name: Build Wheels (Metal)

on: workflow_dispatch

permissions:
  contents: write

jobs:
  define_matrix:
    name: Define Build Matrix
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
    defaults:
      run:
        shell: pwsh

    steps:
      - name: Define Job Output
        id: set-matrix
        run: |
          $matrix = @{
              'os' = @('macos-11', 'macos-12', 'macos-13')
              'pyver' = @('3.10', '3.11', '3.12')
          }

          $matrixOut = ConvertTo-Json $matrix -Compress
          Write-Output ('matrix=' + $matrixOut) >> $env:GITHUB_OUTPUT

  build_wheels:
    name: ${{ matrix.os }} Python ${{ matrix.pyver }}
    needs: define_matrix
    runs-on: ${{ matrix.os }}
    strategy:
      matrix: ${{ fromJSON(needs.define_matrix.outputs.matrix) }}
    env:
      OSVER: ${{ matrix.os }}

    steps:
      - uses: actions/checkout@v4
        with:
          submodules: "recursive"

      - uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.pyver }}

      - name: Install Dependencies
        run: |
          python -m pip install build wheel cmake

      - name: Build Wheel
        run: |
          XCODE15PATH="/Applications/Xcode_15.0.app/Contents/Developer"
          XCODE15BINPATH="${XCODE15PATH}/Toolchains/XcodeDefault.xctoolchain/usr/bin"
          export CMAKE_ARGS="-DLLAMA_NATIVE=off -DLLAMA_METAL=on"
          [[ "$OSVER" == "macos-13" ]] && export CC="${XCODE15BINPATH}/cc" && export CXX="${XCODE15BINPATH}/c++" && export MACOSX_DEPLOYMENT_TARGET="13.0"
          [[ "$OSVER" == "macos-12" ]] && export MACOSX_DEPLOYMENT_TARGET="12.0"
          [[ "$OSVER" == "macos-11" ]] && export MACOSX_DEPLOYMENT_TARGET="11.0"

          export CMAKE_OSX_ARCHITECTURES="arm64" && export ARCHFLAGS="-arch arm64"
          VERBOSE=1 python -m build --wheel

          if [[ "$OSVER" == "macos-13" ]]; then
            export SDKROOT="${XCODE15PATH}/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.0.sdk"
            export MACOSX_DEPLOYMENT_TARGET="14.0"
            VERBOSE=1 python -m build --wheel
          fi

          for file in ./dist/*.whl; do cp "$file" "${file/arm64.whl/aarch64.whl}"; done

          export CMAKE_OSX_ARCHITECTURES="x86_64" && export CMAKE_ARGS="-DLLAMA_NATIVE=off -DLLAMA_AVX=off -DLLAMA_AVX2=off -DLLAMA_FMA=off -DLLAMA_F16C=off -DLLAMA_METAL=on" && export ARCHFLAGS="-arch x86_64"
          VERBOSE=1 python -m build --wheel

          if [[ "$OSVER" == "macos-13" ]]; then
            export SDKROOT="${XCODE15PATH}/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.0.sdk"
            export MACOSX_DEPLOYMENT_TARGET="14.0"
            VERBOSE=1 python -m build --wheel
          fi

      - uses: softprops/action-gh-release@v2
        with:
          files: dist/*
          # set release name to <tag>-metal
          tag_name: ${{ github.ref_name }}-metal
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}