Scala example source code file (OfflineCompilerCommand.scala)

This example Scala source code file (OfflineCompilerCommand.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

compiler, compilercommand, directory, fscsettings, list, nsc, offlinecompilercommand, pwd

The OfflineCompilerCommand.scala Scala example source code

/* NSC -- new Scala compiler
 * Copyright 2005-2013 LAMP/EPFL
 * @author  Martin Odersky
 */

package scala.tools.nsc

import settings.FscSettings
import io.Directory
import Properties.isWin

/** A compiler command for the offline compiler.
 *
 * @author Martin Odersky and Lex Spoon
 */
class OfflineCompilerCommand(arguments: List[String], settings: FscSettings) extends CompilerCommand(arguments, settings) {
  import settings.currentDir
  def extraFscArgs = List(currentDir.name, currentDir.value)

  locally {
    // if -current-dir is unset, we're on the client and need to obtain it.
    if (currentDir.isDefault) {
      // Prefer env variable PWD to system property user.dir because the former
      // deals better with paths not rooted at / (filesystem mounts.)
      // ... except on windows, because under cygwin PWD involves "/cygdrive"
      // instead of whatever it's supposed to be doing.
      val baseDirectory = {
        val pwd = System.getenv("PWD")
        if (pwd == null || isWin) Directory.Current getOrElse Directory("/")
        else Directory(pwd)
      }
      currentDir.value = baseDirectory.path
    }
    else {
      // Otherwise we're on the server and will use it to absolutize the paths.
      settings.absolutize()
    }
  }

  override def cmdName = "fsc"
  override def usageMsg = (
    createUsageMsg("where possible fsc", shouldExplain = false, x => x.isStandard && settings.isFscSpecific(x.name)) +
    "\n\nStandard scalac options also available:" +
    createUsageMsg(x => x.isStandard && !settings.isFscSpecific(x.name))
  )
}