#109 follow-up - improved error message when no source root found for specified path, shows all source root paths for easier problems detection.

Author: gslowikowski

Diff for: scalac-scoverage-plugin/src/main/scala/scoverage/IOUtils.scala

@@ -95,7 +95,9 @@ object IOUtils {
     )
     sourceRoot match {
       case Some(path: String) => src.replace(path, "")
-      case _ => throw new RuntimeException(s"No source root found for '$src'"); //TODO Change exception class
+      case _ =>
+        val fmtSourcePaths: String = sourcePaths.mkString("'", "', '", "'")
+        throw new RuntimeException(s"No source root found for '$src' (source roots: $fmtSourcePaths)");
     }
   }