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ci: Validate JupyterBook build on PRs without deploying #29

	name: Render JupyterBook

	on:
	push:
	branches:
	- main
	- master
	- setup_jupyter_book
	pull_request:
	branches:
	- main
	workflow_dispatch: # allow manual triggers

	permissions:
	contents: read

	# Cancel superseded PR builds, but never cancel an in-progress Pages deployment
	concurrency:
	group: ${{ github.event_name == 'pull_request' && format('pr-{0}', github.ref) \|\| 'pages' }}
	cancel-in-progress: true

	jobs:
	build:
	# Compile the book on every push and pull request. PRs stop here.
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- name: Install dependencies
	run: \|
	python3 -m pip install --upgrade pip
	pip3 install "jupyter-book<2.0.0"

	- name: Build JupyterBook
	run: \|
	jupyter-book build .

	- name: Upload Pages artifact
	uses: actions/upload-pages-artifact@v4
	with:
	path: '_build/html'

	deploy:
	# Publish only for pushes and manual runs; pull requests never deploy.
	if: github.event_name != 'pull_request'
	needs: build

	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}

	runs-on: ubuntu-latest

	permissions:
	pages: write
	id-token: write

	steps:
	- name: Deploy to GitHub Pages
	id: deployment
	uses: actions/deploy-pages@v4