feat: add sideeffects; part 5 #6700

	name: Demo build

	on:
	pull_request:
	branches:
	- master
	push:
	branches:
	- master

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

	jobs:
	build:
	name: Demo build

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	with:
	lfs: true
	fetch-depth: 3

	- name: Set PR head SHA
	run: \|
	if [ "${{ github.event.pull_request.head.sha }}" != '' ];
	then
	echo "PR_LAST_COMMIT_SHA=$(echo "${{ github.event.pull_request.head.sha }}")" >> $GITHUB_ENV
	fi

	- name: Install dependencies
	run: yarn

	- name: Run lint
	run: yarn lint

	- name: Run build
	id: demo_build
	run: node ./bin/demo-build.js

	- name: Publish storybook
	run: \|
	cd ./storybook-demo
	git push -q -f "https://core-ds-bot:${{ secrets.BOT_AUTH_TOKEN }}@github.com/core-ds/core-components.git" master:gh-pages

	# Ищем открытый PR
	- name: Find open PR
	uses: jwalton/gh-find-current-pr@v1
	id: find_pr
	with:
	github-token: ${{ secrets.BOT_AUTH_TOKEN }}

	# Если нашли открытый PR, то добавляем коммент с ссылкой на демку.
	# storybook_url заполняется в demo-build.js
	- name: Create comment
	if: success() && steps.find_pr.outputs.number
	uses: peter-evans/create-or-update-comment@v3
	with:
	token: ${{ secrets.BOT_AUTH_TOKEN }}
	issue-number: ${{ steps.find_pr.outputs.pr }}
	body: \|
	Собрана новая [демка](${{ steps.demo_build.outputs.storybook_url }}).
	reactions: 'rocket'

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