Scala script - template script

ScalaScriptTemplate.scala

#!/bin/bash
#-*- mode: scala; -*-

#####
##### NOTE: save this script WITHOUT EXTENSION onto the file system.
#####

launcher=$(which sbt-launch.jar)
if [ -z "$launcher" ] ;then
  pushd /tmp
  if [ ! -f sbt-launch.jar ] ;then
    wget http://dl.bintray.com/typesafe/ivy-releases/org.scala-sbt/sbt-launch/0.13.9/sbt-launch.jar
  fi
  popd
  launcher=/tmp/sbt-launch.jar
fi

exec java \
     -Dsbt.main.class=sbt.ScriptMain \
     -Dsbt.boot.directory=${HOME}/.sbt/boot \
     -Dsbt.log.noformat=true \
     -jar ${launcher} --error "$0" "+ $*" # see: https://github.com/sbt/sbt/issues/2257
!#
/***
  scalaVersion := "2.11.7"
  resolvers ++=
    Seq(
      //XXX Resolver.file("Local Ivy", file(Path.userHome.absolutePath + "/.ivy2/local"))(Resolver.ivyStylePatterns),
      Resolver.jcenterRepo)
  libraryDependencies ++=
    Seq(
      "org.mongodb" %% s"casbah-core" % s"2.7.4")
*/


import com.mongodb.casbah.Imports._

trait Runner {
  val dbServerNames   : String
  val databaseName    : String
  val collectionName  : String

  def exec(os: java.io.OutputStream): Int = {
    val pw = new java.io.PrintWriter(os)
    pw.write(s"${dbServerNames}\n")
    pw.write(s"${databaseName}\n")
    pw.write(s"${collectionName}\n")
    pw.flush
    recs
  }
}


val runner = new {
  val dbServerNames   : String = "localhost"
  val databaseName    : String = "db"
  val collectionName  : String = "collection"
} with Runner


import java.io._
val os =
  (args diff Seq("+")).headOption match {
    case Some(name) => new FileOutputStream(new File(name))
    case _ => System.out
  }

runner.exec(os)