Support for excluded files/folders.

pkg/analyzer/lib/file_system/memory_file_system.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 memory_file_system;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/engine.dart' show TimestampedData;
@@ skipping 97 matching lines @@
       if (parentPath != path) {
         newFolder(parentPath);
       }
       _MemoryFolder folder = new _MemoryFolder(this, path);
       _pathToResource[path] = folder;
       _pathToTimestamp[path] = nextStamp++;
       return folder;
     } else if (resource is _MemoryFolder) {
       return resource;
     } else {
-      String message = 'Folder expected at '
-                       "'$path'"
-                       'but ${resource.runtimeType} found';
+      String message =
+          'Folder expected at ' "'$path'" 'but ${resource.runtimeType} found';
       throw new ArgumentError(message);
     }
   }
 
   void _checkFileAtPath(String path) {
     _MemoryResource resource = _pathToResource[path];
     if (resource is! _MemoryFile) {
       throw new ArgumentError(
           'File expected at "$path" but ${resource.runtimeType} found');
     }
   }
 
   void _notifyWatchers(String path, ChangeType changeType) {
-    _pathToWatchers.forEach((String watcherPath, List<StreamController<WatchEvent>> streamControllers) {
+    _pathToWatchers.forEach(
+        (String watcherPath, List<StreamController<WatchEvent>> streamControllers) {
       if (posix.isWithin(watcherPath, path)) {
-        for (StreamController<WatchEvent> streamController in streamControllers) {
+        for (StreamController<WatchEvent> streamController in streamControllers)
+            {
           streamController.add(new WatchEvent(changeType, path));
         }
       }
     });
   }
 }
 
 
 /**
  * An in-memory implementation of [File] which acts like a symbolic link to a
  * non-existent file.
  */
 class _MemoryDummyLink extends _MemoryResource implements File {
-  _MemoryDummyLink(MemoryResourceProvider provider, String path) :
-      super(provider, path);
+  _MemoryDummyLink(MemoryResourceProvider provider, String path) : super(
+      provider,
+      path);
 
   @override
   bool get exists => false;
 
   String get _content {
     throw new MemoryResourceException(path, "File '$path' could not be read");
   }
 
   int get _timestamp => _provider._pathToTimestamp[path];
 
   @override
   Source createSource([Uri uri]) {
     throw new MemoryResourceException(path, "File '$path' could not be read");
   }
+
+  @override
+  bool isOrContains(String path) {
+    return path == this.path;
+  }
 }
 
 
 /**
  * An in-memory implementation of [File].
  */
 class _MemoryFile extends _MemoryResource implements File {
-  _MemoryFile(MemoryResourceProvider provider, String path) :
-      super(provider, path);
+  _MemoryFile(MemoryResourceProvider provider, String path) : super(
+      provider,
+      path);
 
   String get _content {
     String content = _provider._pathToContent[path];
     if (content == null) {
       throw new MemoryResourceException(path, "File '$path' does not exist");
     }
     return content;
   }
 
   int get _timestamp => _provider._pathToTimestamp[path];
 
   @override
   Source createSource([Uri uri]) {
     if (uri == null) {
       uri = posix.toUri(path);
     }
     return new _MemoryFileSource(this, uri);
   }
+
+  @override
+  bool isOrContains(String path) {
+    return path == this.path;
+  }
 }
 
 
 /**
  * An in-memory implementation of [Source].
  */
 class _MemoryFileSource implements Source {
   final _MemoryFile _file;
 
   final Uri uri;
@@ skipping 56 matching lines @@
 
   @override
   String toString() => _file.toString();
 }
 
 
 /**
  * An in-memory implementation of [Folder].
  */
 class _MemoryFolder extends _MemoryResource implements Folder {
-  _MemoryFolder(MemoryResourceProvider provider, String path) :
-      super(provider, path);
+  _MemoryFolder(MemoryResourceProvider provider, String path) : super(
+      provider,
+      path);
   @override
   Stream<WatchEvent> get changes {
-    StreamController<WatchEvent> streamController = new StreamController<WatchEvent>();
+    StreamController<WatchEvent> streamController =
+        new StreamController<WatchEvent>();
     if (!_provider._pathToWatchers.containsKey(path)) {
       _provider._pathToWatchers[path] = <StreamController<WatchEvent>>[];
     }
     _provider._pathToWatchers[path].add(streamController);
     streamController.done.then((_) {
       _provider._pathToWatchers[path].remove(streamController);
       if (_provider._pathToWatchers[path].isEmpty) {
         _provider._pathToWatchers.remove(path);
       }
     });
@@ skipping 26 matching lines @@
   @override
   List<Resource> getChildren() {
     List<Resource> children = <Resource>[];
     _provider._pathToResource.forEach((resourcePath, resource) {
       if (posix.dirname(resourcePath) == path) {
         children.add(resource);
       }
     });
     return children;
   }
+
+  @override
+  bool isOrContains(String path) {
+    if (path == this.path) {
+      return true;
+    }
+    return contains(path);
+  }
 }
 
 
 /**
  * An in-memory implementation of [Resource].
  */
 abstract class _MemoryResource implements Resource {
   final MemoryResourceProvider _provider;
   final String path;
 
@@ skipping 21 matching lines @@
   bool operator ==(other) {
     if (runtimeType != other.runtimeType) {
       return false;
     }
     return path == other.path;
   }
 
   @override
   String toString() => path;
 }