Resolving imports in lesscss files for dependency tracking

gistfile1.sbt

import io.Source
import java.io.File

object Stuff {
  val Import = """.*@import\s*"(.*?)".*""".r

  def allLessFiles(initial: File): Set[File] =
    Set(initial) ++ Source.fromFile(initial).getLines().flatMap[File](_ match {
      case Import(file) => allLessFiles(new File(initial.getParentFile, file))
      case _ => Set.empty
    })
}