Nightly Coverage #128

	name: Nightly Coverage

	# This workflow can be called from ci.yml via workflow_call to avoid
	# duplicating coverage logic. It also runs nightly on a schedule.
	on:
	schedule:
	- cron: '0 4 * * *'
	workflow_dispatch:
	workflow_call:

	permissions:
	contents: read

	env:
	CARGO_TERM_COLOR: always

	jobs:
	coverage:
	name: Code coverage (core crates)
	runs-on: ubuntu-latest
	timeout-minutes: 30
	steps:
	- uses: actions/checkout@v4

	- name: Install Rust stable
	run: rustup update stable

	- name: Install llvm-tools
	run: rustup component add llvm-tools-preview

	- uses: actions/cache@v4
	with:
	path: \|
	~/.cargo/registry/index/
	~/.cargo/registry/cache/
	~/.cargo/git/db/
	target/
	key: coverage-${{ hashFiles('rust-toolchain.toml') }}-${{ hashFiles('**/Cargo.lock') }}
	restore-keys: \|
	coverage-

	- name: Install cargo-llvm-cov
	run: cargo install cargo-llvm-cov --locked

	- name: Generate coverage report
	run: \|
	cargo llvm-cov \
	--package flight-core \
	--package flight-axis \
	--package flight-bus \
	--package flight-units \
	--lcov --output-path lcov.info

	- name: Generate HTML report
	run: \|
	cargo llvm-cov \
	--package flight-core \
	--package flight-axis \
	--package flight-bus \
	--package flight-units \
	--html --output-dir coverage-html

	- name: Upload coverage (lcov)
	if: always()
	uses: actions/upload-artifact@v4
	with:
	name: coverage-lcov
	path: lcov.info
	retention-days: 30

	- name: Upload coverage (HTML)
	if: always()
	uses: actions/upload-artifact@v4
	with:
	name: coverage-html
	path: coverage-html/
	retention-days: 30

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