# -*- Mode: Python; py-indent-offset: 4 -*-
#
# Copyright (C) 2005,2007 Johan Dahlin <johan@gnome.org>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#

import os
import sys

from .repository import repository

class DynamicImporter(object):
    def __init__(self, name, path):
        self.name = name
        self.path = path

    @staticmethod
    def find_module(name, path=None):
        if name == 'cairo':
            return None
        namespace = repository.require(name)
        if namespace:
            return DynamicImporter(name, path)

    def load_module(self, name):
        from .module import DynamicModule
        module_name = 'girepository.overrides.%s' % (name,)
        try:
            module = __import__(module_name)
            modtype = getattr(module, name + 'Module')
        except ImportError, e:
            modtype = DynamicModule
        return modtype(name, self.path)


def install_importhook():
    sys.meta_path.append(DynamicImporter)