name: ci
on:
  pull_request:
  push:
    branches:
    - main
  schedule:
    - cron: '0 1 * * 0'

# https://docs.docker.com/build/ci/github-actions/share-image-jobs/
# just using caches instead of artifact upload.
jobs:
  docker-build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: docker/setup-buildx-action@v2
      -
        name: Create docker cache folder
        run: mkdir -p /tmp/docker
      -
        name: Restore docker image
        id: cache-docker
        uses: actions/cache@v3
        with:
          path: /tmp/docker
          key: ${{ runner.os }}-docker-${{ hashFiles('builder.Dockerfile') }}
      -
        name: Build docker builder-image
        if: steps.cache-docker.outputs.cache-hit != 'true'
        uses: docker/build-push-action@v4
        with:
          context: .
          file: builder.Dockerfile
          tags: cproject-builder:latest
          outputs: type=docker,dest=/tmp/docker/${{ runner.os }}-builder-image.tar

  build-and-test:
    runs-on: ubuntu-latest
    needs: docker-build
    steps:
      - uses: actions/checkout@v3
      - uses: docker/setup-buildx-action@v2
      -
        name: Restore docker image
        id: cache-docker
        uses: actions/cache@v3
        with:
          path: /tmp/docker
          key: ${{ runner.os }}-docker-${{ hashFiles('builder.Dockerfile') }}
      -
        name: Load image
        run: |
          docker load --input /tmp/docker/${{ runner.os }}-builder-image.tar
          docker image ls -a
      -
        name: Build library
        run: |
          docker run \
            --rm \
            --platform linux/amd64 \
            --workdir /builder/mnt \
            -v ${{ github.workspace }}:/builder/mnt \
            cproject-builder:latest \
            /bin/bash -c "rm -rf build; cmake -B build; cmake --build build"
      -
        name: Test library
        run: |
          docker run \
            --rm \
            --platform linux/amd64 \
            --workdir /builder/mnt/tests/unittest \
            -v ${{ github.workspace }}:/builder/mnt \
            cproject-builder:latest \
            /bin/bash -c "ceedling clobber; ceedling gcov:all; ceedling utils:gcov"
      -
        name: Archive coverage results
        shell: bash
        run: |
          staging="reports-${{github.run_number}}"
          mkdir -p "$staging"
          cp -r tests/unittest/build/artifacts/gcov "$staging"
          tar czf "$staging.tar.gz" "$staging"
          echo "ASSET=$staging.tar.gz" >> $GITHUB_ENV
      -
        name: Archive artifacts
        uses: actions/upload-artifact@v3
        with:
          name: reports-${{github.run_number}}
          path: ${{ env.ASSET }}
          retention-days: 3

# TODO: delete cache on merge.