GitHub Actions: Check URLs using lychee #21

	name: 🌐 Check URLs
	on:
	push:
	pull_request:
	schedule:
	# Every day at 18:00 UTC.
	# URLs can decay over time. Setting up a schedule makes it possible to be warned
	# about dead links as soon as possible.
	- cron: "0 18 * * *"

	jobs:
	check-urls:
	runs-on: ubuntu-24.04
	steps:

	- uses: actions/checkout@v4

	- name: Restore lychee cache
	uses: actions/cache@v4
	with:
	path: .lycheecache
	key: cache-lychee-${{ github.sha }}
	restore-keys: cache-lychee-

	- name: Run lychee
	uses: lycheeverse/lychee-action@v2
	with:
	args: >
	--base .
	--no-progress
	--cache
	--max-cache-age 1d
	--exclude-path _templates/
	--exclude-path classes/
	"*/.md" "*/.html" "*/.rst"

	- name: Fail if there were link errors
	run: exit ${{ steps.lc.outputs.exit_code }}

Provide feedback