run method

@override Future<void> run()

Runs this command.

The return value is wrapped in a Future if necessary and returned by CommandRunner.runCommand.

Implementation

@override
Future<void> run() async {
  final client = _apiClientFrom(argResults!);
  try {
    final alerts = (await client.get('/alerts') as List).cast<Map>();
    if (alerts.isEmpty) {
      stdout.writeln('nothing is alerting');
      return;
    }
    final now = DateTime.now();
    for (final alert in alerts) {
      final since = DateTime.parse(alert['since'] as String).toLocal();
      final held = now.difference(since);
      stdout.writeln('${alert['message']}  (for ${_humanize(held)})');
    }
    // Non-zero while anything is alerting, so this works as a health check in a
    // pipeline or a supervision script.
    exitCode = 1;
  } finally {
    client.close();
  }
}