link-checker #438

	name: link-checker

	on:
	pull_request:
	workflow_dispatch:
	schedule:
	- cron: '30 0 * * SUN' # Sunday “At 00:30”
	jobs:
	link-checker:
	runs-on: ubuntu-latest
	defaults:
	run:
	shell: bash -l {0}
	if: github.repository == 'brian-rose/ClimateLaboratoryBook'
	steps:
	- name: Cancel previous runs
	uses: styfle/[email protected]
	with:
	access_token: ${{ github.token }}
	- uses: actions/checkout@v4

	- name: Setup Mambaforge
	uses: conda-incubator/setup-miniconda@v3
	with:
	miniforge-variant: Mambaforge
	miniforge-version: latest
	activate-environment: book-render
	use-mamba: true

	- name: Set cache date
	run: echo "DATE=$(date +'%Y%m%d')" >> $GITHUB_ENV

	- uses: actions/cache@v4
	with:
	path: /usr/share/miniconda3/envs/book-render
	key: linux-64-conda-${{ hashFiles('render-environment.yml') }}-${{ env.DATE }}-${{ env.CACHE_NUMBER }}
	id: cache

	- name: Update environment
	if: steps.cache.outputs.cache-hit != 'true'
	run: mamba env update -n book-render -f render-environment.yml

	# - name: Disable notebook execution
	# shell: python
	# run: \|
	# import yaml
	# with open('_config.yml') as f:
	# data = yaml.safe_load(f)
	# data['execute']['execute_notebooks'] = 'off'
	# with open('_config.yml', 'w') as f:
	# yaml.dump(data, f)
	- name: Check external links
	run: \|
	jupyter-book build --builder linkcheck .

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