@@ -234,6 +255,11 @@ func (p *YAMLPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
 	return err
 }
 
+// TODO: implement HandledResources()
+func (p *YAMLPrinter) HandledResources() []string {
+	return []string{}
+}
+
 type handlerEntry struct {
 	columns   []string
 	printFunc reflect.Value
@@ -1214,6 +1240,11 @@ func (p *TemplatePrinter) PrintObj(obj runtime.Object, w io.Writer) error {
 	return nil
 }
 
+// TODO: implement HandledResources()
+func (p *TemplatePrinter) HandledResources() []string {
+	return []string{}
+}
+
 // safeExecute tries to execute the template, but catches panics and returns an error
 // should the template engine panic.
 func (p *TemplatePrinter) safeExecute(w io.Writer, obj interface{}) error {
@@ -1352,3 +1383,8 @@ func (j *JSONPathPrinter) PrintObj(obj runtime.Object, w io.Writer) error {
 	}
 	return nil
 }
+
+// TODO: implement HandledResources()
+func (p *JSONPathPrinter) HandledResources() []string {
+	return []string{}
+}

pkg/kubectl/sorting_printer.go

@@ -46,6 +46,11 @@ func (s *SortingPrinter) PrintObj(obj runtime.Object, out io.Writer) error {
 	return s.Delegate.PrintObj(obj, out)
 }
 
+// TODO: implement HandledResources()
+func (p *SortingPrinter) HandledResources() []string {
+	return []string{}
+}
+
 func (s *SortingPrinter) sortObj(obj runtime.Object) error {
 	objs, err := runtime.ExtractList(obj)
 	if err != nil {