/usr/lib/python2.7/dist-packages/piupartslib/conf.py is in piuparts-common 0.64ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright 2005 Lars Wirzenius (liw@iki.fi)
# Copyright © 2012-2013 Andreas Beckmann (anbe@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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#
# NOTA BENE: This module MUST NOT use the logging module, since it can and
# will be used before logging is set up (because logging can be configured
# in a configuration file, that's why).
#
import ConfigParser
import UserDict
import subprocess
import collections
import re
import distro_info
from functools import reduce
class MissingSection(Exception):
def __init__(self, filename, section):
self.args = "Section %s not defined in configuration file %s" % \
(section, filename),
class MissingMandatorySetting(Exception):
def __init__(self, filename, key):
self.args = "Value for %s not set in configuration file %s" % \
(key, filename),
class Config(UserDict.UserDict):
def __init__(self, section, defaults, mandatory=[], defaults_section=None):
UserDict.UserDict.__init__(self)
self._section = section
self._defaults_section = defaults_section
for key, value in defaults.iteritems():
self[key] = value
self._mandatory = mandatory
def read(self, filename):
cp = ConfigParser.ConfigParser()
cp.read(filename)
if not cp.has_section(self._section):
raise MissingSection(filename, self._section)
for key in self.keys():
if cp.has_option(self._section, key):
self[key] = cp.get(self._section, key)
elif self._defaults_section and cp.has_option(self._defaults_section, key):
self[key] = cp.get(self._defaults_section, key)
elif key in self._mandatory:
raise MissingMandatorySetting(filename, key)
def get_mirror(self, distro=None):
if self["mirror"] is not None:
return self["mirror"]
return "http://httpredir.debian.org/debian"
def get_distros(self):
if self["upgrade-test-distros"] is not None:
return self["upgrade-test-distros"].split()
return []
def get_distro(self):
if self["distro"]:
return self["distro"]
distros = self.get_distros()
if distros:
return distros[-1]
return None
def get_start_distro(self):
distros = self.get_distros()
if distros:
return distros[0]
return self["distro"]
def get_final_distro(self):
distros = self.get_distros()
if distros:
return distros[-1]
return self["distro"]
def _get_distmap(self):
debdist = distro_info.DebianDistroInfo()
# start with e.g. "sid" -> "unstable"
distmap = collections.defaultdict(lambda: "unknown", [
(debdist.old(), "oldstable"),
(debdist.devel(), "unstable"),
(debdist.stable(), "stable"),
(debdist.testing(), "testing"),
("experimental", "experimental"),
("rc", "experimental"),
])
# add mappings for e.g. "oldstable" -> "oldstable"
distmap.update(dict([(val, val) for key, val in distmap.iteritems()]))
# map e.g. "Debian6" -> "oldstable" where debdist.old(result="fullname")
# currently returns 'Debian 6.0 "Squeeze"'
dkey = lambda x: "Debian" + re.split('[ \.]', x(result="fullname"))[1]
dfuncs = [debdist.old, debdist.stable, debdist.testing]
distmap.update(dict([(dkey(x), distmap[x()]) for x in dfuncs]))
return distmap
def _map_distro(self, distro):
distro_root = re.split("[\-\.]", distro)[0]
distmap = self._get_distmap()
return distmap[distro_root]
def get_std_distro(self, distrolist=[]):
if not distrolist:
distrolist = [self.get_distro()] + self.get_distros()
mappedlist = [self._map_distro(x) for x in distrolist]
return reduce(lambda x, y: y if y != "unknown" else x, mappedlist)
def get_area(self):
if self["area"] is not None:
return self["area"]
return "main"
def get_arch(self):
if not self["arch"]:
# Try to figure it out ourselves, using dpkg
p = subprocess.Popen(["dpkg", "--print-architecture"],
stdout=subprocess.PIPE)
self["arch"] = p.stdout.read().rstrip()
return self["arch"]
class DistroConfig(UserDict.UserDict):
def __init__(self, filename, mirror):
UserDict.UserDict.__init__(self)
self._mirror = mirror
self._defaults = {
"uri": None,
"distribution": None,
"components": None,
"target-release": None,
"depends": None,
"candidates": None,
}
cp = ConfigParser.SafeConfigParser()
cp.read(filename)
for section in cp.sections():
self[section] = dict(self._defaults)
for key in self._defaults.keys():
if cp.has_option(section, key):
self[section][key] = cp.get(section, key)
def get(self, section, key=None):
if not section in self.keys():
self[section] = dict(self._defaults, distribution=section)
if not key is None:
return self[section][key]
return self[section]
def _is_virtual(self, distro):
uri = self.get(distro, "uri")
return uri is not None and uri == "None"
def get_mirror(self, distro):
if self._is_virtual(distro):
distro = self._expand_depends(distro)[0]
return self.get(distro, "uri") or self._mirror
def get_distribution(self, distro):
if self._is_virtual(distro):
distro = self._expand_depends(distro)[0]
return self.get(distro, "distribution") or distro
def get_candidates(self, distro):
return (self.get(distro, "candidates") or "").split() or [distro]
def _get_packages_url(self, distro, area, arch):
return "%s/dists/%s/%s/binary-%s/Packages" % (
self.get_mirror(distro),
self.get_distribution(distro),
area, arch)
def get_packages_urls(self, distro, area, arch):
return [self._get_packages_url(d, area, arch)
for d in self.get_candidates(distro)]
def _get_sources_url(self, distro, area):
return "%s/dists/%s/%s/source/Sources" % (
self.get_mirror(distro),
self.get_distribution(distro),
area)
def get_sources_urls(self, distro, area):
return [self._get_sources_url(d, area)
for d in self.get_candidates(distro)]
def get_target_flags(self, distro):
tr = self.get(distro, "target-release")
if tr:
return ["-t", tr]
return []
def _expand_depends(self, distro, include_virtual=False):
todo = [distro]
done = []
seen = []
while todo:
curr = todo[0]
todo = todo[1:]
if not curr in seen:
seen.append(curr)
todo = (self.get(curr, "depends") or "").split() + [curr] + todo
elif not curr in done:
if include_virtual or not self._is_virtual(curr):
done.append(curr)
assert(len(done) > 0)
return done
def get_deb_lines(self, distro, components):
lines = []
for d in self._expand_depends(distro):
for c in components:
if self[d]["components"] is None or c in self[d]["components"].split():
lines.append("deb %s %s %s" % (
self.get_mirror(d),
self.get_distribution(d),
c))
return lines
def get_basetgz(self, distro, arch):
# look for the first base distribution
for d in self._expand_depends(distro):
if self.get(d, "depends"):
next # skip partial distro
return "%s_%s.tar.gz" % (self.get_distribution(d), arch)
return None
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