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()
}
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())
}
}