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# vim: set fileencoding=utf-8 :
#
# (C) 2010,2014 Guido Günther <agx@sigxcpu.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 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/>.
#
import re
import string
import subprocess
class PkgError(Exception):
pass
class Pkg(object):
"""
A package in a distribution
@var services: list of services provided by package
@var shared_objects: list of shared objects shipped in this package
@cvar type: package type (e.g. RPM or Debian)
@cvar _so_regex: regex that matches shared objects in the list returned by
_get_contents
@cvar _list_contents: command to list contents of a package, will be passed
to subprocess. "$pkg_name" will be replaced by the package
name.
"""
type = None
services = None
_so_regex = re.compile(r'(?P<so>/.*\.so(\.[^/]*)$)')
_list_contents = None
def __init__(self, name):
self.name = name
self._services = None
self._shared_objects = None
self._contents = None
def __repr__(self):
return "<%s Pkg object name:'%s'>" % (self.type, self.name)
def _get_contents(self):
"""List of files in the package"""
if self._contents:
return self._contents
else:
cmd = [ string.Template(arg).substitute(arg, pkg_name=self.name)
for arg in self._list_contents ]
list_contents = subprocess.Popen(cmd,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
output = list_contents.communicate()[0]
if list_contents.returncode:
raise PkgError("Failed to list package contents for '%s'" % self.name)
self._contents = output.split('\n')
return self._contents
@property
def shared_objects(self):
if self._shared_objects is not None:
return self._shared_objects
self._shared_objects = []
contents = self._get_contents()
for line in contents:
m = self._so_regex.match(line)
if m:
self._shared_objects.append(m.group('so'))
return self._shared_objects
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