name: build

on:
  pull_request:
    paths:
      - ".github/workflows/ci-build.yml"
      - "backend/**"
      - "frontend/apps/**"
      - ".dockerignore"
      - "docker-init.sh"
      - "Dockerfile"
      - "!**.md"

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build-images:
    name: Validate Docker build
    runs-on: ubuntu-latest
    permissions:
      contents: read

    steps:
      - uses: actions/checkout@v6
        with:
          persist-credentials: false

      - name: set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      - name: expose GitHub Actions cache
        uses: actions/cache@v5
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-

      - name: free disk space
        run: |
          sudo rm -rf /usr/share/dotnet
          sudo rm -rf /opt/ghc
          sudo rm -rf /usr/local/share/boost
          docker system prune -af

      - name: build docker image without pushing
        run: |
          docker buildx build --load \
              --cache-from type=local,src=/tmp/.buildx-cache \
              --cache-to type=local,dest=/tmp/.buildx-cache-new,mode=max \
              --build-arg SKIP_BACKEND_TEST=true --build-arg SKIP_FRONTEND_TEST=true \
              --platform linux/amd64 .

      - name: build example docker image without pushing
        run: |
          docker buildx build --load \
              --cache-from type=local,src=/tmp/.buildx-cache \
              --build-arg SKIP_BACKEND_TEST=true --build-arg SKIP_FRONTEND_TEST=true \
              --platform linux/amd64 -f backend/_example/memory_store/Dockerfile .

      - name: rotate cache
        run: |
          rm -rf /tmp/.buildx-cache
          mv /tmp/.buildx-cache-new /tmp/.buildx-cache || true