diff --git a/interface/src/main/java/xsbti/CompileFailed.java b/interface/src/main/java/xsbti/CompileFailed.java
new file mode 100644
index 000000000..bb5b2a93a
--- /dev/null
+++ b/interface/src/main/java/xsbti/CompileFailed.java
@@ -0,0 +1,6 @@
+package xsbti;
+
+public abstract class CompileFailed extends RuntimeException
+{
+	public abstract String[] arguments();
+}
\ No newline at end of file
diff --git a/interface/src/test/scala/TestLogger.scala b/interface/src/test/scala/TestLogger.scala
deleted file mode 100644
index c8df588f6..000000000
--- a/interface/src/test/scala/TestLogger.scala
+++ /dev/null
@@ -1,38 +0,0 @@
-package xsbti
-
-class TestLogger extends Logger
-{
-	private val buffer = new scala.collection.mutable.ArrayBuffer[F0[Unit]]
-	def info(msg: F0[String]) = buffer("[info] ", msg)
-	def warn(msg: F0[String]) = buffer("[warn] ", msg)
-	def debug(msg: F0[String]) = buffer("[debug] ", msg)
-	def error(msg: F0[String]) = buffer("[error] ", msg)
-	def verbose(msg: F0[String]) = buffer("[verbose] ", msg)
-	def info(msg: => String) = buffer("[info] ", msg)
-	def warn(msg: => String) = buffer("[warn] ", msg)
-	def debug(msg: => String) = buffer("[debug] ", msg)
-	def error(msg: => String) = buffer("[error] ", msg)
-	def verbose(msg: => String) = buffer("[verbose] ", msg)
-	def show() { buffer.foreach(_()) }
-	def clear() { buffer.clear() }
-	def trace(t: F0[Throwable]) { buffer += f0(t().printStackTrace) }
-	private def buffer(s: String, msg: F0[String]) { buffer(s, msg()) }
-	private def buffer(s: String, msg: => String) { buffer += f0(println(s + msg)) }
-}
-object TestLogger
-{
-	def apply[T](f: Logger => T): T =
-	{
-		val log = new TestLogger
-		try { f(log) }
-		catch { case e: Exception => log.show(); throw e }
-		finally { log.clear() }
-	}
-	def apply[L <: TestLogger, T](newLogger:  => L)(f: L => T): T =
-	{
-		val log = newLogger
-		try { f(log) }
-		catch { case e: Exception => log.show(); throw e }
-		finally { log.clear() }
-	}
-}
\ No newline at end of file
diff --git a/util/log/BasicLogger.scala b/util/log/BasicLogger.scala
new file mode 100644
index 000000000..23607c8ed
--- /dev/null
+++ b/util/log/BasicLogger.scala
@@ -0,0 +1,15 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2008, 2009 Mark Harrah
+ */
+ package xsbt
+
+/** Implements the level-setting methods of Logger.*/
+abstract class BasicLogger extends Logger
+{
+	private var traceEnabledVar = true
+	private var level: Level.Value = Level.Info
+	def getLevel = level
+	def setLevel(newLevel: Level.Value) { level = newLevel }
+	def enableTrace(flag: Boolean) { traceEnabledVar = flag }
+	def traceEnabled = traceEnabledVar
+}
diff --git a/util/log/BufferedLogger.scala b/util/log/BufferedLogger.scala
new file mode 100644
index 000000000..7e8348f2d
--- /dev/null
+++ b/util/log/BufferedLogger.scala
@@ -0,0 +1,86 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2008, 2009 Mark Harrah
+ */
+ package xsbt
+
+	import scala.collection.mutable.ListBuffer
+
+/** A logger that can buffer the logging done on it and then can flush the buffer
+* to the delegate logger provided in the constructor.  Use 'startRecording' to
+* start buffering and then 'play' from to flush the buffer to the backing logger.
+*  The logging level set at the time a message is originally logged is used, not
+* the level at the time 'play' is called.
+*
+* This class assumes that it is the only client of the delegate logger.
+* */
+class BufferedLogger(delegate: Logger) extends Logger
+{
+	private[this] val buffer = new ListBuffer[LogEvent]
+	private[this] var recording = false
+
+	/** Enables buffering. */
+	def record() = { recording = true }
+	def buffer[T](f: => T): T =
+	{
+		record()
+		try { f }
+		finally { stopQuietly() }
+	}
+	def bufferQuietly[T](f: => T): T =
+	{
+		record()
+		try
+		{
+			val result = f
+			clear()
+			result
+		}
+		catch { case e => stopQuietly(); throw e }
+	}
+	private def stopQuietly() = try { stop() } catch { case e: Exception => () }
+
+	/** Flushes the buffer to the delegate logger.  This method calls logAll on the delegate
+	* so that the messages are written consecutively. The buffer is cleared in the process. */
+	def play() { delegate.logAll(buffer.readOnly); buffer.clear() }
+	/** Clears buffered events and disables buffering. */
+	def clear(): Unit = { buffer.clear(); recording = false }
+	/** Plays buffered events and disables buffering. */
+	def stop() { play(); clear() }
+
+	def setLevel(newLevel: Level.Value)
+	{
+		buffer  += new SetLevel(newLevel)
+		delegate.setLevel(newLevel)
+	}
+	def getLevel = delegate.getLevel
+	def traceEnabled = delegate.traceEnabled
+	def enableTrace(flag: Boolean)
+	{
+		buffer  += new SetTrace(flag)
+		delegate.enableTrace(flag)
+	}
+
+	def trace(t: => Throwable): Unit =
+		doBufferableIf(traceEnabled, new Trace(t), _.trace(t))
+	def success(message: => String): Unit =
+		doBufferable(Level.Info, new Success(message), _.success(message))
+	def log(level: Level.Value, message: => String): Unit =
+		doBufferable(level, new Log(level, message), _.log(level, message))
+	def logAll(events: Seq[LogEvent]): Unit =
+		if(recording)
+			buffer ++= events
+		else
+			delegate.logAll(events)
+	def control(event: ControlEvent.Value, message: => String): Unit =
+		doBufferable(Level.Info, new ControlEvent(event, message), _.control(event, message))
+	private def doBufferable(level: Level.Value, appendIfBuffered: => LogEvent, doUnbuffered: Logger => Unit): Unit =
+		doBufferableIf(atLevel(level), appendIfBuffered, doUnbuffered)
+	private def doBufferableIf(condition: => Boolean, appendIfBuffered: => LogEvent, doUnbuffered: Logger => Unit): Unit =
+		if(condition)
+		{
+			if(recording)
+				buffer += appendIfBuffered
+			else
+				doUnbuffered(delegate)
+		}
+}
\ No newline at end of file
diff --git a/util/log/ConsoleLogger.scala b/util/log/ConsoleLogger.scala
new file mode 100644
index 000000000..a7217f026
--- /dev/null
+++ b/util/log/ConsoleLogger.scala
@@ -0,0 +1,76 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2008, 2009 Mark Harrah
+ */
+ package xsbt
+
+object ConsoleLogger
+{
+	private val formatEnabled = ansiSupported && !formatExplicitlyDisabled
+
+	private[this] def formatExplicitlyDisabled = java.lang.Boolean.getBoolean("sbt.log.noformat")
+	private[this] def ansiSupported =
+		try { jline.Terminal.getTerminal.isANSISupported }
+		catch { case e: Exception => !isWindows }
+
+	private[this] def os = System.getProperty("os.name")
+	private[this] def isWindows = os.toLowerCase.indexOf("windows") >= 0
+}
+
+/** A logger that logs to the console.  On supported systems, the level labels are
+* colored. */
+class ConsoleLogger extends BasicLogger
+{
+	import ConsoleLogger.formatEnabled
+	def messageColor(level: Level.Value) = Console.RESET
+	def labelColor(level: Level.Value) =
+		level match
+		{
+			case Level.Error => Console.RED
+			case Level.Warn => Console.YELLOW
+			case _ => Console.RESET
+		}
+	def successLabelColor = Console.GREEN
+	def successMessageColor = Console.RESET
+	override def success(message: => String)
+	{
+		if(atLevel(Level.Info))
+			log(successLabelColor, Level.SuccessLabel, successMessageColor, message)
+	}
+	def trace(t: => Throwable): Unit =
+		System.out.synchronized
+		{
+			if(traceEnabled)
+				t.printStackTrace
+		}
+	def log(level: Level.Value, message: => String)
+	{
+		if(atLevel(level))
+			log(labelColor(level), level.toString, messageColor(level), message)
+	}
+	private def setColor(color: String)
+	{
+		if(formatEnabled)
+			System.out.synchronized { System.out.print(color) }
+	}
+	private def log(labelColor: String, label: String, messageColor: String, message: String): Unit =
+		System.out.synchronized
+		{
+			for(line <- message.split("""\n"""))
+			{
+				setColor(Console.RESET)
+				System.out.print('[')
+				setColor(labelColor)
+				System.out.print(label)
+				setColor(Console.RESET)
+				System.out.print("] ")
+				setColor(messageColor)
+				System.out.print(line)
+				setColor(Console.RESET)
+				System.out.println()
+			}
+		}
+
+	def logAll(events: Seq[LogEvent]) = System.out.synchronized { events.foreach(log) }
+	def control(event: ControlEvent.Value, message: => String)
+		{ log(labelColor(Level.Info), Level.Info.toString, Console.BLUE, message) }
+}
\ No newline at end of file
diff --git a/util/log/Level.scala b/util/log/Level.scala
new file mode 100644
index 000000000..86abc257d
--- /dev/null
+++ b/util/log/Level.scala
@@ -0,0 +1,25 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2008, 2009 Mark Harrah
+ */
+ package xsbt
+
+/** An enumeration defining the levels available for logging.  A level includes all of the levels
+* with id larger than its own id.  For example, Warn (id=3) includes Error (id=4).*/
+object Level extends Enumeration with NotNull
+{
+	val Debug = Value(1, "debug")
+	val Info = Value(2, "info")
+	val Warn = Value(3, "warn")
+	val Error = Value(4, "error")
+	/** Defines the label to use for success messages.  A success message is logged at the info level but
+	* uses this label.  Because the label for levels is defined in this module, the success
+	* label is also defined here. */
+	val SuccessLabel = "success"
+
+	// added because elements was renamed to iterator in 2.8.0 nightly
+	def levels = Debug :: Info :: Warn :: Error :: Nil
+	/** Returns the level with the given name wrapped in Some, or None if no level exists for that name. */
+	def apply(s: String) = levels.find(s == _.toString)
+	/** Same as apply, defined for use in pattern matching. */
+	private[xsbt] def unapply(s: String) = apply(s)
+}
\ No newline at end of file
diff --git a/util/log/LogEvent.scala b/util/log/LogEvent.scala
new file mode 100644
index 000000000..19a5b24db
--- /dev/null
+++ b/util/log/LogEvent.scala
@@ -0,0 +1,17 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2008, 2009 Mark Harrah
+ */
+ package xsbt
+
+sealed trait LogEvent extends NotNull
+final class Success(val msg: String) extends LogEvent
+final class Log(val level: Level.Value, val msg: String) extends LogEvent
+final class Trace(val exception: Throwable) extends LogEvent
+final class SetLevel(val newLevel: Level.Value) extends LogEvent
+final class SetTrace(val enabled: Boolean) extends LogEvent
+final class ControlEvent(val event: ControlEvent.Value, val msg: String) extends LogEvent
+
+object ControlEvent extends Enumeration
+{
+	val Start, Header, Finish = Value
+}
\ No newline at end of file
diff --git a/util/log/Logger.scala b/util/log/Logger.scala
index b5203acb8..153596f6f 100644
--- a/util/log/Logger.scala
+++ b/util/log/Logger.scala
@@ -3,13 +3,14 @@
  */
  package xsbt
 
-abstract class Logger extends NotNull
+	import xsbti.{Logger => xLogger, F0}
+abstract class Logger extends xLogger with NotNull
 {
 	def getLevel: Level.Value
 	def setLevel(newLevel: Level.Value)
 	def enableTrace(flag: Boolean)
 	def traceEnabled: Boolean
-	
+
 	def atLevel(level: Level.Value) = level.id >= getLevel.id
 	def trace(t: => Throwable): Unit
 	final def debug(message: => String): Unit = log(Level.Debug, message)
@@ -19,7 +20,7 @@ abstract class Logger extends NotNull
 	def success(message: => String): Unit
 	def log(level: Level.Value, message: => String): Unit
 	def control(event: ControlEvent.Value, message: => String): Unit
-	
+
 	def logAll(events: Seq[LogEvent]): Unit
 	/** Defined in terms of other methods in Logger and should not be called from them. */
 	final def log(event: LogEvent)
@@ -34,38 +35,11 @@ abstract class Logger extends NotNull
 			case c: ControlEvent => control(c.event, c.msg)
 		}
 	}
+
+	def debug(msg: F0[String]): Unit = log(Level.Debug, msg)
+	def warn(msg: F0[String]): Unit = log(Level.Warn, msg)
+	def info(msg: F0[String]): Unit = log(Level.Info, msg)
+	def error(msg: F0[String]): Unit = log(Level.Error, msg)
+	def trace(msg: F0[Throwable]) = trace(msg.apply)
+	def log(level: Level.Value, msg: F0[String]): Unit = log(level, msg.apply)
 }
-
-sealed trait LogEvent extends NotNull
-final class Success(val msg: String) extends LogEvent
-final class Log(val level: Level.Value, val msg: String) extends LogEvent
-final class Trace(val exception: Throwable) extends LogEvent
-final class SetLevel(val newLevel: Level.Value) extends LogEvent
-final class SetTrace(val enabled: Boolean) extends LogEvent
-final class ControlEvent(val event: ControlEvent.Value, val msg: String) extends LogEvent
-
-object ControlEvent extends Enumeration
-{
-	val Start, Header, Finish = Value
-}
-
-/** An enumeration defining the levels available for logging.  A level includes all of the levels
-* with id larger than its own id.  For example, Warn (id=3) includes Error (id=4).*/
-object Level extends Enumeration with NotNull
-{
-	val Debug = Value(1, "debug")
-	val Info = Value(2, "info")
-	val Warn = Value(3, "warn")
-	val Error = Value(4, "error")
-	/** Defines the label to use for success messages.  A success message is logged at the info level but
-	* uses this label.  Because the label for levels is defined in this module, the success
-	* label is also defined here. */
-	val SuccessLabel = "success"
-	
-	// added because elements was renamed to iterator in 2.8.0 nightly
-	def levels = Debug :: Info :: Warn :: Error :: Nil
-	/** Returns the level with the given name wrapped in Some, or None if no level exists for that name. */
-	def apply(s: String) = levels.find(s == _.toString)
-	/** Same as apply, defined for use in pattern matching. */
-	private[xsbt] def unapply(s: String) = apply(s)
-}
\ No newline at end of file