docs: lazy load Mermaid and KaTeX for faster initial page load #23

	name: Docs (GitHub Pages)

	on:
	push:
	branches: [master]
	paths:
	- 'docs/**'
	- '.github/workflows/pages.yml'
	workflow_dispatch:

	permissions:
	contents: read
	pages: write
	id-token: write

	concurrency:
	group: pages
	cancel-in-progress: true

	jobs:
	deploy:
	# Only run on the original repository, not on forks
	if: github.repository == 'LessUp/cpp-high-performance-guide'
	runs-on: ubuntu-latest
	environment:
	name: github-pages
	url: ${{ steps.deploy.outputs.page_url }}
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Set up Node.js
	uses: actions/setup-node@v4
	with:
	node-version: '20'
	cache: npm
	cache-dependency-path: docs/package-lock.json

	- name: Configure GitHub Pages
	id: pages
	uses: actions/configure-pages@v5

	- name: Set VitePress base
	shell: bash
	env:
	BASE_PATH: ${{ steps.pages.outputs.base_path }}
	run: \|
	set -euo pipefail
	if [[ -z "${BASE_PATH}" ]]; then
	base="/"
	else
	base="${BASE_PATH%/}/"
	fi
	echo "VITEPRESS_BASE=${base}" >> "$GITHUB_ENV"

	- name: Install docs dependencies
	working-directory: docs
	run: npm ci

	- name: Run docs regression tests
	working-directory: docs
	run: npm test

	- name: Build docs
	working-directory: docs
	run: npm run build:pages

	- name: Add .nojekyll
	run: touch docs/.vitepress/dist/.nojekyll

	- name: Upload Pages artifact
	uses: actions/upload-pages-artifact@v3
	with:
	path: docs/.vitepress/dist

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

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