Concurrent immix #665

	name: Check broken links in docs

	on:
	pull_request:
	branches:
	- master

	jobs:
	check-broken-links-in-docs:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Restore lychee cache
	uses: actions/cache@v3
	with:
	path: .lycheecache
	key: cache-lychee-${{ github.sha }}
	restore-keys: cache-lychee-
	- name: Check links in docs/*.md
	uses: lycheeverse/lychee-action@v2
	with:
	fail: true
	token: ${{ secrets.GITHUB_TOKEN }}
	args:
	# Notes:
	# - Do not use `--base`. All relative URLs in Markdown are based on the file itself.
	# - Verbosity level 2 enables debug logs and shows redirections.
	# - Exclude dl.acm.org because it responses 403.
	# According to the YAML syntax,
	# the following lines will be concatenated into one single YAML string,
	# which is intended because the `args:` argument of the lychee-action takes one single string.
	--accept '200..=204,429,500'
	--verbose --verbose
	--no-progress
	--cache
	--max-cache-age 1d
	--exclude 'https://users.cecs.anu.edu.au/~steveb/pubs/papers/**'
	--exclude 'https://dl.acm.org/**'
	'./docs/*/.md'
	- name: Save lychee cache
	uses: actions/cache/save@v4
	if: always()
	with:
	path: .lycheecache
	key: ${{ steps.restore-cache.outputs.cache-primary-key }}

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