coverage.yml

name: Coverage

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

jobs:
  coverage:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      
      - name: Install Rust
        uses: dtolnay/rust-toolchain@stable
        with:
          components: llvm-tools-preview
      
      - name: Install cargo-llvm-cov
        run: cargo install cargo-llvm-cov
      
      - name: Run tests with coverage
        run: |
          cargo llvm-cov --workspace --lib \
            --exclude wasm-runner \
            --exclude inference-playground-server \
            --lcov --output-path lcov.info
      
      - name: Generate coverage summary
        run: |
          cargo llvm-cov --workspace --lib \
            --exclude wasm-runner \
            --exclude inference-playground-server \
            --summary-only
      
      - name: Check AST module coverage threshold
        run: |
          # Extract coverage for AST files
          COVERAGE=$(cargo llvm-cov --workspace --lib \
            --exclude wasm-runner \
            --exclude inference-playground-server \
            --summary-only 2>&1 | \
            grep 'ast/src' | \
            awk '{sum+=$7; count++} END {if (count>0) print sum/count; else print 0}')
          
          echo "Average AST module coverage: ${COVERAGE}%"
          
          # Threshold currently at 40% (actual current coverage)
          # Target is 98%, increase gradually as tests are added
          THRESHOLD=40
          
          if (( $(echo "$COVERAGE < $THRESHOLD" | bc -l) )); then
            echo "Coverage ${COVERAGE}% is below threshold ${THRESHOLD}%"
            exit 1
          fi
      
      - name: Upload coverage to Codecov
        uses: codecov/codecov-action@v4
        if: ${{ secrets.CODECOV_TOKEN != '' }}
        continue-on-error: true
        with:
          files: lcov.info
          fail_ci_if_error: false
          token: ${{ secrets.CODECOV_TOKEN }}