Update Python from 3.8 to 3.9 #279

	name: Ubuntu Build

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	workflow_dispatch:

	env:
	BUILD_VIDEOS: true
	NOKOGIRI_USE_SYSTEM_LIBRARIES: true # for faster htmlproofer install


	jobs:
	sphinx-ubuntu:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python 3.9
	uses: actions/setup-python@v5
	with:
	python-version: 3.9

	- name: Cache python env
	uses: actions/cache@v4
	with:
	path: ${{ env.pythonLocation }}
	key: v2-${{ env.pythonLocation }}-${{ hashFiles('requirements.txt') }}

	- name: Install html-proofer
	run: sudo gem install html-proofer -v '<4.4'

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip wheel
	pip install -r requirements.txt

	- name: Build
	run: \|
	cd docs
	sphinx-build -q -W -b dirhtml -d _build/doctrees . _build/html
	cd ../

	# Upload performance is awful on the many small files our build generates,
	# so it's compressed locally before uploading
	# we archive the html and set it as an artifact prior to checking the links.
	# this allows for review should it fail.
	- name: Compress site
	run: tar -czf html.tar.gz docs/_build/html

	- name: Archive site HTML
	uses: actions/upload-artifact@v4
	with:
	name: html
	path: html.tar.gz

	- name: Check links
	if: success()
	run: \|
	htmlproofer --ignore-files "/404/,/2013/,/2014/,/2015/,/2016/,/2017/,/search\/index.html/" --allow-hash-href=true --enforce-https=false --ignore-missing-alt=true --disable-external=true docs/_build/html

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