external build: report problematic file when JPS model cannot be loaded (IDEA-96471, ZD-48285)

jps/jps-builders/src/org/jetbrains/jps/cmdline/BuildSession.java

@@ -39,6 +39,7 @@ import org.jetbrains.jps.incremental.fs.BuildFSState;
 import org.jetbrains.jps.incremental.messages.*;
 import org.jetbrains.jps.incremental.storage.Timestamps;
 import org.jetbrains.jps.model.module.JpsModule;
+import org.jetbrains.jps.model.serialization.CannotLoadJpsModelException;
 import org.jetbrains.jps.service.SharedThreadPool;
 
 import java.io.*;
@@ -565,7 +566,13 @@ final class BuildSession implements Runnable, CanceledStatus {
   private void finishBuild(Throwable error, boolean hadBuildErrors, boolean doneSomething) {
     CmdlineRemoteProto.Message lastMessage = null;
     try {
-      if (error != null) {
+      if (error instanceof CannotLoadJpsModelException) {
+        String text = "Failed to load project configuration: " + StringUtil.decapitalize(error.getMessage());
+        String path = ((CannotLoadJpsModelException)error).getFile().getAbsolutePath();
+        lastMessage = CmdlineProtoUtil.toMessage(mySessionId, CmdlineProtoUtil.createCompileMessage(BuildMessage.Kind.ERROR, text, path,
+                                                                                                    -1, -1, -1, -1, -1, -1.0f));
+      }
+      else if (error != null) {
         Throwable cause = error.getCause();
         if (cause == null) {
           cause = error;

jps/model-serialization/src/org/jetbrains/jps/model/serialization/CannotLoadJpsModelException.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2000-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jetbrains.jps.model.serialization;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.io.File;
+
+/**
+ * @author nik
+ */
+public class CannotLoadJpsModelException extends RuntimeException {
+  @NotNull private final File myFile;
+
+  public CannotLoadJpsModelException(@NotNull File file, @NotNull String message, @Nullable Throwable cause) {
+    super(message, cause);
+    myFile = file;
+  }
+
+  @NotNull
+  public File getFile() {
+    return myFile;
+  }
+}

jps/model-serialization/src/org/jetbrains/jps/model/serialization/JpsLoaderBase.java

@@ -74,10 +74,10 @@ public abstract class JpsLoaderBase {
       return element;
     }
     catch (JDOMException e) {
-      throw new RuntimeException("Cannot parse xml file " + file.getAbsolutePath() + ": " + e.getMessage(), e);
+      throw new CannotLoadJpsModelException(file, "Cannot parse xml file " + file.getAbsolutePath() + ": " + e.getMessage(), e);
     }
     catch (IOException e) {
-      throw new RuntimeException("Cannot read file " + file.getAbsolutePath() + ": " + e.getMessage(), e);
+      throw new CannotLoadJpsModelException(file, "Cannot read file " + file.getAbsolutePath() + ": " + e.getMessage(), e);
     }
   }