Bump actions/checkout from 3 to 4 #18

	name: Continuous Integration

	on:
	push:
	branches:
	- main
	pull_request:

	jobs:
	CheckFormat:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- uses: oprypin/install-crystal@v1
	with:
	crystal: latest

	- name: Format
	run: crystal tool format --check

	- name: Set up Crystal cache
	uses: actions/cache@v3
	id: crystal-cache
	with:
	path: \|
	~/.cache/crystal
	bin/ameba
	lib
	key: ${{ runner.os }}-crystal-${{ hashFiles('**/shard.yml') }}
	restore-keys: \|
	${{ runner.os }}-crystal-

	- name: Install shards
	if: steps.crystal-cache.outputs.cache-hit != 'true'
	run: shards check \|\| shards install --ignore-crystal-version

	- name: Run ameba linter
	run: ./bin/ameba

	RunSpecs:
	runs-on: ubuntu-latest

	strategy:
	fail-fast: true
	matrix:
	crystal_version:
	- 1.2.0
	- latest
	experimental:
	- false
	include:
	- crystal_version: nightly
	experimental: true

	steps:
	- uses: actions/checkout@v4

	- uses: oprypin/install-crystal@v1
	with:
	crystal: ${{ matrix.crystal_version }}

	- name: Set up Crystal cache
	uses: actions/cache@v3
	id: crystal-cache
	with:
	path: \|
	~/.cache/crystal
	bin/ameba
	lib
	key: ${{ runner.os }}-crystal-${{ matrix.crystal_version }}-${{ hashFiles('**/shard.yml') }}
	restore-keys: \|
	${{ runner.os }}-crystal-

	- name: Install shards
	if: steps.crystal-cache.outputs.cache-hit != 'true'
	run: shards check \|\| shards install --ignore-crystal-version

	- name: Run tests
	run: crystal spec

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