error function

Never error(
  1. String message, {
  2. int? errorCode,
})

Exits the CLI immediately with a messages

Implementation

Never error(String message, {int? errorCode}) {
  assert(
    () {
      throw message;
    }(),
  );
  io.stderr.writeln(message);

  final code = errorCode ?? -1;
  exitCode = code;
  io.exit(code);
}