Issue 20240. Use a FileManager that manages its own temporary directory.

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 'dart:io' as io;
-
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/channel.dart';
 import 'package:analysis_server/src/domain_analysis.dart';
 import 'package:analysis_server/src/domain_completion.dart';
 import 'package:analysis_server/src/edit/edit_domain.dart';
 import 'package:analysis_server/src/search/search_domain.dart';
 import 'package:analysis_server/src/domain_server.dart';
 import 'package:analysis_server/src/package_map_provider.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/src/generated/sdk_io.dart';
-import 'package:path/path.dart' as pathos;
 import 'package:analysis_services/index/index.dart';
 import 'package:analysis_services/index/local_file_index.dart';
 
 
 /**
  * Creates and runs an [Index].
  */
 Index _createIndex() {
-  String tempPath = io.Directory.systemTemp.path;
-  String indexPath = pathos.join(tempPath, 'AnalysisServer_index');
-  io.Directory indexDirectory = new io.Directory(indexPath);
-  if (indexDirectory.existsSync()) {
-    indexDirectory.deleteSync(recursive: true);
-  }
-  if (!indexDirectory.existsSync()) {
-    indexDirectory.createSync();
-  }
-  Index index = createLocalFileIndex(indexDirectory);
+  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.
@@ skipping 39 matching lines @@
   void _initializeHandlers(AnalysisServer server) {
     server.handlers = [
         new ServerDomainHandler(server),
         new AnalysisDomainHandler(server),
         new EditDomainHandler(server),
         new SearchDomainHandler(server),
         new CompletionDomainHandler(server),
     ];
   }
 }