build.yml

name: build
# Controls when the action will run.
on:
  # Triggers the workflow on push events but only for the release branch
  push:
    branches: [release]
  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:
# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  build:
    # The type of runner that the job will run on
    runs-on: macos-latest
    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-java@v1
        with:
          java-version: "12.x"
      - uses: subosito/flutter-action@v1
        with:
          channel: stable
      - run: flutter pub get
      - run: flutter build apk
      - run: flutter build ios --release --no-codesign
      # upload builds to artifact
      # TODO ios ipa later
      - uses: actions/upload-artifact@v2
        with:
          name: builds
          path: build/app/outputs/apk/release/app-release.apk