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# software-properties PPA support
#
# Copyright (c) 2004-2009 Canonical Ltd.
#
# Author: Michael Vogt <mvo@debian.org>
#
# 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_pkg
import json
import re
import subprocess
from threading import Thread
import pycurl
DEFAULT_KEYSERVER = "hkp://keyserver.ubuntu.com:80/"
# maintained until 2015
LAUNCHPAD_PPA_API = 'https://launchpad.net/api/1.0/~%s/+archive/%s'
# None means use pycurl default
LAUNCHPAD_PPA_CERT = None
def encode(s):
return re.sub("[^a-zA-Z0-9_-]","_", s)
def expand_ppa_line(abrev, distro_codename):
""" Convert an abbreviated ppa name of the form 'ppa:$name' to a
proper sources.list line of the form 'deb ...' """
# leave non-ppa: lines unchanged
if not abrev.startswith("ppa:"):
return (abrev, None)
# FIXME: add support for dependency PPAs too (once we can get them
# via some sort of API, see LP #385129)
abrev = abrev.split(":")[1]
ppa_owner = abrev.split("/")[0]
try:
ppa_name = abrev.split("/")[1]
except IndexError, e:
ppa_name = "ppa"
sourceslistd = apt_pkg.config.find_dir("Dir::Etc::sourceparts")
line = "deb http://ppa.launchpad.net/%s/%s/ubuntu %s main" % (
ppa_owner, ppa_name, distro_codename)
filename = "%s/%s-%s-%s.list" % (
sourceslistd, encode(ppa_owner), encode(ppa_name), distro_codename)
return (line, filename)
class CurlCallback:
def __init__(self):
self.contents = ''
def body_callback(self, buf):
self.contents = self.contents + buf
def get_ppa_info_from_lp(owner_name, ppa_name):
lp_url = LAUNCHPAD_PPA_API % (owner_name, ppa_name)
# we ask for a JSON structure from lp_page, we could use
# simplejson, but the format is simple enough for the regexp
callback = CurlCallback()
curl = pycurl.Curl()
curl.setopt(pycurl.SSL_VERIFYPEER, 1)
curl.setopt(pycurl.SSL_VERIFYHOST, 2)
curl.setopt(pycurl.WRITEFUNCTION, callback.body_callback)
# only useful for testing
if LAUNCHPAD_PPA_CERT:
curl.setopt(pycurl.CAINFO, LAUNCHPAD_PPA_CERT)
curl.setopt(pycurl.URL, str(lp_url))
curl.setopt(pycurl.HTTPHEADER, ["Accept: application/json"])
curl.perform()
curl.close()
lp_page = callback.contents
return json.loads(lp_page)
class AddPPASigningKeyThread(Thread):
" thread class for adding the signing key in the background "
def __init__(self, ppa_path, keyserver=None):
Thread.__init__(self)
self.ppa_path = ppa_path
self.keyserver = (keyserver if keyserver is not None
else DEFAULT_KEYSERVER)
def run(self):
self.add_ppa_signing_key(self.ppa_path)
def add_ppa_signing_key(self, ppa_path):
"""Query and add the corresponding PPA signing key.
The signing key fingerprint is obtained from the Launchpad PPA page,
via a secure channel, so it can be trusted.
"""
owner_name, ppa_name, distro = ppa_path[1:].split('/')
try:
ppa_info = get_ppa_info_from_lp(owner_name, ppa_name)
except pycurl.error as e:
print "Error reading %s: %s" % (lp_url, e[1])
return False
try:
signing_key_fingerprint = ppa_info["signing_key_fingerprint"]
except IndexError as e:
print "Error: can't find signing_key_fingerprint at %s" % lp_url
return False
res = subprocess.call(
["apt-key", "adv",
"--keyserver", self.keyserver,
"--recv", signing_key_fingerprint])
return (res == 0)
if __name__ == "__main__":
import sys
owner_name, ppa_name = sys.argv[1].split(":")[1].split("/")
print get_ppa_info_from_lp(owner_name, ppa_name)
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