external build: support 'show compiler log' option for GWT compiler

java/compiler/impl/src/com/intellij/compiler/impl/CompileDriver.java

@@ -29,6 +29,7 @@ import com.intellij.compiler.make.ChangedConstantsDependencyProcessor;
 import com.intellij.compiler.make.DependencyCache;
 import com.intellij.compiler.progress.CompilerTask;
 import com.intellij.compiler.server.BuildManager;
+import com.intellij.compiler.server.CustomBuilderMessageHandler;
 import com.intellij.compiler.server.DefaultMessageHandler;
 import com.intellij.diagnostic.IdeErrorsDialog;
 import com.intellij.diagnostic.PluginException;
@@ -512,7 +513,7 @@ public class CompileDriver {
             ExitStatus status = ExitStatus.SUCCESS;
             if (event.hasCompletionStatus()) {
               final CmdlineRemoteProto.Message.BuilderMessage.BuildEvent.Status completionStatus = event.getCompletionStatus();
-              switch(completionStatus) {
+              switch (completionStatus) {
                 case CANCELED:
                   status = ExitStatus.CANCELLED;
                   break;
@@ -529,6 +530,13 @@ public class CompileDriver {
             }
             compileContext.putUserDataIfAbsent(COMPILE_SERVER_BUILD_STATUS, status);
             break;
+          case CUSTOM_BUILDER_MESSAGE:
+            if (event.hasCustomBuilderMessage()) {
+              CmdlineRemoteProto.Message.BuilderMessage.BuildEvent.CustomBuilderMessage message = event.getCustomBuilderMessage();
+              messageBus.syncPublisher(CustomBuilderMessageHandler.TOPIC).messageReceived(message.getBuilderId(), message.getMessageType(),
+                                                                                          message.getMessageText());
+            }
+            break;
         }
       }
     });

java/compiler/impl/src/com/intellij/compiler/server/CustomBuilderMessageHandler.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2000-2012 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 com.intellij.compiler.server;
+
+import com.intellij.util.messages.Topic;
+
+import java.util.EventListener;
+
+/**
+ * @author nik
+ */
+public interface CustomBuilderMessageHandler extends EventListener {
+  Topic<CustomBuilderMessageHandler> TOPIC = Topic.create("custom builder message", CustomBuilderMessageHandler.class);
+
+  void messageReceived(String builderId, String messageType, String messageText);
+}