Have analysis.getLibraryDependencies wait for the server.onAnalysisComplete completer

pkg/analysis_server/lib/src/domain_analysis.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 domain.analysis;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/computer/computer_hover.dart';
@@ skipping 72 matching lines @@
       if (hoverInformation != null) {
         hovers.add(hoverInformation);
       }
     }
     // send response
     return new AnalysisGetHoverResult(hovers).toResponse(request.id);
   }
 
   /// Implement the `analysis.getLibraryDependencies` request.
   Response getLibraryDependencies(Request request) {
-    LibraryDependencyCollector collector = new LibraryDependencyCollector(
-            server.getAnalysisContexts());
-    Set<String> libraries = collector.collectLibraryDependencies();
-    Map<String, Map<String, List<String>>> packageMap = collector.calculatePackageMap(server.folderMap);
-    return new AnalysisGetLibraryDependenciesResult(
-        libraries.toList(growable: false), packageMap).toResponse(request.id);
+    server.onAnalysisComplete.then((_) {
+      LibraryDependencyCollector collector =
+          new LibraryDependencyCollector(server.getAnalysisContexts());
+      Set<String> libraries = collector.collectLibraryDependencies();
+      Map<String, Map<String, List<String>>> packageMap =
+          collector.calculatePackageMap(server.folderMap);
+      server.sendResponse(new AnalysisGetLibraryDependenciesResult(
+          libraries.toList(growable: false),
+          packageMap).toResponse(request.id));
+    });
+    // delay response
+    return Response.DELAYED_RESPONSE;
   }
 
   @override
   Response handleRequest(Request request) {
     try {
       String requestName = request.method;
       if (requestName == ANALYSIS_GET_ERRORS) {
         return getErrors(request);
       } else if (requestName == ANALYSIS_GET_HOVER) {
         return getHover(request);
@@ skipping 86 matching lines @@
     }
     if (newOptions.generateHints != null) {
       updaters.add((engine.AnalysisOptionsImpl options) {
         options.hint = newOptions.generateHints;
       });
     }
     server.updateOptions(updaters);
     return new AnalysisUpdateOptionsResult().toResponse(request.id);
   }
 }