Render file name and position in errors from JS library stubs

Original commit: bcc6843835

jps/jps-plugin/src/org/jetbrains/jet/jps/build/KotlinBuilder.java

@@ -16,7 +16,6 @@
 
 package org.jetbrains.jet.jps.build;
 
-import com.google.common.collect.Maps;
 import com.intellij.openapi.util.Key;
 import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.util.text.StringUtil;
@@ -288,7 +287,7 @@ public class KotlinBuilder extends ModuleLevelBuilder {
             context.processMessage(new CompilerMessage(
                     CompilerRunnerConstants.KOTLIN_COMPILER_NAME,
                     kind(severity),
-                    prefix + message,
+                    prefix + message + renderLocationIfNeeded(location),
                     location.getPath(),
                     -1, -1, -1,
                     location.getLine(),
@@ -296,6 +295,16 @@ public class KotlinBuilder extends ModuleLevelBuilder {
             ));
         }
 
+        private static String renderLocationIfNeeded(@NotNull CompilerMessageLocation location) {
+            if (location == NO_LOCATION) return "";
+
+            // Sometimes we report errors in JavaScript library stubs, i.e. files like core/javautil.kt
+            // IDEA can't find these files, and does not display paths in Messages View, so we add the position information
+            // to the error message itself:
+            String pathname = String.valueOf(location.getPath());
+            return new File(pathname).exists() ? "" : " (" + location + ")";
+        }
+
         @NotNull
         private static BuildMessage.Kind kind(@NotNull CompilerMessageSeverity severity) {
             switch (severity) {