Fix panic in kubectl rollout commands

pkg/kubectl/cmd/rollout/rollout_history.go

@@ -81,6 +81,7 @@ func NewCmdRolloutHistory(f cmdutil.Factory, streams genericclioptions.IOStreams
 		Example: history_example,
 		Run: func(cmd *cobra.Command, args []string) {
 			cmdutil.CheckErr(o.Complete(f, cmd, args))
+			cmdutil.CheckErr(o.Validate())
 			cmdutil.CheckErr(o.Run())
 		},
 		ValidArgs: validArgs,
@@ -118,7 +119,7 @@ func (o *RolloutHistoryOptions) Complete(f cmdutil.Factory, cmd *cobra.Command,
 
 func (o *RolloutHistoryOptions) Validate() error {
 	if len(o.Resources) == 0 && cmdutil.IsFilenameSliceEmpty(o.Filenames) {
-		return fmt.Errorf("Required resource not specified.")
+		return fmt.Errorf("required resource not specified")
 	}
 	if o.Revision < 0 {
 		return fmt.Errorf("revision must be a positive integer: %v", o.Revision)

pkg/kubectl/cmd/rollout/rollout_pause.go

@@ -35,9 +35,9 @@ import (
 	"k8s.io/kubernetes/pkg/kubectl/util/i18n"
 )
 
-// PauseConfig is the start of the data required to perform the operation.  As new fields are added, add them here instead of
+// PauseOptions is the start of the data required to perform the operation.  As new fields are added, add them here instead of
 // referencing the cmd.Flags()
-type PauseConfig struct {
+type PauseOptions struct {
 	PrintFlags *genericclioptions.PrintFlags
 	ToPrinter  func(string) (printers.ResourcePrinter, error)
 
@@ -67,7 +67,7 @@ var (
 )
 
 func NewCmdRolloutPause(f cmdutil.Factory, streams genericclioptions.IOStreams) *cobra.Command {
-	o := &PauseConfig{
+	o := &PauseOptions{
 		PrintFlags: genericclioptions.NewPrintFlags("paused").WithTypeSetter(scheme.Scheme),
 		IOStreams:  streams,
 	}
@@ -82,6 +82,7 @@ func NewCmdRolloutPause(f cmdutil.Factory, streams genericclioptions.IOStreams)
 		Example: pause_example,
 		Run: func(cmd *cobra.Command, args []string) {
 			cmdutil.CheckErr(o.Complete(f, cmd, args))
+			cmdutil.CheckErr(o.Validate())
 			cmdutil.CheckErr(o.RunPause())
 		},
 		ValidArgs: validArgs,
@@ -94,15 +95,12 @@ func NewCmdRolloutPause(f cmdutil.Factory, streams genericclioptions.IOStreams)
 	return cmd
 }
 
-func (o *PauseConfig) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
-	if len(args) == 0 && cmdutil.IsFilenameSliceEmpty(o.Filenames) {
-		return cmdutil.UsageErrorf(cmd, "%s", cmd.Use)
-	}
-
+func (o *PauseOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
 	o.Pauser = polymorphichelpers.ObjectPauserFn
 
 	var err error
-	if o.Namespace, o.EnforceNamespace, err = f.ToRawKubeConfigLoader().Namespace(); err != nil {
+	o.Namespace, o.EnforceNamespace, err = f.ToRawKubeConfigLoader().Namespace()
+	if err != nil {
 		return err
 	}
 
@@ -117,7 +115,14 @@ func (o *PauseConfig) Complete(f cmdutil.Factory, cmd *cobra.Command, args []str
 	return nil
 }
 
-func (o PauseConfig) RunPause() error {
+func (o *PauseOptions) Validate() error {
+	if len(o.Resources) == 0 && cmdutil.IsFilenameSliceEmpty(o.Filenames) {
+		return fmt.Errorf("required resource not specified")
+	}
+	return nil
+}
+
+func (o PauseOptions) RunPause() error {
 	r := o.Builder().
 		WithScheme(legacyscheme.Scheme).
 		NamespaceParam(o.Namespace).DefaultNamespace().

pkg/kubectl/cmd/rollout/rollout_resume.go

@@ -85,6 +85,7 @@ func NewCmdRolloutResume(f cmdutil.Factory, streams genericclioptions.IOStreams)
 		Example: resume_example,
 		Run: func(cmd *cobra.Command, args []string) {
 			cmdutil.CheckErr(o.Complete(f, cmd, args))
+			cmdutil.CheckErr(o.Validate())
 			cmdutil.CheckErr(o.RunResume())
 		},
 		ValidArgs: validArgs,
@@ -97,10 +98,6 @@ func NewCmdRolloutResume(f cmdutil.Factory, streams genericclioptions.IOStreams)
 }
 
 func (o *ResumeOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
-	if len(args) == 0 && cmdutil.IsFilenameSliceEmpty(o.Filenames) {
-		return cmdutil.UsageErrorf(cmd, "%s", cmd.Use)
-	}
-
 	o.Resources = args
 
 	o.Resumer = polymorphichelpers.ObjectResumerFn
@@ -121,6 +118,13 @@ func (o *ResumeOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []s
 	return nil
 }
 
+func (o *ResumeOptions) Validate() error {
+	if len(o.Resources) == 0 && cmdutil.IsFilenameSliceEmpty(o.Filenames) {
+		return fmt.Errorf("required resource not specified")
+	}
+	return nil
+}
+
 func (o ResumeOptions) RunResume() error {
 	r := o.Builder().
 		WithScheme(legacyscheme.Scheme).

pkg/kubectl/cmd/rollout/rollout_status.go

@@ -102,7 +102,7 @@ func NewCmdRolloutStatus(f cmdutil.Factory, streams genericclioptions.IOStreams)
 		Example: status_example,
 		Run: func(cmd *cobra.Command, args []string) {
 			cmdutil.CheckErr(o.Complete(f, args))
-			cmdutil.CheckErr(o.Validate(cmd, args))
+			cmdutil.CheckErr(o.Validate())
 			cmdutil.CheckErr(o.Run())
 		},
 		ValidArgs: validArgs,
@@ -144,9 +144,9 @@ func (o *RolloutStatusOptions) Complete(f cmdutil.Factory, args []string) error
 	return nil
 }
 
-func (o *RolloutStatusOptions) Validate(cmd *cobra.Command, args []string) error {
-	if len(args) == 0 && cmdutil.IsFilenameSliceEmpty(o.FilenameOptions.Filenames) {
-		return cmdutil.UsageErrorf(cmd, "Required resource not specified.")
+func (o *RolloutStatusOptions) Validate() error {
+	if len(o.BuilderArgs) == 0 && cmdutil.IsFilenameSliceEmpty(o.FilenameOptions.Filenames) {
+		return fmt.Errorf("required resource not specified")
 	}
 
 	if o.Revision < 0 {

pkg/kubectl/cmd/rollout/rollout_undo.go

@@ -17,6 +17,8 @@ limitations under the License.
 package rollout
 
 import (
+	"fmt"
+
 	"github.com/spf13/cobra"
 	"k8s.io/kubernetes/pkg/kubectl/polymorphichelpers"
 
@@ -84,6 +86,7 @@ func NewCmdRolloutUndo(f cmdutil.Factory, streams genericclioptions.IOStreams) *
 		Example: undo_example,
 		Run: func(cmd *cobra.Command, args []string) {
 			cmdutil.CheckErr(o.Complete(f, cmd, args))
+			cmdutil.CheckErr(o.Validate())
 			cmdutil.CheckErr(o.RunUndo())
 		},
 		ValidArgs: validArgs,
@@ -98,10 +101,6 @@ func NewCmdRolloutUndo(f cmdutil.Factory, streams genericclioptions.IOStreams) *
 }
 
 func (o *UndoOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
-	if len(args) == 0 && cmdutil.IsFilenameSliceEmpty(o.Filenames) {
-		return cmdutil.UsageErrorf(cmd, "Required resource not specified.")
-	}
-
 	o.Resources = args
 	o.DryRun = cmdutil.GetDryRunFlag(cmd)
 
@@ -124,6 +123,13 @@ func (o *UndoOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []str
 	return err
 }
 
+func (o *UndoOptions) Validate() error {
+	if len(o.Resources) == 0 && cmdutil.IsFilenameSliceEmpty(o.Filenames) {
+		return fmt.Errorf("required resource not specified")
+	}
+	return nil
+}
+
 func (o *UndoOptions) RunUndo() error {
 	r := o.Builder().
 		WithScheme(legacyscheme.Scheme).