Make the launcher initialize Jansi if it's found on the path

launch/Boot.scala

@@ -16,6 +16,7 @@ object Boot
 			case _ =>
 				System.clearProperty("scala.home") // avoid errors from mixing Scala versions in the same JVM
 				CheckProxy()
+				initJansi()
 				run(args)
 		}
 	}
@@ -45,4 +46,16 @@ object Boot
 	}
 	private def exit(code: Int): Nothing =
 		System.exit(code).asInstanceOf[Nothing]
+
+	private def initJansi() {
+		try {
+			val c = Class.forName("org.fusesource.jansi.AnsiConsole")
+			c.getMethod("systemInstall").invoke(null)
+			if (System.getProperty("sbt.log.format") eq null)
+				System.setProperty("sbt.log.format", "true")
+		} catch {
+			case ignore: ClassNotFoundException =>
+			case ex => println("Jansi found on class path but initialization failed: " + ex)
+		}
+	}
 }