Composer: avoid writing a lock file #142

	name: CS

	on:
	push:
	pull_request:
	# Allow manually triggering the workflow.
	workflow_dispatch:

	# Cancels all previous workflow runs for the same branch that have not yet completed.
	concurrency:
	# The concurrency group contains the workflow name and the branch name.
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	checkcs:
	name: 'Check code style'
	runs-on: ubuntu-latest

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

	- name: Install PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: 'latest'
	coverage: none
	tools: cs2pr

	# Install dependencies and handle caching in one go.
	# @link https://github.com/marketplace/actions/install-php-dependencies-with-composer
	- name: Install Composer dependencies
	uses: "ramsey/composer-install@v3"
	with:
	# Bust the cache at least once a month - output format: YYYY-MM.
	custom-cache-suffix: $(date -u "+%Y-%m")

	- name: Check PHP code style
	id: phpcs
	run: vendor/bin/phpcs --report-full --report-checkstyle=./checkstyle.xml

	- name: Show PHPCS results in PR
	if: ${{ always() && steps.phpcs.outcome == 'failure' }}
	run: cs2pr ./checkstyle.xml

	- name: Make sure no vardumps remain
	run: composer vardumpcheck

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