ci.yml

name: CI

on:
  push:
    branches: [main]
  pull_request:

jobs:
  test:
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v7

      - name: Install bison/flex (Linux)
        if: runner.os == 'Linux'
        run: sudo apt-get update && sudo apt-get install -y bison flex

      - name: Install bison/flex (macOS)
        if: runner.os == 'macOS'
        run: brew install bison flex

      - name: Install bison/flex (Windows)
        if: runner.os == 'Windows'
        # windows-latest ships MSYS2 pre-installed at C:\msys64 (not on
        # PATH). Its bison (3.8.2) satisfies parser.y's %require "3.8";
        # winflexbison3's Chocolatey package is stuck on bison 3.7.4 (2021
        # release) and fails that check. CMakeLists.txt's own WIN32 block
        # points BISON_EXECUTABLE/FLEX_EXECUTABLE straight at the MSYS2
        # binaries.
        run: C:\msys64\usr\bin\bash.exe -lc "pacman -Sy --noconfirm bison flex"

      - name: Configure
        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=Release

      # --config/-C Release: a no-op on the single-config generators
      # Linux/macOS use (CMAKE_BUILD_TYPE already picked the config), but
      # required on Windows's default multi-config Visual Studio
      # generator, which ignores CMAKE_BUILD_TYPE entirely -- passing it
      # unconditionally on all three platforms is simpler than branching.
      - name: Build
        run: cmake --build build --config Release -j

      - name: Test
        run: ctest --test-dir build --output-on-failure -C Release