setup.py 文件源码

def add_project_to_sys_path(self):
        from pkg_resources import normalize_path, add_activation_listener
        from pkg_resources import working_set, require

        self.reinitialize_command('egg_info')
        self.run_command('egg_info')
        self.reinitialize_command('build_ext', inplace=1)
        self.run_command('build_ext')


        # Check if this distribution is already on sys.path
        # and remove that version, this ensures that the right
        # copy of the package gets tested.

        self.__old_path = sys.path[:]
        self.__old_modules = sys.modules.copy()


        ei_cmd = self.get_finalized_command('egg_info')
        sys.path.insert(0, normalize_path(ei_cmd.egg_base))
        sys.path.insert(1, os.path.dirname(__file__))

        # Strip the namespace packages defined in this distribution
        # from sys.modules, needed to reset the search path for
        # those modules.

        nspkgs = getattr(self.distribution, 'namespace_packages')
        if nspkgs is not None:
            for nm in nspkgs:
                del sys.modules[nm]

        # Reset pkg_resources state:
        add_activation_listener(lambda dist: dist.activate())
        working_set.__init__()
        require('%s==%s'%(ei_cmd.egg_name, ei_cmd.egg_version))