Scala example source code file (FscSettings.scala)

This example Scala source code file (FscSettings.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

boolean, booleansetting, fscsettings, list, pathsetting, set, setting, string, stringsetting, ygenjavap

The FscSettings.scala Scala example source code

/* NSC -- new Scala compiler
 * Copyright 2005-2013 LAMP/EPFL
 * @author  Paul Phillips
 */

package scala.tools
package nsc
package settings

import util.ClassPath
import io.{ Path, AbstractFile }

class FscSettings(error: String => Unit) extends Settings(error) {
  outer =>

  locally {
    disable(prompt)
    disable(resident)
  }

  val currentDir   = StringSetting ("-current-dir", "path", "Base directory for resolving relative paths", "").internalOnly()
  val reset        = BooleanSetting("-reset",    "Reset compile server caches")
  val shutdown     = BooleanSetting("-shutdown", "Shutdown compile server")
  val server       = StringSetting ("-server",   "hostname:portnumber", "Specify compile server socket", "")
  val preferIPv4   = BooleanSetting("-ipv4",     "Use IPv4 rather than IPv6 for the server socket")
  val idleMins     = IntSetting    ("-max-idle", "Set idle timeout in minutes for fsc (use 0 for no timeout)",
                                              30, Some((0, Int.MaxValue)), (_: String) => None)

  // For improved help output, separating fsc options from the others.
  def fscSpecific = Set[Settings#Setting](
    currentDir, reset, shutdown, server, preferIPv4, idleMins
  )
  val isFscSpecific: String => Boolean = fscSpecific map (_.name)

  /** If a setting (other than a PathSetting) represents a path or paths.
   *  For use in absolutization.
   */
  private def holdsPath = Set[Settings#Setting](
    d, dependencyfile, pluginsDir, Ygenjavap
  )

  override def processArguments(arguments: List[String], processAll: Boolean): (Boolean, List[String]) = {
    val (r, args) = super.processArguments(arguments, processAll)
    // we need to ensure the files specified with relative locations are absolutized based on the currentDir
    (r, args map {a => absolutizePath(a)})
  }

  /**
   * Take an individual path and if it's not absolute turns it into an absolute path based on currentDir.
   * If it's already absolute then it's left alone.
   */
  private[this] def absolutizePath(p: String) = (Path(currentDir.value) resolve Path(p)).normalize.path

  /** All user set settings rewritten with absolute paths based on currentDir */
  def absolutize() {
    userSetSettings foreach {
      case p: OutputSetting => p.outputDirs setSingleOutput AbstractFile.getDirectory(absolutizePath(p.value))
      case p: PathSetting   => p.value = ClassPath.map(p.value, absolutizePath)
      case p: StringSetting => if (holdsPath(p)) p.value = absolutizePath(p.value)
      case _                => ()
    }
  }
}