README: add language table with source sizes to Features section #31

	name: Coverage Report

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

	permissions:
	contents: read

	jobs:
	coverage:
	name: Generate Coverage Report
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y gcc g++ lcov

	- name: Configure
	run: \|
	cmake -B build \
	-DENABLE_COVERAGE=ON \
	-DBUILD_TESTS=ON

	- name: Build
	run: cmake --build build

	- name: Test
	run: ctest --test-dir build --output-on-failure

	- name: Generate coverage report
	run: \|
	cd build
	lcov --capture --directory . --output-file lcov_raw.info \
	--rc branch_coverage=1 \
	--ignore-errors empty,empty,unused,unused
	lcov --remove lcov_raw.info \
	"/tests/" "/_deps/" "/usr/*" \
	--output-file lcov.info \
	--rc branch_coverage=1 \
	--ignore-errors empty,empty,unused,unused
	if [ -s lcov.info ]; then
	genhtml lcov.info --output-directory coverage --branch-coverage
	else
	mkdir -p coverage
	echo "<html><body><h1>No coverage data yet (stubs only)</h1></body></html>" > coverage/index.html
	fi

	- name: Upload coverage artifact
	uses: actions/upload-artifact@v4
	with:
	name: coverage-report
	path: build/coverage/

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