Merge pull request #2301 from ruby/unexpected #774

	name: GitHub pages

	on:
	# Runs on pushes targeting the default branch
	push:
	branches:
	- main

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
	permissions:
	contents: read
	pages: write
	id-token: write

	# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
	# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
	concurrency:
	group: "pages"
	cancel-in-progress: false

	jobs:
	build:
	if: github.repository == 'ruby/prism'
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Setup Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: "3.2"
	bundler-cache: true
	- name: Install doxygen and dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install doxygen graphviz
	- name: Setup Pages
	id: pages
	uses: actions/configure-pages@v4
	- name: Template source files
	run: bundle exec rake templates
	- name: Build with RDoc
	run: bundle exec rake rdoc
	- name: Build with Doxygen
	run: doxygen Doxyfile
	- name: Upload artifact
	uses: actions/upload-pages-artifact@v3
	with:
	path: doc

	deploy:
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	runs-on: ubuntu-latest
	needs: build
	steps:
	- name: Deploy to GitHub Pages
	id: deployment
	uses: actions/deploy-pages@v4

Provide feedback