Reset autoincrement in a custom purger not in DataFixtures.

This makes things a lot prettier in the DataFixtures.

src/Doctrine/Purger/ResetAutoIncrementPurgerFactory.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Doctrine\Purger;
+
+use Doctrine\Bundle\FixturesBundle\Purger\PurgerFactory;
+use Doctrine\Common\DataFixtures\Purger\ORMPurger;
+use Doctrine\Common\DataFixtures\Purger\PurgerInterface;
+use Doctrine\ORM\EntityManagerInterface;
+
+class ResetAutoIncrementPurgerFactory implements PurgerFactory
+{
+
+    public function createForEntityManager(?string $emName, EntityManagerInterface $em, array $excluded = [], bool $purgeWithTruncate = false) : PurgerInterface
+    {
+        $purger = new ResetAutoIncrementORMPurger($em, $excluded);
+        $purger->setPurgeMode($purgeWithTruncate ? ORMPurger::PURGE_MODE_TRUNCATE : ORMPurger::PURGE_MODE_DELETE);
+
+        return $purger;
+    }
+}