name: Push latest Docker image

on:
  push:
    # Trigger if latest_candidate updates. This is automatically done by another
    # workflow whenever tests pass on main - but events don't chain without using
    # personal access tokens so we just use a cron job.
    branches: [ latest_candidate ]
  schedule:
    # Run at 5:41 UTC daily
    - cron:  '41 5 * * *'
  workflow_dispatch:

jobs:
  push_to_registry:
    name: Push latest Docker image to Docker Hub
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: [3.9]
        node-version: [18.x]
    steps:
      - name: Check out the repo
        uses: actions/checkout@v2
        with:
          ref: latest_candidate
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1
      - name: Prepare image but do not push it yet
        uses: docker/build-push-action@v2
        with:
          context: .
          load: true
          tags: ${{ github.repository_owner }}/grist:latest
          cache-from: type=gha
      - name: Use Node.js ${{ matrix.node-version }} for testing
        uses: actions/setup-node@v1
        with:
          node-version: ${{ matrix.node-version }}
      - name: Set up Python ${{ matrix.python-version }} for testing - maybe not needed
        uses: actions/setup-python@v2
        with:
          python-version: ${{ matrix.python-version }}
      - name: Install Python packages
        run: |
          pip install virtualenv
          yarn run install:python
      - name: Install Node.js packages
        run: yarn install
      - name: Build Node.js code
        run: yarn run build:prod
      - name: Run tests
        run: TEST_IMAGE=${{ github.repository_owner }}/grist VERBOSE=1 DEBUG=1 MOCHA_WEBDRIVER_HEADLESS=1 yarn run test:docker
      - name: Log in to Docker Hub
        uses: docker/login-action@v1 
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
      - name: Push to Docker Hub
        uses: docker/build-push-action@v2
        with:
          context: .
          platforms: linux/amd64,linux/arm64/v8
          push: true
          tags: ${{ github.repository_owner }}/grist:latest
          cache-from: type=gha
          cache-to: type=gha,mode=max
      - name: Update latest branch
        uses: ad-m/github-push-action@8407731efefc0d8f72af254c74276b7a90be36e1
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          branch: latest
          force: true