publish_to_pypi.yml

# This is taken from
# https://packaging.python.org/en/latest/guides/publishing-package-distribution-releases-using-github-actions-ci-cd-workflows/#the-whole-ci-cd-workflow
# but with the following differences
# - removed the TestPyPI part
# - instead of `on: push`, we have `tags` in there too

name: Publish Python 🐍 distribution 📦 to PyPI

on: 
  push:
    tags:
      - "v[0-9]+.[0-9]+.[0-9]+*"


jobs:
  build:
    name: Build distribution 📦
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v4
      with:
        persist-credentials: false
    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: "3.x"
    - name: Install pypa/build
      run: >-
        python3 -m
        pip install
        build
        --user
    - name: Build a binary wheel and a source tarball
      run: python3 -m build
    - name: Store the distribution packages
      uses: actions/upload-artifact@v4
      with:
        name: python-package-distributions
        path: dist/

  publish-to-pypi:
    name: >-
      Publish Python 🐍 distribution 📦 to PyPI
    if: startsWith(github.ref, 'refs/tags/')  # only publish to PyPI on tag pushes
    needs:
    - build
    runs-on: ubuntu-latest
    environment:
      name: pypi
      url: https://pypi.org/p/narwhals
    permissions:
      id-token: write  # IMPORTANT: mandatory for trusted publishing

    steps:
    - name: Download all the dists
      uses: actions/download-artifact@v4
      with:
        name: python-package-distributions
        path: dist/
    - name: Publish distribution 📦 to PyPI
      uses: pypa/gh-action-pypi-publish@release/v1

  github-release:
    name: >-
      Sign the Python 🐍 distribution 📦 with Sigstore
      and upload them to GitHub Release
    needs:
    - publish-to-pypi
    runs-on: ubuntu-latest
    permissions:
      contents: write  # IMPORTANT: mandatory for making GitHub Releases
      id-token: write  # IMPORTANT: mandatory for sigstore
    steps:
    - name: Download all the dists
      uses: actions/download-artifact@v4
      with:
        name: python-package-distributions
        path: dist/
    - name: Sign the dists with Sigstore
      uses: sigstore/gh-action-sigstore-python@v3.0.0
      with:
        inputs: >-
          ./dist/*.tar.gz
          ./dist/*.whl
    - name: Create GitHub Release
      env:
        GITHUB_TOKEN: ${{ github.token }}
      run: >-
        gh release create
        "$GITHUB_REF_NAME"
        --repo "$GITHUB_REPOSITORY"
        --notes ""
    - name: Upload artifact signatures to GitHub Release
      env:
        GITHUB_TOKEN: ${{ github.token }}
      # Upload to GitHub Release using the `gh` CLI.
      # `dist/` contains the built packages, and the
      # sigstore-produced signatures and certificates.
      run: >-
        gh release upload
        "$GITHUB_REF_NAME" dist/**
        --repo "$GITHUB_REPOSITORY"