Sniffer.php

<?php
/**
 * PHP Composter PHP Code Sniffer WordPress Coding Standards Action.
 *
 * @package   PHPComposter\PHPComposter_PHPCS_WPCS
 * @author    Gabor Javorszky <gabor@javorszky.co.uk>
 * @license   MIT
 * @link      https://javorszky.co.uk
 * @copyright 2017 Gabor Javorszky
 */

namespace PHPComposter\PHPComposter_PHPCS_WPCS;

use PHP_CodeSniffer_CLI;
use PHPComposter\PHPComposter\BaseAction;

/**
 * Class Sniffer.
 *
 * @since   0.1.0
 *
 * @package PHPComposter\PHPComposter_PHPCS_WPCS
 * @author    Gabor Javorszky <gabor@javorszky.co.uk>
 */
class Sniffer extends BaseAction
{

    /**
     * Run PHP Code Sniffer over PHP files as pre-commit hook.
     *
     * @since 0.1.0
     */
    public function preCommit()
    {
        $files = $this->getStagedFiles('/*.php$');
        if (empty($files)) {
            return;
        }

        echo 'Running PHP CodeSniffer in ' . $this->root . PHP_EOL;
        $sniffer = new PHP_CodeSniffer_CLI();
        @$config = $this->getExtraKey('php-composter-phpcs-wpcs', [
            'standard' => 'WordPress-Extra'
        ]);

        ob_start();
        $numErrors = $sniffer->process([
            'standard' => $config['standard'],
            'files' => $files
        ]);
        $output    = ob_get_clean();

        echo $output . PHP_EOL;

        if ($numErrors === 0) {
            exit(0);
        } else {
            echo 'PHP Code Sniffer found errors! Aborting Commit.' . PHP_EOL;
            exit(1);
        }
    }
}