default:
		return fmt.Errorf("invalid linkmode: %q", s)
	case "auto":
		*mode = LinkAuto
	case "internal":
		*mode = LinkInternal
	case "external":
		*mode = LinkExternal
	}
	return nil
}

func (mode *LinkMode) String() string {
	switch *mode {
	case LinkAuto:
		return "auto"
	case LinkInternal:
		return "internal"
	case LinkExternal:
		return "external"
	}