build-python.yml

name: Build Python

on:
  push:
    branches:
      - main
    paths:
      - '.github/workflows/build-python.yml'
      - 'src/**'
      - 'include/**'
      - 'example/**'
      - 'CMakeLists.txt'

jobs:
  build-linux:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          submodules: recursive

      - name: Install CMake
        run: sudo apt-get update && sudo apt-get install -y cmake

      - name: Determine CPU Cores
        id: cpu-info
        run: echo "CPU_CORES=$(nproc)" >> $GITHUB_ENV

      - name: Configure CMake
        run: cmake -B build -DCMAKE_BUILD_TYPE=Release

      - name: Build
        run: cmake --build build --config Release -- -j${{ env.CPU_CORES }}

      - name: Upload Build Artifacts
        uses: actions/upload-artifact@v3
        with:
          name: linux-x86_64
          path: |
            lib/

  build-macos:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [macos-13, macos-14]

    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          submodules: recursive
      
      - name: Install Homebrew
        run: /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

      - name: Update CMake
        run: brew install cmake

      - name: Determine CPU Cores
        id: cpu-info
        run: echo "CPU_CORES=$(sysctl -n hw.ncpu)" >> $GITHUB_ENV

      - name: Configure CMake
        run: cmake -B build -DCMAKE_BUILD_TYPE=Release

      - name: Build
        run: cmake --build build --config Release -- -j${{ env.CPU_CORES }}

      - name: Upload Build Artifacts
        uses: actions/upload-artifact@v3
        with:
          name: ${{ matrix.os == 'macos-13' && 'macos-x86_64' || 'macos-arm64' }}
          path: |
            lib/

  create-universal-dylibs:
    needs: build-macos
    runs-on: macos-latest
    steps:
      - name: Download x86_64 Build Artifacts
        uses: actions/download-artifact@v3
        with:
          name: macos-x86_64
          path: macos-x86_64

      - name: Download arm64 Build Artifacts
        uses: actions/download-artifact@v3
        with:
          name: macos-arm64
          path: macos-arm64

      - name: Create Universal dylibs
        run: |
          mkdir -p universal/lib
          for dylib in macos-x86_64/lib/*.dylib; do
            dylib_name=$(basename $dylib)
            lipo -create macos-x86_64/lib/$dylib_name macos-arm64/lib/$dylib_name -output universal/lib/$dylib_name
          done

      - name: Upload Universal dylibs
        uses: actions/upload-artifact@v3
        with:
          name: macos-universal
          path: universal/

  build-windows:
    runs-on: windows-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          submodules: recursive

      - name: Install CMake
        run: choco install -y cmake

      - name: Configure CMake
        run: cmake -B build -DCMAKE_BUILD_TYPE=Release

      - name: Build
        run: cmake --build build --config Release -- /m:4

      - name: Copy Everything from \build\Release\ to \lib
        run: xcopy /E /Y build\Release\ lib\

      - name: Upload Build Artifacts
        uses: actions/upload-artifact@v3
        with:
          name: windows-x86_64
          path: |
            lib/

  build-python:
    needs: 
        - build-linux
        - build-windows
        - create-universal-dylibs
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          submodules: recursive
    
      - name: Download Linux Build Artifacts
        uses: actions/download-artifact@v3
        with:
          name: linux-x86_64
          path: linux

      - name: Download Windows Build Artifacts
        uses: actions/download-artifact@v3
        with:
          name: windows-x86_64
          path: windows

      - name: Download macOS Universal Build Artifacts
        uses: actions/download-artifact@v3
        with:
          name: macos-universal
          path: macos

      - name: Create Build Directories
        run: |
            mkdir -p build/linux
            mkdir -p build/windows
            mkdir -p build/macos
            mkdir -p build/models

      - name: Copy Linux Build Artifacts
        run: cp -r linux/lib build/linux

      - name: Copy Windows Build Artifacts
        run: cp -r windows/lib build/windows

      - name: Copy macOS Universal Build Artifacts
        run: cp -r macos/lib build/macos

      - name: Copy Models
        run: cp -r models build/models

      - name: Copy Python Wrapper
        run: cp -r wrappers/babylon.py build

      - name: Upload Build Artifacts
        uses: actions/upload-artifact@v3
        with:
            name: python
            path: build/