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# DistUpgradeConfigParser.py
#
# Copyright (c) 2004-2014 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
from configparser import NoOptionError, NoSectionError
from configparser import ConfigParser as SafeConfigParser
import subprocess
import os.path
import logging
import glob
CONFIG_OVERRIDE_DIR = "/etc/update-manager/release-upgrades.d"
class DistUpgradeConfig(SafeConfigParser):
def __init__(self, datadir, name="DistUpgrade.cfg",
override_dir=None, defaults_dir=None):
SafeConfigParser.__init__(self)
# we support a config overwrite, if DistUpgrade.cfg.dapper exists
# and the user runs dapper, that one will be used
from_release = subprocess.Popen(
["lsb_release", "-c", "-s"], stdout=subprocess.PIPE,
universal_newlines=True).communicate()[0].strip()
self.datadir = datadir
maincfg = os.path.join(datadir, name)
if os.path.exists(maincfg + "." + from_release):
maincfg += "." + from_release
# defaults are read first
self.config_files = []
if defaults_dir:
for cfg in glob.glob(defaults_dir + "/*.cfg"):
self.config_files.append(cfg)
# our config file
self.config_files += [maincfg]
# overrides are read later
if override_dir is None:
override_dir = CONFIG_OVERRIDE_DIR
if override_dir is not None:
for cfg in glob.glob(override_dir + "/*.cfg"):
self.config_files.append(cfg)
self.read(self.config_files)
def getWithDefault(self, section, option, default):
try:
if type(default) == bool:
return self.getboolean(section, option)
elif type(default) == float:
return self.getfloat(section, option)
elif type(default) == int:
return self.getint(section, option)
return self.get(section, option)
except (NoSectionError, NoOptionError):
return default
def getlist(self, section, option):
try:
tmp = self.get(section, option)
except (NoSectionError, NoOptionError):
return []
items = [x.strip() for x in tmp.split(",")]
return items
def getListFromFile(self, section, option):
try:
filename = self.get(section, option)
except NoOptionError:
return []
p = os.path.join(self.datadir, filename)
if not os.path.exists(p):
logging.error("getListFromFile: no '%s' found" % p)
with open(p) as f:
items = [x.strip() for x in f]
return [s for s in items if not s.startswith("#") and not s == ""]
if __name__ == "__main__":
c = DistUpgradeConfig(".")
print(c.getlist("Distro", "MetaPkgs"))
print(c.getlist("Distro", "ForcedPurges"))
print(c.getListFromFile("Sources", "ValidMirrors"))
print(c.getWithDefault("Distro", "EnableApport", True))
print(c.set("Distro", "Foo", "False"))
print(c.getWithDefault("Distro", "Foo", True))
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