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name: Coverage
on:
push:
branches:
- main
env:
CARGO_TERM_COLOR: always
RUST_BACKTRACE: 1
jobs:
coverage:
name: Coverage
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
# Coverage runs on nightly (not the pinned 1.95.0 toolchain used by
# build/test/CI) so doc-tests can be instrumented. rustdoc's
# --persist-doctests sits behind -Z unstable-options; without it the
# report misses every `# Examples` block AND inserts phantom uncovered
# regions on `..Default::default()` and `/// ```` lines. Mirrors `just
# cover`. Stable still gates build/clippy/test in ci.yml.
- uses: dtolnay/rust-toolchain@nightly
with:
components: llvm-tools-preview
- uses: Swatinem/rust-cache@v2
- name: Install cargo-llvm-cov
uses: taiki-e/install-action@v2
with:
tool: cargo-llvm-cov
- name: Generate coverage (sync + async + doctests, merged)
# `+nightly` overrides rust-toolchain.toml (pinned to stable 1.95.0).
# Without it, rustdoc rejects `-Z unstable-options --persist-doctests`.
# Mirrors `just cover`.
run: |
mkdir -p coverage
cargo +nightly llvm-cov clean --workspace
cargo +nightly llvm-cov --no-report --doctests --no-default-features --features sync
cargo +nightly llvm-cov --no-report --doctests --no-default-features --features async
cargo +nightly llvm-cov report --lcov --output-path coverage/lcov.info
- name: Upload to Coveralls
uses: coverallsapp/github-action@v2
with:
file: coverage/lcov.info
allow-empty: true