build_cython.yml

name: Build Cython Extensions

on:
  push:
    paths:
      - 'retopoflow/cy/*.pyx'
      - 'cy_setup.py'
      - '.github/workflows/build_cython.yml'
  pull_request:
    paths:
      - 'retopoflow/cy/*.pyx'
      - 'cy_setup.py'
  workflow_dispatch:  # Allows manual triggering

jobs:
  build:
    name: Build on ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]
        python-version: ['3.11']

    steps:
    - uses: actions/checkout@v3

    - name: Set up Python
      uses: actions/setup-python@v4
      with:
        python-version: ${{ matrix.python-version }}

    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        python -m pip install cython numpy setuptools wheel

    - name: Build Cython extensions
      run: python cy_setup.py build_ext --inplace

    - name: Rename compiled extensions
      shell: bash
      run: |
        cd retopoflow/cy
        if [ "${{ matrix.os }}" == "windows-latest" ]; then
          echo "Windows build - keeping original name"
        elif [ "${{ matrix.os }}" == "macos-latest" ]; then
          mv rfmesh_visibility*.so rfmesh_visibility.cpython-311-darwin-$(uname -m).so
        elif [ "${{ matrix.os }}" == "ubuntu-latest" ]; then
          mv rfmesh_visibility*.so rfmesh_visibility.cpython-311-linux-$(uname -m).so
        fi

    - name: Upload compiled extension
      uses: actions/upload-artifact@v3
      with:
        name: compiled-extension-${{ matrix.os }}
        path: retopoflow/cy/rfmesh_visibility*.*
        retention-days: 7

  combine:
    needs: build
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3

    - name: Download all artifacts
      uses: actions/download-artifact@v3
      with:
        path: artifacts

    - name: Prepare release
      run: |
        mkdir -p release/retopoflow/cy
        # Only copy the compiled files (.so and .pyd), force overwrite with -f
        find artifacts -type f \( -name "*.so" -o -name "*.pyd" \) -exec cp -f {} release/retopoflow/cy/ \;

    - name: Create Release
      uses: softprops/action-gh-release@v1
      if: github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master'
      with:
        files: release/retopoflow/cy/*
        name: Cython Extensions ${{ github.sha }}
        tag_name: cython-build-${{ github.sha }}
        generate_release_notes: true
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}