GH Actions: harden the workflow against PHPCS ruleset errors #160

	name: Coding Standards

	on:
	# Run on all pushes for default branch and on all pull requests.
	# Prevent the build from running when there are only irrelevant changes.
	push:
	branches:
	- master
	paths-ignore:
	- '**.md'
	- '**.txt'
	pull_request:
	paths-ignore:
	- '**.md'
	- '**.txt'
	# Allow manually triggering the workflow.
	workflow_dispatch:

	jobs:
	checkcs:
	name: 'PHPCS check'
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v3

	- name: Install PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: '7.4'
	tools: cs2pr
	coverage: none

	# Install dependencies and handle caching in one go.
	# @link https://github.com/marketplace/actions/install-composer-dependencies
	- name: Install Composer dependencies
	uses: "ramsey/composer-install@v2"

	# Check the code-style consistency of the PHP files.
	- name: Check PHP code style
	id: phpcs
	run: vendor/bin/phpcs -- --report-full --report-checkstyle=./phpcs-report.xml

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

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