How to run dart.build in WebStorm ?

Hello

I can't figure out how to run the dart.build (or any other dart) file in WebStorm.

The only option to run dart files seems to be DartUnit, but I think that is only for running tests.

I need to run the build.dart to create the WebUI Template output files.

It would also be great if it would be able automatically run this whenever a file changes (like the Dart Editor does).

Please help ;)

Cheers
Bernd