Jarvy/.github/workflows/coverage.yml at main · bearbinary/Jarvy · GitHub

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name: Coverage

on:
  # Coverage gates PRs pre-merge; release tags publish the canonical
  # post-merge coverage number. push-to-main removed because the
  # merge commit already matches a validated PR head. ~10 min run, so
  # not running it on every merge saves significant runner time.
  pull_request:
    branches: [ "main" ]
    # Positive filter: coverage signal only matters when source / tests /
    # dep manifests change. Doc-only / config-only / examples-only PRs
    # don't shift the coverage number, and the workflow takes ~10 min
    # of Linux quota per run. Keeps the PR-time coverage gate but skips
    # the runs that would have produced an identical number.
    paths:
      - 'src/**'
      - 'crates/**'
      - 'tests/**'
      - 'benches/**'
      - 'build.rs'
      - 'Cargo.toml'
      - '.github/workflows/coverage.yml'
  push:
    tags:
      - 'v[0-9]+.[0-9]+.[0-9]+'
      - 'v[0-9]+.[0-9]+.[0-9]+-*'
  workflow_dispatch:

permissions:
  contents: read

# Cancel previous runs on the same ref (force-push during PR iteration).
concurrency:
  group: coverage-${{ github.ref }}
  cancel-in-progress: true

env:
  CARGO_TERM_COLOR: always
  RUST_BACKTRACE: 1

jobs:
  coverage:
    name: Code Coverage
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

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

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

      - name: Rust cache
        uses: swatinem/rust-cache@v2

      - name: Generate code coverage
        run: cargo llvm-cov --all-features --workspace --lcov --output-path lcov.info
        env:
          JARVY_TEST_MODE: 1
          JARVY_FAST_TEST: 1

      - name: Upload coverage to Codecov
        uses: codecov/codecov-action@v4
        with:
          token: ${{ secrets.CODECOV_TOKEN }}
          files: lcov.info
          fail_ci_if_error: false
          verbose: true

      - name: Generate HTML report
        run: cargo llvm-cov --all-features --workspace --html
        env:
          JARVY_TEST_MODE: 1
          JARVY_FAST_TEST: 1

      - name: Upload HTML coverage report
        uses: actions/upload-artifact@v7
        with:
          name: coverage-report
          path: target/llvm-cov/html/
          retention-days: 7

  coverage-check:
    name: Coverage Threshold Check
    runs-on: ubuntu-latest
    needs: coverage
    steps:
      - uses: actions/checkout@v4

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

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

      - name: Rust cache
        uses: swatinem/rust-cache@v2

      - name: Check coverage threshold (80%)
        run: |
          COVERAGE=$(cargo llvm-cov --all-features --workspace --json 2>/dev/null | jq -r '.data[0].totals.lines.percent // 0')
          echo "Current coverage: ${COVERAGE}%"
          if (( $(echo "$COVERAGE < 50" | bc -l) )); then
            echo "::warning::Coverage is below 50% (${COVERAGE}%). Target is 80%."
          fi
          # Note: Threshold enforcement will be enabled once coverage improves
          # if (( $(echo "$COVERAGE < 80" | bc -l) )); then
          #   echo "::error::Coverage ${COVERAGE}% is below required 80% threshold"
          #   exit 1
          # fi
        env:
          JARVY_TEST_MODE: 1
          JARVY_FAST_TEST: 1