Cache #2081

	name: Cache

	on:
	push:
	paths:
	- .github/workflows/cache.yml
	schedule:
	- cron: "0 /6 * *" # every 6 hours

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

	jobs:
	update:
	if: startsWith(github.repository, 'Homebrew/')
	strategy:
	matrix:
	os:
	- macos-11.0
	- ubuntu-latest
	runs-on: ${{ matrix.os }}
	steps:
	- name: Set up Homebrew
	id: set-up-homebrew
	uses: Homebrew/actions/setup-homebrew@master
	with:
	test-bot: false

	# Workaround until the `cache` action uses the changes from
	# https://github.com/actions/toolkit/pull/580.
	- name: Unlink workspace
	run: \|
	rm "${GITHUB_WORKSPACE}"
	mkdir "${GITHUB_WORKSPACE}"

	- name: Cache Homebrew Gems
	id: cache
	uses: actions/cache@v2.1.7
	with:
	path: ${{ steps.set-up-homebrew.outputs.gems-path }}
	key: ${{ runner.os }}-rubygems-${{ steps.set-up-homebrew.outputs.gems-hash }}
	restore-keys: ${{ runner.os }}-rubygems-

	- name: Install Homebrew Gems
	id: gems
	run: brew install-bundler-gems
	if: steps.cache.outputs.cache-hit != 'true'

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