Switch to PHPCSStandards/PHP_CodeSniffer #70

	name: CI

	on:
	# Run on all pushes and pull requests.
	push:
	branches:
	- main
	pull_request:
	# Also run this workflow on day 10 of every month as the repo isn't that active.
	schedule:
	- cron: '0 0 10 * *'
	# Allow manually triggering the workflow.
	workflow_dispatch:

	jobs:
	xmllint:
	name: 'Check install and XML'
	runs-on: ubuntu-latest

	env:
	XMLLINT_INDENT: ' '

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

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

	# Install dependencies to make sure the PHPCS XSD file is available.
	- name: Install dependencies
	run: composer install --prefer-dist --no-interaction --no-progress

	- name: Setup xmllint
	run: \|
	sudo apt-get update
	sudo apt-get install --no-install-recommends -y libxml2-utils

	# Show violations inline in the file diff.
	# @link https://github.com/marketplace/actions/xmllint-problem-matcher
	- name: Enable showing XML issues inline
	uses: korelstar/xmllint-problem-matcher@v1

	# Validate the composer.json file.
	# @link https://getcomposer.org/doc/03-cli.md#validate
	- name: Validate Composer installation
	run: composer validate --no-check-all --strict

	# Validate the xml file.
	# @link http://xmlsoft.org/xmllint.html
	- name: Validate against schema
	run: xmllint --noout --schema vendor/phpcsstandards/php_codesniffer/phpcs.xsd PHPCSDev/ruleset.xml

	# Check the code-style consistency of the xml file.
	- name: Check code style
	run: diff -B ./PHPCSDev/ruleset.xml <(xmllint --format "./PHPCSDev/ruleset.xml")

Provide feedback