Current File : //lib/python3/dist-packages/UpdateManager/backend/__init__.py
#!/usr/bin/env python
# -*- Mode: Python; indent-tabs-mode: nil; tab-width: 4; coding: utf-8 -*-
"""Integration of package managers into UpdateManager"""
# (c) 2005-2009 Canonical, GPL
from __future__ import absolute_import
import gi
gi.require_version("Gtk", "3.0")
gi.require_version('Snapd', '1')
from gi.repository import GLib, Gtk, Snapd
from apt import Cache
import json
import logging
import os
import re
import subprocess
from gettext import gettext as _
from threading import Thread
from UpdateManager.Core.MyCache import MyCache
from UpdateManager.Core.utils import inhibit_sleep, get_dist_version
from UpdateManager.Dialogs import Dialog
class InstallBackend(Dialog):
ACTION_UPDATE = 0
ACTION_PRE_INSTALL = 1
ACTION_INSTALL = 2
def __init__(self, window_main, action):
Dialog.__init__(self, window_main)
self.action = action
self.sleep_cookie = None
def start(self):
os.environ["APT_LISTCHANGES_FRONTEND"] = "none"
# Do not suspend during the update process
self.sleep_cookie = inhibit_sleep()
if self.action == self.ACTION_PRE_INSTALL:
unfresh_cache = self.window_main.cache
fresh_cache = Cache(rootdir=self.window_main.cache.rootdir)
# Install OEM packages, update, then do ACTION_INSTALL
pkgs_install_oem = []
pkgs_upgrade_oem = []
for pkg in self.window_main.oem_metapackages:
unfresh_pkg = unfresh_cache[pkg]
fresh_pkg = fresh_cache[pkg]
if (unfresh_pkg.marked_install
and not fresh_pkg.is_installed):
pkgs_install_oem.append(pkg)
elif (unfresh_pkg.marked_upgrade
and fresh_pkg.is_upgradable):
pkgs_upgrade_oem.append(pkg)
self.commit_oem(pkgs_install_oem, pkgs_upgrade_oem)
elif self.action == self.ACTION_INSTALL:
# Get the packages which should be installed and update
pkgs_install = []
pkgs_upgrade = []
pkgs_remove = []
# Get a fresh cache in case update-manager's is outdated to
# skip operations that already took place
fresh_cache = Cache(rootdir=self.window_main.cache.rootdir)
for pkg in self.window_main.cache:
try:
if pkg.marked_install \
and not fresh_cache[pkg.name].is_installed:
pkgname = pkg.name
if pkg.is_auto_installed:
pkgname += "#auto"
pkgs_install.append(pkgname)
elif (pkg.marked_upgrade
and fresh_cache[pkg.name].is_upgradable):
pkgs_upgrade.append(pkg.name)
elif (pkg.marked_delete
and fresh_cache[pkg.name].is_installed):
pkgs_remove.append(pkg.name)
except KeyError:
# pkg missing from fresh_cache can't be modified
pass
self.commit(pkgs_install, pkgs_upgrade, pkgs_remove)
else:
self.update()
def update(self):
"""Run a update to refresh the package list"""
raise NotImplementedError
def commit_oem(self, pkgs_install_oem, pkgs_upgrade_oem):
""" Install these OEM packages """
self._action_done(self.ACTION_PRE_INSTALL,
authorized=True, success=True,
error_string=None, error_desc=None,
trans_failed=None)
def commit(self, pkgs_install, pkgs_upgrade, pkgs_remove):
"""Commit the cache changes """
raise NotImplementedError
def get_snap_seeds(self):
seeded_snaps = {}
unseeded_snaps = {}
curr_channel = "stable/ubuntu-" + get_dist_version()
cache = self.window_main.cache
try:
d2s_file = open(
'/usr/share/ubuntu-release-upgrader/deb2snap.json', 'r')
d2s = json.load(d2s_file)
d2s_file.close()
for snap in d2s["seeded"]:
seed = d2s["seeded"][snap]
deb = seed.get("deb", None)
to_channel = seed.get("to_channel", curr_channel)
metapkg = seed.get("metapkg", None)
if metapkg not in cache:
continue
if metapkg and cache[metapkg].is_installed is False:
continue
seeded_snaps[snap] = (deb, to_channel)
for snap in d2s["unseeded"]:
unseed = d2s["unseeded"][snap]
from_channel = unseed.get("from_channel", curr_channel)
metapkg = seed.get("metapkg", None)
if metapkg not in cache:
continue
if metapkg and cache[metapkg].is_installed is False:
continue
unseeded_snaps[snap] = (from_channel)
except Exception as e:
logging.debug("error reading deb2snap.json file (%s)" % e)
return seeded_snaps, unseeded_snaps
def get_deb2snap_dups(self):
# update and grab the latest cache
try:
if self.window_main.cache is None:
self.window_main.cache = MyCache(None)
else:
self.window_main.cache.open(None)
self.window_main.cache._initDepCache()
cache = self.window_main.cache
except Exception as e:
# just return an empty array for now, it's perfectly safe to
# postpone this duplicates check to a later update.
logging.debug("error reading cache (%s)" % e)
return []
duplicates = []
seeded_snaps, _ = self.get_snap_seeds()
for snap, (deb, _) in seeded_snaps.items():
# if the deb is installed and was not manually installed,
# replace it
if (deb in cache and cache[deb].is_installed):
deb_is_auto = True
cache[deb].mark_delete()
for pkg in cache.get_changes():
if (pkg.is_installed and pkg.marked_delete
and not pkg.is_auto_installed):
deb_is_auto = False
break
cache.clear()
if deb_is_auto:
duplicates.append(deb)
return duplicates
def get_snap_transitions(self):
# populate snap_list with deb2snap transitions
snap_list = {}
seeded_snaps, unseeded_snaps = self.get_snap_seeds()
for snap, (deb, to_channel) in seeded_snaps.items():
snap_object = {}
# check if the snap is already installed
snap_info = subprocess.Popen(["snap", "info", snap],
universal_newlines=True,
stdout=subprocess.PIPE).communicate()
if re.search("^installed: ", snap_info[0], re.MULTILINE):
logging.debug("Snap %s is installed" % snap)
continue
elif (deb in self.window_main.duplicate_packages):
# install the snap if the deb was just marked delete
snap_object['command'] = 'install'
snap_object['channel'] = to_channel
snap_list[snap] = snap_object
for snap, (from_channel) in unseeded_snaps.items():
snap_object = {}
# check if the snap is already installed
snap_info = subprocess.Popen(["snap", "info", snap],
universal_newlines=True,
stdout=subprocess.PIPE).communicate()
if re.search("^installed: ", snap_info[0], re.MULTILINE):
logging.debug("Snap %s is installed" % snap)
# its not tracking the release channel so don't remove
re_channel = "stable/ubuntu-[0-9][0-9].[0-9][0-9]"
if not re.search(r"^tracking:.*%s" % re_channel,
snap_info[0], re.MULTILINE):
logging.debug("Snap %s is not tracking the release channel"
% snap)
continue
snap_object['command'] = 'remove'
# check if this snap is being used by any other snaps
conns = subprocess.Popen(["snap", "connections", snap],
universal_newlines=True,
stdout=subprocess.PIPE).communicate()
for conn in conns[0].split('\n'):
conn_cols = conn.split()
if len(conn_cols) != 4:
continue
plug = conn_cols[1]
slot = conn_cols[2]
if slot.startswith(snap + ':'):
plug_snap = plug.split(':')[0]
if plug_snap != '-' and \
plug_snap not in unseeded_snaps:
logging.debug("Snap %s is being used by %s. "
"Switching it to stable track"
% (snap, plug_snap))
snap_object['command'] = 'refresh'
snap_object['channel'] = 'stable'
break
snap_list[snap] = snap_object
return snap_list
def update_snap_cb(self, client, change, _, user_data):
index, count, progress_bar = user_data
if not progress_bar:
return
# determine how much of this change has been done
task_total = 0
task_done = 0
for task in change.get_tasks():
task_total += task.get_progress_total()
task_done += task.get_progress_done()
task_fraction = task_done / task_total
# determine how much total progress has been made
total_fraction = (task_fraction / count) + (index / count)
# change.get_tasks() can increase between callbacks so we must
# avoid jumping backward in progress here
if total_fraction > progress_bar.get_fraction():
GLib.idle_add(progress_bar.set_fraction, total_fraction)
def update_snaps(self):
# update status and progress bar
def update_status(status):
GLib.idle_add(self.label_details.set_label, status)
def update_progress(progress_bar):
progress_bar.pulse()
return True
update_status(_("Updating snaps"))
progress_bar = None
progress_timer = None
progress_bars = self.progressbar_slot.get_children()
if progress_bars and isinstance(progress_bars[0], Gtk.ProgressBar):
progress_bar = progress_bars[0]
progress_timer = GLib.timeout_add(100, update_progress,
progress_bar)
# populate snap_list with deb2snap transitions
snap_list = self.get_snap_transitions()
if progress_timer:
GLib.source_remove(progress_timer)
progress_bar.set_fraction(0)
# (un)install (un)seeded snap(s)
try:
client = Snapd.Client()
client.connect_sync()
index = 0
count = len(snap_list)
for snap, snap_object in snap_list.items():
command = snap_object['command']
if command == 'refresh':
update_status(_("Refreshing %s snap" % snap))
client.refresh_sync(snap, snap_object['channel'],
self.update_snap_cb,
progress_callback_data=(index, count,
progress_bar))
elif command == 'remove':
update_status(_("Removing %s snap" % snap))
client.remove_sync(snap, self.update_snap_cb,
progress_callback_data=(index, count,
progress_bar))
else:
update_status(_("Installing %s snap" % snap))
client.install_sync(snap, snap_object['channel'],
self.update_snap_cb,
progress_callback_data=(index, count,
progress_bar))
index += 1
except GLib.Error as e:
logging.debug("error updating snaps (%s)" % e)
GLib.idle_add(self.window_main.start_error, False,
_("Upgrade only partially completed."),
_("An error occurred while updating snaps. "
"Please check your network connection."))
return
# continue with the rest of the updates
GLib.idle_add(self.window_main.start_available)
def _action_done(self, action, authorized, success, error_string,
error_desc, trans_failed=False):
# If the progress dialog should be closed automatically afterwards
#settings = Gio.Settings.new("com.ubuntu.update-manager")
#close_after_install = settings.get_boolean(
# "autoclose-install-window")
# FIXME: confirm with mpt whether this should still be a setting
#close_after_install = False
if action == self.ACTION_PRE_INSTALL and success:
# Now do the regular updates
self.action = self.ACTION_INSTALL
self.start()
elif action == self.ACTION_INSTALL:
if (success and os.path.exists("/usr/bin/snap")
and hasattr(self, 'pane_update_progress')):
Thread(target=self.update_snaps).start()
elif success:
self.window_main.start_available()
elif error_string:
self.window_main.start_error(trans_failed, error_string,
error_desc)
else:
# exit gracefuly, we can't just exit as this will trigger
# a crash if system.exit() is called in a exception handler
GLib.timeout_add(1, self.window_main.exit)
else:
if error_string:
self.window_main.start_error(True, error_string, error_desc)
elif (success and os.path.exists("/usr/bin/snap")
and hasattr(self, 'pane_update_progress')):
self.window_main.duplicate_packages = self.get_deb2snap_dups()
self.window_main.start_available()
else:
is_cancelled_update = not success
self.window_main.start_available(is_cancelled_update)
# try aptdaemon
if os.path.exists("/usr/sbin/aptd") \
and "UPDATE_MANAGER_FORCE_BACKEND_SYNAPTIC" not in os.environ:
# check if the gtkwidgets are installed as well
try:
from .InstallBackendAptdaemon import InstallBackendAptdaemon
except ImportError:
logging.exception("importing aptdaemon")
# try synaptic
if os.path.exists("/usr/sbin/synaptic") \
and "UPDATE_MANAGER_FORCE_BACKEND_APTDAEMON" not in os.environ:
try:
from .InstallBackendSynaptic import InstallBackendSynaptic
except ImportError:
logging.exception("importing synaptic")
def get_backend(*args, **kwargs):
"""Select and return a package manager backend."""
# try aptdaemon
if (os.path.exists("/usr/sbin/aptd")
and "UPDATE_MANAGER_FORCE_BACKEND_SYNAPTIC" not in os.environ):
# check if the gtkwidgets are installed as well
try:
return InstallBackendAptdaemon(*args, **kwargs)
except NameError:
logging.exception("using aptdaemon failed")
# try synaptic
if (os.path.exists("/usr/sbin/synaptic")
and "UPDATE_MANAGER_FORCE_BACKEND_APTDAEMON" not in os.environ):
try:
return InstallBackendSynaptic(*args, **kwargs)
except NameError:
pass
# nothing found, raise
raise Exception("No working backend found, please try installing "
"aptdaemon or synaptic")
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