Add initial extension (#1) #39

	name: Check Sphinx external links
	on:
	push:
	schedule:
	- cron: '0 5 * * 0' # once every Sunday at midnight ET
	workflow_dispatch:

	jobs:
	check-external-links:
	name: Check for broken Sphinx external links
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repo
	uses: actions/checkout@v4
	with:
	fetch-depth: 0 # tags are required to determine the version

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.12"

	- name: Install Sphinx dependencies and package
	run: \|
	python -m pip install --upgrade pip
	python -m pip install -r requirements-dev.txt
	python -m pip install .

	- name: Check Sphinx external links
	run: \|
	cd docs # run_doc_autogen assumes spec is found in ../spec/
	sphinx-build -b linkcheck ./source ./test_build

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