Return RequestErrorCode.NO_INDEX_GENERATED for search/refactoring requests.

pkg/analysis_server/lib/src/socket_server.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library socket.server;
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/channel/channel.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/local_file_index.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
 import 'package:analyzer/source/pub_package_map_provider.dart';
 import 'package:analyzer/src/generated/sdk_io.dart';
 
 
 /**
- * Creates and runs an [Index].
- */
-Index _createIndex() {
-  Index index = createLocalFileIndex();
-  index.run();
-  return index;
-}
-
-
-/**
  * Instances of the class [SocketServer] implement the common parts of
  * http-based and stdio-based analysis servers.  The primary responsibility of
  * the SocketServer is to manage the lifetime of the AnalysisServer and to
  * encode and decode the JSON messages exchanged with the client.
  */
 class SocketServer {
   final AnalysisServerOptions analysisServerOptions;
   final DirectoryBasedDartSdk defaultSdk;
   final InstrumentationService instrumentationService;
   final ServerPlugin serverPlugin;
@@ skipping 15 matching lines @@
     if (analysisServer != null) {
       RequestError error = new RequestError(
           RequestErrorCode.SERVER_ALREADY_STARTED,
           "Server already started");
       serverChannel.sendResponse(new Response('', error: error));
       serverChannel.listen((Request request) {
         serverChannel.sendResponse(new Response(request.id, error: error));
       });
       return;
     }
+
     PhysicalResourceProvider resourceProvider;
     if (analysisServerOptions.fileReadMode == 'as-is') {
       resourceProvider = PhysicalResourceProvider.INSTANCE;
     } else if (analysisServerOptions.fileReadMode == 'normalize-eol-always') {
       resourceProvider =
           new PhysicalResourceProvider(PhysicalResourceProvider.NORMALIZE_EOL_ALWAYS);
     } else {
       throw new Exception(
           'File read mode was set to the unknown mode: $analysisServerOptions.fileReadMode');
     }
 
+    Index index = null;
+    if (!analysisServerOptions.noIndex) {
+      index = createLocalFileIndex();
+      index.run();
+    }
+
     analysisServer = new AnalysisServer(
         serverChannel,
         resourceProvider,
         new PubPackageMapProvider(resourceProvider, defaultSdk),
-        _createIndex(),
+        index,
         analysisServerOptions,
         defaultSdk,
         instrumentationService,
         rethrowExceptions: false);
     _initializeHandlers(analysisServer);
   }
 
   /**
    * Initialize the handlers to be used by the given [server].
    */
   void _initializeHandlers(AnalysisServer server) {
     server.handlers = serverPlugin.createDomains(server);
   }
 }