build-publish-python-packages.yaml

# This is a GitHub workflow defining a set of jobs with a set of steps.
# ref: https://docs.github.com/en/actions/learn-github-actions/workflow-syntax-for-github-actions
#
name: Build and publish Python packages

# Always test build of packages, but only publish to PyPI on pushed tag
on:
  pull_request:
    paths:
      - "dask-gateway/**"
      - "dask-gateway-server/**"
      - ".github/workflows/build-publish-python-packages.yaml"
  push:
    paths:
      - "dask-gateway/**"
      - "dask-gateway-server/**"
      - ".github/workflows/build-publish-python-packages.yaml"
    branches: ["main"]
    tags: ["**"]
  workflow_dispatch:

jobs:
  # Builds sdist (.tar.gz) and wheels (.whl) for the Python packages.
  #
  # - dask-gateway's wheel is platform and CPU architecture independent
  # - dask-gateway-server's wheel is platform dependent (linux/mac) and CPU
  #   architecture dependent (amd64/arm64) because of the compiled Golang
  #   binary.
  #
  # Golang cross platform (GOOS env) and cross architecture (GOARCH env)
  # compilation is used to produce different artifacts independent of the job's
  # platform and CPU architecture.
  #
  build:
    runs-on: ubuntu-22.04

    strategy:
      fail-fast: false
      matrix:
        # GOOS and GOARCH options available:
        # https://go.dev/doc/install/source#environment
        #
        include:
          - package: dask-gateway
            upload_sdist: true

          - package: dask-gateway-server
            GOOS: linux
            GOARCH: amd64
            upload_sdist: true

          - package: dask-gateway-server
            GOOS: linux
            GOARCH: arm64
            upload_sdist: false

          - package: dask-gateway-server
            GOOS: darwin
            GOARCH: amd64
            upload_sdist: false

          - package: dask-gateway-server
            GOOS: darwin
            GOARCH: arm64
            upload_sdist: false

    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-go@v5
      - uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Install build package
        run: |
          pip install build
          pip list

      - name: Build sdist and wheel
        env:
          GOOS: "${{ matrix.GOOS }}"
          GOARCH: "${{ matrix.GOARCH }}"
        working-directory: ${{ matrix.package }}
        run: |
          python -m build --sdist --wheel .
          ls -alh ./dist
          sha256sum ./dist/* | tee SHA256SUMS

      - name: Upload sdist artifact
        if: matrix.upload_sdist
        uses: actions/upload-artifact@v4
        with:
          name: ${{ format('{0}_{1}', matrix.package, 'sdist') }}
          path: ${{ matrix.package }}/dist/*.tar.gz
          if-no-files-found: error

      - name: Upload wheel artifact
        uses: actions/upload-artifact@v4
        with:
          name: ${{ format('{0}_{1}-{2}-{3}', matrix.package, 'wheel', matrix.GOOS, matrix.GOARCH) }}
          path: ${{ matrix.package }}/dist/*.whl
          if-no-files-found: error

  publish:
    needs: build
    runs-on: ubuntu-22.04

    strategy:
      fail-fast: false
      matrix:
        package:
          - dask-gateway
          - dask-gateway-server

    steps:
      - name: Download built source distributions and wheels
        uses: actions/download-artifact@v4
        with:
          pattern: ${{ matrix.package }}_*
          path: ${{ matrix.package }}/dist
          merge-multiple: true

      - name: Inspect built source distributions and wheels
        working-directory: ${{ matrix.package }}
        run: |
          ls -alh ./dist
          sha256sum ./dist/* | tee SHA256SUMS

      # Because we have two separate deploy tokens for the dask-gateway and
      # dask-gateway-server packages, we define two separate steps to pick out
      # the relevant secret depending on matrix.package.
      - name: Publish to PyPI (dask-gateway)
        uses: pypa/gh-action-pypi-publish@release/v1
        if: >-
          startsWith(github.ref, 'refs/tags/')
          && matrix.package == 'dask-gateway'
        with:
          user: __token__
          password: "${{ secrets.pypi_token__dask_gateway }}"
          packages_dir: ${{ matrix.package }}/dist

      - name: Publish to PyPI (dask-gateway-server)
        uses: pypa/gh-action-pypi-publish@release/v1
        if: >-
          startsWith(github.ref, 'refs/tags/')
          && matrix.package == 'dask-gateway-server'
        with:
          user: __token__
          password: "${{ secrets.pypi_token__dask_gateway_server }}"
          packages_dir: ${{ matrix.package }}/dist