coverage.yml

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

name: Test coverage

jobs:
  coverage:
    name: Collect test coverage
    runs-on: ubuntu-latest
    env:
      # The `coverage_nightly` cfg value is not recognized, so we need to allow unknown
      # cfg values in order to have the build succeed.
      RUSTFLAGS: -D warnings -A unexpected_cfgs
      CARGO_TERM_COLOR: always
    steps:
      - uses: dtolnay/rust-toolchain@nightly
        with:
          components: llvm-tools-preview
      - uses: actions/checkout@v4
      - uses: Swatinem/rust-cache@v2
      - uses: taiki-e/install-action@nextest
      - uses: taiki-e/install-action@cargo-llvm-cov

      - name: Collect coverage data
        # Generate coverage report using nextest.
        run: |
          cargo llvm-cov --no-report nextest --all-features
          cargo llvm-cov --no-report --doc --all-features
          cargo llvm-cov report --doctests --lcov --output-path lcov.info
      - name: Upload coverage data to codecov
        uses: codecov/codecov-action@v4
        env:
          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
        with:
          files: lcov.info