low hanging fruit for using cobra commands

pkg/kubectl/cmd/cmd.go

@@ -19,6 +19,7 @@ package cmd
 import (
 	"fmt"
 	"io"
+	"os"
 
 	"k8s.io/apiserver/pkg/util/flag"
 	"k8s.io/client-go/tools/clientcmd"
@@ -212,6 +213,10 @@ var (
 	}
 )
 
+func NewDefaultKubectlCommand() *cobra.Command {
+	return NewKubectlCommand(cmdutil.NewFactory(nil), os.Stdin, os.Stdout, os.Stderr)
+}
+
 // NewKubectlCommand creates the `kubectl` command and its nested children.
 func NewKubectlCommand(f cmdutil.Factory, in io.Reader, out, err io.Writer) *cobra.Command {
 	// Parent command to which all subcommands are added.