Disable analysis in hidden directories (fix for issue 22170)

pkg/analysis_server/lib/src/context_manager.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 context.directory.manager;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 265 matching lines @@
         }
         _addPreviouslyExcludedSources(info, changeSet, child, oldExcludedPaths);
       }
     }
   }
 
   /**
    * Resursively adds all Dart and HTML files to the [changeSet].
    */
   void _addSourceFiles(ChangeSet changeSet, Folder folder, _ContextInfo info) {
-    if (info.excludesResource(folder)) {
+    if (info.excludesResource(folder) || folder.shortName.startsWith('.')) {
       return;
     }
     List<Resource> children = folder.getChildren();
     for (Resource child in children) {
       String path = child.path;
       // ignore excluded files or folders
       if (_isExcluded(path)) {
         continue;
       }
       // add files, recurse into folders
@@ skipping 358 matching lines @@
   /**
    * Returns `true` if [path] is excluded, as it is in one of the children.
    */
   bool excludes(String path) {
     return children.any((child) {
       return child.folder.contains(path);
     });
   }
 
   /**
-   * Returns `true` if [resource] is excldued, as it is in one of the children.
+   * Returns `true` if [resource] is excluded, as it is in one of the children.
    */
   bool excludesResource(Resource resource) {
     return excludes(resource.path);
   }
 
   /**
    * Returns `true` if [path] is the pubspec file of this context.
    */
   bool isPubspec(String path) {
     return path == pubspecPath;
   }
 }