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# software-properties backend
#
# Copyright (c) 2004-2007 Canonical Ltd.
# 2004-2005 Michiel Sikkes
#
# Author: Michiel Sikkes <michiel@eyesopened.nl>
# Michael Vogt <mvo@debian.org>
# Sebastian Heinlein <glatzor@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 apt
import apt_pkg
from hashlib import md5
import re
import os
import glob
import inspect
import sys
import shutil
import subprocess
import threading
import atexit
import tempfile
import string
import stat
from tempfile import NamedTemporaryFile
from xml.sax.saxutils import escape
from ConfigParser import ConfigParser
from gettext import gettext as _
from urlparse import urlparse
import aptsources
import aptsources.distro
import softwareproperties
from AptAuth import AptAuth
from aptsources.sourceslist import SourcesList, SourceEntry
from ppa import AddPPASigningKeyThread, expand_ppa_line
class SoftwareProperties(object):
# known (whitelisted) channels
CHANNEL_PATH="/usr/share/app-install/channels/"
# release upgrades policy
RELEASE_UPGRADES_CONF = "/etc/update-manager/release-upgrades"
#RELEASE_UPGRADES_CONF = "/tmp/release-upgrades"
(
RELEASE_UPGRADES_NORMAL,
RELEASE_UPGRADES_LTS,
RELEASE_UPGRADES_NEVER
) = range(3)
release_upgrades_policy_map = {
RELEASE_UPGRADES_NORMAL : 'normal',
RELEASE_UPGRADES_LTS : 'lts',
RELEASE_UPGRADES_NEVER : 'never',
}
def __init__(self, datadir=None, options=None, rootdir="/"):
""" Provides the core functionality to configure the used software
repositories, the corresponding authentication keys and
update automation """
self.popconfile = rootdir+"/etc/popularity-contest.conf"
self.rootdir = rootdir
if rootdir != "/":
apt_pkg.config.set("Dir", rootdir)
# FIXME: some saner way is needed here
if datadir == None:
datadir = "/usr/share/software-properties/"
self.options = options
self.datadir = datadir
self.sourceslist = SourcesList()
self.distro = aptsources.distro.get_distro()
self.seen_server = []
self.modified_sourceslist = False
self.reload_sourceslist()
self.backup_sourceslist()
self.backup_apt_conf()
# FIXME: we need to store this value in a config option
#self.custom_mirrors = ["http://adasdwww.de/ubuntu"]
self.custom_mirrors= []
# apt-key stuff
self.apt_key = AptAuth(rootdir=rootdir)
atexit.register(self.wait_for_threads)
def wait_for_threads(self):
" wait for all running threads (PPA key fetchers) to exit "
for t in threading.enumerate():
if t.ident != threading.current_thread().ident:
t.join()
def backup_apt_conf(self):
"""Backup all apt configuration options"""
self.apt_conf_backup = {}
for option in softwareproperties.CONF_MAP.keys():
value = apt_pkg.config.find_i(softwareproperties.CONF_MAP[option])
self.apt_conf_backup[option] = value
def restore_apt_conf(self):
"""Restore the stored apt configuration"""
for option in self.apt_conf_backup.keys():
apt_pkg.config.set(softwareproperties.CONF_MAP[option],
str(self.apt_conf_backup[option]))
self.write_config()
def get_update_automation_level(self):
""" Parse the apt cron configuration. Try to fit a predefined use case
and return it. Special case: if the user made a custom
configurtation, that we cannot represent it will return None """
if apt_pkg.config.find_i(softwareproperties.CONF_MAP["autoupdate"]) > 0:
# Autodownload
if apt_pkg.config.find_i(softwareproperties.CONF_MAP["unattended"]) == 1\
and apt_pkg.config.find_i(softwareproperties.CONF_MAP["autodownload"]) == 1 :
return softwareproperties.UPDATE_INST_SEC
elif apt_pkg.config.find_i(softwareproperties.CONF_MAP["autodownload"]) == 1 and \
apt_pkg.config.find_i(softwareproperties.CONF_MAP["unattended"]) == 0:
return softwareproperties.UPDATE_DOWNLOAD
elif apt_pkg.config.find_i(softwareproperties.CONF_MAP["unattended"]) == 0 and \
apt_pkg.config.find_i(softwareproperties.CONF_MAP["autodownload"]) == 0:
return softwareproperties.UPDATE_NOTIFY
else:
return None
elif apt_pkg.config.find_i(softwareproperties.CONF_MAP["unattended"]) == 0 and \
apt_pkg.config.find_i(softwareproperties.CONF_MAP["autodownload"]) == 0:
return softwareproperties.UPDATE_MANUAL
else:
return None
def set_update_automation_level(self, state):
""" Set the apt periodic configurtation to the selected
update automation level. To synchronize the cache update and the
actual upgrading function, the upgrade function, e.g. unattended,
will run every day, if enabled. """
if state == softwareproperties.UPDATE_INST_SEC:
apt_pkg.config.set(softwareproperties.CONF_MAP["unattended"], str(1))
apt_pkg.config.set(softwareproperties.CONF_MAP["autodownload"], str(1))
elif state == softwareproperties.UPDATE_DOWNLOAD:
apt_pkg.config.set(softwareproperties.CONF_MAP["autodownload"], str(1))
apt_pkg.config.set(softwareproperties.CONF_MAP["unattended"], str(0))
elif state == softwareproperties.UPDATE_NOTIFY:
apt_pkg.config.set(softwareproperties.CONF_MAP["autodownload"], str(0))
apt_pkg.config.set(softwareproperties.CONF_MAP["unattended"], str(0))
else:
apt_pkg.config.set(softwareproperties.CONF_MAP["autoupdate"], str(0))
apt_pkg.config.set(softwareproperties.CONF_MAP["unattended"], str(0))
apt_pkg.config.set(softwareproperties.CONF_MAP["autodownload"], str(0))
self.set_modified_config()
def set_update_interval(self, days):
"""Set the interval in which we check for available updates"""
# Only write the key if it has changed
if not days == apt_pkg.config.find_i(softwareproperties.CONF_MAP["autoupdate"]):
apt_pkg.config.set(softwareproperties.CONF_MAP["autoupdate"], str(days))
self.set_modified_config()
def get_update_interval(self):
""" Returns the interval of the apt periodic cron job """
return apt_pkg.config.find_i(softwareproperties.CONF_MAP["autoupdate"])
def get_release_upgrades_policy(self):
"""
return the release upgrade policy:
RELEASE_UPGRADES_NORMAL,
RELEASE_UPGRADES_LTS,
RELEASE_UPGRADES_NEVER
"""
# default (if no option is set) is NORMAL
if not os.path.exists(self.RELEASE_UPGRADES_CONF):
return self.RELEASE_UPGRADES_NORMAL
parser = ConfigParser()
parser.read(self.RELEASE_UPGRADES_CONF)
if parser.has_option("DEFAULT","Prompt"):
type = parser.get("DEFAULT","Prompt").lower()
for k, v in self.release_upgrades_policy_map.iteritems():
if v == type:
return k
return self.RELEASE_UPGRADES_NORMAL
def set_release_upgrades_policy(self, i):
"""
set the release upgrade policy:
RELEASE_UPGRADES_NORMAL,
RELEASE_UPGRADES_LTS,
RELEASE_UPGRADES_NEVER
"""
# we are note using ConfigParser.write() as it removes comments
if not os.path.exists(self.RELEASE_UPGRADES_CONF):
f = open(self.RELEASE_UPGRADES_CONF,"w")
f.write("[DEFAULT]\nprompt=%s\n"% self.release_upgrades_policy_map[i])
return True
f = open(self.RELEASE_UPGRADES_CONF,"r")
out = NamedTemporaryFile()
for line in map(string.strip, f.readlines()):
if line.lower().startswith("prompt"):
out.write("prompt=%s\n" % self.release_upgrades_policy_map[i])
else:
out.write(line+"\n")
out.flush()
shutil.copymode(self.RELEASE_UPGRADES_CONF, out.name)
shutil.copy(out.name, self.RELEASE_UPGRADES_CONF)
return True
def get_popcon_participation(self):
""" Will return True if the user wants to participate in the popularity
contest. Otherwise it will return False. Special case: if no
popcon is installed it will return False """
if os.path.exists(self.popconfile):
lines = open(self.popconfile).read().split("\n")
active = False
for line in lines:
try:
(key,value) = line.split("=")
if key == "PARTICIPATE" and value.strip('"').lower() == "yes":
active = True
except ValueError:
continue
return active
else:
return False
def set_popcon_pariticipation(self, is_helpful):
""" Enable or disable the participation in the popularity contest """
if is_helpful == True:
value = "yes"
else:
value = "no"
if os.path.exists(self.popconfile):
# read the current config and replace the corresponding settings
# FIXME: should we check the other values, too?
lines = map(lambda line: re.sub(r'^(PARTICIPATE=)(".+?")',
'\\1"%s"' % value,
line),
open(self.popconfile, "r").readlines())
else:
# create a new popcon config file
m = md5()
m.update(open("/dev/urandom", "r").read(1024))
id = m.hexdigest()
lines = []
lines.append("MY_HOSTID=\"%s\"\n" % id)
lines.append("PARTICIPATE=\"%s\"\n" % str(value))
lines.append("USE_HTTP=\"yes\"\n")
open(self.popconfile, "w").writelines(lines)
def get_source_code_state(self):
"""Return True if all distro componets are also available as
source code. Otherwise return Flase. Special case: If the
configuration cannot be represented return None"""
if len(self.distro.source_code_sources) < 1:
# we don't have any source code sources, so
# uncheck the button
self.distro.get_source_code = False
return False
else:
# there are source code sources, so we check the button
self.distro.get_source_code = True
# check if there is a corresponding source code source for
# every binary source. if not set the checkbutton to inconsistent
templates = {}
sources = []
sources.extend(self.distro.main_sources)
sources.extend(self.distro.child_sources)
for source in sources:
if templates.has_key(source.template):
for comp in source.comps:
templates[source.template].add(comp)
else:
templates[source.template] = set(source.comps)
# add fake http sources for the cdrom, since the sources
# for the cdrom are only available in the internet
if len(self.distro.cdrom_sources) > 0:
templates[self.distro.source_template] = self.distro.cdrom_comps
for source in self.distro.source_code_sources:
if not templates.has_key(source.template) or \
(templates.has_key(source.template) and not \
(len(set(templates[source.template]) ^ set(source.comps)) == 0\
or (len(set(source.comps) ^ self.distro.enabled_comps) == 0))):
self.distro.get_source_code = False
return None
break
return True
def print_source_entry(self, source):
"""Print the data of a source entry to the command line"""
for (label, value) in [("URI:", source.uri),
("Comps:", source.comps),
("Enabled:", not source.disabled),
("Valid:", not source.invalid)]:
print " %s %s" % (label, value)
if source.template:
for (label, value) in [("MatchURI:", source.template.match_uri),
("BaseURI:", source.template.base_uri)]:
print " %s %s" % (label, value)
print "\n"
def massive_debug_output(self):
"""Print the complete sources.list"""
print "START SOURCES.LIST:"
for source in self.sourceslist:
print source.str()
print "END SOURCES.LIST\n"
def change_main_download_server(self, server):
""" change the main download server """
self.distro.default_server = server
res = self.distro.change_server(server)
self.set_modified_sourceslist()
return res
def enable_component(self, comp):
"""Enable a component of the distro"""
self.distro.enable_component(comp)
self.set_modified_sourceslist()
def disable_component(self, comp):
"""Disable a component of the distro"""
self.distro.disable_component(comp)
self.set_modified_sourceslist()
def _find_template_from_string(self, name):
for template in self.distro.source_template.children:
if template.name == name:
return template
def disable_child_source(self, template):
"""Enable a child repo of the distribution main repository"""
if isinstance(template, str):
template = self._find_template_from_string(template)
for source in self.distro.child_sources:
if source.template == template:
self.sourceslist.remove(source)
for source in self.distro.source_code_sources:
if source.template == template:
self.sourceslist.remove(source)
self.set_modified_sourceslist()
def enable_child_source(self, template):
"""Enable a child repo of the distribution main repository"""
if isinstance(template, str):
template = self._find_template_from_string(template)
# Use the currently selected mirror only if the child source
# did not override the server
if template.base_uri == None:
child_uri = self.distro.default_server
else:
child_uri = template.base_uri
self.distro.add_source(uri=child_uri, dist=template.name)
self.set_modified_sourceslist()
def disable_source_code_sources(self):
"""Remove all distro source code sources"""
sources = []
sources.extend(self.distro.main_sources)
sources.extend(self.distro.child_sources)
# remove all exisiting sources
for source in self.distro.source_code_sources:
self.sourceslist.remove(source)
self.set_modified_sourceslist()
def enable_source_code_sources(self):
"""Enable source code source for all distro sources"""
sources = []
sources.extend(self.distro.main_sources)
sources.extend(self.distro.child_sources)
# remove all exisiting sources
for source in self.distro.source_code_sources:
self.sourceslist.remove(source)
for source in sources:
self.sourceslist.add("deb-src",
source.uri,
source.dist,
source.comps,
"Added by software-properties",
self.sourceslist.list.index(source)+1,
source.file)
for source in self.distro.cdrom_sources:
self.sourceslist.add("deb-src",
self.distro.source_template.base_uri,
self.distro.source_template.name,
source.comps,
"Added by software-properties",
self.sourceslist.list.index(source)+1,
source.file)
self.set_modified_sourceslist()
def backup_sourceslist(self):
"""Store a backup of the source.list in memory"""
self.sourceslist_backup = []
for source in self.sourceslist.list:
source_bkp = SourceEntry(line=source.line,file=source.file)
self.sourceslist_backup.append(source_bkp)
def _find_source_from_string(self, line):
# ensure that we have a current list, it might have been changed underneath
# us
self.reload_sourceslist()
for source in self.sourceslist.list:
if str(source) == line:
return source
return None
def toggle_source_use(self, source):
"""Enable or disable the selected channel"""
#FIXME cdroms need to disable the comps in the childs and sources
if isinstance(source, str):
source = self._find_source_from_string(source)
source.disabled = not source.disabled
self.set_modified_sourceslist()
def replace_source_entry(self, old_entry, new_entry):
# find and replace, then write
for (index, entry) in enumerate(self.sourceslist.list):
if str(entry) == old_entry:
file = self.sourceslist.list[index].file
self.sourceslist.list[index] = SourceEntry(new_entry, file)
self.set_modified_sourceslist()
return True
return False
def revert(self):
"""Revert all settings to the state when software-properties
was launched"""
#FIXME: GPG keys are still missing
self.restore_apt_conf()
self.revert_sourceslist()
def revert_sourceslist(self):
"""Restore the source list from the startup of the dialog"""
self.sourceslist.list = []
for source in self.sourceslist_backup:
source_reset = SourceEntry(line=source.line,file=source.file)
self.sourceslist.list.append(source_reset)
self.save_sourceslist()
self.reload_sourceslist()
def set_modified_sourceslist(self):
"""The sources list was changed and now needs to be saved and reloaded"""
self.modified_sourceslist = True
if self.options and self.options.massive_debug:
self.massive_debug_output()
self.save_sourceslist()
self.reload_sourceslist()
def set_modified_config(self):
"""Write the changed apt configuration to file"""
self.write_config()
def render_source(self, source):
"""Render a nice output to show the source in a treeview"""
if source.template == None:
if source.comment:
contents = "<b>%s</b> (%s %s" % (escape(source.comment),
source.uri, source.dist)
# Only show the components if there are more than one
if len(source.comps) > 1:
for c in source.comps:
contents += " %s" % c
contents += ")"
else:
contents = "<b>%s %s</b>" % (source.uri, source.dist)
for c in source.comps:
contents += " %s" % c
if source.type in ("deb-src", "rpm-src"):
contents += " %s" % _("(Source Code)")
return contents
else:
# try to make use of a corresponding template
contents = "<b>%s</b>" % source.template.description
if source.type in ("deb-src", "rpm-src"):
contents += " (%s)" % _("Source Code")
if source.comment:
contents +=" %s" % source.comment
if source.template.child == False:
for comp in source.comps:
if source.template.has_component(comp):
# fixme: move something like this into distinfo.Template
# (why not use a dictionary again?)
for c in source.template.components:
if c.name == comp:
contents += "\n%s" % c.description
else:
contents += "\n%s" % comp
return contents
def get_comparable(self, source):
"""extract attributes to sort the sources"""
cur_sys = 1
has_template = 1
has_comment = 1
is_source = 1
revert_numbers = string.maketrans("0123456789", "9876543210")
if source.template:
has_template = 0
desc = source.template.description
if source.template.distribution == self.distro:
cur_sys = 0
else:
desc = "%s %s %s" % (source.uri, source.dist, source.comps)
if source.comment:
has_comment = 0
if source.type.find("src"):
is_source = 0
return (cur_sys, has_template, has_comment, is_source,
desc.translate(revert_numbers))
def get_isv_sources(self):
"""Return a list of sources that are not part of the distribution"""
isv_sources = []
for source in self.sourceslist.list:
if not source.invalid and\
(source not in self.distro.main_sources and\
source not in self.distro.cdrom_sources and\
source not in self.distro.child_sources and\
source not in self.distro.disabled_sources) and\
source not in self.distro.source_code_sources:
isv_sources.append(source)
return isv_sources
def get_cdrom_sources(self):
"""Return the list of CDROM based distro sources"""
return self.distro.cdrom_sources
def get_comp_download_state(self, comp):
"""Return a tuple: the first value describes if a component is enabled
in the Internet repositories. The second value describes if the
first value is inconsistent."""
#FIXME: also return a correct inconsistent value
return (comp.name in self.distro.download_comps, False)
def get_comp_child_state(self, template):
"""Return a tuple: the first value describes if a component is enabled
in one of the child source that matcth the given template.
The second value describes if the first value is inconsistent."""
comps = []
for child in self.distro.child_sources:
if child.template == template:
comps.extend(child.comps)
if len(comps) > 0 and \
len(self.distro.enabled_comps ^ set(comps)) == 0:
# All enabled distro components are also enabled for the child source
return (True, False)
elif len(comps) > 0 and\
len(self.distro.enabled_comps ^ set(comps)) != 0:
# A matching child source does exist but doesn't include all
# enabled distro components
return(False, True)
else:
# There is no corresponding child source at all
return (False, False)
def reload_sourceslist(self):
self.sourceslist.refresh()
self.sourceslist_visible=[]
self.distro.get_sources(self.sourceslist)
def write_config(self):
"""Write the current apt configuration to file"""
# update the adept file as well if it is there
conffiles = [self.rootdir+"/etc/apt/apt.conf.d/10periodic",
self.rootdir+"/etc/apt/apt.conf.d/20auto-upgrades",
self.rootdir+"/etc/apt/apt.conf.d/15adept-periodic-update"]
# check (beforehand) if one exists, if not create one
for f in conffiles:
if os.path.isfile(f):
break
else:
print "No config found, creating one"
open(conffiles[0], "w")
# ensure /etc/cron.daily/apt is executable
ac = "/etc/cron.daily/apt"
if os.path.exists(ac):
perm = os.stat(ac)[stat.ST_MODE]
if not (perm & stat.S_IXUSR):
print "file '%s' not executable, fixing" % ac
os.chmod(ac, 0755)
# now update them
for periodic in conffiles:
# read the old content first
content = []
if os.path.isfile(periodic):
content = open(periodic, "r").readlines()
cnf = apt_pkg.config.subtree("APT::Periodic")
# then write a new file without the updated keys
f = open(periodic, "w")
for line in content:
for key in cnf.list():
if line.find("APT::Periodic::%s" % (key)) >= 0:
break
else:
f.write(line)
# and append the updated keys
for i in cnf.list():
f.write("APT::Periodic::%s \"%s\";\n" % (i, cnf.find_i(i)))
f.close()
def save_sourceslist(self):
"""Backup the existing sources.list files and write the current
configuration"""
self.sourceslist.backup(".save")
self.sourceslist.save()
def _is_line_in_whitelisted_channel(self, srcline):
"""
helper that checks if a given line is in the source list
return the channel name or None if not found
"""
srcentry = SourceEntry(srcline)
if os.path.exists(self.CHANNEL_PATH):
for f in glob.glob("%s/*.list" % self.CHANNEL_PATH):
for line in open(f):
if line.strip().startswith("#"):
continue
if srcentry == SourceEntry(line):
return os.path.splitext(os.path.basename(f))[0]
return None
def check_and_add_key_for_whitelisted_channels(self, srcline):
"""
helper that adds the gpg key of the channel to the apt
keyring *if* the channel is in the whitelist
/usr/share/app-install/channels or it is a public Launchpad PPA.
"""
channel = self._is_line_in_whitelisted_channel(srcline)
if channel:
keyp = "%s/%s.key" % (self.CHANNEL_PATH, channel)
self.add_key(keyp)
# FIXME: abstract this all alway into the ppa.py file
parsed_uri = urlparse(SourceEntry(srcline).uri)
if parsed_uri.netloc == 'ppa.launchpad.net':
worker = AddPPASigningKeyThread(parsed_uri.path, self.options and self.options.keyserver)
worker.start()
return worker
else:
return None
def update_interface(self):
" abstract interface to keep the UI alive "
def expand_http_line(self, line):
"""
short cut - this:
apt-add-repository http://packages.medibuntu.org free non-free
same as
apt-add-repository 'deb http://packages.medibuntu.org/ '$(lsb_release -cs)' free non-free'
"""
if not line.startswith("http"):
return line
repo = line.split()[0]
try:
areas = line.split(" ",1)[1]
except IndexError, e:
areas = "main"
line = "deb %s %s %s" % ( repo, self.distro.codename, areas )
return line
def add_source_from_line(self, line):
"""
Add a source with the given apt line and auto-add
signing key if we have it in the whitelist
"""
(deb_line, file) = expand_ppa_line(line.strip(), self.distro.codename)
deb_line = self.expand_http_line(deb_line)
debsrc_line = 'deb-src' + deb_line[3:]
new_deb_entry = SourceEntry(deb_line, file)
new_debsrc_entry = SourceEntry(debsrc_line, file)
if new_deb_entry.invalid or new_debsrc_entry.invalid:
return False
worker = self.check_and_add_key_for_whitelisted_channels(deb_line)
self.sourceslist.add(new_deb_entry.type,
new_deb_entry.uri,
new_deb_entry.dist,
new_deb_entry.comps,
comment=new_deb_entry.comment,
file=new_deb_entry.file,
architectures=new_deb_entry.architectures)
self.sourceslist.add(new_debsrc_entry.type,
new_debsrc_entry.uri,
new_debsrc_entry.dist,
new_debsrc_entry.comps,
comment=new_debsrc_entry.comment,
file=new_debsrc_entry.file,
architectures=new_debsrc_entry.architectures)
self.set_modified_sourceslist()
if worker:
# wait for GPG key to be downloaded
worker.join(30)
return True
def remove_source(self, source):
"""Remove the given source"""
# first find the source object if we got a string
if isinstance(source, str):
source = self._find_source_from_string(source)
# if its a sources.list.d file and it contains only a single line
# (the line that we just remove), then all references to that
# file are gone and the file is not saved. we work around that
# here
if source.file != apt_pkg.config.find_file("Dir::Etc::sourcelist"):
self.sourceslist.list.append(SourceEntry("", file=source.file))
self.sourceslist.remove(source)
self.set_modified_sourceslist()
def add_key(self, path):
"""Add a gnupg key to the list of trusted software vendors"""
if not isinstance(path, unicode):
path = unicode(path) # allows non-ascii filenames
if not os.path.exists(path):
return False
try:
res = self.apt_key.add(path)
self.KeysModified()
return res
except:
return False
def add_key_from_data(self, keydata):
"Add a gnupg key from a data string (e.g. copy-n-paste)"
tmp = tempfile.NamedTemporaryFile()
tmp.write(keydata)
tmp.flush()
return self.add_key(tmp.name)
def remove_key(self, keyid):
"""Remove a gnupg key from the list of trusted software vendors"""
try:
self.apt_key.rm(keyid)
self.KeysModified()
return True
except:
return False
def update_keys(self):
""" Run apt-key update """
try:
self.apt_key.update()
self.KeysModified()
return True
except:
return False
if __name__ == "__main__":
sp = SoftwareProperties()
print sp.get_release_upgrades_policy()
sp.set_release_upgrades_policy(0)
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