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# -*- coding: utf-8 -*-
# updater.py
# Copyright (C) 2014, 2015 LEAP
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
"""
Updater check and download loop.
"""
import os
import shutil
import platform
import time
import threading
import ConfigParser
import tuf.client.updater
from leap.bitmask.logs.utils import get_logger
from leap.common.events import emit, catalog
logger = get_logger()
"""
Supported platforms.
Maps platform names from `platform.system() + "-" + platform.machine()` to the
platform names we use in the repos.
"""
bundles_per_platform = {
"Linux-i386": "linux-i386",
"Linux-i686": "linux-i386",
"Linux-x86_64": "linux-x86_64",
}
CONFIG_PATH = "launcher.conf"
GENERAL_SECTION = "General"
DELAY_KEY = "updater_delay"
class Updater(threading.Thread):
def __init__(self):
"""
Initialize the list of mirrors, paths and other TUF dependencies from
the config file
"""
config = ConfigParser.ConfigParser()
config.read(CONFIG_PATH)
if config.has_section(GENERAL_SECTION) and \
config.has_option(GENERAL_SECTION, DELAY_KEY):
self.delay = config.getint(GENERAL_SECTION, DELAY_KEY)
else:
self.delay = 60
self._load_mirrors(config)
if not self.mirrors:
logger.error("No updater mirrors found (missing or not well "
"formed launcher.conf)")
self.bundle_path = os.getcwd()
self.source_path = self.bundle_path
self.dest_path = os.path.join(self.bundle_path, 'tmp')
self.update_path = os.path.join(self.bundle_path, 'updates')
tuf.conf.ssl_certificates = "./lib/leap/common/cacert.pem"
threading.Thread.__init__(self)
self.daemon = True
def run(self):
"""
Check for updates
"""
if not self.mirrors:
return
while True:
try:
tuf.conf.repository_directory = os.path.join(self.bundle_path,
'repo')
updater = tuf.client.updater.Updater('leap-updater',
self.mirrors)
updater.refresh()
targets = updater.all_targets()
updated_targets = updater.updated_targets(targets,
self.source_path)
if updated_targets:
logger.info("There is updates needed. Start downloading "
"updates.")
for target in updated_targets:
updater.download_target(target, self.dest_path)
self._set_permissions(target)
if os.path.isdir(self.dest_path):
if os.path.isdir(self.update_path):
shutil.rmtree(self.update_path)
shutil.move(self.dest_path, self.update_path)
filepath = sorted([f['filepath'] for f in updated_targets])
emit(catalog.UPDATER_NEW_UPDATES,
", ".join(filepath))
logger.info("Updates ready: %s" % (filepath,))
return
except NotImplemented as e:
logger.error("NotImplemented: %s" % (e,))
return
except Exception as e:
logger.error("An unexpected error has occurred while "
"updating: %s" % (e,))
finally:
time.sleep(self.delay)
def _load_mirrors(self, config):
"""
Retrieve the mirrors from config and place them in self.mirrors
:param config: parsed configuration file
:type config: ConfigParser
"""
self.mirrors = {}
for section in config.sections():
if section[:6] != 'Mirror':
continue
url_prefix = config.get(section, 'url_prefix')
metadata_path = self._repo_path() + '/metadata'
targets_path = self._repo_path() + '/targets'
self.mirrors[section[7:]] = {'url_prefix': url_prefix,
'metadata_path': metadata_path,
'targets_path': targets_path,
'confined_target_dirs': ['']}
def _set_permissions(self, target):
"""
Walk over all the targets and set the rigt permissions on each file.
The permisions are stored in the custom field 'file_permissions' of the
TUF's targets.json
:param target: the already parsed target json
:type target: tuf.formats.TARGETFILES_SCHEMA
"""
file_permissions_str = target["fileinfo"]["custom"]["file_permissions"]
file_permissions = int(file_permissions_str, 8)
filepath = target['filepath']
if filepath[0] == '/':
filepath = filepath[1:]
file_path = os.path.join(self.dest_path, filepath)
os.chmod(file_path, file_permissions)
def _repo_path(self):
"""
Find the remote repo path deneding on the platform.
:return: the path to add to the remote repo url for the specific
platform.
:rtype: str
:raises NotImplemented: When the system where bitmask is running is not
supported by the updater.
"""
system = platform.system() + "-" + platform.machine()
if system not in bundles_per_platform:
raise NotImplementedError("Platform %s not supported" % (system,))
return bundles_per_platform[system]
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