build-matplotlib.yml

---
name: Build matplotlib wheels (riscv64)

on:
  workflow_dispatch:
    inputs:
      version:
        description: 'matplotlib version to build (git tag without leading v, e.g. 3.11.1)'
        required: true
        default: '3.11.1'
  pull_request:
    paths:
      - '.github/workflows/build-matplotlib.yml'
      - '.github/workflows/test-matplotlib.yml'

concurrency:
  group: ${{ github.workflow }}-${{ inputs.version || '3.11.1' }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

permissions:
  contents: read  # to fetch code (actions/checkout)

env:
  # `inputs.version` is empty on pull_request events; default there.
  MPL_VERSION: ${{ inputs.version || '3.11.1' }}
  # Query PyPI + gitlab riscv64 mirror; pick best compatible wheel
  # (`unsafe-best-match` = pip-like). Refuse sdist for dependencies so uv
  # selects the gitlab riscv64 wheel when PyPI lacks one instead of falling
  # back to a source build.
  UV_EXTRA_INDEX_URL: https://gitlab.com/api/v4/projects/riseproject%2Fpython%2Fwheel_builder/packages/pypi/simple
  UV_INDEX_STRATEGY: unsafe-best-match
  UV_ONLY_BINARY: ':all:'

jobs:
  build_sdist:
    name: Build matplotlib ${{ inputs.version || '3.11.1' }} sdist
    runs-on: ubuntu-24.04-riscv
    permissions:
      contents: read
    outputs:
      SDIST_NAME: ${{ steps.sdist.outputs.SDIST_NAME }}

    steps:
      - name: Checkout matplotlib v${{ env.MPL_VERSION }}
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
        with:
          repository: matplotlib/matplotlib
          ref: v${{ env.MPL_VERSION }}
          fetch-depth: 0
          persist-credentials: false

      - name: Checkout python-wheels
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
        with:
          path: python-wheels
          persist-credentials: false

      - name: Install Python
        uses: astral-sh/setup-uv@fac544c07dec837d0ccb6301d7b5580bf5edae39  # v8.2.0
        with:
          python-version: '3.12'
          activate-environment: true
          enable-cache: false

      # We need to patch the matplotlib source to increase a threading test
      # timeout for the native runners
      - name: patch matplotlib source
        run: |
          git apply python-wheels/patches/matplotlib/${{ env.MPL_VERSION }}/00*.patch

      # Something changed somewhere that prevents the downloaded-at-build-time
      # licenses from being included in built wheels, so pre-download them so
      # that they exist before the build and are included.
      - name: Pre-download bundled licenses
        run: >
          curl -Lo LICENSE/LICENSE_QHULL
          https://github.com/qhull/qhull/raw/2020.2/COPYING.txt

      - name: Install dependencies
        run: uv pip install build twine

      - name: Build sdist
        id: sdist
        run: |
          python -m build --sdist
          python ci/export_sdist_name.py

      - name: Check README rendering for PyPI
        run: twine check dist/*

      - name: Upload sdist result
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
        with:
          name: matplotlib-${{ env.MPL_VERSION }}-cibw-sdist
          path: dist/*.tar.gz
          if-no-files-found: error

  build_wheels:
    needs: build_sdist
    name: Build matplotlib ${{ inputs.version || '3.11.1' }} wheels for riscv64
    permissions:
      contents: read
    runs-on: ubuntu-24.04-riscv

    steps:
      - name: Checkout python-wheels
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
        with:
          path: python-wheels
          persist-credentials: false

      - name: Download sdist
        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c  # v8.0.1
        with:
          name: matplotlib-${{ env.MPL_VERSION }}-cibw-sdist
          path: dist/

      - name: Build wheels for CPython 3.14
        uses: pypa/cibuildwheel@8d2b08b68458a16aeb24b64e68a09ab1c8e82084  # v3.4.1
        with:
          package-dir: dist/${{ needs.build_sdist.outputs.SDIST_NAME }}
        env:
          CIBW_BUILD: "cp314-* cp314t-*"
          CIBW_ARCHS: "riscv64"
          # Skip musllinux: upstream matplotlib isn't building it either
          CIBW_SKIP: "*-musllinux_*"
          CIBW_BUILD_FRONTEND: "build[uv]"
          CIBW_ENVIRONMENT: >-
            UV_EXTRA_INDEX_URL=https://gitlab.com/api/v4/projects/riseproject%2Fpython%2Fwheel_builder/packages/pypi/simple
            UV_INDEX_STRATEGY=unsafe-best-match
            UV_ONLY_BINARY=:all:

      - name: Build wheels for CPython 3.13
        uses: pypa/cibuildwheel@8d2b08b68458a16aeb24b64e68a09ab1c8e82084  # v3.4.1
        with:
          package-dir: dist/${{ needs.build_sdist.outputs.SDIST_NAME }}
        env:
          CIBW_BUILD: "cp313-*"
          CIBW_ARCHS: "riscv64"
          # Skip musllinux: upstream matplotlib isn't building it either
          CIBW_SKIP: "*-musllinux_*"
          CIBW_BUILD_FRONTEND: "build[uv]"
          CIBW_ENVIRONMENT: >-
            UV_EXTRA_INDEX_URL=https://gitlab.com/api/v4/projects/riseproject%2Fpython%2Fwheel_builder/packages/pypi/simple
            UV_INDEX_STRATEGY=unsafe-best-match
            UV_ONLY_BINARY=:all:

      - name: Build wheels for CPython 3.12
        uses: pypa/cibuildwheel@8d2b08b68458a16aeb24b64e68a09ab1c8e82084  # v3.4.1
        with:
          package-dir: dist/${{ needs.build_sdist.outputs.SDIST_NAME }}
        env:
          CIBW_BUILD: "cp312-*"
          CIBW_ARCHS: "riscv64"
          # Skip musllinux: upstream matplotlib isn't building it either
          CIBW_SKIP: "*-musllinux_*"
          CIBW_BUILD_FRONTEND: "build[uv]"
          CIBW_ENVIRONMENT: >-
            UV_EXTRA_INDEX_URL=https://gitlab.com/api/v4/projects/riseproject%2Fpython%2Fwheel_builder/packages/pypi/simple
            UV_INDEX_STRATEGY=unsafe-best-match
            UV_ONLY_BINARY=:all:

      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
        with:
          name: matplotlib-${{ env.MPL_VERSION }}-cibw-wheels-riscv64
          path: ./wheelhouse/*.whl
          if-no-files-found: error

  publish:
    name: Publish matplotlib ${{ inputs.version || '3.11.1' }} to GitLab
    needs: build_wheels
    # Only publish when the workflow was triggered from main with a specific
    # version. Manual trigger is the only entry point that reaches main;
    # PR runs sit on refs/pull/<n>/merge and skip this job.
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write

    steps:
      - name: Publish wheels and open docs PR
        uses: riseproject-dev/python-wheels/actions/publish-wheels@main
        with:
          artifact-pattern: matplotlib-${{ env.MPL_VERSION }}-*-manylinux_riscv64
          gitlab-username: ${{ vars.GITLAB_DEPLOY_USER }}
          gitlab-token: ${{ secrets.GITLAB_DEPLOY_TOKEN }}
          gitlab-project-id: ${{ vars.GITLAB_PROJECT_ID }}
          gh-token: ${{ secrets.GITHUB_TOKEN }}