name: Build Clang P2996
on:
  push:
    branches:
      - automated-release

jobs:
  build:
    runs-on: self-hosted
    container:
      image: node:20-bullseye

    env:
      INSTALL_PATH: ${{ github.workspace }}/install

    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Install dependencies
        run: |
          apt-get update
          apt-get install -y \
            make \
            python3 \
            python3-pip \
            zlib1g-dev \
            build-essential \
            lld \
            clang \
            wget \
            libssl-dev
          pip3 install PyYAML>=5.1

      - name: Install CMake (from source)
        run: |
          CMAKE_VERSION=3.28.3
          cd /tmp
          wget -q https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}.tar.gz
          tar -xzf cmake-${CMAKE_VERSION}.tar.gz
          cd cmake-${CMAKE_VERSION}
          ./bootstrap --prefix=/usr/local
          make -j$(nproc)
          make install
          cmake --version

      - name: Configure LLVM/Clang for Reflection + Runtimes
        run: |
          export CC=clang
          export CXX=clang++

          cmake -S llvm -B build \
            -DLLVM_ENABLE_PROJECTS='clang;clang-tools-extra' \
            -DLLVM_ENABLE_RUNTIMES='libcxx;libcxxabi;libunwind' \
            -DLLVM_TARGETS_TO_BUILD='X86' \
            -DLLVM_INSTALL_TOOLCHAIN_ONLY=OFF \
            -DLLVM_INCLUDE_TESTS=OFF \
            -DLLVM_INCLUDE_EXAMPLES=OFF \
            -DLLVM_INCLUDE_DOCS=OFF \
            -DLLVM_ENABLE_ASSERTIONS=OFF \
            -DLLVM_ENABLE_RTTI=ON \
            -DLLVM_ENABLE_EH=ON \
            -DCMAKE_BUILD_TYPE=MinSizeRel \
            -DLLVM_ENABLE_LLD=ON \
            -DBUILD_SHARED_LIBS=ON \
            -DCMAKE_INSTALL_PREFIX=${INSTALL_PATH}

      - name: Build Clang + clangd + libc++
        run: |
          cmake --build build --parallel=$(nproc)

      - name: Install
        run: |
          cmake --install build --prefix ${INSTALL_PATH}

      - name: Strip binaries (safe mode — leaves symbols needed by libc++)
        run: |
          find ${INSTALL_PATH} -type f -not -name "*.a" -not -name "*.so" \
            -exec strip --strip-unneeded {} + 2>/dev/null || true

      - name: Package artifact (Zstd)
        run: |
          apt-get update && apt-get install -y zstd
          tar --use-compress-program=zstd -cf clang-p2996.tar.zst -C ${INSTALL_PATH} .

      - name: Upload artifact
        uses: actions/upload-artifact@v3
        with:
          name: clang-p2996
          path: clang-p2996.tar.zst