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 rest = argResults!.rest;
  if (rest.isEmpty) throw CliError('usage: blueprint plan <node>');

  final client = _apiClientFrom(argResults!);
  try {
    final drift = await client.drift(rest.first);
    if (drift == null) {
      throw CliError('nothing is declared for ${rest.first}');
    }

    if (drift.converged) {
      stdout.writeln('${rest.first} is converged (${drift.blueprint})');
      return;
    }

    stdout.writeln('${rest.first} has drifted from ${drift.blueprint}:');
    for (final c in drift.changes) {
      if (c.kind == ChangeKind.noop) continue;
      stdout.writeln('  ${c.kind.name.padRight(8)} ${c.id}  — ${c.reason}');
    }
    // A distinct code, so this is usable in CI and on a timer without anyone
    // having to parse the output.
    exitCode = 2;
  } finally {
    client.close();
  }
}