cache.yaml

name: cache
permissions: {}
on:
  pull_request:
    types:
      - closed
defaults:
  run:
    shell: bash

env:
  DOCKER_FILE_DIRECTORY: environments
  DOCKER_COMPOSE_DIRECTORY: environments/ci
  COMPOSE_DOCKER_CLI_BUILD: 1
  DOCKER_BUILDKIT: 1
  USE_CACHE: true

jobs:
  create-cache:
    if: github.event.pull_request.merged == true
    name: ${{ matrix.os }} / ${{ matrix.python-version }}
    runs-on: ${{ matrix.image }}
    timeout-minutes: 10
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu]
        python-version: ["3.10", "3.11", "3.12"]
        include:
          - os: ubuntu
            image: ubuntu-latest
    permissions:
      contents: read

    steps:
      - uses: actions/checkout@v4

      - name: Check version info
        run: pwd && docker compose version && docker --version

      # Provide a builder instance with docker buildx.
      - name: Set up Docker Buildx
        if: env.USE_CACHE == 'true'
        uses: docker/setup-buildx-action@v3

      # Specify a cache directory for build cache, and reuse past build cache as long as there are no changes to the environment files.
      - name: Cache Docker layers
        if: env.USE_CACHE == 'true'
        id: build-cache
        uses: actions/cache@v4
        with:
          path: ${{ runner.temp }}/${{ matrix.python-version }}
          key: buildx-${{ hashFiles(format('{0}/Dockerfile', env.DOCKER_FILE_DIRECTORY), format('{0}/docker-compose.yaml', env.DOCKER_COMPOSE_DIRECTORY), 'poetry.lock') }}

      # If build cache is not found, build the Docker image to create a new cache.
      - name: Build docker image with cache using buildx
        if: steps.build-cache.outputs.cache-hit != 'true' && env.USE_CACHE == 'true'
        uses: docker/bake-action@v6
        with:
          files: "${{ env.DOCKER_COMPOSE_DIRECTORY }}/docker-compose.yaml"
          workdir: ${{ env.DOCKER_COMPOSE_DIRECTORY }}
          load: true
          set: |
            core.args.PYTHON_VERSION=${{ matrix.python-version }}
            core.cache-to=type=local,dest=${{ runner.temp }}/${{ matrix.python-version }}