build-wheels.yml

name: Build wheels

on:
  push:
    tags:
      - "v*"
  workflow_dispatch:

env:
  # VieCut's bundled tlx uses cmake_minimum_required(VERSION 2.8) which
  # CMake 4.x rejects. This env var tells CMake to accept older policies.
  CMAKE_ARGS: "-DCMAKE_POLICY_VERSION_MINIMUM=3.5"

jobs:
  build-linux:
    name: Linux ${{ matrix.manylinux_tag }} ${{ matrix.python-version }}
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        python-version: ["cp39", "cp310", "cp311", "cp312", "cp313", "cp314"]
        manylinux: ["quay.io/pypa/manylinux2014_x86_64", "manylinux_2_28"]
        include:
          - manylinux: "quay.io/pypa/manylinux2014_x86_64"
            manylinux_tag: manylinux_2_17
            before_all: >-
              yum install -y epel-release &&
              yum install -y hwloc-devel &&
              ln -sf /opt/python/cp312-cp312/bin/python3 /usr/local/bin/python3 &&
              bash {project}/scripts/build_mtkahypar.sh &&
              bash {project}/scripts/build_sharedmap_mtkahypar.sh
          - manylinux: manylinux_2_28
            manylinux_tag: manylinux_2_28
            before_all: >-
              yum install -y hwloc-devel &&
              bash {project}/scripts/build_mtkahypar.sh &&
              bash {project}/scripts/build_sharedmap_mtkahypar.sh
    steps:
      - uses: actions/checkout@v4
        with:
          submodules: recursive

      - uses: pypa/cibuildwheel@v3.3
        env:
          CIBW_BUILD: "${{ matrix.python-version }}-manylinux_x86_64"
          CIBW_SKIP: "cp31?t-*"
          CIBW_MANYLINUX_X86_64_IMAGE: ${{ matrix.manylinux }}
          CIBW_BEFORE_ALL: ${{ matrix.before_all }}
          CIBW_ENVIRONMENT: >-
            CXX=g++
            CMAKE_ARGS=-DCMAKE_POLICY_VERSION_MINIMUM=3.5
            LD_LIBRARY_PATH={project}/external_repositories/HeiCut/extern/mt-kahypar-library:{project}/external_repositories/HeiCut/extern/mt-kahypar-library/tbb_lib/intel64/gcc4.8:{project}/external_repositories/SharedMap/extern/local/mt-kahypar/lib:$LD_LIBRARY_PATH
          CIBW_TEST_REQUIRES: pytest
          CIBW_TEST_COMMAND: >-
            cp -r {project}/tests /tmp/_cibw_tests && pytest /tmp/_cibw_tests -v -s --tb=long && rm -rf /tmp/_cibw_tests
          CIBW_REPAIR_WHEEL_COMMAND: >-
            LD_LIBRARY_PATH={project}/external_repositories/HeiCut/extern/mt-kahypar-library:{project}/external_repositories/HeiCut/extern/mt-kahypar-library/tbb_lib/intel64/gcc4.8:{project}/external_repositories/SharedMap/extern/local/mt-kahypar/lib:$LD_LIBRARY_PATH
            auditwheel repair -w {dest_dir} {wheel}

      - uses: actions/upload-artifact@v4
        with:
          name: wheel-linux-${{ matrix.manylinux_tag }}-${{ matrix.python-version }}
          path: wheelhouse/*.whl

  build-macos-arm64:
    name: macOS arm64 ${{ matrix.python-version }}
    runs-on: macos-14
    strategy:
      fail-fast: false
      matrix:
        python-version: ["cp39", "cp310", "cp311", "cp312", "cp313", "cp314"]
    steps:
      - uses: actions/checkout@v4
        with:
          submodules: recursive

      - uses: pypa/cibuildwheel@v3.3
        env:
          CIBW_BUILD: "${{ matrix.python-version }}-macosx_arm64"
          CIBW_SKIP: "cp31?t-*"
          CIBW_BEFORE_ALL: >-
            brew install libomp hwloc tbb boost &&
            bash {project}/scripts/build_mtkahypar.sh &&
            bash {project}/scripts/build_sharedmap_mtkahypar.sh
          CIBW_ENVIRONMENT: >-
            CC=clang
            CXX=clang++
            MACOSX_DEPLOYMENT_TARGET=14.0
            OpenMP_ROOT=/opt/homebrew/opt/libomp
            CMAKE_ARGS="-DCMAKE_POLICY_VERSION_MINIMUM=3.5 -DOpenMP_ROOT=/opt/homebrew/opt/libomp"
            KAHYPAR_DOWNLOAD_TBB=OFF
            KAHYPAR_DOWNLOAD_BOOST=OFF
          CIBW_TEST_REQUIRES: pytest
          CIBW_TEST_COMMAND: >-
            cp -r {project}/tests /tmp/_cibw_tests && pytest /tmp/_cibw_tests -v -s --tb=long && rm -rf /tmp/_cibw_tests
          CIBW_REPAIR_WHEEL_COMMAND: >-
            DYLD_LIBRARY_PATH={project}/external_repositories/HeiCut/extern/mt-kahypar-library:{project}/external_repositories/SharedMap/extern/local/mt-kahypar/lib:$DYLD_LIBRARY_PATH
            delocate-wheel --require-archs arm64 -w {dest_dir} {wheel}

      - uses: actions/upload-artifact@v4
        with:
          name: wheel-macos-arm64-${{ matrix.python-version }}
          path: wheelhouse/*.whl

  # Windows builds are disabled: the bundled C++ graph algorithm libraries
  # (KaHIP, HeiStream, HyperMIS, etc.) rely on POSIX headers (sys/time.h,
  # sys/mman.h, execinfo.h) that are not available on MSVC/Windows.

  build-sdist:
    name: Source distribution
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          submodules: recursive

      - uses: actions/setup-python@v5
        with:
          python-version: "3.12"

      - run: pip install build
      - run: python -m build --sdist

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

  create-release:
    name: Create GitHub Release
    needs: [build-linux, build-macos-arm64, build-sdist]
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/download-artifact@v4
        with:
          path: dist
          merge-multiple: true

      - uses: softprops/action-gh-release@v2
        with:
          files: dist/*
          generate_release_notes: true