From 9ebb9525255c0d76f6eaac85dddd51d3b15c867e Mon Sep 17 00:00:00 2001
From: Mark Harrah <dmharrah@gmail.com>
Date: Wed, 13 Mar 2013 12:40:03 -0400
Subject: [PATCH] Logger.Null that discards logged messages

---
 util/log/src/main/scala/sbt/Logger.scala | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/util/log/src/main/scala/sbt/Logger.scala b/util/log/src/main/scala/sbt/Logger.scala
index 7715b80db..29d965e76 100644
--- a/util/log/src/main/scala/sbt/Logger.scala
+++ b/util/log/src/main/scala/sbt/Logger.scala
@@ -40,6 +40,21 @@ abstract class AbstractLogger extends Logger
 
 object Logger
 {
+	// make public in 0.13
+	private[sbt] val Null: AbstractLogger = new AbstractLogger {
+		def getLevel: Level.Value = Level.Error
+		def setLevel(newLevel: Level.Value) {}
+		def getTrace = 0
+		def setTrace(flag: Int) {}
+		def successEnabled = false
+		def setSuccessEnabled(flag: Boolean) {}
+		def control(event: ControlEvent.Value, message: => String) {}
+		def logAll(events: Seq[LogEvent]) {}
+		def trace(t: => Throwable) {}
+		def success(message: => String) {}
+		def log(level: Level.Value, message: => String) {}
+	}
+
 	implicit def absLog2PLog(log: AbstractLogger): ProcessLogger = new BufferedLogger(log) with ProcessLogger
 	implicit def log2PLog(log: Logger): ProcessLogger = absLog2PLog(new FullLogger(log))
 	implicit def xlog2Log(lg: xLogger): Logger = new Logger {