func (m *Manager) handleFlags(command Command, name string, args []string) (Command, []string, error) {
var flagset *gnuflag.FlagSet
if flagged, ok := command.(FlaggedCommand); ok {
flagset = flagged.Flags()
} else {
flagset = gnuflag.NewFlagSet(name, gnuflag.ExitOnError)
}
var helpRequested bool
flagset.SetOutput(m.stderr)
if flagset.Lookup("help") == nil {
flagset.BoolVar(&helpRequested, "help", false, "Display help and exit")
}
if flagset.Lookup("h") == nil {
flagset.BoolVar(&helpRequested, "h", false, "Display help and exit")
}
err := flagset.Parse(true, args)
if err != nil {
return nil, nil, err
}
if helpRequested {
command = m.Commands["help"]
args = []string{name}
} else {
args = flagset.Args()
}
return command, args, nil
}