pathRegex.scala

// define your regex groups: one that grabs everything from the end of the line,
// and another group that grabs everything else...
val pathExtractor = """(.*/)(.*)$""".r

// then you can use unapply like this...
val pathExtractor(path, file) = "some/long/path/file.ext"

// or like this (recommended)
"some/long/path/file.ext" match {
  case pathExtractor(p, f) => p -> f
  case _ => ("NO_PATH", "NO_FILE")
}