Merge pull request #1702 from jsuereth/wip/incremental-compiler-javac-cleanup

Create a new API for calling Java toolchains.

interface/src/main/java/xsbti/compile/JavaCompiler.java

@@ -2,6 +2,7 @@ package xsbti.compile;
 
 import java.io.File;
 import xsbti.Logger;
+import xsbti.Reporter;
 
 /** 
 * Interface to a Java compiler.
@@ -9,6 +10,17 @@ import xsbti.Logger;
 public interface JavaCompiler
 {
 	/** Compiles Java sources using the provided classpath, output directory, and additional options.
-	* Output should be sent to the provided logger.*/
+	 * Output should be sent to the provided logger.
+     *
+     * @deprecated 0.13.8 - Use compileWithReporter instead
+     */
 	void compile(File[] sources, File[] classpath, Output output, String[] options, Logger log);
-}
+
+    /**
+     * Compiles java sources using the provided classpath, output directory and additional options.
+     *
+     * Output should be sent to the provided logger.
+     * Failures should be passed to the provided Reporter.
+     */
+    void compileWithReporter(File[] sources, File[] classpath, Output output, String[] options, Reporter reporter, Logger log);
+}

util/log/src/main/scala/sbt/Logger.scala

@@ -104,6 +104,7 @@ object Logger {
       val position = pos
       val message = msg
       val severity = sev
+      override def toString = s"[$severity] $pos: $message"
     }
 }