Add Antora CI #9

	# Copyright 2024 Sascha Willems
	# SPDX-License-Identifier: CC-BY-4.0
	# This Antora playbook is used by the CI to make sure the Antora build works

	name: "Build Antora documentation"

	on:
	workflow_dispatch:
	pull_request:
	types: [ opened, synchronize, reopened ]
	push:
	branches: [ main ]

	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.ref }}
	cancel-in-progress: true

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: "recursive"

	- name: "Get Antora UI bundle"
	uses: actions/checkout@v4
	with:
	repository: KhronosGroup/antora-ui-khronos
	path: ./antora-ui-khronos
	ref: main

	- name: "Install npm"
	uses: actions/setup-node@v4
	with:
	node-version: 'latest'
	cache: 'npm'

	- name: "Install dependencies"
	run: \|
	sudo apt-get update
	sudo apt-get install -y asciidoctor

	- name: "Build UI bundle"
	working-directory: ./antora-ui-khronos
	run: \|
	npx update-browserslist-db@latest
	./node_modules/gulp/bin/gulp.js --version
	./node_modules/gulp/bin/gulp.js bundle

	- name: "Copy UI bundle"
	run: cp ./antora-ui-khronos/build/ui-bundle.zip ./

	- name: "Build tutorial"
	run: \|
	cd antora
	make

	- name: "Build Antora documentation"
	working-directory: ./
	run: npx antora antora-ci-playbook.yml --stacktrace

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