fix: Unable to generate a build with flavours and selected flutter-version

[muhammadmateen027]

App ID: style_fusion

Description

Trying to generate android release but with flutter's version 3.19.5. After running the command, I can see the below errors:

shorebird release android --target ./lib/main_development.dart --flavor development --flutter-version 3.19.5
✓ Installing Flutter 3.19.5 (47571af6a3) (8.0s)
✗ Failed to build: Downloading Darwin arm64 Dart SDK from Flutter engine 255003dc70296f2db5855f12de4d9f93a7b8b087...
Building flutter tool...
Flutter assets will be downloaded from https://download.shorebird.dev. Make sure you trust this source!
You are applying Flutter's app_plugin_loader Gradle plugin imperatively using the apply script method, 
which is deprecated and will be removed in a future release. Migrate to applying Gradle plugins with the 
declarative plugins block: https://flutter.dev/go/flutter-gradle-plugin-apply

You are applying Flutter's main Gradle plugin imperatively using the apply script method, 
which is deprecated and will be removed in a future release. Migrate to applying Gradle plugins with the 
declarative plugins block: https://flutter.dev/go/flutter-gradle-plugin-apply


FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:signDevelopmentReleaseBundle'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.FinalizeBundleTask$BundleToolRunnable
   > java.lang.NullPointerException (no error message)

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 36s
Gradle task bundleDevelopmentRelease failed with exit code 1
 (91.5s)

If you aren't sure why this command failed, re-run with the --verbose flag to see more information.

Additionally, as I selected the flutter's version 3.19.5, it should not show this message:

You are applying Flutter's main Gradle plugin imperatively using the apply script method, 
which is deprecated........

shorebird Version:

Shorebird 1.0.5 • git@github.com:shorebirdtech/shorebird.git
Flutter 3.19.6 • revision 4b22a31bd9911c8317319292a9a103217919649e
Engine • revision ef2c5cd963e481d44741e2a587ecb7ad69629ce1

[eseidel]

Does your app build with flutter at 3.19.5? the gradle message in question came as part of 3.16.0 I believe. https://docs.flutter.dev/release/breaking-changes/flutter-gradle-plugin-apply

[muhammadmateen027]

Yes, my app is being build with flutter's version 3.19.5 and I am also supporting 3.10.6.
When I try to build with 3.10.6, still I can see the same error.

[eseidel]

I've not run across apps before which build across a range of Flutter versions. Can you tell me more about the use case? I would not expect the same source code to build with both Flutter 3.10.6 and 3.19.5. Or did you mean 3.19.6?

[eseidel]

We would love to help, but need more information. Please feel welcome to re-open (or comment and we can). Closing for now without more information.