List recusively directories

hdfs.scala

 def listSubdirectoriesRecursively(
    directory: Path,
    list: mutable.ListBuffer[Path] = new mutable.ListBuffer[Path]
  ): List[Path] = {

    val iterator = fs.listLocatedStatus(directory)

    while (iterator.hasNext) {
      val pathStatus = iterator.next()
      val path = pathStatus.getPath
      if (pathStatus.isDirectory)
        if (fs.getContentSummary(path).getDirectoryCount == 1)
          list += path
        else listSubdirectoriesRecursively(path, list)
    }

    list.sortBy(_.toString).toList

  }