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/* __ *\
** ________ ___ / / ___ Scala Ant Tasks **
** / __/ __// _ | / / / _ | (c) 2005-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.tools.ant
import org.apache.tools.ant.AntClassLoader
import org.apache.tools.ant.taskdefs.Java
import org.apache.tools.ant.types.Path
import scala.tools.nsc.Settings
import scala.tools.nsc.io.File
import scala.tools.nsc.settings.FscSettings
import scala.reflect.internal.util.ScalaClassLoader
/** An Ant task to compile with the fast Scala compiler (`fsc`).
*
* In addition to the attributes shared with the `Scalac` task, this task
* also accepts the following attributes:
* - `reset`
* - `server`
* - `shutdown`
* - `ipv4`
* - `maxIdle`
*
* @author Stephane Micheloud
*/
class FastScalac extends Scalac {
private var resetCaches: Boolean = false
private var serverAddr: Option[String] = None
private var shutdownServer: Boolean = false
private var useIPv4: Boolean = false
private var idleMinutes: Option[Int] = None
/*============================================================================*\
** Properties setters **
\*============================================================================*/
/** Sets the `reset` attribute. Used by [[http://ant.apache.org Ant]].
*
* @param input The value for `reset`.
*/
def setReset(input: Boolean) { resetCaches = input }
/** Sets the `server` attribute. Used by [[http://ant.apache.org Ant]].
*
* @param input The value for `server`.
*/
def setServer(input: String) { serverAddr = Some(input) }
/** Sets the `shutdown` attribute. Used by [[http://ant.apache.org Ant]].
*
* @param input The value for `shutdown`.
*/
def setShutdown(input: Boolean) { shutdownServer = input }
/** Sets the `ipv4` attribute. Used by [[http://ant.apache.org Ant]].
*
* @param input The value for `ipv4`.
*/
def setIPv4(input: Boolean) { useIPv4 = input }
/** Sets the `maxIdle` attribute. Used by [[http://ant.apache.org Ant]].
*
* @param input The value for `maxIdle`.
*/
def setMaxIdle(input: Int) { if (0 <= input) idleMinutes = Some(input) }
/*============================================================================*\
** The execute method **
\*============================================================================*/
override protected def newSettings(error: String=>Unit): Settings =
new FscSettings(error)
/** Performs the compilation. */
override def execute() {
val (settings, sourceFiles, javaOnly) = initialize
if (sourceFiles.isEmpty || javaOnly)
return
// initialize fsc specific settings
val s = settings.asInstanceOf[FscSettings] // safe (newSettings)
s.reset.value = resetCaches
if (!serverAddr.isEmpty) s.server.value = serverAddr.get
s.shutdown.value = shutdownServer
s.preferIPv4.value = useIPv4
if (!idleMinutes.isEmpty) s.idleMins.value = idleMinutes.get
val stringSettings =
List(
/*scalac*/
s.bootclasspath, s.classpath, s.extdirs, s.dependencyfile, s.encoding,
s.outdir, s.sourcepath,
/*fsc*/
s.server
) filter (_.value != "") flatMap (x => List(x.name, x.value))
val choiceSettings =
List(
/*scalac*/
s.debuginfo, s.target
) filter (x => x.value != x.default) map (x => s"${x.name}:${x.value}")
val booleanSettings =
List(
/*scalac*/
s.debug, s.deprecation, s.explaintypes, s.nospecialization, s.nowarn,
s.optimise, s.unchecked, s.usejavacp, s.verbose,
/*fsc*/
s.preferIPv4, s.reset, s.shutdown
) filter (_.value) map (_.name)
val intSettings =
List(
/*fsc*/
s.idleMins
) filter (x => x.value != x.default) flatMap (x => List(x.name, x.value.toString))
val phaseSetting = {
val s = settings.log
if (s.value.isEmpty) Nil
else List(s"${s.name}:${s.value.mkString(",")}")
}
val fscOptions =
stringSettings ::: choiceSettings ::: booleanSettings ::: intSettings ::: phaseSetting
val java = new Java(this)
java setFork true
// use same default memory options as in fsc script
java.createJvmarg() setValue "-Xmx256M"
java.createJvmarg() setValue "-Xms32M"
val scalacPath: Path = {
val path = new Path(getProject)
if (compilerPath.isDefined) path add compilerPath.get
else getClass.getClassLoader match {
case cl: AntClassLoader =>
path add new Path(getProject, cl.getClasspath)
case _ =>
buildError("Compilation failed because of an internal compiler error; see the error output for details.")
}
path
}
java.createJvmarg() setValue ("-Xbootclasspath/a:"+scalacPath)
s.jvmargs.value foreach (java.createJvmarg() setValue _)
val scalaHome: String = try {
val url = ScalaClassLoader.originOfClass(classOf[FastScalac]).get
File(url.getFile).jfile.getParentFile.getParentFile.getAbsolutePath
} catch {
case _: Throwable =>
buildError("Compilation failed because of an internal compiler error; couldn't determine value for -Dscala.home=<value>")
}
java.createJvmarg() setValue "-Dscala.usejavacp=true"
java.createJvmarg() setValue ("-Dscala.home="+scalaHome)
s.defines.value foreach (java.createJvmarg() setValue _)
java setClassname "scala.tools.nsc.MainGenericRunner"
java.createArg() setValue "scala.tools.nsc.CompileClient"
// Encode scalac/javac args for use in a file to be read back via "@file.txt"
def encodeScalacArgsFile(t: Traversable[String]) = t map { s =>
if(s.find(c => c <= ' ' || "\"'\\".contains(c)).isDefined)
"\"" + s.flatMap(c => (if(c == '"' || c == '\\') "\\" else "") + c ) + "\""
else s
} mkString "\n"
// dump the arguments to a file and do "java @file"
val tempArgFile = File.makeTemp("fastscalac")
val tokens = fscOptions ++ (sourceFiles map (_.getPath))
tempArgFile writeAll encodeScalacArgsFile(tokens)
val paths = List(Some(tempArgFile.toAbsolute.path), argfile).flatten map (_.toString)
val res = execWithArgFiles(java, paths)
if (failonerror && res != 0)
buildError("Compilation failed because of an internal compiler error; see the error output for details.")
}
}
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