name: CI
on:
  push:
    branches:
      - master
    tags:
      - '*'
  pull_request:
    branches:
      - master

jobs:
  Build:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        # NOTE: must list all targets in `include` here to activate them
        name: [Linux, "Linux Debug", "Linux fsanitize", "Linux LLVM=ON", macOS, Windows]
        include:
          - name: Linux
            os: ubuntu-latest
            check-stage3: true
            test-speedcenter: true
          - name: Linux Debug
            os: ubuntu-latest
            CMAKE_OPTIONS: -DCMAKE_BUILD_TYPE=Debug
          - name: Linux fsanitize
            os: ubuntu-latest
            CMAKE_OPTIONS: -DLEAN_EXTRA_CXX_FLAGS=-fsanitize=address,undefined -DLEANC_EXTRA_FLAGS=-fsanitize=address,undefined
          - name: Linux LLVM=ON
            os: ubuntu-latest
            CMAKE_OPTIONS: -DLLVM=ON
          - name: macOS
            os: macos-latest
          - name: Windows
            os: windows-latest
            CMAKE_OPTIONS: -DCMAKE_BUILD_TYPE=Release -G "Unix Makefiles" -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
      # complete all jobs
      fail-fast: false
    env:
      # must be inside workspace
      CCACHE_DIR: ${{ github.workspace }}/.ccache
      CCACHE_COMPRESS: true
      # current cache limit
      CCACHE_MAXSIZE: 200M
      CMAKE_OPTIONS: ${{ matrix.CMAKE_OPTIONS }}
    steps:
      - name: Checkout
        uses: actions/checkout@v1
      - name: Install Nix
        uses: cachix/install-nix-action@v5
        if: matrix.os != 'windows-latest'
      - name: Install MSYS2
        uses: numworks/setup-msys2@v1
        if: matrix.os == 'windows-latest'
      # binaries segfault without this step (?!), must be separate step because it might update the MSYS2 runtime
      - name: Update MSYS2
        run: msys2do pacman -Syu --noconfirm
        if: matrix.os == 'windows-latest'
      - name: Cache
        uses: actions/cache@v1
        with:
          path: .ccache
          key: ${{ matrix.name }}-build-${{ github.sha }}
          # fall back to (latest) previous cache
          restore-keys: |
            ${{ matrix.name }}-build
      - name: Setup
        run: |
          # open shell once for initial setup
          nix-shell --run true
        if: matrix.os != 'windows-latest'
      - name: Setup
        run: msys2do pacman --noconfirm -S make python mingw-w64-x86_64-cmake mingw-w64-x86_64-clang mingw-w64-x86_64-ccache git diffutils
        if: matrix.os == 'windows-latest'
      - name: Build
        run: nix-shell --run ./script/ci.sh
        if: matrix.os != 'windows-latest'
      - name: Build
        run: msys2do ./script/ci.sh
        if: matrix.os == 'windows-latest'
      - name: Test
        run: nix-shell --run "cd build; ctest -j --output-on-failure < /dev/null"
        if: matrix.os != 'windows-latest'
      - name: Test
        run: msys2do cd build; ctest -j --output-on-failure ^< /dev/null
        shell: cmd
        if: matrix.os == 'windows-latest'
      - name: Check Stage 3
        run: nix-shell --run "cd build; make -j4 check-stage3"
        if: matrix.check-stage3
      - name: Test Speedcenter Benchmarks
        run: nix-shell --run "cd tests/bench; temci exec --config speedcenter.yaml --runs 1"
        if: matrix.test-speedcenter
      - name: CCache stats
        run: nix-shell --run "ccache -s"
        if: matrix.os != 'windows-latest'
      - name: CCache stats
        run: msys2do ccache -s
        if: matrix.os == 'windows-latest'