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/* NSC -- new Scala compiler
* Copyright 2005-2007 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc
import java.io.{BufferedOutputStream, File, FileOutputStream, PrintStream}
import java.lang.{Runtime, System, Thread}
import scala.concurrent.Process.spawn
import scala.tools.nsc.doc.DocGenerator
import scala.tools.nsc.reporters.{Reporter, ConsoleReporter}
import scala.tools.nsc.util.FakePos //Position
import scala.tools.util.SocketServer
/** The main class for NSC, a compiler for the programming
* language Scala.
*
* @author Martin Odersky
* @version 1.0
*/
object CompileServer extends SocketServer {
val versionMsg = "Fast Scala compiler " +
Properties.versionString + " -- " +
Properties.copyrightString
val MaxCharge = 0.8
var shutDown: boolean = false
private var compiler: Global = null
private var inSession: boolean = false
private var progress: boolean = false
private def settingsAreCompatible(s1: Settings, s2: Settings) =
s1.encoding.value == s2.encoding.value &&
s1.classpath.value == s2.classpath.value &&
s1.sourcepath.value == s2.sourcepath.value &&
s1.outdir.value == s2.outdir.value &&
s1.bootclasspath.value == s2.bootclasspath.value &&
s1.extdirs.value == s2.extdirs.value
private def exit(code: int): Nothing = {
System.err.close()
System.out.close()
Predef.exit(code)
}
private def spawnWatchDog(): unit = spawn {
while (true) {
Thread.sleep(10000)
if (!CompileSocket.portFile(port).exists() && !inSession) {
progress = false
spawn {
Thread.sleep(10000)
if (!progress)
fatal("port file no longer exists; exiting")
}
}
}
}
private val runtime = Runtime.getRuntime()
var reporter: ConsoleReporter = _
def session(): unit = {
System.out.println("New session" +
", total memory = "+ runtime.totalMemory() +
", max memory = " + runtime.maxMemory() +
", free memory = " + runtime.freeMemory)
val password = CompileSocket.getPassword(port)
val guessedPassword = in.readLine()
val input = in.readLine()
if ((input ne null) && password == guessedPassword) {
try {
inSession = true
progress = true
val args = input.split("\0").toList
if (args contains "-shutdown") {
out.println("[Scala compile server exited]")
shutDown = true
return
}
if (args contains "-reset") {
out.println("[Scala compile server was reset]")
compiler = null
return
}
def error(msg: String): unit =
reporter.error(/*new Position*/ FakePos("fsc"),
msg + "\n fsc -help gives more information")
val command = new CompilerCommand(args, error, false) {
override val cmdName = "fsc"
settings.disable(settings.prompt)
settings.disable(settings.resident)
new settings.BooleanSetting("-reset", "Reset compile server caches")
new settings.BooleanSetting("-shutdown", "Shutdown compile server")
new settings.StringSetting("-server", "hostname:portnumber",
"Specify compile server socket", "")
new settings.BooleanSetting("-J<flag>", "Pass <flag> directly to runtime system")
}
reporter = new ConsoleReporter(command.settings, in, out) {
// disable prompts, so that compile server cannot block
override def displayPrompt = {}
}
if (command.settings.version.value)
reporter.info(null, versionMsg, true)
else if (command.settings.help.value)
reporter.info(null, command.usageMsg, true)
else if (command.files.isEmpty)
reporter.info(null, command.usageMsg, true)
else {
try {
if ((compiler ne null) && settingsAreCompatible(command.settings, compiler.settings)) {
compiler.settings = command.settings
compiler.reporter = reporter
} else {
if (args contains "-verbose")
out.println("[Starting new Scala compile server instance]")
compiler = new Global(command.settings, reporter) {
override def inform(msg: String) = out.println(msg)
}
}
val c = compiler
val run = new c.Run
run compile command.files
} catch {
case ex @ FatalError(msg) =>
if (command.settings.debug.value)
ex.printStackTrace(out);
reporter.error(null, "fatal error: " + msg)
compiler = null
case ex: Throwable =>
ex.printStackTrace(out);
reporter.error(null, "fatal error (server aborted): " + ex.getMessage())
shutDown = true
}
reporter.printSummary()
runtime.gc()
if ((runtime.totalMemory() - runtime.freeMemory()).toDouble /
runtime.maxMemory().toDouble > MaxCharge) compiler = null
}
} finally {
inSession = false
}
}
}
def redirect(setter: PrintStream => unit, filename: String): unit =
setter(
new PrintStream(
new BufferedOutputStream(
new FileOutputStream(
new File(System.getProperty("java.io.tmpdir"), filename)))))
def main(args: Array[String]): unit = {
redirect(System.setOut, "scala-compile-server-out.log")
redirect(System.setErr, "scala-compile-server-err.log")
System.err.println("...starting server on socket "+port+"...")
System.err.flush()
spawnWatchDog()
CompileSocket.setPort(port)
run()
CompileSocket.deletePort(port)
exit(0)
}
}
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