Rspec, parallel_tests on Github Action

github_action_CI.yml

# Run RSpec in parallel on GitHub Actions with even test group runtimes
jobs:
  test:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        group: [1, 2]
    name: test group ${{ matrix.group }}/2

    services:
      postgres:
        image: postgres:17
        env:
          POSTGRES_USER: postgres
          POSTGRES_PASSWORD: postgres
        ports:
          - 5432:5432
        options: --health-cmd="pg_isready" --health-interval=10s --health-timeout=5s --health-retries=3

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Ruby
        uses: ruby/setup-ruby@v1
        with:
          ruby-version: .ruby-version
          bundler-cache: true

      - name: "Runtime cache: restore"
        uses: actions/cache/restore@v4
        id: cache-restore
        with:
          key: runtime-cache-all
          path: tmp/parallel_runtime_rspec.log

      - name: Run tests
        env:
          RAILS_ENV: test
          DATABASE_URL: postgres://postgres:postgres@localhost:5432
        run: |
          bundle exec rake parallel:setup
          bundle exec parallel_test -t rspec -n 2 --group-by runtime --only-group ${{ matrix.group }} --verbose
        # change to `--group-by filesize` when this runtime is missing or bad

      - name: "Runtime cache: clear previous chunk cache"
        shell: bash
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          gh extension install actions/gh-actions-cache
          gh actions-cache delete runtime-cache-${{ matrix.group }} --confirm
        continue-on-error: true # do not fail in case the key was deleted by a parallel run

      - name: "Runtime cache: prepare chunk"
        shell: bash
        run: |
          mkdir -p tmp/parallel_runtime_rspec
          mv tmp/parallel_runtime_rspec.log tmp/parallel_runtime_rspec/${{ matrix.group }}.log

      - name: "Runtime cache: store chunk"
        uses: actions/cache/save@v4
        with:
          key: runtime-cache-${{ matrix.group }}
          path: tmp/parallel_runtime_rspec

  store-runtime:
    runs-on: ubuntu-latest
    needs: test
    steps:
    - name: Checkout code
      uses: actions/checkout@v4

    - name: "Runtime cache: load chunk 1"
      uses: actions/cache/restore@v4
      with:
        key: runtime-cache-1
        path: tmp/parallel_runtime_rspec
    - name: "Runtime cache: load chunk 2"
      uses: actions/cache/restore@v4
      with:
        key: runtime-cache-2
        path: tmp/parallel_runtime_rspec
    - name: "Runtime cache: combine chunks"
      run: |
        cat tmp/parallel_runtime_rspec/* > tmp/parallel_runtime_rspec.log
        cat tmp/parallel_runtime_rspec.log
    - name: "Runtime cache: clear"
      env:
        GH_TOKEN: ${{ github.token }}
      run: |
        gh extension install actions/gh-actions-cache
        gh actions-cache delete runtime-cache-all --confirm
      continue-on-error: true # do not fail in case the key was deleted by a parallel run
    - name: "Runtime cache: store"
      uses: actions/cache/save@v4
      with:
        key: runtime-cache-all
        path: tmp/parallel_runtime_rspec.log