Extensions Docs Server: Efficient MemcacheFileSystem

chrome/common/extensions/docs/server2/local_file_system.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 
 import file_system
 from future import Future
 
 class LocalFileSystem(file_system.FileSystem):
@@ skipping 27 matching lines @@
 
   def Read(self, paths, binary=False):
     result = {}
     for path in paths:
       if path.endswith('/'):
         result[path] = self._ListDir(self._ConvertToFilepath(path))
       else:
         result[path] = self._ReadFile(self._ConvertToFilepath(path), binary)
     return Future(value=result)
 
+  def _CreateStatInfo(self, path):
+    versions = [(filename, os.stat(os.path.join(path, filename)).st_mtime)
+                for filename in os.listdir(path)]

[not at google - send to devlin, 2012/08/10 06:42:24]

can construct the dict without an intermediate list:

versions = dict((filename, os.stat(...))
                for filename in os.listdir(path))

[cduvall, 2012/08/11 00:15:23]

Done.

+    return self.StatInfo(os.stat(path).st_mtime, dict(versions))
+
   def Stat(self, path):
-    return self.StatInfo(os.stat(os.path.join(self._base_path, path)).st_mtime)
+    if '/' in path:
+      par_dir = path.rsplit('/', 1)[0] + '/'
+    else:
+      par_dir = '.'
+    return self._CreateStatInfo(os.path.join(self._base_path, par_dir))