Hybrid package incorrectly marked as Flutter-only

[dnys1]

Related to: dart-lang/pub#3563

I recently published native_storage which is a hybrid package, capable of being used in Dart-only and Flutter contexts. It has no direct or transitive dependencies on the Flutter SDK.

It does, however, declare a flutter manifest in the pubspec.yaml for the cases in which the host project is a Flutter app:

https://github.com/celest-dev/celest/blob/32f3c44241468951e07470109f1dc4f1fc266283/packages/native/storage/pubspec.yaml#L45-L49

This causes pana to label the package as Flutter-only due to the following:

pana/lib/src/pubspec.dart

Lines 63 to 64 in 375a861

	bool get usesFlutter =>
	dependsOnFlutterSdk || dependsOnFlutterPackage || hasFlutterKey;

[sigurdm]

Yeah we don't have a good story for hybrid packages yet.

[dnys1]

A related issue to this is that if a Dart package depends on a package which contains an environment.flutter key, but does not itself have one, pub will allow the package to be published, but pana completely flips out:

https://pub.dev/packages/celest/score