Exemple #1
0
// CmdHelp displays information on a Get3W command.
//
// If more than one command is specified, information is only shown for the first command.
//
// Usage: get3w help COMMAND or get3w COMMAND --help
func (cli *Cli) CmdHelp(args ...string) error {
	if len(args) > 1 {
		command, err := cli.command(args[:2]...)
		switch err := err.(type) {
		case nil:
			command("--help")
			return nil
		case initErr:
			return err.error
		}
	}
	if len(args) > 0 {
		command, err := cli.command(args[0])
		switch err := err.(type) {
		case nil:
			command("--help")
			return nil
		case initErr:
			return err.error
		}
		cli.noSuchCommand(args[0])
	}

	if cli.Usage == nil {
		flag.Usage()
	} else {
		cli.Usage()
	}

	return nil
}
Exemple #2
0
func main() {
	// Set terminal emulation based on platform as required.
	stdin, stdout, stderr := term.StdStreams()

	logrus.SetOutput(stderr)

	flag.Merge(flag.CommandLine, clientFlags.FlagSet, commonFlags.FlagSet)

	flag.Usage = func() {
		fmt.Fprint(os.Stdout, "Usage: get3w [OPTIONS] COMMAND [arg...]\n       www [ --help | -v | --version ]\n\n")
		fmt.Fprint(os.Stdout, "A self-sufficient runtime for containers.\n\nOptions:\n")

		flag.CommandLine.SetOutput(os.Stdout)
		flag.PrintDefaults()

		help := "\nCommands:\n"

		for _, cmd := range get3wCommands {
			help += fmt.Sprintf("    %-10.10s%s\n", cmd.Name, cmd.Description)
		}

		help += "\nRun 'get3w COMMAND --help' for more information on a command."
		fmt.Fprintf(os.Stdout, "%s\n", help)
	}

	flag.Parse()

	if *flVersion {
		showVersion()
		return
	}

	if *flHelp {
		// if global flag --help is present, regardless of what other options and commands there are,
		// just print the usage.
		flag.Usage()
		return
	}

	if *flServer {
		server.Run()
		return
	}

	// TODO: remove once `-d` is retired

	clientCli := client.NewGet3WCli(stdin, stdout, stderr, clientFlags)

	c := cli.New(clientCli)
	if err := c.Run(flag.Args()...); err != nil {
		if sterr, ok := err.(cli.StatusError); ok {
			if sterr.Status != "" {
				fmt.Fprintln(os.Stderr, sterr.Status)
				os.Exit(1)
			}
			os.Exit(sterr.StatusCode)
		}
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
}