clang_matrix.yml

name: Clang Matrix for Linux build
permissions: read-all
on:
  schedule:
    - cron: '0 0 * * 0'  # Run at midnight (UTC) every Sunday
  workflow_dispatch:     # Allow manual triggering
concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
  cancel-in-progress: true

jobs:
  # don't cache, run full build
  build-multi-clang:
    strategy:
      matrix:
        clang-version: [15, 16, 17, 18, 19]
      fail-fast: false
    runs-on:
      labels: ubuntu-22.04-8core
    steps:
      - name: Check out repository code
        uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # pin@v3

      - name: Install Clang ${{ matrix.clang-version }}
        run: |
          sudo apt-get update
          sudo apt-get install -y clang-${{ matrix.clang-version }}
          clang-${{ matrix.clang-version }} --version

      - name: "Run `bazel build` with Clang ${{ matrix.clang-version }}"
        run: |
          bazel build --keep_going --noincompatible_strict_action_env \
            --action_env=CC=clang-${{ matrix.clang-version }} \
            --action_env=CXX=clang++-${{ matrix.clang-version }} \
            --host_action_env=CC=clang-${{ matrix.clang-version }} \
            --host_action_env=CXX=clang++-${{ matrix.clang-version }} \
            --//:enable_openmp=0 \
            -c fastbuild //...