allow kubectl cmd to process dirs recursively

reqs:
    - the kubectl cmd must support the -f | --filename flag
    - the kubectl cmd must support visiting a dir one level deep,
    or using more than one resource

pkg/kubectl/cmd/delete.go

@@ -35,6 +35,7 @@ import (
 // referencing the cmd.Flags()
 type DeleteOptions struct {
 	Filenames []string
+	Recursive bool
 }
 
 const (
@@ -91,6 +92,7 @@ func NewCmdDelete(f *cmdutil.Factory, out io.Writer) *cobra.Command {
 	}
 	usage := "Filename, directory, or URL to a file containing the resource to delete."
 	kubectl.AddJsonFilenameFlag(cmd, &options.Filenames, usage)
+	cmdutil.AddRecursiveFlag(cmd, &options.Recursive)
 	cmd.Flags().StringP("selector", "l", "", "Selector (label query) to filter on.")
 	cmd.Flags().Bool("all", false, "[-all] to select all the specified resources.")
 	cmd.Flags().Bool("ignore-not-found", false, "Treat \"resource not found\" as a successful delete. Defaults to \"true\" when --all is specified.")
@@ -111,7 +113,7 @@ func RunDelete(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []str
 	r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
 		ContinueOnError().
 		NamespaceParam(cmdNamespace).DefaultNamespace().
-		FilenameParam(enforceNamespace, options.Filenames...).
+		FilenameParam(enforceNamespace, options.Recursive, options.Filenames...).
 		SelectorParam(cmdutil.GetFlagString(cmd, "selector")).
 		SelectAllParam(deleteAll).
 		ResourceTypeOrNameArgs(false, args...).RequireObject(false).