build_wheels.yml

name: Build Wheels

on:
  pull_request:
    paths:
      - "**.py"
      - "**.pxd"
      - "**.pyx"
      - "**"
  push:
    branches: [main]
  workflow_dispatch:

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

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

jobs:
  create_artifacts_folder:
    name: Create Artifacts Folder
    runs-on: ubuntu-latest
    outputs:
      artifacts_folder: ${{ steps.set_folder.outputs.folder_name }}

    steps:
      - name: Set Artifacts Folder
        id: set_folder
        run: echo "folder_name=artifacts/${{ github.run_id }}" >> $GITHUB_ENV

  build_wheels:
    name: Build wheels on ${{ matrix.os[1] }} - ${{ matrix.os[2] }} with Python ${{ matrix.python[0] }}
    runs-on: ${{ matrix.os[0] }}

    strategy:
      # Ensure that a wheel builder finishes even if another fails
      fail-fast: false
      matrix:
        os:  # see scipy wheels.yml GH actions
          - [ubuntu-22.04, manylinux, x86_64]
          - [macos-11, macosx, x86_64]
          # - [macos-12, macosx_*, arm64]
          - [windows-2019, win, AMD64]

        python: [["cp39", "3.9"], ["cp310", "3.10"], ["cp311", "3.11"], ["cp312", "3.12"]]
        # python[0] is used to specify the python versions made by cibuildwheel

    env:
      IS_32_BIT: ${{ matrix.os[2] == 'x86' }}

    steps:
      - name: Checkout scikit-tree
        uses: actions/checkout@v4

      - uses: actions/setup-python@v5
        with:
          python-version: "3.10"

      - name: Setup submodule
        run: |
          python -m pip install --upgrade pip spin
          python -m spin setup-submodule

      - name: win_amd64 - install rtools
        run: |
          choco install rtools -y --no-progress --force --version=4.0.0.20220206
          echo "c:\rtools40\ucrt64\bin;" >> $env:GITHUB_PATH
        if: ${{ runner.os == 'Windows' && env.IS_32_BIT == 'false' }}

      - name: Build wheels
        uses: pypa/cibuildwheel@v2.17.0
        # Build all wheels here, apart from macosx_arm64, linux_aarch64
        # cibuildwheel is currently unable to pass configuration flags to
        # CIBW_BUILD_FRONTEND https://github.com/pypa/cibuildwheel/issues/1227
        # (pip/build). Cross compilation with meson requires an initial
        # configuration step to create a build directory. The subsequent wheel
        # build then needs to use that directory. This can be done with pip
        # using a command like:
        # pip wheel --config-settings builddir=build .
        # if: >-
        #   ( ! contains(matrix.os[2], 'arm64' ) )
        env:
          CIBW_BUILD: ${{ matrix.python[0] }}-${{ matrix.os[1] }}*
          CIBW_ARCHS: ${{ matrix.os[2] }}
          CIBW_ENVIRONMENT_PASS_LINUX: RUNNER_OS

      - uses: actions/upload-artifact@v4
        with:
          path: ./wheelhouse/
          name: ${{ matrix.python[0] }}-${{ matrix.os[1] }}

  build-wheels-m1:
    name: Build wheels on Arm M1 with Python ${{ matrix.python[0] }}
    runs-on: macos-latest

    strategy:
      # Ensure that a wheel builder finishes even if another fails
      fail-fast: false
      matrix:
        python: [["cp39", "3.9"], ["cp310", "3.10"], ["cp311", "3.11"], ["cp312", "3.12"]]
        # python[0] is used to specify the python versions made by cibuildwheel

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.10"  # Replace with the desired Python version

      - name: Install cibuildwheel dependencies
        run: |
          pip install cibuildwheel
          pip install spin
          spin setup-submodule
          pip install .[build]

      - name: Build wheels
        uses: pypa/cibuildwheel@v2.17.0
        env:
          CIBW_BUILD: ${{ matrix.python[0] }}-macosx_arm64
          CIBW_ARCHS_MACOS: arm64

      - uses: actions/upload-artifact@v4
        with:
          path: ./wheelhouse
          name: ${{ matrix.python[0] }}-arm

  # Build the source distribution under Linux
  build_sdist:
    name: Source distribution
    runs-on: ubuntu-latest

    steps:
      - name: Checkout scikit-tree
        uses: actions/checkout@v4

      - name: Setup Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.10"  # update once build dependencies are available

      - name: Build source distribution
        run: |
          pip install spin build
          spin setup-submodule
          pip install .[build]
          python -m build

      - name: Store artifacts
        uses: actions/upload-artifact@v4
        with:
          path: dist/*.tar.gz

      - uses: actions/upload-artifact@v4
        with:
          path: dist
          name: ${{ matrix.python[0] }}-${{ matrix.os[1] }}