move modules around.

internal/util-interface/src/main/java/xsbti/F0.java

@@ -0,0 +1,9 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2009  Mark Harrah
+ */
+package xsbti;
+
+public interface F0<T>
+{
+	T apply();
+}

internal/util-interface/src/main/java/xsbti/Logger.java

@@ -0,0 +1,13 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2009  Mark Harrah
+ */
+package xsbti;
+
+public interface Logger
+{
+	void error(F0<String> msg);
+	void warn(F0<String> msg);
+	void info(F0<String> msg);
+	void debug(F0<String> msg);
+	void trace(F0<Throwable> exception);
+}

internal/util-interface/src/main/java/xsbti/Maybe.java

@@ -0,0 +1,30 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2008, 2009, 2010  Mark Harrah
+ */
+package xsbti;
+
+/** Intended as a lightweight carrier for scala.Option. */
+public abstract class Maybe<t>
+{
+	// private pending Scala bug #3642
+	protected Maybe() {}
+
+	public static <s> Maybe<s> just(final s v)
+	{
+		return new Maybe<s>() {
+			public boolean isDefined() { return true; }
+			public s get() { return v; }
+		};
+	}
+	public static <s> Maybe<s> nothing()
+	{
+		return new Maybe<s>() {
+			public boolean isDefined() { return false; }
+			public s get() { throw new UnsupportedOperationException("nothing.get"); }
+		};
+	}
+
+	public final boolean isEmpty() { return !isDefined(); }
+	public abstract boolean isDefined();
+	public abstract t get();
+}

internal/util-interface/src/main/java/xsbti/Position.java

@@ -0,0 +1,18 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2008, 2009, 2010  Mark Harrah
+ */
+package xsbti;
+
+public interface Position
+{
+	Maybe<Integer> line();
+	String lineContent();
+	Maybe<Integer> offset();
+
+	// pointer to the column position of the error/warning
+	Maybe<Integer> pointer();
+	Maybe<String> pointerSpace();
+
+	Maybe<String> sourcePath();
+	Maybe<java.io.File> sourceFile();	
+}

internal/util-interface/src/main/java/xsbti/Problem.java

@@ -0,0 +1,12 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2008, 2009, 2010  Mark Harrah
+ */
+package xsbti;
+
+public interface Problem
+{
+	String category();
+	Severity severity();
+	String message();
+	Position position();
+}

internal/util-interface/src/main/java/xsbti/Severity.java

@@ -0,0 +1,9 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2008, 2009, 2010  Mark Harrah
+ */
+package xsbti;
+
+public enum Severity
+{
+	Info, Warn, Error
+}