) ([]string, cobra.ShellCompDirective) {
		return completion.ValidNamespaceArgs(cmd, ctx, args, toComplete)
	})
	_ = rootCmd.RegisterFlagCompletionFunc(cli.FlagNamespace, func(
		cmd *cobra.Command, args []string, toComplete string,
	) ([]string, cobra.ShellCompDirective) {
		return completion.ValidNamespaceArgs(cmd, ctx, args, toComplete)
	})

	// Attach the Istio logging options to the command.

	nslist, err := client.Kube().CoreV1().Namespaces().List(ctx, metav1.ListOptions{})
	if err != nil {
		return []corev1.Namespace{}, err
	}
	return nslist.Items, nil
}

func ValidNamespaceArgs(_ *cobra.Command, ctx cli.Context, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
	if len(args) != 0 {
		return nil, cobra.ShellCompDirectiveNoFileComp
	}
	client, err := ctx.CLIClient()