print-warnings task for Scala 2.10+ to avoid needing to rerun 'compile' to see deprecation/unchecked warnings

interface/src/main/java/xsbti/AnalysisCallback.java

@@ -24,4 +24,7 @@ public interface AnalysisCallback
 	public void endSource(File sourcePath);
 	/** Called when the public API of a source file is extracted. */
 	public void api(File sourceFile, xsbti.api.SourceAPI source);
+	/** Provides problems discovered during compilation.  These may be reported (logged) or unreported.
+	* Unreported problems are usually unreported because reporting was not enabled via a command line switch. */
+	public void problem(Position pos, String msg, Severity severity, boolean reported);
 }

interface/src/test/scala/TestCallback.scala

@@ -20,4 +20,5 @@ class TestCallback extends AnalysisCallback
 	def endSource(source: File) { endedSources += source }
 
 	def api(source: File, sourceAPI: xsbti.api.SourceAPI) { apis += ((source, sourceAPI)) }
+	def problem(pos: xsbti.Position, message: String, severity: xsbti.Severity, reported: Boolean) {}
 }

util/log/Logger.scala

@@ -4,6 +4,9 @@
  package sbt
 
 	import xsbti.{Logger => xLogger, F0}
+	import xsbti.{Maybe,Position,Problem,Severity}
+
+	import java.io.File
 
 abstract class AbstractLogger extends Logger
 {
@@ -61,6 +64,28 @@ object Logger
 		}
 	}
 	def f0[T](t: =>T): F0[T] = new F0[T] { def apply = t }
+
+	def m2o[S](m: Maybe[S]): Option[S] = if(m.isDefined) Some(m.get) else None
+	def o2m[S](o: Option[S]): Maybe[S] = o match { case Some(v) => Maybe.just(v); case None => Maybe.nothing() }
+
+	def position(line0: Option[Integer], content: String, offset0: Option[Integer], pointer0: Option[Integer], pointerSpace0: Option[String], sourcePath0: Option[String], sourceFile0: Option[File]): Position =
+		new Position {
+			val line = o2m(line0)
+			val lineContent = content
+			val offset = o2m(offset0)
+			val pointer = o2m(pointer0)
+			val pointerSpace = o2m(pointerSpace0)
+			val sourcePath = o2m(sourcePath0)
+			val sourceFile = o2m(sourceFile0)
+		}
+
+	def problem(pos: Position, msg: String, sev: Severity): Problem =
+		new Problem
+		{
+			val position = pos
+			val message = msg
+			val severity = sev
+		}
 }
 
 /** This is intended to be the simplest logging interface for use by code that wants to log.