rector.php

<?php declare(strict_types=1);

use Rector\CodeQuality\Rector\Concat\JoinStringConcatRector;
use Rector\Core\Configuration\Option;
use Rector\Set\ValueObject\SetList;
use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;

return static function (ContainerConfigurator $containerConfigurator): void {
    $containerConfigurator->import(SetList::CODE_QUALITY);
    $containerConfigurator->import(SetList::PHP_71);

    $parameters = $containerConfigurator->parameters();

    $parameters->set(Option::SKIP, [
        // skip csv test file to keep `\r` and `\n` for readability
        JoinStringConcatRector::class => [
            // single file
            __DIR__ . '/tests/Unit/CSVArrayTest.php',
        ],
    ]);

    // paths to refactor; solid alternative to CLI arguments
    $parameters->set(Option::PATHS, [__DIR__ . '/src', __DIR__ . '/tests']);

    // Path to phpstan with extensions, that PHPSTan in Rector uses to determine types
    $parameters->set(Option::PHPSTAN_FOR_RECTOR_PATH, getcwd() . '/phpstan-for-config.neon');
};