Bump actions/checkout from 3 to 4 (#518) #193

	name: Update gh-pages documentation for main branch

	on:
	workflow_dispatch:
	push:
	branches:
	- main

	env:
	PYTHONUNBUFFERED: 1

	jobs:
	docs:
	runs-on: ubuntu-latest

	steps:
	- name: Check out the main branch
	uses: actions/checkout@v4
	# We need a full clone rather than a shallow clone so that setuptools-scm
	# can compute the right version number for the docs.
	# xref: https://github.com/pypa/setuptools_scm/issues/431
	with:
	fetch-depth: 0
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.10'
	- name: Install graphviz
	run: \|
	sudo apt-get update
	sudo apt-get install graphviz
	- name: Install dependencies and local packages
	run: \|
	python -m pip install -r docs/requirements.txt
	python -m pip install .
	- name: Build HTML documentation with Sphinx
	run: \|
	cd docs
	python -m sphinx -b html -d doctrees source build
	- name: Configure Git
	run: \|
	git config user.name "Documentation Bot"
	git config user.email "<>"
	- name: Update gh-pages branch
	run: \|
	git fetch --depth=1 origin gh-pages
	git checkout gh-pages
	rm -r dev
	mv docs/build dev
	git add dev
	# Only commit if there are changes
	git diff-index --quiet --cached HEAD \|\| git commit -m "Automated update of main branch documentation"
	git push origin gh-pages

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