coverage.yml

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

name: Test coverage

jobs:
  coverage:
    name: Collect test coverage
    runs-on: ubuntu-latest
    # nightly rust might break from time to time
    continue-on-error: true
    env:
      RUSTFLAGS: -D warnings
      CARGO_TERM_COLOR: always
    steps:
      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
        # Nightly Rust is used for cargo llvm-cov --doc below.
      - uses: dtolnay/rust-toolchain@nightly
        with:
          components: llvm-tools-preview
      - uses: Swatinem/rust-cache@23bce251a8cd2ffc3c1075eaa2367cf899916d84 # v2

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

      - name: Collect coverage data
        # Generate separate reports for nextest and doctests, and combine them.
        run: |
          cargo llvm-cov --no-report nextest
          cargo llvm-cov --no-report --doc
          cargo llvm-cov report --doctests --lcov --output-path lcov.info
      - name: Upload coverage data to codecov
        uses: codecov/codecov-action@84508663e988701840491b86de86b666e8a86bed # v4
        env:
          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
        with:
          files: lcov.info