ci.yml

name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build-and-test:
    runs-on: ubuntu-24.04

    env:
      VCPKG_ROOT: ${{ github.workspace }}/vcpkg

    steps:
      - uses: actions/checkout@v4

      - name: Install GCC 14
        run: |
          sudo apt-get update
          sudo apt-get install -y gcc-14 g++-14
          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 100
          sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-14 100

      - name: Set up vcpkg
        run: |
          git clone https://github.com/microsoft/vcpkg.git $VCPKG_ROOT
          $VCPKG_ROOT/bootstrap-vcpkg.sh -disableMetrics

      - name: Cache vcpkg packages
        uses: actions/cache@v4
        with:
          path: ${{ github.workspace }}/vcpkg/installed
          key: vcpkg-${{ runner.os }}-${{ hashFiles('vcpkg.json') }}
          restore-keys: vcpkg-${{ runner.os }}-

      - name: Configure
        run: |
          cmake -B build \
            -DCMAKE_TOOLCHAIN_FILE=$VCPKG_ROOT/scripts/buildsystems/vcpkg.cmake \
            -DCMAKE_BUILD_TYPE=Release \
            -DCMAKE_CXX_COMPILER=g++-14

      - name: Build
        run: cmake --build build --parallel

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

      - name: Run examples
        run: |
          mkdir -p example-output
          build/example/clock          > example-output/clock.txt
          build/example/echobox        > example-output/echobox.txt
          build/example/custom-event-list > example-output/custom-event-list.txt

      - name: Validate example output
        run: |
          fail=0

          check_contains() {
            local file="$1" pattern="$2"
            if ! grep -qF "$pattern" "$file"; then
              echo "FAIL $file: missing '$pattern'"
              fail=1
            fi
          }
          check_lines() {
            local file="$1" expected="$2"
            local actual
            actual=$(wc -l < "$file")
            if [ "$actual" -ne "$expected" ]; then
              echo "FAIL $file: expected $expected lines, got $actual"
              fail=1
            fi
          }

          # clock: 7200s rational-time simulation — 3600 seconds + 120 minutes + 2 hours = 7322 ticks
          # plus 3 model_setup + simulation_start + simulation_end + performance = 7325 lines
          check_lines   example-output/clock.txt 7325
          check_contains example-output/clock.txt '"event":"model_setup"'
          check_contains example-output/clock.txt '"msg":"Creating atomic models for 3 needles"'
          check_contains example-output/clock.txt '"event":"simulation_start"'
          check_contains example-output/clock.txt '"event":"tick","msg":"minute"'
          check_contains example-output/clock.txt '"event":"simulation_end"'
          check_contains example-output/clock.txt '"event":"performance"'

          # echobox: two echo atomics, 12 tick events + 4 model_setup + start + end + perf = 19 lines
          check_lines   example-output/echobox.txt 19
          check_contains example-output/echobox.txt '"msg":"Creating atomic models for the 2 echos"'
          check_contains example-output/echobox.txt '"event":"simulation_start"'
          check_contains example-output/echobox.txt '"event":"tick"'
          check_contains example-output/echobox.txt '"event":"simulation_end"'
          check_contains example-output/echobox.txt '"event":"performance"'

          # custom-event-list: istream model with hello/world string messages
          check_lines   example-output/custom-event-list.txt 10
          check_contains example-output/custom-event-list.txt '"event":"tick","msg":"hello"'
          check_contains example-output/custom-event-list.txt '"event":"tick","msg":"world"'
          check_contains example-output/custom-event-list.txt '"event":"simulation_end"'

          if [ "$fail" -ne 0 ]; then
            echo "One or more output validation checks failed."
            exit 1
          fi
          echo "All output validation checks passed."

      - name: Upload example output
        uses: actions/upload-artifact@v4
        with:
          name: example-output
          path: example-output/