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#!/usr/bin/python
import dbus
from dbus.mainloop.glib import DBusGMainLoop
DBusGMainLoop(set_as_default=True)
import logging
import sys
import xapian
from gi.repository import GObject
from softwarecenter.db.database import StoreDatabase
from softwarecenter.backend import get_install_backend
import softwarecenter.paths
LOG = logging.getLogger("update-software-center-channels")
def compare_channels_in_db_to_cache(db):
# the operation get_origins can take some time (~60s?)
cache_origins = set(db._aptcache.get_all_origins())
db_origins = set(db.get_origins_from_db())
# origins
LOG.debug("cache_origins: %s" % cache_origins)
LOG.debug("db_origins: %s" % db_origins)
# the db_origins will contain origins from the s-c-agent, so
# we don't need to rebuild if the db has more origins then
# the cache, but we need to rebuild if the cache has origins
# that a-x-i does not have
if not cache_origins.issubset(db_origins):
return True
return False
def trigger_axi_update_and_wait():
def _axi_finished(res):
main.quit()
context = GObject.main_context_default()
main = GObject.MainLoop(context)
system_bus = dbus.SystemBus()
try:
axi = dbus.Interface(
system_bus.get_object("org.debian.AptXapianIndex","/"),
"org.debian.AptXapianIndex")
axi.connect_to_signal("UpdateFinished", _axi_finished)
# first arg is force, second update_only
axi.update_async(True, False)
main.run()
except Exception as e:
print e
LOG.warning("could not update axi")
def check_for_channel_updates_and_trigger_axi():
db = StoreDatabase()
db._aptcache.open()
db.open()
if compare_channels_in_db_to_cache(db):
trigger_axi_update_and_wait()
return True
return False
if __name__ == "__main__":
# poor mans argparse
if "--debug" in sys.argv:
logging.basicConfig(level=logging.DEBUG)
# do it
try:
res = check_for_channel_updates_and_trigger_axi()
# return "1" means xapian got updated
if res:
sys.exit(1)
except xapian.DatabaseOpeningError as e:
# this can happen if there is no a-x-i DB yet and we can ignore it
LOG.info("failed to open xapian db: '%s'" % e)
# return "0" nothing was done
sys.exit(0)
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