coverage.yml

name: Coverage

on:
  push:
    branches:
      - main
  pull_request:

# Cancel any in-progress run for the same branch/PR so that only the latest
# commit is measured, saving runner minutes.
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  coverage:
    name: Code Coverage
    runs-on: ubuntu-latest
    permissions:
      contents: read
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6

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

      - name: Cache Rust build artifacts
        uses: Swatinem/rust-cache@v2
        with:
          shared-key: "coverage"

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

      - name: Generate code coverage
        run: cargo llvm-cov --workspace --lcov --output-path lcov.info --fail-under-lines 60
        env:
          RUST_MIN_STACK: 16777216

      - name: Upload coverage to Codecov
        uses: codecov/codecov-action@v6
        with:
          files: lcov.info
          fail_ci_if_error: true
          token: ${{ secrets.CODECOV_TOKEN }}