✏️ Editing: Migrator.php Read Only

<?php declare(strict_types=1);
/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PHPUnit\TextUI\XmlConfiguration;

use PHPUnit\Runner\Version;
use PHPUnit\Util\Xml\Loader as XmlLoader;
use PHPUnit\Util\Xml\XmlException;

/**
 * @no-named-arguments Parameter names are not covered by the backward compatibility promise for PHPUnit
 *
 * @internal This class is not covered by the backward compatibility promise for PHPUnit
 */
final class Migrator
{
    /**
     * @throws Exception
     * @throws MigrationException
     * @throws XmlException
     */
    public function migrate(string $filename): string
    {
        $origin = (new SchemaDetector)->detect($filename);

if (!$origin->detected()) {
            throw new Exception('The file does not validate against any known schema');
        }

if ($origin->version() === Version::series()) {
            throw new Exception('The file does not need to be migrated');
        }

$configurationDocument = (new XmlLoader)->loadFile($filename);

foreach ((new MigrationBuilder)->build($origin->version()) as $migration) {
            $migration->migrate($configurationDocument);
        }

$configurationDocument->formatOutput       = true;
        $configurationDocument->preserveWhiteSpace = false;

return $configurationDocument->saveXML();
    }
}

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