forked from firka/flutter
cccb49d3e6
If the Flutter SDK is updated we need to invalidate the widget preview scaffold project to, at the very least, rebuild the precompiled application. Similarly, if the root project's `pubspec.yaml` is updated, the scaffold project's pubspec should be regenerated. This change adds a `preview_manifest.json` to the scaffold project which contains information related to: - The manifest schema version - The Dart SDK version the project was generated with - The last known hash of the root project's pubspec.yaml This information is used to determine whether or not the scaffold project needs to be regenerated or the scaffold pubspec needs to be updated to reflect changes to the root project's pubspec since the previewer was last run.