~ubuntu-core-dev/update-manager/main

# UpdateManager.py

# -*- Mode: Python; indent-tabs-mode: nil; tab-width: 4; coding: utf-8 -*-

#

#  Copyright (c) 2012 Canonical

#

#  Author: Michael Terry <michael.terry@canonical.com>

#

#  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; either version 2 of the

#  License, or (at your option) any later version.

#

#  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., 59 Temple Place, Suite 330, Boston, MA 02111-1307

#  USA

from __future__ import absolute_import, print_function

from gi.repository import Gtk

from gi.repository import Gdk, GdkX11

from gi.repository import Gio

from gi.repository import GLib

from gi.repository import GObject

GdkX11  # pyflakes

import warnings

warnings.filterwarnings("ignore", "Accessed deprecated property",

                        DeprecationWarning)

import distro_info

import fnmatch

import os

import subprocess

import sys

import time

from gettext import gettext as _

from uaclient.api.u.pro.packages.updates.v1 import updates

import dbus

import dbus.service

from dbus.mainloop.glib import DBusGMainLoop

DBusGMainLoop(set_as_default=True)

from .UnitySupport import UnitySupport

from .Dialogs import (DistUpgradeDialog,

                      ErrorDialog,

                      HWEUpgradeDialog,

                      NeedRestartDialog,

                      NoUpdatesDialog,

                      NoUpgradeForYouDialog,

                      PartialUpgradeDialog,

                      StoppedUpdatesDialog,

                      UnsupportedDialog,

                      UpdateErrorDialog)

from .MetaReleaseGObject import MetaRelease

from .UpdatesAvailable import UpdatesAvailable

from .Core.AlertWatcher import AlertWatcher

from .Core.MyCache import MyCache

from .Core.roam import NetworkManagerHelper

from .Core.UpdateList import UpdateList

from .Core.utils import get_arch, get_dist

from .backend import (InstallBackend,

                      get_backend)

# file that signals if we need to reboot

REBOOT_REQUIRED_FILE = "/var/run/reboot-required"

class UpdateManager(Gtk.Window):

    """ This class is the main window and work flow controller. The main

        window will show panes, and it will morph between them. """

    def __init__(self, datadir, options):

        Gtk.Window.__init__(self)

        # Public members

        self.datadir = datadir

        self.options = options

        self.unity = UnitySupport()

        self.controller = None

        self.cache = None

        self.ua_security_packages = []

        self.update_list = None

        self.meta_release = None

        self.hwe_replacement_packages = None

        self.oem_metapackages = set()

        self.duplicate_packages = []

        self.arch = get_arch()

        # Basic GTK+ parameters

        self.set_title(_("Software Updater"))

        self.set_icon_name("system-software-update")

        self.set_position(Gtk.WindowPosition.CENTER)

        # Keep window at a constant size

        ctx = self.get_style_context()

        self.style_changed = ctx.connect("changed",

                                         lambda ctx:

                                             self.resize_to_standard_width())

        # Signals

        self.connect("delete-event", self._on_close)

        self._setup_dbus()

        # deal with no-focus-on-map

        if self.options and self.options.no_focus_on_map:

            self.set_focus_on_map(False)

            self.iconify()

            self.stick()

            self.set_urgency_hint(True)

            self.unity.set_urgency(True)

            self.initial_focus_id = self.connect(

                "focus-in-event", self.on_initial_focus_in)

        # Look for a new release in a thread

        self.meta_release = MetaRelease(

            self.options and self.options.devel_release,

            self.options and self.options.use_proposed,

            self.options and self.options.debug)

    def begin_user_resizable(self, stored_width=0, stored_height=0):

        self.set_resizable(True)

        if stored_width > 0 and stored_height > 0:

            # There is a race here.  If we immediately resize, it often doesn't

            # take.  Using idle_add helps, but we *still* occasionally don't

            # restore the size correctly.  Help needed to track this down!

            GLib.idle_add(lambda: self.resize(stored_width, stored_height))

    def end_user_resizable(self):

        self.set_resizable(False)

    def resize_to_standard_width(self):

        if self.get_resizable():

            return  # only size to a specific em if we are a static size

        num_em = 33  # per SoftwareUpdates spec

        dpi = self.get_screen().get_resolution()

        if dpi <= 0:

            dpi = 96

        ctx = self.get_style_context()

        GObject.signal_handler_block(ctx, self.style_changed)

        size = ctx.get_property("font-size", Gtk.StateFlags.NORMAL)

        width = dpi / 72 * size * num_em

        self.set_size_request(width, -1)

        GObject.signal_handler_unblock(ctx, self.style_changed)

    def on_initial_focus_in(self, widget, event):

        """callback run on initial focus-in (if started unmapped)"""

        self.unstick()

        self.set_urgency_hint(False)

        self.unity.set_urgency(False)

        self.disconnect(self.initial_focus_id)

        return False

    def _start_pane(self, pane):

        if self.controller is not None:

            self.controller.stop()

            if isinstance(self.controller, Gtk.Widget):

                self.controller.destroy()

        self.controller = pane

        self._look_ready()

        self.end_user_resizable()

        if pane is None:

            return

        if isinstance(pane, Gtk.Widget):

            self.add(pane)

            pane.start()

            self.show_all()

        else:

            pane.start()

            self.hide()

    def _on_close(self, widget, data=None):

        return self.close()

    def close(self):

        if not self.get_sensitive():

            return True

        if self.controller:

            controller_close = self.controller.close()

            if controller_close:

                return controller_close

        self.exit()

    def exit(self):

        """ exit the application, save the state """

        self._start_pane(None)

        sys.exit(0)

    def show_settings(self):

        cmd = ["/usr/bin/software-properties-gtk",

               "--open-tab", "2"]

        if "WAYLAND_DISPLAY" not in os.environ:

            cmd += ["--toplevel", "%s" % self.get_window().get_xid()]

        self._look_busy()

        try:

            p = subprocess.Popen(cmd)

        except OSError:

            pass

        else:

            while p.poll() is None:

                while Gtk.events_pending():

                    Gtk.main_iteration()

                time.sleep(0.05)

        finally:

            self.start_available()

    def start_update(self):

        if self.options.no_update:

            self.start_available()

            return

        update_backend = get_backend(self, InstallBackend.ACTION_UPDATE)

        self._start_pane(update_backend)

    def start_install(self, hwe_upgrade=False):

        install_backend = get_backend(self, InstallBackend.ACTION_PRE_INSTALL)

        if hwe_upgrade:

            for pkgname in self.hwe_replacement_packages:

                try:

                    self.cache[pkgname].mark_install()

                except SystemError:

                    pass

        self._start_pane(install_backend)

    def start_available(self, cancelled_update=False, error_occurred=False):

        self._look_busy()

        self.refresh_cache()

        if self.cache is None:

            return

        pane = self._make_available_pane(self.cache.install_count

                                         + self.cache.del_count,

                                         os.path.exists(REBOOT_REQUIRED_FILE),

                                         cancelled_update, error_occurred)

        self._start_pane(pane)

    def _check_oem_metapackages(self):

        di = distro_info.UbuntuDistroInfo()

        codename = get_dist()

        lts = di.is_lts(codename)

        if not lts:

            return None

        OEM_PATH = os.path.join(GLib.get_user_runtime_dir(),

                                "ubuntu-drivers-oem.package-list")

        if not os.path.exists(OEM_PATH):

            return None

        # Packages that aren't installed but apply to this system

        with open(OEM_PATH, 'r') as f:

            self.oem_metapackages |= set(f.read().splitlines())

        # Packages that are already installed

        for pkg in self.cache:

            if fnmatch.fnmatch(pkg.name, 'oem-*-meta') \

               and pkg.installed:

                self.oem_metapackages.add(pkg)

    def _get_ua_security_status(self):

        self.ua_security_packages = []

        update_result = updates()

        for info in update_result.updates:

            if info.status == 'pending_attach':

                self.ua_security_packages.append((info.name, info.version, info.download_size))

    def _make_available_pane(self, install_count, need_reboot=False,

                             cancelled_update=False, error_occurred=False):

        self._check_hwe_support_status()

        if install_count == 0:

            # Need Restart > New Release > No Updates

            if need_reboot:

                return NeedRestartDialog(self)

            dist_upgrade = self._check_meta_release()

            if dist_upgrade:

                return dist_upgrade

            elif cancelled_update:

                return StoppedUpdatesDialog(self)

            elif self.hwe_replacement_packages:

                return HWEUpgradeDialog(self)

            else:

                return NoUpdatesDialog(self, error_occurred=error_occurred)

        else:

            header = None

            desc = None

            if error_occurred:

                desc = _("Some software couldn’t be checked for updates.")

            elif cancelled_update:

                header = _("You stopped the check for updates.")

                desc = _("Updated software is available from "

                         "a previous check.")

            # Display HWE updates first as an old HWE stack is vulnerable

            elif self.hwe_replacement_packages:

                return HWEUpgradeDialog(self)

            return UpdatesAvailable(self, header, desc, need_reboot)

    def start_error(self, update_and_retry, header, desc):

        if update_and_retry:

            self._start_pane(UpdateErrorDialog(self, header, desc))

        else:

            self._start_pane(ErrorDialog(self, header, desc))

    def _look_busy(self):

        self.set_sensitive(False)

        if self.get_window() is not None:

            self.get_window().set_cursor(Gdk.Cursor.new(Gdk.CursorType.WATCH))

    def _look_ready(self):

        self.set_sensitive(True)

        if self.get_window() is not None:

            self.get_window().set_cursor(None)

            self.get_window().set_functions(Gdk.WMFunction.ALL)

    def _check_meta_release(self):

        if self.meta_release is None:

            return None

        if self.meta_release.downloading:

            # Block until we get an answer

            GLib.idle_add(self._meta_release_wait_idle)

            Gtk.main()

        # Check if there is anything to upgrade to or a known-broken upgrade

        next = self.meta_release.upgradable_to

        if not next or next.upgrade_broken:

            return None

        # Check for end-of-life

        if self.meta_release.no_longer_supported:

            return UnsupportedDialog(self, self.meta_release)

        # Check for new fresh release

        settings = Gio.Settings.new("com.ubuntu.update-manager")

        if (self.meta_release.new_dist

                and (self.options.check_dist_upgrades

                     or settings.get_boolean("check-dist-upgrades"))):

            if self.arch == 'i386':

                return NoUpgradeForYouDialog(self, self.meta_release,

                                             self.arch)

            return DistUpgradeDialog(self, self.meta_release)

        return None

    def _meta_release_wait_idle(self):

        # 'downloading' is changed in a thread, but the signal

        # 'done_downloading' is done in our thread's event loop.  So we know

        # that it won't fire while we're in this function.

        if not self.meta_release.downloading:

            Gtk.main_quit()

        else:

            self.meta_release.connect("done_downloading", Gtk.main_quit)

        return False

    def _check_hwe_support_status(self):

        di = distro_info.UbuntuDistroInfo()

        codename = get_dist()

        lts = di.is_lts(codename)

        if not lts:

            return None

        HWE = "/usr/bin/hwe-support-status"

        if not os.path.exists(HWE):

            return None

        cmd = [HWE, "--show-replacements"]

        self._parse_hwe_support_status(cmd)

    def _parse_hwe_support_status(self, cmd):

        try:

            subprocess.check_output(cmd)

            # for debugging

            # print("nothing unsupported running")

        except subprocess.CalledProcessError as e:

            if e.returncode == 10:

                packages = e.output.strip().split()

                self.hwe_replacement_packages = []

                for pkgname in packages:

                    pkgname = pkgname.decode('utf-8')

                    if pkgname in self.cache and \

                            not self.cache[pkgname].is_installed:

                        self.hwe_replacement_packages.append(pkgname)

                # for debugging

                # print(self.hwe_replacement_packages)

    # fixme: we should probably abstract away all the stuff from libapt

    def refresh_cache(self):

        try:

            if self.cache is None:

                self.cache = MyCache(None)

            else:

                self.cache.open(None)

                self.cache._initDepCache()

        except AssertionError:

            # if the cache could not be opened for some reason,

            # let the release upgrader handle it, it deals

            # a lot better with this

            self._start_pane(PartialUpgradeDialog(self))

            # we assert a clean cache

            header = _("Software index is broken")

            desc = _("It is impossible to install or remove any software. "

                     "Please use the package manager \"Synaptic\" or run "

                     "\"sudo apt-get install -f\" in a terminal to fix "

                     "this issue at first.")

            self.start_error(False, header, desc)

            return

        except SystemError as e:

            header = _("Could not initialize the package information")

            desc = _("An unresolvable problem occurred while "

                     "initializing the package information.\n\n"

                     "Please report this bug against the 'update-manager' "

                     "package and include the following error "

                     "message:\n") + str(e)

            self.start_error(False, header, desc)

            return

        # Let the Gtk event loop breath if it hasn't had a chance.

        def iterate():

            while Gtk.events_pending():

                Gtk.main_iteration()

        iterate()

        self._check_oem_metapackages()

        self._get_ua_security_status()

        for pkgname in self.oem_metapackages:

            try:

                if not self.cache[pkgname].is_installed:

                    self.cache[pkgname].mark_install()

            except SystemError:

                pass

        self.update_list = UpdateList(self)

        try:

            self.update_list.update(self.cache, eventloop_callback=iterate,

                                    duplicate_packages=self.duplicate_packages,

                                    ua_security_packages=self.

                                    ua_security_packages)

        except SystemError as e:

            header = _("Could not calculate the upgrade")

            desc = _("An unresolvable problem occurred while "

                     "calculating the upgrade.\n\n"

                     "Please report this bug against the 'update-manager' "

                     "package and include the following error "

                     "message:\n") + str(e)

            self.start_error(True, header, desc)

        if self.update_list.distUpgradeWouldDelete > 0:

            self._start_pane(PartialUpgradeDialog(self))

    def _setup_dbus(self):

        """ this sets up a dbus listener if none is installed already """

        # check if there is another g-a-i already and if not setup one

        # listening on dbus

        try:

            bus = dbus.SessionBus()

        except Exception:

            print("warning: could not initiate dbus")

            return

        try:

            proxy_obj = bus.get_object('org.freedesktop.UpdateManager',

                                       '/org/freedesktop/UpdateManagerObject')

            iface = dbus.Interface(proxy_obj,

                                   'org.freedesktop.UpdateManagerIFace')

            iface.bringToFront()

            #print("send bringToFront")

            sys.exit(0)

        except dbus.DBusException:

            #print("no listening object (%s) " % e)

            bus_name = dbus.service.BusName('org.freedesktop.UpdateManager',

                                            bus)

            self.dbusController = UpdateManagerDbusController(self, bus_name)

class UpdateManagerDbusController(dbus.service.Object):

    """ this is a helper to provide the UpdateManagerIFace """

    def __init__(self, parent, bus_name,

                 object_path='/org/freedesktop/UpdateManagerObject'):

        dbus.service.Object.__init__(self, bus_name, object_path)

        self.parent = parent

        self.alert_watcher = AlertWatcher()

        self.alert_watcher.connect("network-alert", self._on_network_alert)

        self.connected = False

    @dbus.service.method('org.freedesktop.UpdateManagerIFace')

    def bringToFront(self):

        self.parent.present()

        return True

    @dbus.service.method('org.freedesktop.UpdateManagerIFace')

    def upgrade(self):

        try:

            self.parent.start_install()

            return True

        except Exception:

            return False

    def _on_network_alert(self, watcher, state):

        if state in NetworkManagerHelper.NM_STATE_CONNECTED_LIST:

            self.connected = True

        else:

            self.connected = False