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# Copyright (C) 2009 Canonical
#
# Authors:
# Michael Vogt
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; version 3.
#
# This program 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 General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
import logging
import subprocess
from gettext import gettext as _
class UnimplementedError(Exception):
pass
class Distro(object):
""" abstract base class for a distribution """
# missing thumbnail
IMAGE_THUMBNAIL_MISSING = "/usr/share/software-center/images/dummy-thumbnail-ubuntu.png"
IMAGE_FULL_MISSING = "/usr/share/software-center/images/dummy-screenshot-ubuntu.png"
def get_app_name(self):
"""
The name of the application (as displayed in the main window and
the about window)
"""
return _("Software Center")
def get_app_description(self):
"""
The description of the application displayed in the about dialog
"""
return _("Lets you choose from thousands of free applications available for your system.")
def get_distro_channel_name(self):
""" The name of the main channel in the Release file (e.g. Ubuntu)"""
return "none"
def get_distro_channel_description(self):
""" The description for the main distro channel """
return "none"
def get_codename(self):
""" The codename of the distro, e.g. lucid """
if not hasattr(self, "_distro_code_name"):
self._distro_code_name = subprocess.Popen(
["lsb_release","-c","-s"],
stdout=subprocess.PIPE).communicate()[0].strip()
return self._distro_code_name
def get_installation_status(self, pkg):
raise UnimplementedError
def get_maintenance_status(self, cache, appname, pkgname, component, channel):
raise UnimplementedError
def get_price(self, doc):
""" get the price for the given software
:param doc: The xapian document that contains the information
:return: None if the price should not be displayed, a string otherwise
"""
return None
def get_license_text(self, component):
raise UnimplementedError
def is_supported(self, cache, doc, pkgname):
"""
return True if the given document and pkgname is supported by
the distribution
"""
raise UnimplementError
def _get_distro():
distro_id = subprocess.Popen(["lsb_release","-i","-s"],
stdout=subprocess.PIPE).communicate()[0].strip()
logging.debug("get_distro: '%s'" % distro_id)
# start with a import, this gives us only a softwarecenter module
module = __import__(distro_id, globals(), locals(), [], -1)
# get the right class and instanciate it
distro_class = getattr(module, distro_id)
instance = distro_class()
return instance
def get_distro():
""" factory to return the right Distro object """
return distro_instance
# singelton
distro_instance=_get_distro()
if __name__ == "__main__":
print get_distro()
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