Ejemplo n.º 1
0
// runs here
func runFlag(x *xEnv, argv ...string) error {
	c := app.AppCtx()
	app.Dprintf("flag %v\n", argv)
	switch len(argv) {
	case 1:
		flgs := ""
		if c.Debug {
			flgs += "D"
		}
		if x.debugX {
			flgs += "X"
		}
		if x.debugL {
			flgs += "L"
		}
		if x.iflag {
			flgs += "i"
		}
		app.Printf("flags %s\n", flgs)
		return nil
	case 2:
	default:
		app.Eprintf("usage: flags [±]flags\n")
		return dbg.ErrUsage
	}
	flg := argv[1]
	set := flg[0] == '+'
	clear := flg[0] != '-'
	if !set && !clear {
		// clear all flags
		c.Debug = false
		x.debugX = false
		x.debugL = false
		// then set those named
		set = true
	} else {
		flg = flg[1:]
	}
	for _, r := range flg {
		switch r {
		case 'D':
			c.Debug = (c.Debug && !clear) || set
		case 'X':
			x.debugX = (x.debugX && !clear) || set
		case 'L':
			x.debugL = (x.debugL && !clear) || set
		case 'i':
			app.Warn("'-i' cannot be changed")
		default:
			app.Warn("unknown flag '%c'", r)
		}
	}
	return nil
}
Ejemplo n.º 2
0
// Print to stderr a description of the usage.
func (f *Flags) Usage() {
	if f.Argv0 == "" {
		f.Argv0 = os.Args[0]
	}
	ks := []string{}
	for k := range f.defs {
		ks = append(ks, k)
	}
	sort.Sort(sort.StringSlice(ks))
	opts := f.optUsage(ks)
	app.Eprintf("usage: %s %s %s\n", f.Argv0, opts, f.usage)
	if f.plus != nil {
		sep := ""
		if !strings.Contains(f.plus.help, ":") {
			sep = ":"
		}
		app.Eprintf("\t+%s%s %s\n", f.plus.name, sep, f.plus.help)
	}
	if f.minus != nil {
		sep := ""
		if !strings.Contains(f.minus.help, ":") {
			sep = ":"
		}
		app.Eprintf("\t-%s %s\n", f.minus.name, sep, f.minus.help)
	}
	for _, k := range ks {
		def := f.defs[k]
		sep := ""
		if !strings.Contains(def.help, ":") {
			sep = ":"
		}
		switch def.valp.(type) {
		case *Counter:
			app.Eprintf("\t-%s%s %s\n", def.name, sep, def.help)
			app.Eprintf("\t\tcan be repeated\n")
		default:
			app.Eprintf("\t-%s%s %s\n", def.name, sep, def.help)
		}
	}
}
Ejemplo n.º 3
0
func (l *lex) dprintf(fmts string, args ...interface{}) {
	if l.debug {
		app.Eprintf(fmts, args...)
	}
}
Ejemplo n.º 4
0
func (t *Fs) Dprintf(fmts string, args ...interface{}) {
	if t.Dbg {
		app.Eprintf(fmts, args...)
	}
}