build/util: prevent infinite loop if target/ not found #1811

	# adapted from:
	#
	# * base code: https://peterevans.dev/posts/github-actions-how-to-automate-code-formatting-in-pull-requests/
	# * fix push auth: https://github.com/ad-m/github-push-action
	# * checkout PR head commit https://github.com/actions/checkout#checkout-pull-request-head-commit-instead-of-merge-commit
	name: documentation
	on:
	push:
	branches: [master]

	jobs:
	deploy:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	ref: ${{ github.event.pull_request.head.sha }}

	- name: Create output directories
	run: \|
	mkdir -p output/reference
	mkdir -p output/bugs

	- name: Copy static website files
	run: \|
	cp website/index.html output/index.html
	cp website/style.css output/style.css
	cp website/bugs/index.html output/bugs/index.html

	- name: Generate reference
	id: adocbuild
	uses: tonynv/asciidoctor-action@master
	with:
	program: asciidoctor doc/index.adoc -o output/reference/index.html


	- name: Deploy 🚀
	uses: JamesIves/github-pages-deploy-action@v4
	with:
	branch: gh-pages # The branch the action should deploy to.
	folder: output # The folder the action should deploy.

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