Beispiel #1
0
func (cmd *Command) PrintHelp(w io.Writer) {
	wrap := wrapper.New()
	wrap.FirstIndent = "  "
	wrap.DefaultIndent = wrap.FirstIndent

	// Command name with brief and synopsis
	pathStr := strings.Join(cmd.path, " ")
	fmt.Fprintf(w, "\n%s - %s\n\n", pathStr, cmd.Brief)
	fmt.Fprintf(w, "Usage: %s %s\n\n", pathStr, cmd.Synopsis)

	// Description
	descr := strings.Join(wrap.Wrap(cmd.Description), "\n")
	fmt.Fprintf(w, "Description:\n%s\n", descr)

	// Options
	hdrPrint := false
	tw := tabwriter.NewWriter(os.Stdout, 8, 0, 2, ' ', tabwriter.AlignRight)
	cmd.Flags.VisitAll(func(flag *flag.Flag) {
		if !hdrPrint {
			fmt.Fprintf(w, "\nOptions:\n")
			hdrPrint = true
		}

		def := ""
		if len(flag.DefValue) > 0 {
			def = fmt.Sprintf("(default %q)", flag.DefValue)
		}
		fmt.Fprintf(tw, "-%s\t%s%s\t\n", flag.Name, flag.Usage, def)
	})
	tw.Flush()
}
Beispiel #2
0
func (grp *Group) PrintHelp(w io.Writer) {
	wrap := wrapper.New()
	wrap.FirstIndent = "  "
	wrap.DefaultIndent = wrap.FirstIndent

	// Brief, with an optional path to the group name
	if len(grp.path) > 0 {
		fmt.Fprintf(w, "\n%s - %s\n\n", strings.Join(grp.path, " "), grp.Brief)
	} else {
		fmt.Fprintf(w, "\n%s\n\n", grp.Brief)
	}

	// Description
	descr := strings.Join(wrap.Wrap(grp.Description), "\n")
	fmt.Fprintf(w, "Description:\n%s\n\n", descr)

	// Print available subgroups
	fmt.Fprintf(w, "Available subgroups:\n")
	for k, v := range grp.subgroup {
		fmt.Fprintf(w, "    %-14s %s\n", k, v.Summary())
	}
}