Changes required to use sbt as-is from Scala-IDE.

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

@@ -7,5 +7,5 @@ import java.io.File;
 
 public interface CachedCompiler
 {
-	public void run(File[] sources, DependencyChanges cpChanges, AnalysisCallback callback, Logger log, Reporter delegate);
+	public void run(File[] sources, DependencyChanges cpChanges, AnalysisCallback callback, Logger log, Reporter delegate, CompileProgress progress);
 }

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

@@ -6,5 +6,5 @@ import xsbti.Reporter;
 public interface CachedCompilerProvider
 {
 	ScalaInstance scalaInstance();
-	CachedCompiler newCachedCompiler(String[] arguments, Logger log, Reporter reporter, boolean resident);
+	CachedCompiler newCachedCompiler(String[] arguments, Output output, Logger log, Reporter reporter, boolean resident);
 }

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

@@ -0,0 +1,7 @@
+package xsbti.compile;
+
+public interface CompileProgress {
+	void startUnit(String phase, String unitPath);
+
+	boolean advance(int current, int total);
+}

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

@@ -5,6 +5,6 @@ import xsbti.Reporter;
 
 public interface GlobalsCache
 {
-	public CachedCompiler apply(String[] args, boolean forceNew, CachedCompilerProvider provider, Logger log, Reporter reporter);
+	public CachedCompiler apply(String[] args, Output output, boolean forceNew, CachedCompilerProvider provider, Logger log, Reporter reporter);
 	public void clear();
 }

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

@@ -11,5 +11,5 @@ public interface JavaCompiler
 	/** Compiles Java sources using the provided classpath, output directory, and additional options.
 	* If supported, the number of reported errors should be limited to `maximumErrors`.
 	* Output should be sent to the provided logger.*/
-	void compile(File[] sources, File[] classpath, File outputDirectory, String[] options, int maximumErrors, Logger log);
+	void compile(File[] sources, File[] classpath, Output output, String[] options, int maximumErrors, Logger log);
 }

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

@@ -0,0 +1,20 @@
+package xsbti.compile;
+
+import java.io.File;
+
+public interface MultipleOutput extends Output {
+
+	interface OutputGroup	{
+		/** The directory where source files are stored for this group.
+		 * Source directories should uniquely identify the group for a source file. */
+		File sourceDirectory();
+
+		/** The directory where class files should be generated.
+		* Incremental compilation will manage the class files in this directory.
+		* In particular, outdated class files will be deleted before compilation.
+		* It is important that this directory is exclusively used for one set of sources. */
+		File outputDirectory();
+	}
+
+	OutputGroup[] outputGroups();
+}

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

@@ -13,11 +13,8 @@ public interface Options
 	* This should include Scala and Java sources, which are identified by their extension. */
 	File[] sources();
 
-	/** The directory where class files should be generated.
-	* Incremental compilation will manage the class files in this directory.
-	* In particular, outdated class files will be deleted before compilation.
-	* It is important that this directory is exclusively used for one set of sources. */
-	File classesDirectory();
+	/** Output for the compilation. */
+	Output output();
 
 	/** The options to pass to the Scala compiler other than the sources and classpath to use. */
 	String[] options();

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

@@ -0,0 +1,9 @@
+package xsbti.compile;
+
+import java.io.File;
+/** Abstract interface denoting the output of the compilation. Inheritors are SingleOutput with a global output directory and
+ * MultipleOutput that specifies the output directory per source file.
+ */
+public interface Output
+{
+}

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

@@ -23,4 +23,7 @@ public interface Setup<Analysis>
 	File cacheFile();
 
 	GlobalsCache cache();
+
+	/** If returned, the progress that should be used to report scala compilation to. */
+	Maybe<CompileProgress> progress();
 }

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

@@ -0,0 +1,12 @@
+package xsbti.compile;
+
+import java.io.File;
+
+public interface SingleOutput extends Output {
+
+	/** The directory where class files should be generated.
+	* Incremental compilation will manage the class files in this directory.
+	* In particular, outdated class files will be deleted before compilation.
+	* It is important that this directory is exclusively used for one set of sources. */
+	File outputDirectory();
+}