Dart: Transforming a command line application

Question

Is it possible to run transformer on a command line application before running it?

For example, if I have a class that mixes in Observable class. And I would like to transform it so that dirtCheck is transformed into ChangeNotifier.

holder.dart

class Member extends Object with ChangeNotifier {
  @observable
  String name = "";
}

class Holder extends Object with ChangeNotifier {
  Holder() {
  }

  @observable
  Member member = new Member();
}

pubspec.yml

transformers:
- observe:
  files:
    - bin/models/holder.dart

If I run this application from IntelliJ IDE, it doesn't seem to run the transformer on it before executing main.dart.

Thanks.

Günter Zöchbauer Günter Zöchbauer · Accepted Answer · 2016-04-19T11:10:26

Transfomers are not applied to command line apps. Only code that is served using pub serve or pub build runs and applies transformers. Your code should run on the server/command line as is. There is no need to run transformers.

Transformers are used for observe to replace dart:mirrors access by generated code to prevent code bloat for dart2js-generated JS but this is no issue on the command line.

Dart: Transforming a command line application

1 Answers