Merge pull request #224 from icecube/fix-#223 #829

	# This workflow builds sphinx documentation and deploys static html files to the gh-pages branch.
	# Based on https://github.com/marketplace/actions/github-pages-action#%EF%B8%8F-static-site-generators-with-python

	name: Documentation

	on:
	push:
	branches:
	- master
	- docs
	pull_request:
	branches:
	- master

	jobs:
	deploy:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0

	- name: Setup Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.8'

	- name: Upgrade pip
	run: \|
	# install pip=>20.1 to use "pip cache dir"
	python3 -m pip install --upgrade pip

	- name: Get pip cache dir
	id: pip-cache
	run: echo "dir=$(pip cache dir)" >> $GITHUB_OUTPUT

	- name: Cache dependencies
	uses: actions/cache@v3
	with:
	path: ${{ steps.pip-cache.outputs.dir }}
	key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
	restore-keys: \|
	${{ runner.os }}-pip-

	- name: Install dependencies
	run: python3 -m pip install -r ./doc/sphinx/requirements.txt

	- name: Install pandoc
	run: sudo apt-get -y install pandoc

	- name: Build documentation
	run: \|
	cd ./doc/sphinx
	make html-multiversion
	cp _assets/gh-pages-redirect.html _build/index.html

	- name: Deploy
	uses: peaceiris/actions-gh-pages@v3
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: ./doc/sphinx/_build
	force_orphan: true

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