update kubectl subcommand with -k changes

pkg/kubectl/cmd/get/get.go

@@ -115,6 +115,9 @@ var (
 		# List a pod identified by type and name specified in "pod.yaml" in JSON output format.
 		kubectl get -f pod.yaml -o json
 
+		# List resources from a directory with kustomization.yaml - e.g. dir/kustomization.yaml.
+		kubectl get -k dir/
+
 		# Return only the phase value of the specified pod.
 		kubectl get -o template pod/web-pod-13je7 --template={{.status.phase}}
 
@@ -257,7 +260,7 @@ func (o *GetOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []stri
 	switch {
 	case o.Watch || o.WatchOnly:
 	default:
-		if len(args) == 0 && cmdutil.IsFilenameSliceEmpty(o.Filenames) {
+		if len(args) == 0 && cmdutil.IsFilenameSliceEmpty(o.Filenames, o.Kustomize) {
 			fmt.Fprintf(o.ErrOut, "You must specify the type of resource to get. %s\n\n", cmdutil.SuggestAPIResources(o.CmdParent))
 			fullCmdName := cmd.Parent().CommandPath()
 			usageString := "Required resource not specified."