name: Nightly CMake Subproject Integration

on:
  schedule:
    # Run after the other nightly jobs to avoid starting every heavy job at once.
    - cron: '30 16 * * *'
  workflow_dispatch:

permissions:
  contents: read

jobs:
  subproject-integration:
    name: Subproject Build & Example
    runs-on: ubuntu-24.04
    timeout-minutes: 90

    steps:
      - name: Checkout code
        uses: actions/checkout@v7
        with:
          submodules: recursive

      - name: Setup ccache
        uses: hendrikmuhs/ccache-action@v1.2
        with:
          key: cmake-subproject-linux-x64
          max-size: 150M

      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: '3.10'
          cache: 'pip'
          cache-dependency-path: 'pyproject.toml'

      - name: Install system dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y --no-install-recommends \
            libaio-dev
        shell: bash

      - name: Set up environment variables
        run: |
          NPROC=$(nproc 2>/dev/null || echo 2)
          echo "NPROC=$NPROC" >> "$GITHUB_ENV"
          echo "$(python -c 'import site; print(site.USER_BASE)')/bin" >> "$GITHUB_PATH"
        shell: bash

      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          python -m pip install \
            cmake==3.30.0 \
            ninja==1.11.1
        shell: bash

      - name: Configure subproject integration
        run: |
          SMOKE_SOURCE="$RUNNER_TEMP/zvec-subproject-nightly"
          SMOKE_BUILD="$RUNNER_TEMP/zvec-subproject-nightly-build"

          mkdir -p "$SMOKE_SOURCE" "$SMOKE_BUILD"
          cp "$GITHUB_WORKSPACE/.github/cmake/subproject-integration/CMakeLists.txt" \
            "$SMOKE_SOURCE/CMakeLists.txt"

          CMAKE_ARGS=(
            -DZVEC_SOURCE_DIR="$GITHUB_WORKSPACE"
            -DCMAKE_BUILD_TYPE=Release
            -DENABLE_WERROR=ON
            -DUSE_OSS_MIRROR=ON
            -DCMAKE_C_COMPILER_LAUNCHER=ccache
            -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
            -DBUILD_TOOLS=OFF
            -DBUILD_C_BINDINGS=OFF
            -DBUILD_PYTHON_BINDINGS=OFF
          )

          cmake -S "$SMOKE_SOURCE" -B "$SMOKE_BUILD" -G Ninja \
            "${CMAKE_ARGS[@]}"

          echo "SMOKE_BUILD=$SMOKE_BUILD" >> "$GITHUB_ENV"
        shell: bash

      - name: Build subproject targets
        run: |
          cmake --build "$SMOKE_BUILD" --target \
            core_knn_diskann \
            zvec_embed_db_example \
            zvec_embed_core_example \
            zvec_embed_ailego_example \
            --parallel "$NPROC"
        shell: bash

      - name: Run subproject examples
        run: |
          cd "$SMOKE_BUILD"
          ./bin/zvec_embed_db_example
          ./bin/zvec_embed_core_example
          ./bin/zvec_embed_ailego_example
        shell: bash