protected def getMigrationPackages(modules: Seq[String] = Nil) = {
  val migratedModules = if (modules.isEmpty) {
    val deps = this.getClass.getClassLoader.getResources(".")
    val modules = new mutable.HashSet[String]
    val pattern = "^.*/modules/([A-Za-z0-9-_]+)/.*$".r
    while (deps.hasMoreElements) {
      val depPath = deps.nextElement.getPath
      depPath match {
        case pattern(module) =>
          if (!modules.contains(module)) {
            val migrationsDir = new File(s"$depPath$module/migrations")
            if (migrationsDir.exists && migrationsDir.listFiles.length > 0) {
              modules.add(module)
            }
          }
        case _ =>
      }
    }

    modules.toSeq
  } else {
    modules
  }