Function flagFromError

command_parse.go:16–23

flagFromError tries to parse a provided flag from an error message. If the parsing fails, it returns the input error and an empty string

(err error)

// flagFromError tries to parse a provided flag from an error message. If the
// parsing fails, it returns the input error and an empty string
func flagFromError(err error) (string, error) {
	errStr := err.Error()
	trimmed := strings.TrimPrefix(errStr, providedButNotDefinedErrMsg)
	if errStr == trimmed {
		return "", err
	}
	return trimmed, nil
}

func (cmd *Command) parseFlags(args Args) (Args, error) {
	tracef("parsing flags from arguments %[1]q (cmd=%[2]q)", args, cmd.Name)