code: public static function synchronizeMigrations(CommandEvent $event)
      {
          $packages = $event->getComposer()->getRepositoryManager()
                ->getLocalRepository()->getPackages();
          $installer = $event->getComposer()->getInstallationManager();
          $appMigrationDir = self::getDestinationDir($event->getComposer());
          $io = $event->getIO();
          
          $areFileMigrated = array();
          
          //migrate for root package
          $areFileMigrated[] = self::handlePackage('.', 
                $event->getComposer()->getPackage(),
                $io, 
                $appMigrationDir);
          
          foreach($packages as $package) {
             $areFileMigrated[] = self::handlePackage($installer->getInstallPath($package),
                   $package,
                   $io, 
                   $appMigrationDir);
          }
          
          if (in_array(true, $areFileMigrated)) {
              $io->write("<warning>Some migration files have been imported. "
                    . "You should run `php app/console doctrine:migrations:status` and/or "
                    . "`php app/console doctrine:migrations:migrate` to apply them to your DB.");
          }
      }
docs: synchronize migrations files from the installed or updated bundle
  to the root bundle
  
  The destination migration dir may be configured in root package with
  `app-migrations-dir` key. Default to `app/DoctrineMigrations`
  
  The migrations files are searched in __bundle_path__/Resources/migrations
  OR in the path defined by the 'migration-source' directory in the extra
  package information defined in package's composer.json file.
  
  If the file is already present AND equal the script ask user for a confirmation
  to copy them.
  
  
  @param CommandEvent $event
  @throws \RuntimeException