name: Build Wheels for PyPI
on:
  workflow_dispatch:
  push:
    # tags: ["yosys-*"]
jobs:
  build_wheels:
    strategy:
      matrix:
        os: [
            # You can't cross-compile on Linux, so might as well do the emulated
            # workload on its own
            {
              name: "Ubuntu 22.04",
              family: "linux",
              runner: "ubuntu-22.04",
              archs: "x86_64",
            },
            {
              name: "Ubuntu 22.04",
              family: "linux",
              runner: "ubuntu-22.04",
              archs: "aarch64",
            },
            # While you can cross-compile on macOS, this is less of a headache
            {
              name: "macOS 13",
              family: "macos",
              runner: "macos-13",
              archs: "x86_64",
            },
            {
              name: "macOS 14",
              family: "macos",
              runner: "macos-14",
              archs: "arm64",
            },
            # TODO: Make Windows Work
            # {
            #   name: "Windows Server 2019",
            #   family: "windows",
            #   runner: "windows-2019",
            #   archs: "AMD64 ARM64",
            # },
          ]
    name: Build Wheels | ${{ matrix.os.name }} | ${{ matrix.os.archs }}
    runs-on: ${{ matrix.os.runner }}
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0
          submodules: true
      - if: ${{ matrix.os.family == 'linux' }}
        name: "[Linux] Set up QEMU"
        uses: docker/setup-qemu-action@v2
      - uses: actions/setup-python@v3
      - name: Get Boost Source
        run: |
          mkdir -p boost
          curl -L https://sourceforge.net/projects/boost/files/boost/1.83.0/boost_1_83_0.tar.bz2 | tar --strip-components=1 -xjC boost
      - name: Seed Makefile.bak
        # For every sed, a .bak is created so it can be copied over Makefile to
        # rever the change for the next Python version to be built.
        #
        # This creates a .bak for the first Python version's cp to consume.
        run: |
          cp Makefile Makefile.bak
      - if: ${{ matrix.os.family == 'macos' }}
        name: "[macOS] Flex/Bison"
        run: |
          brew install flex bison
          echo "PATH=$(brew --prefix flex)/bin:$PATH" >> $GITHUB_ENV
          echo "PATH=$(brew --prefix bison)/bin:$PATH" >> $GITHUB_ENV
      - if: ${{ matrix.os.family == 'macos' && matrix.os.archs == 'arm64' }}
        name: "[macOS/arm64] Install Python 3.8 (see: https://cibuildwheel.pypa.io/en/stable/faq/#macos-building-cpython-38-wheels-on-arm64)"
        uses: actions/setup-python@v5
        with:
          python-version: 3.8
      - name: Build wheels
        uses: pypa/cibuildwheel@v2.20.0
        env:
          # Explaining the build steps:
          #   1. Revert previous seds (if any)
          #   2. Delete the libboost static archives from previous builds (if any)
          #   3. Navigate to boost source extracted in previous GHA step
          #   4-5. Build Boost against current version of Python, only for
          #        static linkage
          #        (Boost is statically linked because system boost packages
          #         wildly vary in versions, including the libboost_python3
          #         version)
          #   6-7. Return to package directory and sed the Makefile to point at
          #        the newly compiled libboost_python
          CIBW_SKIP: pp* # The Makefile requires python3-config which is not in pypy
          CIBW_ARCHS: ${{ matrix.os.archs }}
          CIBW_BUILD_VERBOSITY: "1"
          CIBW_BEFORE_ALL_LINUX: yum install -y libffi-devel flex bison || apk add libffi-dev flex bison
          CIBW_BEFORE_ALL_MAC: brew install libffi
          CIBW_BEFORE_BUILD: |
            cp Makefile.bak Makefile &&\
              cd ./boost &&\
              rm -rf ./pfx &&\
              ./bootstrap.sh --prefix=./pfx &&\
              ./b2 --prefix=./pfx --with-filesystem --with-system --with-python cxxflags="$(python3-config --includes) -std=c++17 -fPIC" cflags="$(python3-config --includes) -fPIC" link=static variant=release install &&\
              ls ./pfx/lib/libboost_python*.a &&\
              cd {package} &&\
              sed -i'.bak' -e "1i\\
                LINKFLAGS = -L./boost/pfx/lib" -e "1i\\
                CXXFLAGS = -I./boost/pfx/include" -e "s@BOOST_PYTHON_LIB ?=@BOOST_PYTHON_LIB = $(ls ./boost/pfx/lib/libboost_python*.a)\nTrash =@" Makefile
      - uses: actions/upload-artifact@v3
        with:
          path: ./dist/*.whl