Extensions Docs Server: Internal file system

chrome/common/extensions/docs/server2/template_data_source.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 logging
 from path_utils import FormatKey
 from third_party.handlebar import Handlebar
 
 EXTENSIONS_URL = '/chrome/extensions'
 
 class TemplateDataSource(object):
   """This class fetches and compiles templates using the fetcher passed in with
   |cache_builder|.
   """
   def __init__(self,
                branch,
                api_data_source,
                intro_data_source,
                samples_data_source,
                cache_builder,
                base_paths):
     self._branch_info = self._MakeBranchDict(branch)
     self._static_resources = ((('/' + branch) if branch != 'local' else '') +
                               '/static')
     self._api_data_source = api_data_source
     self._intro_data_source = intro_data_source
     self._samples_data_source = samples_data_source
     self._cache = cache_builder.build(self._LoadTemplate)
     self._base_paths = base_paths
+    self._use = 0
 
   def _MakeBranchDict(self, branch):
     return {
       'showWarning': branch != 'stable',
       'branches': [
         { 'name': 'Stable', 'path': EXTENSIONS_URL + '/stable' },
         { 'name': 'Dev', 'path': EXTENSIONS_URL + '/dev' },
         { 'name': 'Beta', 'path': EXTENSIONS_URL + '/beta' },
         { 'name': 'Trunk', 'path': EXTENSIONS_URL + '/trunk' }
       ],
       'current': branch
     }
 
   def _LoadTemplate(self, template):
     return Handlebar(template)
 
   def Render(self, template_name):
     """This method will render a template named |template_name|, fetching all
     the partial templates needed from |self._cache|. Partials are retrieved
     from the TemplateDataSource with the |get| method.
     """
+    self._use = 0
     template = self.get(template_name)
     if not template:
       return ''
       # TODO error handling
+    self._use = 1
     return template.render({
       'apis': self._api_data_source,
       'branchInfo': self._branch_info,
       'intros': self._intro_data_source,
       'partials': self,
       'samples': self._samples_data_source,
       'static': self._static_resources
     }).text
 
   def __getitem__(self, key):
     return self.get(key)
 
   def get(self, key):
     real_path = FormatKey(key)
-    for base_path in self._base_paths:
-      try:
-        return self._cache.getFromFile(base_path + '/' + real_path)
-      except:
-        pass
-    return None
+    try:
+      return self._cache.getFromFile(
+          self._base_paths[self._use] + '/' + real_path)
+    except Exception as e:
+      logging.warn(e)
+      return None