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# Copyright (C) 2010 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
from softwarecenter.utils import UnimplementedError
class InstallBackend(object):
def __init__(self):
self.pending_transactions = {}
self.pending_purchases = []
def upgrade(self, pkgname, appname, iconname, addons_install=[], addons_remove=[], metadata=None):
pass
def remove(self, pkgname, appname, iconname, addons_install=[], addons_remove=[], metadata=None):
pass
def remove_multiple(self, pkgnames, appnames, iconnames, addons_install=[], addons_remove=[], metadatas=None):
pass
def install(self, pkgname, appname, iconname, filename=None, addons_install=[], addons_remove=[], metadata=None):
pass
def install_multiple(self, pkgnames, appnames, iconnames, addons_install=[], addons_remove=[], metadatas=None):
pass
def apply_changes(self, pkgname, appname, iconname, addons_install=[], addons_remove=[], metadata=None):
pass
def reload(self, sources_list=None, metadata=None):
""" reload package list """
pass
class InstallBackendUI(object):
def ask_config_file_conflict(self, old, new):
""" show a conffile conflict and ask what to do
Return "keep" to keep the old one
"replace" to replace the old with the new one
"""
raise UnimplementedError("need custom ask_config_file_conflict method")
def ask_medium_required(self, medium, drive):
""" ask the user to provide a medium in drive
return True if medium is provided, False to cancel
"""
raise UnimplementedError("need custom ask_medium_required method")
def error(self, parent, primary, secondary, details=None, alternative_action=None):
""" show an error dialog """
raise UnimplementedError("need custom error method")
# singleton
install_backend = None
def get_install_backend():
global install_backend
if install_backend is None:
from softwarecenter.enums import USE_PACKAGEKIT_BACKEND
if not USE_PACKAGEKIT_BACKEND:
from softwarecenter.backend.installbackend_impl.aptd import AptdaemonBackend
install_backend = AptdaemonBackend()
else:
from softwarecenter.backend.installbackend_impl.packagekitd import PackagekitBackend
install_backend = PackagekitBackend()
return install_backend
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