build: add deployment previews for vega-lite documentation site #9

	# .github/workflows/deployment-preview.yml
	name: Deploy PR previews

	on:
	pull_request:
	types:
	- opened
	- reopened
	- synchronize
	- closed
	# TODO: should this be rerun on new commits?

	concurrency: preview-${{ github.ref }}

	jobs:
	# TODO: do we still want to run these on dependabot/non-human branches?
	deploy-preview-docs:
	if: github.event.action != 'closed'
	runs-on: ubuntu-20.04
	steps:
	- name: Checkout
	uses: actions/checkout@v3

	# Copied from a section of release-docs-and-schema.yml
	- name: Setup Node
	uses: actions/setup-node@v4
	with:
	cache: 'yarn'
	node-version: latest

	- name: Install NPM dependencies
	run: yarn --frozen-lockfile

	- name: Prebuild website
	run: yarn presite

	- name: Main site build script. Might need to jekyll install
	run: \|
	# Install bundle dependencies first
	pushd site && bundle install && popd
	yarn build:jekyll

	# - name: Build with Jekyll
	# uses: actions/jekyll-build-pages@v1
	# with:
	# source: site
	# destination: _site
	# End copy from a section of release-docs-and-schema.yml

	# https://github.com/actions/upload-pages-artifact?tab=readme-ov-file#file-permissions
	# - name: Fix permissions
	# run: \|
	# chmod -c -R +r "_site/" \| while read line; do
	# echo "::warning title=Invalid file permissions automatically fixed::$line"
	# done

	- name: Deploy preview and post github comment
	uses: rossjrw/pr-preview-action@v1
	with:
	source-dir: _site

	cleanup-preview-docs:
	if: github.event.action == 'closed'
	runs-on: ubuntu-20.04
	steps:
	- name: Cleanup pr-preview
	uses: rossjrw/pr-preview-action@v1
	with:
	source-dir: _site

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