verifyTaskPhasesConsistency function

Future<void> verifyTaskPhasesConsistency(Map<String, TaskWithDeps> taskMap)

Verify that all tasks in taskMap lie in phases that are consistent with their dependencies.

No task can depend on another task that belongs to a build phase that runs after its own.

Tasks cannot be executed on a Zone that does not include its phase.

Any inconsistencies will cause a DartleException to be thrown by this method.

Implementation

Future<void> verifyTaskPhasesConsistency(
    Map<String, TaskWithDeps> taskMap) async {
  final errors = <String>{};

  // a task's dependencies must be in the same or earlier phases
  for (final task in taskMap.values) {
    task.dependencies.where((dep) => dep.phase.isAfter(task.phase)).forEach(
        (t) => errors.add("Task '${task.name}' in phase '${task.phase.name}' "
            "cannot depend on '${t.name}' in phase '${t.phase.name}'"));
  }

  if (errors.isNotEmpty) {
    throw DartleException(
        message: "The following tasks have dependency on tasks which are in an "
            "incompatible build phase:\n"
            '${errors.map((e) => '  * $e.').join('\n')}\n');
  }

  final phases = TaskPhase.currentZoneTaskPhases;
  for (final task in taskMap.values) {
    if (!phases.contains(task.phase)) {
      errors.add("Task '${task.name}' belongs to phase '${task.phase.name}'.");
    }
  }

  if (errors.isNotEmpty) {
    final phaseNames = phases.map((p) => p.name).join(', ');
    throw DartleException(
        message: "The following tasks do not belong to any of the phases in "
            "the current Dart Zone, which are $phaseNames}:\n"
            '${errors.map((e) => '  * $e.').join('\n')}\n');
  }
}