from __future__ import print_function

import sys
try:
# >= 3.0
from configparser import NoOptionError, NoSectionError
if sys.version >= '3.2':
from configparser import ConfigParser as SafeConfigParser
else:
from configparser import SafeConfigParser
except ImportError:
# < 3.0
from ConfigParser import SafeConfigParser, NoOptionError, NoSectionError
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
if os.path.exists(name+"."+from_release):
name = name+"."+from_release
maincfg = os.path.join(datadir,name)
# 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)
items = [x.strip() for x in open(p)]
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))