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# DistUpgradeFetcher.py
#
# Copyright (c) 2006 Canonical
#
# Author: Michael Vogt <michael.vogt@ubuntu.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
import pygtk
pygtk.require('2.0')
import gtk
import os
import apt_pkg
import tarfile
import urllib2
import tempfile
import shutil
import GnuPGInterface
from gettext import gettext as _
import GtkProgress
from ReleaseNotesViewer import ReleaseNotesViewer
from Common.utils import *
class DistUpgradeFetcher(object):
def __init__(self, parent, new_dist):
self.parent = parent
self.window_main = parent.window_main
self.new_dist = new_dist
def showReleaseNotes(self):
# FIXME: care about i18n! (append -$lang or something)
if self.new_dist.releaseNotesURI != None:
uri = self.new_dist.releaseNotesURI
self.window_main.set_sensitive(False)
self.window_main.window.set_cursor(gtk.gdk.Cursor(gtk.gdk.WATCH))
while gtk.events_pending():
gtk.main_iteration()
# download/display the release notes
# FIXME: add some progress reporting here
res = gtk.RESPONSE_CANCEL
try:
release_notes = urllib2.urlopen(uri)
notes = release_notes.read()
textview_release_notes = ReleaseNotesViewer(notes)
textview_release_notes.show()
self.parent.scrolled_notes.add(textview_release_notes)
self.parent.dialog_release_notes.set_transient_for(self.window_main)
res = self.parent.dialog_release_notes.run()
self.parent.dialog_release_notes.hide()
except urllib2.HTTPError:
primary = "<span weight=\"bold\" size=\"larger\">%s</span>" % \
_("Could not find the release notes")
secondary = _("The server may be overloaded. ")
dialog = gtk.MessageDialog(self.window_main,gtk.DIALOG_MODAL,
gtk.MESSAGE_ERROR,gtk.BUTTONS_CLOSE,"")
dialog.set_title("")
dialog.set_markup(primary);
dialog.format_secondary_text(secondary);
dialog.run()
dialog.destroy()
except IOError:
primary = "<span weight=\"bold\" size=\"larger\">%s</span>" % \
_("Could not download the release notes")
secondary = _("Please check your internet connection.")
dialog = gtk.MessageDialog(self.window_main,gtk.DIALOG_MODAL,
gtk.MESSAGE_ERROR,gtk.BUTTONS_CLOSE,"")
dialog.set_title("")
dialog.set_markup(primary);
dialog.format_secondary_text(secondary);
dialog.run()
dialog.destroy()
self.window_main.set_sensitive(True)
self.window_main.window.set_cursor(None)
# user clicked cancel
if res == gtk.RESPONSE_CANCEL:
return False
return True
def authenticate(self):
if self.new_dist.upgradeToolSig:
f = self.tmpdir+"/"+os.path.basename(self.new_dist.upgradeTool)
sig = self.tmpdir+"/"+os.path.basename(self.new_dist.upgradeToolSig)
print "authenticate '%s' against '%s' " % (f,sig)
if not self.gpgauthenticate(f, sig):
return False
# we may return False here by default if we want to make a sig
# mandatory
return True
def gpgauthenticate(self, file, signature,
keyring='/etc/apt/trusted.gpg',
trustdb='/etc/apt/trustdb.gpg'):
""" authenticated a file against a given signature, if no keyring
is given use the apt default keyring
"""
gpg = GnuPGInterface.GnuPG()
gpg.options.extra_args = ['--no-options',
'--no-default-keyring',
'--trustdb-name',trustdb,
'--keyring', keyring]
proc = gpg.run(['--verify', signature, file],
create_fhs=['status','logger','stderr'])
gpgres = proc.handles['status'].read()
try:
proc.wait()
except IOError,e:
# gnupg returned a problem (non-zero exit)
print "exception from gpg: %s" % e
return False
if "VALIDSIG" in gpgres:
return True
print "invalid result from gpg:"
print gpgres
return False
def extractDistUpgrader(self):
# extract the tarbal
print "extracting '%s'" % (self.tmpdir+"/"+os.path.basename(self.uri))
tar = tarfile.open(self.tmpdir+"/"+os.path.basename(self.uri),"r")
for tarinfo in tar:
tar.extract(tarinfo)
tar.close()
return True
def verifyDistUprader(self):
# FIXME: check a internal dependency file to make sure
# that the script will run correctly
# see if we have a script file that we can run
self.script = script = "%s/%s" % (self.tmpdir, self.new_dist.name)
if not os.path.exists(script):
# no script file found in extracted tarbal
primary = "<span weight=\"bold\" size=\"larger\">%s</span>" % \
_("Could not run the upgrade tool")
secondary = _("This is most likely a bug in the upgrade tool. "
"Please report it as a bug")
dialog = gtk.MessageDialog(self.window_main,gtk.DIALOG_MODAL,
gtk.MESSAGE_ERROR,gtk.BUTTONS_CLOSE,"")
dialog.set_title("")
dialog.set_markup(primary);
dialog.format_secondary_text(secondary);
dialog.run()
dialog.destroy()
return False
return True
def fetchDistUpgrader(self):
# now download the tarball with the upgrade script
self.tmpdir = tmpdir = tempfile.mkdtemp()
os.chdir(tmpdir)
# turn debugging on here (if required)
#apt_pkg.Config.Set("Debug::Acquire::http","1")
progress = GtkProgress.GtkFetchProgress(self.parent,
_("Downloading the upgrade "
"tool"),
_("The upgrade tool will "
"guide you through the "
"upgrade process."))
fetcher = apt_pkg.GetAcquire(progress)
if self.new_dist.upgradeToolSig != None:
uri = self.new_dist.upgradeToolSig
af = apt_pkg.GetPkgAcqFile(fetcher,uri, descr=_("Upgrade tool signature"))
if self.new_dist.upgradeTool != None:
self.uri = self.new_dist.upgradeTool
af = apt_pkg.GetPkgAcqFile(fetcher,self.uri, descr=_("Upgrade tool"))
if fetcher.Run() != fetcher.ResultContinue:
return False
return True
return False
def runDistUpgrader(self):
#print "runing: %s" % script
os.execv(self.script,[])
def cleanup(self):
# cleanup
os.chdir("..")
# del tmpdir
shutil.rmtree(self.tmpdir)
def run(self):
# see if we have release notes
if not self.showReleaseNotes():
return
if not self.fetchDistUpgrader():
error(self.window_main,
_("Failed to fetch"),
_("Fetching the upgrade failed. There may be a network "
"problem. "))
return
if not self.extractDistUpgrader():
error(self.window_main,
_("Failed to extract"),
_("Extracting the upgrade failed. There may be a problem "
"with the network or with the server. "))
return
if not self.verifyDistUprader():
error(self.window_main,
_("Verfication failed"),
_("Verfing the upgrade failed. There may be a problem "
"with the network or with the server. "))
self.cleanup()
return
if not self.authenticate():
error(self.window_main,
_("Authentication failed"),
_("Authenticating the upgrade failed. There may be a problem "
"with the network or with the server. "))
self.cleanup()
return
self.runDistUpgrader()
if __name__ == "__main__":
error(None, "summary","message")
d = DistUpgradeFetcher(None,None)
print d.authenticate('/tmp/Release','/tmp/Release.gpg')
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