synapse/.github/workflows/release-artifacts.yml

# GitHub actions workflow which builds the release artifacts.

name: Build release artifacts

on:
  push:
    # we build on develop and release branches to (hopefully) get early warning
    # of things breaking
    branches: ["develop", "release-*"]

    # we also rebuild on tags, so that we can be sure of picking the artifacts
    # from the right tag.
    tags: ["v*"]

permissions:
  contents: write

jobs:
  # first get the list of distros to build for.
  get-distros:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-python@v2
      - id: set-distros
        run: |
          echo "::set-output name=distros::$(scripts-dev/build_debian_packages --show-dists-json)"
    # 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:
      - uses: actions/checkout@v2
        with:
          path: src
      - uses: actions/setup-python@v2
      - run: ./src/scripts-dev/build_debian_packages "${{ matrix.distro }}"
      - uses: actions/upload-artifact@v2
        with:
          name: debs
          path: debs/*

  build-sdist:
    name: "Build pypi distribution files"
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-python@v2
      - run: pip install wheel
      - run: |
          python setup.py sdist bdist_wheel
      - uses: actions/upload-artifact@v2
        with:
          name: python-dist
          path: dist/*

  # if it's a tag, create a release and attach the artifacts to it
  attach-assets:
    name: "Attach assets to release"
    if: startsWith(github.ref, 'refs/tags/')
    needs:
      - build-debs
      - build-sdist
    runs-on: ubuntu-latest
    steps:
      - name: Download all workflow run artifacts
        uses: actions/download-artifact@v2
      - name: Build a tarball for the debs
        run: tar -cvJf debs.tar.xz debs
      - name: Attach to release
        uses: softprops/action-gh-release@a929a66f232c1b11af63782948aa2210f981808a  # PR#109
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          files: |
            python-dist/*
            debs.tar.xz
          # if it's not already published, keep the release as a draft.
          draft: true
          # mark it as a prerelease if the tag contains 'rc'.
          prerelease: ${{ contains(github.ref, 'rc') }}