| # Copyright 2015 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """Fake out system python modules that are not available on AE. |
| |
| Chromite imports some standard python modules that are not available on the |
| restricted sandbox environment on appengine. Fake out this modules such that |
| imports don't break, but any attempt to use the modules blows up obviously. |
| """ |
| |
| from __future__ import print_function |
| |
| import os |
| |
| |
| FAKE_HOMEDIR = '/tmp/an_obviously_non_existent_home_dir' |
| def _expanduser(_): |
| """A fake implementation of os.path.expanduser. |
| |
| os.path.expanduser needs to import 'pwd' that is not available on appengine. |
| In fact, the concept of HOMEDIR doesn't make sense at all. So, patch it to |
| return a safe fake path. If we try to use it anywhere, it will fail obviously. |
| """ |
| return FAKE_HOMEDIR |
| |
| |
| # Importing this module has the side effect of patching all of the following |
| # library modules / classes / functions. |
| os.path.expanduser = _expanduser |
