coverage.yml

name: Code Coverage

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

jobs:
  coverage:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Install dependencies
        run: |
          sudo apt update
          sudo apt install -y lcov cmake ninja-build g++ libgtest-dev

      - name: Configure project with coverage flags
        run: cmake -B build -DENABLE_COVERAGE=ON -DCMAKE_BUILD_TYPE=Debug -G Ninja

      - name: Build the project
        run: cmake --build build

      - name: Run tests
        run: cd build && ctest --output-on-failure

      - name: Generate coverage report
        run: |
          cd build
          lcov --directory . --capture --output-file coverage.info \
               --rc geninfo_auto_base=1 --ignore-errors mismatch
          lcov --remove coverage.info '/usr/*' '*/tests/*' --output-file coverage.filtered.info
          genhtml coverage.filtered.info --output-directory coverage-report

      - name: Show coverage summary
        run: |
          cd build
          lcov --summary coverage.filtered.info

      - name: Upload coverage report as artifact
        uses: actions/upload-artifact@v4
        with:
          name: coverage-report
          path: build/coverage-report

      - name: Enforce coverage threshold
        run: |
          cd build
          THRESHOLD=100
          COVERAGE=$(lcov --summary coverage.filtered.info | grep "lines" | awk '{ print $2 }' | sed 's/%//')
          echo "Total coverage: $COVERAGE%"
          if (( $(echo "$COVERAGE < $THRESHOLD" | bc -l) )); then
            echo "❌ Coverage below threshold of ${THRESHOLD}%"
            exit 1
          else
            echo "✅ Coverage is above threshold"
          fi