code.yml

name: Code CI

on:
  push:
  pull_request:
env:
  # The target python version, which must match the Dockerfile version
  CONTAINER_PYTHON: "3.11"

jobs:
  lint:
    # pull requests are a duplicate of a branch push if within the same repo.
    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.repository
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Install python packages
        uses: ./.github/actions/install_requirements
        with:
          requirements_file: requirements-dev-3.x.txt
          install_options: -e .[dev]

      - name: Lint
        run: tox -e pre-commit,mypy

  test:
    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.repository
    strategy:
      fail-fast: false
      matrix:
        os: ["ubuntu-latest"] # can add windows-latest, macos-latest
        python: ["3.8", "3.9", "3.10", "3.11"]
        install: ["-e .[dev]"]
        # Make one version be non-editable to test both paths of version code
        include:
          - os: "ubuntu-latest"
            python: "3.7"
            install: ".[dev]"

    runs-on: ${{ matrix.os }}
    env:
      # https://github.com/pytest-dev/pytest/issues/2042
      PY_IGNORE_IMPORTMISMATCH: "1"

    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          # Need this to get version number from last tag
          fetch-depth: 0

      - name: Install python packages
        uses: ./.github/actions/install_requirements
        with:
          python_version: ${{ matrix.python }}
          requirements_file: requirements-test-${{ matrix.os }}-${{ matrix.python }}.txt
          install_options: ${{ matrix.install }}

      - name: List dependency tree
        run: pipdeptree

      - name: Run tests
        run: tox -e pytest

      - name: Upload coverage to Codecov
        uses: codecov/codecov-action@v3
        with:
          name: ${{ matrix.python }}/${{ matrix.os }}
          files: cov.xml

  dist:
    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.repository
    runs-on: "ubuntu-latest"

    steps:
      - name: Checkout
        uses: actions/checkout@v3
        with:
          # Need this to get version number from last tag
          fetch-depth: 0

      - name: Build sdist and wheel
        run: |
          export SOURCE_DATE_EPOCH=$(git log -1 --pretty=%ct) && \
          pipx run build

      - name: Upload sdist and wheel as artifacts
        uses: actions/upload-artifact@v3
        with:
          name: dist
          path: dist

      - name: Check for packaging errors
        run: pipx run twine check --strict dist/*

      - name: Install python packages
        uses: ./.github/actions/install_requirements
        with:
          python_version: ${{env.CONTAINER_PYTHON}}
          requirements_file: requirements.txt
          install_options: dist/*.whl

      - name: Test module --version works using the installed wheel
        # If more than one module in src/ replace with module name to test
        run: python -m $(ls src | head -1) --version

  container:
    needs: [lint, dist, test]
    runs-on: ubuntu-latest

    permissions:
      contents: read
      packages: write

    env:
      TEST_TAG: "testing"

    steps:
      - name: Checkout
        uses: actions/checkout@v3

      # image names must be all lower case
      - name: Generate image repo name
        run: echo IMAGE_REPOSITORY=ghcr.io/$(tr '[:upper:]' '[:lower:]' <<< "${{ github.repository }}") >> $GITHUB_ENV

      - name: Download wheel and lockfiles
        uses: actions/download-artifact@v3
        with:
          path: artifacts/

      - name: Log in to GitHub Docker Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v2

      - name: Build and export to Docker local cache
        uses: docker/build-push-action@v5
        with:
        # Note build-args, context, file, and target must all match between this
        # step and the later build-push-action, otherwise the second build-push-action
        # will attempt to build the image again
          build-args: |
            PIP_OPTIONS=-r lockfiles/requirements.txt dist/*.whl
          context: artifacts/
          file: ./Dockerfile
          target: runtime
          load: true
          tags: ${{ env.TEST_TAG }}
          # If you have a long docker build (2+ minutes), uncomment the 
          # following to turn on caching. For short build times this 
          # makes it a little slower
          #cache-from: type=gha
          #cache-to: type=gha,mode=max

      - name: Test cli works in cached runtime image
        run: docker run docker.io/library/${{ env.TEST_TAG }} --version

      - name: Create tags for publishing image
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE_REPOSITORY }}
          tags: |
            type=ref,event=tag
            type=raw,value=latest, enable=${{ github.ref_type == 'tag' }}
          # type=edge,branch=main
          # Add line above to generate image for every commit to given branch,
          # and uncomment the end of if clause in next step

      - name: Push cached image to container registry
        if: github.ref_type == 'tag' # || github.ref_name == 'main'
        uses: docker/build-push-action@v5
        # This does not build the image again, it will find the image in the 
        # Docker cache and publish it
        with:
        # Note build-args, context, file, and target must all match between this
        # step and the previous build-push-action, otherwise this step will 
        # attempt to build the image again
          build-args: |
            PIP_OPTIONS=-r lockfiles/requirements.txt dist/*.whl
          context: artifacts/
          file: ./Dockerfile
          target: runtime
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

  release:
    # upload to PyPI and make a release on every tag
    needs: [lint, dist, test]
    if: ${{ github.event_name == 'push' && github.ref_type == 'tag' }}
    runs-on: ubuntu-latest
    env:
      HAS_PYPI_TOKEN: ${{ secrets.PYPI_TOKEN != '' }}

    steps:
      - uses: actions/download-artifact@v3

      - name: Fixup blank lockfiles
        # Github release artifacts can't be blank
        run: for f in lockfiles/*; do [ -s $f ] || echo '# No requirements' >> $f; done

      - name: Github Release
        # We pin to the SHA, not the tag, for security reasons.
        # https://docs.github.com/en/actions/learn-github-actions/security-hardening-for-github-actions#using-third-party-actions
        uses: softprops/action-gh-release@de2c0eb89ae2a093876385947365aca7b0e5f844 # v0.1.15
        with:
          prerelease: ${{ contains(github.ref_name, 'a') || contains(github.ref_name, 'b') || contains(github.ref_name, 'rc') }}
          files: |
            dist/*
            lockfiles/*
          generate_release_notes: true
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Publish to PyPI
        if: ${{ env.HAS_PYPI_TOKEN }}
        uses: pypa/gh-action-pypi-publish@release/v1
        with:
          password: ${{ secrets.PYPI_TOKEN }}