| # portage_compat_namespace.py -- provide compability layer with new namespace |
| # Copyright 2007 Gentoo Foundation |
| # Distributed under the terms of the GNU General Public License v2 |
| # $Id$ |
| |
| """ |
| This module checks the name under which it is imported and attempts to load |
| the corresponding module of the new portage namespace, inserting it into the |
| loaded modules list. |
| It also issues a warning to the caller to migrate to the new namespace. |
| Note that this module should never be used with it's true name, but only by |
| links pointing to it. Also it is limited to portage_foo -> portage.foo |
| translations, however existing subpackages shouldn't use it anyway to maintain |
| compability with 3rd party modules (like elog or cache plugins), and they |
| shouldn't be directly imported by external consumers. |
| |
| This module is based on an idea by Brian Harring. |
| """ |
| |
| import sys, warnings |
| |
| __oldname = __name__ |
| if __name__.startswith("portage_"): |
| __newname = __name__.replace("_", ".") |
| else: |
| __newname = "portage."+__name__ |
| |
| try: |
| __package = __import__(__newname, globals(), locals()) |
| __realmodule = getattr(__package, __newname[8:]) |
| except (ImportError, AttributeError): |
| raise ImportError("No module named %s" % __oldname) |
| |
| def _showwarning(message, category, filename, lineno, file=None, line=None): |
| if file is None: |
| import sys |
| file = sys.stderr |
| try: |
| file.write("%s:%s: %s: %s\n" % (filename, lineno, category.__name__, message)) |
| except IOError: |
| pass |
| |
| warnings.showwarning = _showwarning |
| |
| warnings.warn("DEPRECATION NOTICE: The %s module was replaced by %s" % (__oldname, __newname), DeprecationWarning) |
| sys.modules[__oldname] = __realmodule |
