Bump actions/cache from 3 to 4 #667

	# This workflow fails in PRs with changes to the review/api directory

	name: 'Does PR have API changes?'
	on:
	pull_request:

	jobs:
	api-changes:
	runs-on: ubuntu-latest

	env:
	NODE_VERSION: '16.x'
	CACHE_PREFIX: '1'

	steps:
	- name: Checkout repo
	uses: actions/checkout@v4

	- name: Install node
	uses: actions/setup-node@v4
	with:
	node-version: ${{ env.NODE_VERSION }}

	# Cache yarn
	- name: Get yarn cache directory path
	id: yarn-cache-dir-path
	shell: bash
	run: echo "::set-output name=dir::$(yarn cache dir)"
	- name: Cache yarn
	uses: actions/cache@v4
	id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
	with:
	path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
	key: ${{ env.CACHE_PREFIX }}-yarn-${{ env.NODE_VERSION }}-${{ hashFiles('**/yarn.lock') }}
	restore-keys: \|
	${{ env.CACHE_PREFIX }}-yarn-${{ env.NODE_VERSION }}

	- name: Run api-extractor
	shell: bash
	run: \|
	set -ex
	yarn
	yarn build
	yarn api

	- name: Dummy commit
	run: \|
	git config user.name "github-actions[bot]"
	git config user.email "github-actions[bot]@users.noreply.github.com"
	git add ./review/api/*.api.md
	git commit --allow-empty -m "API changes"

	- name: Get API changes
	id: api-changed
	uses: tj-actions/changed-files@v41.1.1
	with:
	base_sha: 'HEAD~1'
	sha: 'HEAD'
	# only checks for modified files in this directory
	files: review/api/*.api.md

	- name: Fail if API are modified
	if: steps.api-changed.outputs.any_changed == 'true'
	run: \|
	for file in ${{ steps.api-changed.outputs.all_changed_files }}; do
	echo "$file"
	done
	exit 1

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