# GitHub actions workflow which builds the release artifacts.

name: Build release artifacts

on:
  # we build on PRs and develop to (hopefully) get early warning
  # of things breaking (but only build one set of debs). PRs skip
  # building wheels on ARM.
  pull_request:
  push:
    branches: ["develop", "release-*"]

    # we do the full build on tags.
    tags: ["v*"]
  merge_group:
  workflow_dispatch:

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

permissions:
  contents: write

jobs:
  get-distros:
    name: "Calculate list of debian distros"
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
        with:
          python-version: "3.x"
      - id: set-distros
        run: |
          # if we're running from a tag, get the full list of distros; otherwise just use debian:sid
          # NOTE: inside the actual Dockerfile-dhvirtualenv, the image name is expanded into its full image path
          dists='["debian:sid"]'
          if [[ $GITHUB_REF == refs/tags/* ]]; then
              dists=$(scripts-dev/build_debian_packages.py --show-dists-json)
          fi
          echo "distros=$dists" >> "$GITHUB_OUTPUT"
    # map the step outputs to job outputs
    outputs:
      distros: ${{ steps.set-distros.outputs.distros }}

  # now build the packages with a matrix build.
  build-debs:
    needs: get-distros
    name: "Build .deb packages"
    runs-on: ubuntu-latest
    strategy:
      matrix:
        distro: ${{ fromJson(needs.get-distros.outputs.distros) }}

    steps:
      - name: Checkout
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          path: src

      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0

      - name: Set up docker layer caching
        uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-

      - name: Set up python
        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
        with:
          python-version: "3.x"

      - name: Build the packages
        # see https://github.com/docker/build-push-action/issues/252
        # for the cache magic here
        run: |
          ./src/scripts-dev/build_debian_packages.py \
            --docker-build-arg=--cache-from=type=local,src=/tmp/.buildx-cache \
            --docker-build-arg=--cache-to=type=local,mode=max,dest=/tmp/.buildx-cache-new \
            --docker-build-arg=--progress=plain \
            --docker-build-arg=--load \
            "${{ matrix.distro }}"
          rm -rf /tmp/.buildx-cache
          mv /tmp/.buildx-cache-new /tmp/.buildx-cache

      - name: Artifact name
        id: artifact-name
        # We can't have colons in the upload name of the artifact, so we convert
        # e.g. `debian:sid` to `sid`.
        env:
          DISTRO: ${{ matrix.distro }}
        run: |
          echo "ARTIFACT_NAME=${DISTRO#*:}" >> "$GITHUB_OUTPUT"

      - name: Upload debs as artifacts
        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
        with:
          name: debs-${{ steps.artifact-name.outputs.ARTIFACT_NAME }}
          path: debs/*

  build-wheels:
    name: Build wheels on ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os:
          - ubuntu-24.04
          - ubuntu-24.04-arm
        # is_pr is a flag used to exclude certain jobs from the matrix on PRs.
        # It is not read by the rest of the workflow.
        is_pr:
          - ${{ startsWith(github.ref, 'refs/pull/') }}

        exclude:
          # Don't build aarch64 wheels on PR CI.
          - is_pr: true
            os: "ubuntu-24.04-arm"

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
        with:
          # setup-python@v4 doesn't impose a default python version. Need to use 3.x
          # here, because `python` on osx points to Python 2.7.
          python-version: "3.x"

      - name: Install cibuildwheel
        run: python -m pip install cibuildwheel==3.2.1

      - name: Only build a single wheel on PR
        if: startsWith(github.ref, 'refs/pull/')
        run: echo "CIBW_BUILD="cp310-manylinux_*"" >> $GITHUB_ENV

      - name: Build wheels
        run: python -m cibuildwheel --output-dir wheelhouse
        env:
          # The platforms that we build for are determined by the
          # `tool.cibuildwheel.skip` option in `pyproject.toml`.

          # We skip testing wheels for the following platforms in CI:
          #
          # pp3*-* (PyPy wheels) broke in CI (TODO: investigate).
          # musl: (TODO: investigate).
          CIBW_TEST_SKIP: pp3*-* *musl*

      - uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
        with:
          name: Wheel-${{ matrix.os }}
          path: ./wheelhouse/*.whl

  build-sdist:
    name: Build sdist
    runs-on: ubuntu-latest
    if: ${{ !startsWith(github.ref, 'refs/pull/') }}

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
        with:
          python-version: "3.10"

      - run: pip install build

      - name: Build sdist
        run: python -m build --sdist

      - uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
        with:
          name: Sdist
          path: dist/*.tar.gz

  # if it's a tag, create a release and attach the artifacts to it
  attach-assets:
    name: "Attach assets to release"
    if: ${{ !failure() && !cancelled() && startsWith(github.ref, 'refs/tags/') }}
    needs:
      - build-debs
      - build-wheels
      - build-sdist
    runs-on: ubuntu-latest
    steps:
      - name: Download all workflow run artifacts
        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
      - name: Build a tarball for the debs
        # We need to merge all the debs uploads into one folder, then compress
        # that.
        run: |
          mkdir debs
          mv debs*/* debs/
          tar -cvJf debs.tar.xz debs
      - name: Attach to release
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh release upload "${{ github.ref_name }}" \
            Sdist/* \
            Wheel*/* \
            debs.tar.xz \
            --repo ${{ github.repository }}
