Function setFlagErrorFunc

cmd/docker/docker.go:195–207

(dockerCli command.Cli, cmd *cobra.Command)

}

func setFlagErrorFunc(dockerCli command.Cli, cmd *cobra.Command) {
	// When invoking `docker stack --nonsense`, we need to make sure FlagErrorFunc return appropriate
	// output if the feature is not supported.
	// As above cli.SetupRootCommand(cmd) have already setup the FlagErrorFunc, we will add a pre-check before the FlagErrorFunc
	// is called.
	flagErrorFunc := cmd.FlagErrorFunc()
	cmd.SetFlagErrorFunc(func(cmd *cobra.Command, err error) error {
		if err := isSupported(cmd, dockerCli); err != nil {
			return err
		}
		return flagErrorFunc(cmd, err)
	})
}

func setupHelpCommand(dockerCli command.Cli, rootCmd, helpCmd *cobra.Command) {
	origRun := helpCmd.Run