coverage.yml

name: Coverage

on:
  push:
    branches: [main]

env:
  CARGO_TERM_COLOR: always
  MIN_COVERAGE: "80"

jobs:
  coverage:
    name: Coverage
    runs-on: ubuntu-latest
    env:
      DEACON_NETWORK_TESTS: "1"
    steps:
    - name: Free disk space (before cache restore)
      run: |
        # Remove pre-installed software to free ~30GB BEFORE cache restore
        sudo rm -rf /usr/share/dotnet /usr/local/lib/android /opt/ghc /opt/hostedtoolcache/CodeQL 2>/dev/null || true
        echo "=== Disk space after pre-cleanup ==="
        df -h

    - name: Checkout code
      uses: actions/checkout@v6

    - name: Install Rust toolchain
      uses: dtolnay/rust-toolchain@stable
      with:
        components: llvm-tools-preview

    - name: Install cargo-llvm-cov
      uses: taiki-e/install-action@v2
      with:
        tool: cargo-llvm-cov

    - name: Cache cargo registry and target
      uses: actions/cache@v5
      with:
        path: |
          ~/.cargo/registry
          ~/.cargo/git
          target
        key: ${{ runner.os }}-llvmcov-${{ hashFiles('**/Cargo.lock') }}
        restore-keys: |
          ${{ runner.os }}-llvmcov-

    - name: Ensure Docker is running and clean
      run: |
        sudo service docker start
        docker info
        # Clean Docker after cache restore
        sudo docker system prune -af --volumes
        sudo docker builder prune -af
        echo "=== Disk space after Docker cleanup ==="
        df -h

    - name: Generate coverage (fail under ${{ env.MIN_COVERAGE }}%)
      run: |
        mkdir -p coverage
        cargo llvm-cov --workspace --lcov --output-path coverage/lcov.info --text --fail-under-lines ${{ env.MIN_COVERAGE }} -- --test-threads=1 | tee -a "$GITHUB_STEP_SUMMARY"

    - name: Upload lcov artifact
      uses: actions/upload-artifact@v7
      with:
        name: coverage-lcov
        path: coverage/lcov.info