Esempio n. 1
0
// Help renders i's content, along with documentation for any
// flags defined in f. It calls f.SetOutput(ioutil.Discard).
func (i *Info) Help(f *gnuflag.FlagSet) []byte {
	buf := &bytes.Buffer{}
	fmt.Fprintf(buf, "usage: %s", i.Name)
	hasOptions := false
	f.VisitAll(func(f *gnuflag.Flag) { hasOptions = true })
	if hasOptions {
		fmt.Fprintf(buf, " [options]")
	}
	if i.Args != "" {
		fmt.Fprintf(buf, " %s", i.Args)
	}
	fmt.Fprintf(buf, "\n")
	if i.Purpose != "" {
		fmt.Fprintf(buf, "purpose: %s\n", i.Purpose)
	}
	if hasOptions {
		fmt.Fprintf(buf, "\noptions:\n")
		f.SetOutput(buf)
		f.PrintDefaults()
	}
	f.SetOutput(ioutil.Discard)
	if i.Doc != "" {
		fmt.Fprintf(buf, "\n%s\n", strings.TrimSpace(i.Doc))
	}
	if len(i.Aliases) > 0 {
		fmt.Fprintf(buf, "\naliases: %s\n", strings.Join(i.Aliases, ", "))
	}
	return buf.Bytes()
}
Esempio n. 2
0
// SetCommonFlags creates a new "commonflags" flagset, whose
// flags are shared with the argument f; this enables us to
// add non-global flags to f, which do not carry into subcommands.
func (c *SuperCommand) SetCommonFlags(f *gnuflag.FlagSet) {
	if c.Log != nil {
		c.Log.AddFlags(f)
	}
	f.BoolVar(&c.showHelp, "h", false, helpPurpose)
	f.BoolVar(&c.showHelp, "help", false, "")
	// In the case where we are providing the basis for a plugin,
	// plugins are required to support the --description argument.
	// The Purpose attribute will be printed (if defined), allowing
	// plugins to provide a sensible line of text for 'juju help plugins'.
	f.BoolVar(&c.showDescription, "description", false, "")
	c.commonflags = gnuflag.NewFlagSet(c.Info().Name, gnuflag.ContinueOnError)
	c.commonflags.SetOutput(ioutil.Discard)
	f.VisitAll(func(flag *gnuflag.Flag) {
		c.commonflags.Var(flag.Value, flag.Name, flag.Usage)
	})
}
Esempio n. 3
0
func MergeFlagSet(fs1, fs2 *gnuflag.FlagSet) *gnuflag.FlagSet {
	fs2.VisitAll(func(flag *gnuflag.Flag) {
		fs1.Var(flag.Value, flag.Name, flag.Usage)
	})
	return fs1
}