Recursive directory listings with ignore pattern.

RecursiveListing.scala

import scala.collection.mutable.Queue
import scala.collection.mutable.ListBuffer

object RecursiveListing {

  def main(args: Array[String]) {
    val result = listing("/path/to/somewhere", Queue[String](), ListBuffer[String](), ".svn")
    print(result.size)
  }

  def listing(root: String, restDirs: Queue[String], files: ListBuffer[String], ignore: String): ListBuffer[String] = {
    val target = new java.io.File(root)
    if (target.isFile) {
      files.append(root)
      if (restDirs.isEmpty) {
        return files
      } else {
        val newroot = restDirs.dequeue()
        listing(newroot, restDirs, files, ignore)
      }
    } else {
      val dirElements = target.list.toList
      files.appendAll(dirElements.filter(f => new java.io.File(root + "/" + f).isFile).map(f => root + "/" + f))
      val partialDirs = dirElements.filter(d => new java.io.File(root + "/" + d).isDirectory && !d.contains(ignore)).map(d => root + "/" + d)
      if(restDirs.isEmpty && partialDirs.isEmpty){
    	  return files
      }else{
        partialDirs.foreach(d => restDirs.enqueue(d))
        val newroot = restDirs.dequeue
        listing(newroot, restDirs, files, ignore)
      }
    }
  }
}