Building a Flutter app

With codemagic.yaml, you can use Codemagic to build, test and publish Flutter apps. You can read more about how to use codemagic.yaml and see the structure of the file here. The necessary command for building an application goes under scripts in the overall architecture in the codemagic.yaml file. Here are some examples for the most common Flutter builds.

Android builds

Set up local properties

- echo "flutter.sdk=$HOME/programs/flutter" > "$FCI_BUILD_DIR/android/"

Building .apk

- flutter build apk --release

Building universal .apk(s) from existing app bundle(s) with user-specified keys

If your app settings in Codemagic have building Android App Bundles enabled, we will automatically include a script for generating a signed app-universal.apk during the YAML export. If you are creating a YAML file from a scratch, add the following script to receive the .apk file(s):

- android-app-bundle build-universal-apk \
    --bundle 'project_directory/build/**/outputs/**/*.aab' \
    --ks /tmp/keystore.keystore \
    --ks-pass $CM_KEYSTORE_PASSWORD \
    --ks-key-alias $CM_KEY_ALIAS_USERNAME \
    --key-pass $CM_KEY_ALIAS_PASSWORD

Please make sure to wrap the --bundle pattern in single quotes. If --bundle option is not specified, default glob pattern **/*.aab will be used.

More information about Android code signing can be found here.

Codemagic uses the android-app-bundle utility to build universal .apk files from Android App Bundles.

iOS builds

Building an unsigned application .app

  - flutter build ios --debug --no-codesign

Building a signed iOS application archive .ipa

Codemagic uses the xcode-project to prepare iOS application code signing properties for build.
  - xcode-project use-profiles
  - xcode-project build-ipa --workspace ios/Runner.xcworkspace --scheme Runner
Read more about different schemes in Apple documentation.

Web builds

- |
  flutter config --enable-web
  flutter build web --release
  cd build/web
  7z a -r ../ ./*

Testing, code signing and publishing a Flutter app

To test, code sign and publish a Flutter app:

  • Testing examples for a flutter app can be found here.
  • All iOS and Android applications need to be signed before release. Different script examples are available here.
  • All generated artifacts can be published to external services. The available integrations currently are email, Slack, Google Play and App Store Connect. It is also possible to publish elsewhere with custom scripts. Script examples for different options are available here.