ci.yml

name: Main
on:
  pull_request:
    branches: [master]
  push:
    branches: [master]
  release:
    types: [published]
  schedule:
    - cron: '30 20 * * *' # Warning: Timezone dep - 20:00 is 1:00

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
  cancel-in-progress: true

jobs:
  build:
    name: ${{ matrix.name }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - name: ubu22-x86-gcc12-clang-repl-19-cppyy
            os: ubuntu-22.04
            compiler: gcc-12
            clang-runtime: '19'
            cling: Off
            cppyy: On
          - name: ubu22-x86-gcc12-clang-repl-18-cppyy
            os: ubuntu-22.04
            compiler: gcc-12
            clang-runtime: '18'
            cling: Off
            cppyy: On
          - name: ubu22-x86-gcc12-clang-repl-17-cppyy
            os: ubuntu-22.04
            compiler: gcc-12
            clang-runtime: '17'
            cling: Off
            cppyy: On
          - name: ubu22-x86-gcc9-clang-repl-16-cppyy
            os: ubuntu-22.04
            compiler: gcc-9
            clang-runtime: '16'
            cling: Off
            cppyy: On
          - name: ubu22-x86-gcc9-clang13-cling-cppyy
            os: ubuntu-22.04
            compiler: gcc-9
            clang-runtime: '13'
            cling: On
            cling-version: '1.0'
            cppyy: On
          #Commented out until CppInterOp passes all tests on Windows
          #- name: win2022-msvc-clang-repl-17-cppyy
          #  os: windows-2022
          #  compiler: msvc
          #  clang-runtime: '17'
          #  cling: Off
          #  cppyy: On
          #- name: win2022-msvc-clang-repl-16-cppyy
          #  os: windows-2022
          #  compiler: msvc
          #  clang-runtime: '16'
          #  cling: Off
          #  cppyy: On
          #- name: win2022-msvc-cling-cppyy
          #  os: windows-2022
          #  compiler: msvc
          #  clang-runtime: '13'
          #  cling: On
          #  cling-version: '1.0'
          #  cppyy: On
          - name: osx13-x86-clang-clang-repl-19-cppyy
            os: macos-13
            compiler: clang
            clang-runtime: '19'
            cling: Off
            cppyy: On
          - name: osx13-x86-clang-clang-repl-18-cppyy
            os: macos-13
            compiler: clang
            clang-runtime: '18'
            cling: Off
            cppyy: On
          - name: osx13-x86-clang-clang-repl-17-cppyy
            os: macos-13
            compiler: clang
            clang-runtime: '17'
            cling: Off
            cppyy: On
          - name: osx13-x86-clang-clang-repl-16-cppyy
            os: macos-13
            compiler: clang
            clang-runtime: '16'
            cling: Off
            cppyy: On
          - name: osx13-x86-clang-clang13-cling-cppyy
            os: macos-13
            compiler: clang
            clang-runtime: '13'
            cling: On
            cling-version: '1.0'
            cppyy: On
          - name: osx14-arm-clang-clang-repl-18-cppyy
            os: macos-14
            compiler: clang
            clang-runtime: '19'
            cling: Off
            cppyy: On
          - name: osx14-arm-clang-clang-repl-18-cppyy
            os: macos-14
            compiler: clang
            clang-runtime: '18'
            cling: Off
            cppyy: On
          - name: osx14-arm-clang-clang-repl-17-cppyy
            os: macos-14
            compiler: clang
            clang-runtime: '17'
            cling: Off
            cppyy: On
          - name: osx14-arm-clang-clang-repl-16-cppyy
            os: macos-14
            compiler: clang
            clang-runtime: '16'
            cling: Off
            cppyy: On
          - name: osx14-arm-clang-clang13-cling-cppyy
            os: macos-14
            compiler: clang
            clang-runtime: '13'
            cling: On
            cling-version: '1.0'
            cppyy: On

    steps:
    - uses: actions/checkout@v4
      with:
        fetch-depth: 0
    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: '3.11'

    - name: Save PR Info on Unix systems
      if: ${{ runner.os != 'windows' }}
      run: |
        mkdir -p ./pr
        echo ${{ github.event.number }} > ./pr/NR
        echo ${{ github.repository }} > ./pr/REPO

        cling_on=$(echo "${{ matrix.cling }}" | tr '[:lower:]' '[:upper:]')
        if [[ "$cling_on" == "ON" ]]; then
          export CLING_HASH=$(git ls-remote https://github.com/root-project/cling.git refs/tags/v${{ matrix.cling-version }} | tr '\t' '-')
          export LLVM_HASH=$(git ls-remote https://github.com/root-project/llvm-project.git cling-llvm${{ matrix.clang-runtime}} | tr '\t' '-')
        else
          export CLING_HASH="Repl"
          # May need to revert back to both having same llvm_hash, as below cause llvm to be rebuilt everytime commit is made to llvm/llvm-project for release a.x
          # which could be quite often for new releases
          export LLVM_HASH=$(git ls-remote https://github.com/llvm/llvm-project.git refs/heads/release/${{ matrix.clang-runtime}}.x | tr '\t' '-')
        fi

        echo "CLING_HASH=$CLING_HASH" >> $GITHUB_ENV
        echo "LLVM_HASH=$LLVM_HASH" >> $GITHUB_ENV

    - name: Save PR Info on Windows systems
      if: ${{ runner.os == 'windows' }}
      run: |
        mkdir  ./pr
        echo "${{ github.event.number }}" > ./pr/NR
        echo ${{ github.repository }} > ./pr/REPO

        if ( "${{ matrix.cling }}" -imatch "On" )
        { 
          $env:CLING_HASH_TEMP = ( git ls-remote https://github.com/root-project/cling.git refs/tags/v${{ matrix.cling-version }} ) 
          $env:CLING_HASH = $env:CLING_HASH_TEMP -replace "\t","-"
        }
        else
        {
          $env:CLING_HASH="Repl"
          # May need to revert back to both having same llvm_hash, as below cause llvm to be rebuilt everytime commit is made to llvm/llvm-project for release a.x
          # which could be quite often for new releases
          $env:LLVM_HASH_TEMP = (git ls-remote https://github.com/llvm/llvm-project.git refs/heads/release/${{ matrix.clang-runtime}}.x )
          $env:LLVM_HASH = $env:LLVM_HASH_TEMP -replace "\t","-"
        }

        echo "CLING_HASH=$env:CLING_HASH"
        echo "LLVM_HASH=$env:LLVM_HASH"
        
        echo "CLING_HASH=$env:CLING_HASH" >> $GITHUB_ENV
        echo "LLVM_HASH=$env:LLVM_HASH" >> $GITHUB_ENV

    - name: Setup default Build Type on *nux
      if: runner.os != 'windows'
      run: |
        echo "BUILD_TYPE=Release" >> $GITHUB_ENV
        echo "CACHE=OFF" >> $GITHUB_ENV
        os="${{ matrix.os }}"
        if [[ "${os}" == "macos"* ]]; then
          echo "ncpus=$(sysctl -n hw.ncpu)" >> $GITHUB_ENV
        else
          echo "ncpus=$(nproc --all)" >> $GITHUB_ENV
        fi

    - name: Setup default Build Type on Windows
      if: runner.os == 'windows'
      run: |
        echo "BUILD_TYPE=Release" >> $env:GITHUB_ENV
        echo "CACHE=OFF" >> $env:GITHUB_ENV
        echo "ncpus=%NUMBER_OF_PROCESSORS%" 
        echo "ncpus=%NUMBER_OF_PROCESSORS%" >> $GITHUB_ENV

    - name: Setup compiler on Linux
      if: runner.os == 'Linux'
      run: |
        # https://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html
        vers="${compiler#*-}"
        os_codename="`cat /etc/os-release | grep UBUNTU_CODENAME | cut -d = -f 2`"
        ##sudo apt update
        if [[ "${{ matrix.compiler }}" == *"gcc"* ]]; then
          sudo apt install -y gcc-${vers} g++-${vers} lld
          echo "CC=gcc-${vers}" >> $GITHUB_ENV
          echo "CXX=g++-${vers}" >> $GITHUB_ENV
        else
          if ! sudo apt install -y clang-${vers}; then
            curl https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
            echo "deb https://apt.llvm.org/${os_codename}/ llvm-toolchain-${os_codename}-${vers} main" | sudo tee -a /etc/apt/sources.list
            sudo apt update
            sudo apt install -y clang-${vers}
          fi
          echo "CC=clang-${vers}" >> $GITHUB_ENV
          echo "CXX=clang++-${vers}" >> $GITHUB_ENV
        fi
     
      env:
        compiler: ${{ matrix.compiler }}

    - name: Setup compiler on macOS
      if: runner.os == 'macOS'
      run: |
        vers="${compiler#*-}"
        if [[ "${{ matrix.compiler }}" == *"gcc"* ]]; then
          brew install "gcc@$vers"
          echo "CC=gcc-${vers}" >> $GITHUB_ENV
          echo "CXX=g++-${vers}" >> $GITHUB_ENV
        else
          echo "SDKROOT=$(xcrun --sdk macosx --show-sdk-path)" >> $GITHUB_ENV
          #Use clang-15 and clang++-15 compiler that is installed on runner, instead of one
          #provided by MacOS (could brew install clang-16/17 to use consistent version
          #of clang)
          echo "CC=$(brew --prefix llvm@15)/bin/clang" >> $GITHUB_ENV
          echo "CXX=$(brew --prefix llvm@15)/bin/clang++" >> $GITHUB_ENV
        fi
      env:
        compiler: ${{ matrix.compiler }}
        
    #Section slightly modified version of
    #https://github.com/vgvassilev/clad/blob/40d8bec11bde47b14a281078183a4f6147abeac5/.github/workflows/ci.yml#L510C1-L534C10
    - name: Setup compiler on Windows
      if: runner.os == 'windows'
      run: |
        if ( "${{ matrix.compiler }}" -imatch "clang" )
        {
          $ver="${{ matrix.compiler }}".split("-")[1]
          choco install llvm --version=$ver --no-progress -my
          clang --version
          #
          $env:CC="clang"
          $env:CXX="clang++"
          echo "CC=clang" >> $env:GITHUB_ENV
          echo "CXX=clang++" >> $env:GITHUB_ENV
        }
        elseif ( "${{ matrix.compiler }}" -imatch "msvc" )
        {
          # MSVC is builtin in container image
        }
        else
        {
          echo "Unsupported compiler - fix YAML file"
        }

    - name: Install deps on Linux
      if: runner.os == 'Linux'
      run: |
        # Install deps
        sudo apt-get update
        sudo apt-get install git g++ debhelper devscripts gnupg python3
        sudo apt-get install -y libc6-dbg
        sudo snap install valgrind --classic

        # Install libraries used by the cppyy test suite
        sudo apt install libeigen3-dev
        sudo apt install libboost-all-dev
        
        conda install -y -q -c conda-forge \
          distro \
          pytest

    - name: Install deps on MacOS
      if: runner.os == 'macOS'
      run: |
        brew update
        brew remove ruby@3.0
        # workaround for https://github.com/actions/setup-python/issues/577
        for pkg in $(brew list | grep '^python@'); do
          brew unlink "$pkg"
          brew link --overwrite "$pkg"
        done
        brew upgrade
        pip install distro pytest

    - name: Restore Cache LLVM/Clang runtime build directory
      uses: actions/cache/restore@v4
      id: cache
      with:
        path: |
          llvm-project
          ${{ matrix.cling=='On' && 'cling' || '' }}
        key: ${{ env.CLING_HASH }}-${{ runner.os }}-${{ matrix.os }}-${{ matrix.compiler }}-clang-${{ matrix.clang-runtime }}.x-patch-${{ hashFiles(format('patches/llvm/clang{0}-*.patch', matrix.clang-runtime)) || 'none' }}
    #FIXME: Must be a way to use absolute path in restore to avoid this
    - name: Move llvm-project to top level directory Unix
      if: ${{ runner.os != 'windows' && steps.cache.outputs.cache-hit == 'true' }}
      run: |
        mv ./llvm-project/ ../
        echo "CACHE=ON" >> $GITHUB_ENV
        

    - name: Move llvm-project to top level directory
      if: ${{ runner.os == 'windows' && steps.cache.outputs.cache-hit == 'true' }}
      run: |
        mv .\llvm-project\ ..\
        echo "CACHE=ON" >> $env:GITHUB_ENV

    - name: Build LLVM/Cling on Unix systems if the cache is invalid
      if: ${{ runner.os != 'windows' && steps.cache.outputs.cache-hit != 'true' }}
      run: |
        cd ..
        cling_on=$(echo "${{ matrix.cling }}" | tr '[:lower:]' '[:upper:]')
        if [[ "${cling_on}" == "ON" ]]; then
          git clone https://github.com/root-project/cling.git
          cd ./cling 
          git checkout tags/v${{ matrix.cling-version }}
          cd ..
          git clone --depth=1 -b cling-llvm${{ matrix.clang-runtime }} https://github.com/root-project/llvm-project.git
        else # repl
          git clone --depth=1 -b release/${{ matrix.clang-runtime }}.x https://github.com/llvm/llvm-project.git
        fi
        cd llvm-project
        # Build
        mkdir build
        if [[ "${cling_on}" == "ON" ]]; then
          cd build
          cmake -DLLVM_ENABLE_PROJECTS=clang                  \
                -DLLVM_EXTERNAL_PROJECTS=cling                \
                -DLLVM_EXTERNAL_CLING_SOURCE_DIR=../../cling  \
                -DLLVM_TARGETS_TO_BUILD="host;NVPTX"          \
                -DCMAKE_BUILD_TYPE=Release                    \
                -DLLVM_ENABLE_ASSERTIONS=ON                   \
                -DLLVM_ENABLE_LLD=ON                          \
                -DCLANG_ENABLE_STATIC_ANALYZER=OFF            \
                -DCLANG_ENABLE_ARCMT=OFF                      \
                -DCLANG_ENABLE_FORMAT=OFF                     \
                -DCLANG_ENABLE_BOOTSTRAP=OFF                  \
                ../llvm
          cmake --build . --target clang --parallel ${{ env.ncpus }}
          cmake --build . --target cling --parallel ${{ env.ncpus }}
          # Now build gtest.a and gtest_main for CppInterOp to run its tests.
          cmake --build . --target gtest_main --parallel ${{ env.ncpus }}
        else
         # Apply patches
          llvm_vers=$(echo "${{ matrix.clang-runtime }}" | tr '[:lower:]' '[:upper:]')
          if [[ "${llvm_vers}" == "16" ]]||[[ "${llvm_vers}" == "17" ]]; then
            git apply -v ../patches/llvm/clang${{ matrix.clang-runtime }}-*.patch
            echo "Apply clang${{ matrix.clang-runtime }}-*.patch patches:"
          fi
          cd build
          cmake -DLLVM_ENABLE_PROJECTS=clang                  \
                -DLLVM_TARGETS_TO_BUILD="host;NVPTX"          \
                -DCMAKE_BUILD_TYPE=Release                    \
                -DLLVM_ENABLE_ASSERTIONS=ON                   \
                -DLLVM_ENABLE_LLD=ON                          \
                -DCLANG_ENABLE_STATIC_ANALYZER=OFF            \
                -DCLANG_ENABLE_ARCMT=OFF                      \
                -DCLANG_ENABLE_FORMAT=OFF                     \
                -DCLANG_ENABLE_BOOTSTRAP=OFF                  \
                ../llvm
          cmake --build . --target clang clang-repl --parallel ${{ env.ncpus }}
        fi
        cd ../../
        mkdir ./cppyy-backend/llvm-project/
        #FIXME: Avoid copy command by caching based on absolute path
        cp -r ./llvm-project/* ./cppyy-backend/llvm-project/
        echo "Copy llvm-project folder to cppyy-backend for caching"

    - name: Build LLVM/Cling on Windows systems if the cache is invalid
      if: ${{ runner.os == 'windows' && steps.cache.outputs.cache-hit != 'true' }}
      run: |
        cd ..
        if ( "${{ matrix.cling }}" -imatch "On" )
        {
          git clone https://github.com/root-project/cling.git
          cd ./cling 
          git checkout tags/v${{ matrix.cling-version }}
          cd ..
          git clone --depth=1 -b cling-llvm${{ matrix.clang-runtime }} https://github.com/root-project/llvm-project.git
          $env:PWD_DIR= $PWD.Path
          $env:CLING_DIR="$env:PWD_DIR\cling"
          echo "CLING_DIR=$env:CLING_DIR"
        }
        else
        {
          git clone --depth=1 -b release/${{ matrix.clang-runtime }}.x https://github.com/llvm/llvm-project.git
        }

        cd llvm-project
        # Build
        mkdir build
        if ( "${{ matrix.cling }}" -imatch "On" )
        {
          cd build
          cmake -DLLVM_ENABLE_PROJECTS=clang                  `
                -DLLVM_EXTERNAL_PROJECTS=cling                `
                -DLLVM_EXTERNAL_CLING_SOURCE_DIR="$env:CLING_DIR"   `
                -DLLVM_TARGETS_TO_BUILD="host;NVPTX"          `
                -DCMAKE_BUILD_TYPE=Release                    `
                -DLLVM_ENABLE_ASSERTIONS=ON                   `
                -DLLVM_ENABLE_LLD=ON                          `
                -DCLANG_ENABLE_STATIC_ANALYZER=OFF            `
                -DCLANG_ENABLE_ARCMT=OFF                      `
                -DCLANG_ENABLE_FORMAT=OFF                     `
                -DCLANG_ENABLE_BOOTSTRAP=OFF                  `
                ../llvm
          cmake --build . --config Release --target clang --parallel ${{ env.ncpus }}
          cmake --build . --config Release --target cling --parallel ${{ env.ncpus }}
          # Now build gtest.a and gtest_main for CppInterOp to run its tests.
          cmake --build . --config Release --target gtest_main --parallel ${{ env.ncpus }}
        }
        else
        {
          cp -r ..\patches\llvm\clang${{ matrix.clang-runtime }}*
          #FIXME: Apply patches without hardcoding
          if ( "${{ matrix.clang-runtime }}" -imatch "16" )
          {
            git apply -v clang16-1-Value.patch
            git apply -v clang16-2-CUDA.patch
            git apply -v clang16-3-WeakRef.patch
          }
          elseif ( "${{ matrix.clang-runtime }}" -imatch "16" )
          {
            git apply -v clang17-1-NewOperator.patch
          }
          cd build
          echo "Apply clang${{ matrix.clang-runtime }}-*.patch patches:"
          cmake -DLLVM_ENABLE_PROJECTS=clang                  `
                -DLLVM_TARGETS_TO_BUILD="host;NVPTX"          `
                -DCMAKE_BUILD_TYPE=Release                    `
                -DLLVM_ENABLE_ASSERTIONS=ON                   `
                -DLLVM_ENABLE_LLD=ON                          `
                -DCLANG_ENABLE_STATIC_ANALYZER=OFF            `
                -DCLANG_ENABLE_ARCMT=OFF                      `
                -DCLANG_ENABLE_FORMAT=OFF                     `
                -DCLANG_ENABLE_BOOTSTRAP=OFF                  `
                ../llvm
          cmake --build . --config Release --target clang clang-repl --parallel ${{ env.ncpus }}
        }
        cd ../../
        mkdir .\cppyy-backend\llvm-project\
        cp -r .\llvm-project\ .\cppyy-backend\
        echo "Copy llvm-project folder to cppyy-backend for caching"

    - name: Save Cache LLVM/Clang runtime build directory
      uses: actions/cache/save@v4
      if: ${{ steps.cache.outputs.cache-hit != 'true' }}
      with:
        path: |
          llvm-project
          ${{ matrix.cling=='On' && 'cling' || '' }}
        key: ${{ steps.cache.outputs.cache-primary-key }}

    - name: Build and Test/Install CppInterOp on Unix systems
      if: ${{ runner.os != 'windows' }}
      run: |
        cd ..
        git clone --depth=1 https://github.com/compiler-research/CppInterOp.git
        LLVM_DIR="$(pwd)/llvm-project"
        LLVM_BUILD_DIR="$(pwd)/llvm-project/build"
        cling_on=$(echo "${{ matrix.cling }}" | tr '[:lower:]' '[:upper:]')
        if [[ "${cling_on}" == "ON" ]]; then

          #FIXME: Currently Cling directory not found if using cache, so cloning again, until reason why is found.
          if [[ $CACHE == "ON" ]]; then
            echo "Cling folder not found. Cloning again."
            git clone https://github.com/root-project/cling.git
            cd ./cling/
            git checkout tags/v1.0
            cd ..
          fi
          
          CLING_DIR="$(pwd)/cling"
          CLING_BUILD_DIR="$(pwd)/cling/build"
          CPLUS_INCLUDE_PATH="${CLING_DIR}/tools/cling/include:${CLING_BUILD_DIR}/include:${LLVM_DIR}/llvm/include:${LLVM_DIR}/clang/include:${LLVM_BUILD_DIR}/include:${LLVM_BUILD_DIR}/tools/clang/include:$PWD/include"
        else
          CPLUS_INCLUDE_PATH="${LLVM_DIR}/llvm/include:${LLVM_DIR}/clang/include:${LLVM_BUILD_DIR}/include:${LLVM_BUILD_DIR}/tools/clang/include:$PWD/include"
        fi

        export CB_PYTHON_DIR="$PWD/cppyy-backend/python"
        export CPPINTEROP_DIR="$CB_PYTHON_DIR/cppyy_backend"

        # Build CppInterOp next to cling and llvm-project.
        mkdir CppInterOp/build 
        cd CppInterOp/build
        export CPPINTEROP_BUILD_DIR=$PWD
        cling_on=$(echo "${{ matrix.cling }}" | tr '[:lower:]' '[:upper:]')
        if [[ "${cling_on}" == "ON" ]]; then
          cmake -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }}        \
                -DUSE_CLING=ON                                  \
                -DUSE_REPL=OFF                                  \
                -DCling_DIR=$LLVM_BUILD_DIR/tools/cling         \
                -DLLVM_DIR=$LLVM_BUILD_DIR/lib/cmake/llvm       \
                -DClang_DIR=$LLVM_BUILD_DIR/lib/cmake/clang     \
                -DBUILD_SHARED_LIBS=ON                          \
                -DCMAKE_INSTALL_PREFIX=$CPPINTEROP_DIR          \
                ../
        else
          cmake -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }}    \
                -DUSE_CLING=OFF                             \
                -DUSE_REPL=ON                               \
                -DLLVM_DIR=$LLVM_BUILD_DIR/lib/cmake/llvm       \
                -DClang_DIR=$LLVM_BUILD_DIR/lib/cmake/clang     \
                -DBUILD_SHARED_LIBS=ON                      \
                -DCMAKE_INSTALL_PREFIX=$CPPINTEROP_DIR      \
                ../
        fi
        os="${{ matrix.os }}"
        cmake --build . --target check-cppinterop --parallel ${{ env.ncpus }}
        cppyy_on=$(echo "${{ matrix.cppyy }}" | tr '[:lower:]' '[:upper:]')
        if [[ ("${cppyy_on}" != "ON") && ("${os}" == "ubuntu"*) ]]; then
          # TODO: Remove "|| true" when fix memory issues in LLVM/Clang 17
          valgrind --track-origins=yes --error-exitcode=1 unittests/CppInterOp/CppInterOpTests 2>&1 >/dev/null || true
        fi
        cd ../..
        # We need CB_PYTHON_DIR later
        echo "CB_PYTHON_DIR=$CB_PYTHON_DIR" >> $GITHUB_ENV
        # We need CPPINTEROP_DIR, LLVM_BUILD_DIR and CPLUS_INCLUDE_PATH later
        echo "CPPINTEROP_BUILD_DIR=$CPPINTEROP_BUILD_DIR" >> $GITHUB_ENV
        echo "CPPINTEROP_DIR=$CPPINTEROP_DIR" >> $GITHUB_ENV
        echo "LLVM_BUILD_DIR=$LLVM_BUILD_DIR" >> $GITHUB_ENV
        echo "CPLUS_INCLUDE_PATH=$CPLUS_INCLUDE_PATH" >> $GITHUB_ENV

    - name: Build and Test/Install CppInterOp on Windows systems
      if: ${{ runner.os == 'windows' }}
      run: |
        cd ..
        git clone --depth=1 https://github.com/compiler-research/CppInterOp.git
        $env:PWD_DIR= $PWD.Path
        
        $env:LLVM_DIR="$env:PWD_DIR\llvm-project"
        echo "LLVM_DIR=$env:LLVM_DIR"
        echo "LLVM_DIR=$env:LLVM_DIR" >> $env:GITHUB_ENV

        $env:LLVM_BUILD_DIR="$env:PWD_DIR\llvm-project\build"
        echo "LLVM_BUILD_DIR=$env:LLVM_BUILD_DIR"
        echo "LLVM_BUILD_DIR=$env:LLVM_BUILD_DIR" >> $env:GITHUB_ENV
        
        if ( "${{ matrix.cling }}" -imatch "On" )
        {
          $env:CLING_DIR="$env:PWD_DIR\cling"
          echo "CLING_DIR=$env:CLING_DIR"
          echo "CLING_DIR=$env:CLING_DIR" >> $env:GITHUB_ENV   
          
          $env:CLING_BUILD_DIR="$env:PWD_DIR\cling\build"
          echo "CLING_BUILD_DIR=$env:CLING_BUILD_DIR"
          echo "CLING_BUILD_DIR=$env:CLING_BUILD_DIR" >> $env:GITHUB_ENV   
      
          $env:CPLUS_INCLUDE_PATH="$env:CLING_DIR\tools\cling\include;$env:CLING_BUILD_DIR\include;$env:LLVM_DIR\llvm\include;$env:LLVM_DIR\clang\include;$env:LLVM_BUILD_DIR\include;$env:LLVM_BUILD_DIR\tools\clang\include;$env:PWD_DIR\include;"
          echo "CPLUS_INCLUDE_PATH=$env:CPLUS_INCLUDE_PATH"
          echo "CPLUS_INCLUDE_PATH=$env:CPLUS_INCLUDE_PATH" >> $env:GITHUB_ENV   
        }
        else
        {
          $env:CPLUS_INCLUDE_PATH="$env:LLVM_DIR\llvm\include;$env:LLVM_DIR\clang\include;$env:LLVM_BUILD_DIR\include;$env:LLVM_BUILD_DIR\tools\clang\include;$env:PWD_DIR\include;"
          echo "CPLUS_INCLUDE_PATH=$env:CPLUS_INCLUDE_PATH"
          echo "CPLUS_INCLUDE_PATH=$env:CPLUS_INCLUDE_PATH" >> $env:GITHUB_ENV   
        }
        
        $env:CB_PYTHON_DIR="$env:PWD_DIR\cppyy-backend\python"
        echo "CB_PYTHON_DIR=$env:CB_PYTHON_DIR"
        echo "CB_PYTHON_DIR=$env:CB_PYTHON_DIR" >> $env:GITHUB_ENV  

        $env:CPPINTEROP_DIR="$env:CB_PYTHON_DIR\cppyy-backend"
        echo "CPPINTEROP_DIR=$env:CPPINTEROP_DIR"
        echo "CPPINTEROP_DIR=$env:CPPINTEROP_DIR" >> $env:GITHUB_ENV  

        # Build CppInterOp next to cling and llvm-project.
        mkdir CppInterOp\build 
        cd CppInterOp\build
        $env:CPPINTEROP_BUILD_DIR="$env:PWD_DIR"
        echo "CPPINTEROP_BUILD_DIR=$env:CPPINTEROP_BUILD_DIR"
        echo "CPPINTEROP_BUILD_DIR=$env:CPPINTEROP_BUILD_DIR" >> $env:GITHUB_ENV  
        if ( "${{ matrix.cling }}" -imatch "On" )
        {
          cmake -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }}    `
                -DUSE_CLING=ON                                  `
                -DUSE_REPL=OFF                                  `
                -DCling_DIR="$env:LLVM_BUILD_DIR\tools\cling"   `
                -DLLVM_DIR="$env:LLVM_BUILD_DIR" `
                -DClang_DIR="$env:LLVM_BUILD_DIR"  -DCMAKE_INSTALL_PREFIX="$env:CPPINTEROP_DIR"  ..\
        }
        else
        {
          cmake -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }}    `
                -DUSE_CLING=OFF                             `
                -DUSE_REPL=ON                               `
                -DLLVM_DIR="$env:LLVM_BUILD_DIR\lib\cmake\llvm"  `
                -DClang_DIR="$env:LLVM_BUILD_DIR\lib\cmake\clang"   -DCMAKE_INSTALL_PREFIX="$env:CPPINTEROP_DIR"  ..\
        }
        cmake --build . --config ${{ env.BUILD_TYPE }} --target check-cppinterop --parallel ${{ env.ncpus }}
        cd ..\..

    - name: Build and Install cppyy-backend on Unix Systems
      if: ${{ (runner.os != 'windows') && (matrix.cppyy == 'On') }}
      run: |
        mkdir -p $CPPINTEROP_DIR/lib build && cd build
        # Install CppInterOp
        (cd $CPPINTEROP_BUILD_DIR && cmake --build . --target install --parallel $(nproc --all))
        # Build and Install cppyy-backend
        cmake -DCppInterOp_DIR=$CPPINTEROP_DIR ..
        cmake --build . --parallel $(nproc --all)
        OS=$(uname -s)
        if [[ "$OS" == "Darwin" ]]; then
          cp libcppyy-backend.dylib $CPPINTEROP_DIR/lib/
        else
          cp libcppyy-backend.so $CPPINTEROP_DIR/lib/
        fi
        cd ..
        
    - name: Install CPyCppyy on Unix Systems
      if: ${{ (runner.os != 'windows') && (matrix.cppyy == 'On') }}
      run: |
        cd ..
        # Setup virtual environment
        python3 -m venv .venv
        source .venv/bin/activate
        # Install CPyCppyy
        git clone --depth=1 https://github.com/compiler-research/CPyCppyy.git
        mkdir CPyCppyy/build
        cd CPyCppyy/build
        cmake ..
        cmake --build . --parallel $(nproc --all)
        #
        export CPYCPPYY_DIR=$PWD
        cd ../..
        # We need CPYCPPYY_DIR later
        echo "CPYCPPYY_DIR=$CPYCPPYY_DIR" >> $GITHUB_ENV
    - name: Install cppyy on Unix Systems
      if: ${{ (runner.os != 'windows') && (matrix.cppyy == 'On') }}
      run: |
        cd ..
        # source virtual environment
        source .venv/bin/activate
        # Install cppyy
        git clone --depth=1 https://github.com/compiler-research/cppyy.git
        cd cppyy
        python -m pip install --upgrade . --no-deps
        cd ..
    - name: Run cppyy on Unix Systems
      if: ${{ (runner.os != 'windows') && (matrix.cppyy == 'On') }}
      run: |
        cd ..
        # Run cppyy
        source .venv/bin/activate
        export PYTHONPATH=$PYTHONPATH:$CPYCPPYY_DIR:$CB_PYTHON_DIR
        python -c "import cppyy"
        # We need PYTHONPATH later
        echo "PYTHONPATH=$PYTHONPATH" >> $GITHUB_ENV
    - name: Run the tests on Unix Systems
      if: ${{ (runner.os != 'windows') && (matrix.cppyy == 'On') }}
      run: |
        cd ..
        # Run the tests
        source .venv/bin/activate
        cd cppyy/test
        echo ::group::Prepare For Testing
        make all
        python -m pip install --upgrade pip
        python -m pip install pytest
        python -m pip install pytest-xdist
        python -m pip install numba
        echo ::endgroup::

        echo ::group::Run complete test suite
        set -o pipefail
        python -m pytest -sv | tee complete_testrun.log 2>&1
        set +o pipefail
        echo ::endgroup::

        echo ::group::Crashing Test Logs
        # See if we don't have a crash that went away
        # Comment out all xfails but the ones that have a run=False condition.
        find . -name "*.py" -exec sed -i '/run=False/!s/^ *@mark.xfail\(.*\)/#&/' {} \;
        python -m pytest -n 1 -m "xfail" --runxfail -sv --max-worker-restart 512 | tee test_crashed.log 2>&1 || true
        git checkout .
        echo ::endgroup::
        echo ::group::XFAIL Test Logs
        # Rewrite all xfails that have a run clause to skipif. This way we will
        # avoid conditionally crashing xfails
        find . -name "*.py" -exec sed -i -E 's/(^ *)@mark.xfail\(run=(.*)/\1@mark.skipif(condition=not \2/g' {} \;
        # See if we don't have an xfail that went away
        python -m pytest --runxfail -sv  | tee test_xfailed.log 2>&1 || true
        git checkout .
        echo ::endgroup::
        echo ::group::Passing Test Logs

        # Run the rest of the non-crashing tests.
        declare -i RETCODE=0

        set -o pipefail
        if [[ "${{ matrix.os }}" == macos-* ]]; then
        echo "Skipping Valgrind checks on macOS"
        else
            echo "Running valgrind on passing tests"
            CLANG_VERSION="${{ matrix.clang-runtime }}"
            SUPPRESSION_FILE="../etc/clang${CLANG_VERSION}-valgrind.supp"
            valgrind --show-error-list=yes --error-exitcode=1 --track-origins=yes --suppressions="${SUPPRESSION_FILE}" --suppressions=../etc/valgrind-cppyy-cling.supp python -m pytest -m "not xfail" -v
        fi
        export RETCODE=+$?
        echo ::endgroup::

        RETCODE=+$?

        echo "Complete Test Suite Summary: \n"
        tail -n1 complete_testrun.log
        echo "Crashing Summary: \n"
        tail -n1 test_crashed.log
        echo "XFAIL Summary:"
        tail -n1 test_xfailed.log
        echo "Return Code: ${RETCODE}"
        exit $RETCODE

    - name: Show debug info
      if: ${{ failure() && (runner.os != 'windows') }}
      run: |
        export
        echo $GITHUB_ENV

    - name: Setup tmate session
      if: ${{ failure() && runner.debug }}
      uses: mxschmitt/action-tmate@v3
      # When debugging increase to a suitable value!
      timeout-minutes: 30