heroku-buildpack-flutter-cli

Use this to run Dart programs on Heroku that share code with a Flutter app.

The buildpack compiles all **/bin/*.dart files into statically-linked Linux amd64 binaries with filenames ending in .exe. For example, it compiles dart/bin/test_bots.dart to dart/bin/test_bots.exe.

This buildpack does not compile Flutter apps.

Specify Flutter Version

Specify the Flutter version by setting config variables FLUTTER_VERSION and FLUTTER_SHA256. You can find Flutter builds at:

https://docs.flutter.dev/development/tools/sdk/releases?tab=linux

Flutter team doesn't care to supply SHA-256 digests for you, so you must download the massive archive and calculate the digest yourself.

Example values:

• FLUTTER_VERSION=2.10.2
• FLUTTER_SHA256=03de160d1c30730a248cb5e168ec2de60f883d7e365e6cf57b27786e85436c0f

Supports only stable Flutter releases. Does not use the latest version of Flutter when the version is unspecified.

Add to Heroku App

Add it to your Heroku app with:

$ heroku buildpacks:add --app=${APP_NAME} --index 1 https://github.com/leonhard-llc/heroku-buildpack-flutter-cli.git

Includes Asset Files

When building a binary in a directory, the buildpack finds all non-dart files under the directory and includes them in the Heroku slug.

This works around Dart Team's inexplicable abandonment of the resource package which allowed embedding files into binaries.