Allow Directory.create to create all missing path components.

utils/pub/io.dart

 // Copyright (c) 2012, 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.
 
 /**
  * Helper functionality to make working with IO easier.
  */
 library io;
 
 import 'dart:io';
@@ skipping 204 matching lines @@
   dir = _getDirectory(dir);
   return dir.createTemp();
 }
 
 /**
  * Asynchronously recursively deletes [dir], which can be a [String] or a
  * [Directory]. Returns a [Future] that completes when the deletion is done.
  */
 Future<Directory> deleteDir(dir) {
   dir = _getDirectory(dir);
-  return dir.deleteRecursively();
+  return dir.delete(recursive: true);
 }
 
 /**
  * Asynchronously lists the contents of [dir], which can be a [String] directory
  * path or a [Directory]. If [recursive] is `true`, lists subdirectory contents
  * (defaults to `false`). If [includeSpecialFiles] is `true`, includes
  * hidden `.DS_Store` files (defaults to `false`, other hidden files may be
  * omitted later).
  */
 Future<List<String>> listDir(dir,
@@ skipping 525 matching lines @@
   return new Directory(entry);
 }
 
 /**
  * Gets a [Uri] for [uri], which can either already be one, or be a [String].
  */
 Uri _getUri(uri) {
   if (uri is Uri) return uri;
   return new Uri.fromString(uri);
 }