main.yml

name: Flutter Web Build CI

on: 
  push:
    paths: 
    - 'lib/**'
    - '.github/**'
    - '*.yaml'
    - 'android/**'
    - 'ios/**'
    - 'web/**'
    - 'macos/**'
    branches: 
      - master
jobs: 
  build-release: 
    runs-on: macos-latest
    steps:
    - uses: actions/checkout@main
      with:
        persist-credentials: false # otherwise, the token used is the GITHUB_TOKEN, instead of your personal token
        fetch-depth: 0 # otherwise, you will failed to push refs to dest repo
    - uses: actions/setup-java@v1
      with:
        java-version: '12.x'
    - uses: subosito/flutter-action@v1
      with:
        flutter-version: '1.20.x' # you can use 1.12:  
        channel: 'beta' 
    - run: flutter config --enable-web
    - run: flutter pub get
    - name: build
      run: |
        flutter build web --release
        cd build
        mv -f web/* ../
    - name: Commit files
      run: |
        git config --local user.email "guochenghaha@gmail.com"
        git config --local user.name "TinoGuo"
        git add .
        git reset -- pubspec.lock
        git checkout HEAD -- pubspec.lock
        git status
        git commit -m "update artifact"
        git checkout gh-pages
        git cherry-pick master --strategy-option theirs
        git status
    - name: Push changes
      uses: ad-m/github-push-action@master
      with:
        github_token: ${{ secrets.GITHUB_TOKEN }}
        branch: gh-pages
#         directory: temp1234
        force: true