ci: Benchmark NewReno and Cubic #18

	name: Find mutants
	on:
	pull_request:
	branches: ["main"]
	paths-ignore: [".md", ".png", ".svg", "LICENSE-"]

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref_name }}
	cancel-in-progress: true

	jobs:
	incremental-mutants:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Relative diff
	run: git diff origin/${{ github.base_ref }}.. > pr.diff

	- name: Install dependencies
	env:
	DEBIAN_FRONTEND: noninteractive
	run: \|
	sudo apt-get install -y --no-install-recommends gyp mercurial ninja-build lld
	echo "RUSTFLAGS=-C link-arg=-fuse-ld=lld" >> "$GITHUB_ENV"

	- name: Fetch and build NSS and NSPR
	uses: ./.github/actions/nss

	- name: Install Rust
	uses: ./.github/actions/rust
	with:
	version: stable

	- name: Mutants
	run: \|
	# Don't fail the build if mutants fail, for now.
	set -o pipefail
	cargo mutants --test-tool=nextest --no-shuffle -j 2 -vV --in-diff pr.diff \| tee results.txt \|\| true
	{
	echo "### Mutants"
	echo "See https://mutants.rs/using-results.html for more information."
	echo '```'
	cat results.txt
	echo '```'
	} > "$GITHUB_STEP_SUMMARY"

	- name: Archive mutants.out
	uses: actions/upload-artifact@v4
	if: always()
	with:
	name: mutants.out
	path: mutants.out

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