coverage.yml

on:
  push:
    branches: [main, auto, canary]
  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@11bd71901bbe5b1630ceea73d27597364c9af683 # 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@82a92a6e8fbeee089604da2575dc567ae9ddeaab # v2

      - name: Install latest nextest release
        uses: taiki-e/install-action@c4bf614c2fb42375baf4f51283c33befce095fc5 # v2
        with:
          tool: nextest
      - name: Install cargo-llvm-cov
        uses: taiki-e/install-action@c4bf614c2fb42375baf4f51283c33befce095fc5 # v2
        with:
          tool: 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@5c47607acb93fed5485fdbf7232e8a31425f672a # v5
        env:
          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
        with:
          files: lcov.info