gistfile1.txt

def readConfig(lines:List[String]):mutable.Map[String,Map[String,String]] = {
  // assuming that *all* properties have their sections
  if (lines.isEmpty) Map()
  else {
    val sectionRgx = """\s*\[(.*)\]\s*""".r
    val sectionRgx(sectName) = lines.head
    val pairs = lines.tail.takeWhile(!_.startsWith("[")).map(_.split("=")).map(a => (a(0),a(1))).toMap
    Map(sectName -> pairs) ++ readConfig(lines.tail.dropWhile(!_.startsWith("["))
  }
}
readConfig(io.Source.fromFile("data.ini").getLines.toList)