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#!/usr/bin/python
# -*- Coding:utf-8 -*-
#
# Copyright (C) 2012-2013 Red Hat, Inc. All rights reserved.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details. #
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Authors: Michal Minar <miminar@redhat.com>
"""
Abstraction for RPM package for test purposes.
"""
import subprocess
import util
class Package(object):
"""
Element of test package database. It's a container for package
informations.
"""
def __init__(self, name, epoch, ver, rel, arch, repoid,
rpm_path, files=None):
self._name = name
if not epoch or (isinstance(epoch, basestring)
and epoch.lower() == "(none)"):
epoch = "0"
self._epoch = int(epoch)
self._ver = ver
self._rel = rel
self._arch = arch
self._repoid = repoid
self._rpm_path = rpm_path
if files is None:
files = set()
else:
files = set(files)
self._files = files
def __str__(self):
return self.get_nevra()
@property
def name(self):
""" :returns: Package name. """
return self._name
@property
def epoch(self):
""" :returns: Package epoch as an integer. """
return self._epoch
@property
def ver(self):
""" :returns: Version string of package. """
return self._ver
@property
def rel(self):
""" :returns: Release string of package. """
return self._rel
@property
def arch(self):
""" :returns: Architecture string of package. """
return self._arch
@property
def repoid(self):
""" :returns: Repository id of package, where it is available. """
return self._repoid
@property
def nevra(self):
"""
:returns: Nevra string of package with epoch part always present.
"""
return self.get_nevra('ALWAYS')
@property
def evra(self):
"""
:returns: Evra string of package. That's the same as *nevra* without a
name.
"""
attrs = ('epoch', 'ver', 'rel', 'arch')
return util.make_evra(*[getattr(self, '_'+a) for a in attrs])
@property
def rpm_path(self):
"""
:returns: Absolute path to rpm package.
"""
return self._rpm_path
@property
def summary(self):
"""
:returns: Package summary string.
"""
return subprocess.check_output(
['/usr/bin/rpm', '-q', '--qf', '%{SUMMARY}', '-p',
self.rpm_path])
def get_nevra(self, with_epoch='NOT_ZERO'):
"""
:param string with_epoch: Says when the epoch part should appear
in resulting string. There are following possible values:
* NOT_ZERO - epoch shall be present if it's greater than 0
* ALWAYS - epoch will be present
* NEVER - epoch won't be present
:returns: Package nevra string.
:rtype: string
"""
attrs = ('name', 'epoch', 'ver', 'rel', 'arch')
return util.make_nevra(*[getattr(self, '_'+a) for a in attrs],
with_epoch=with_epoch)
def __contains__(self, path):
return path in self._files
def __iter__(self):
for pkg in self._files.__iter__():
yield pkg
def __len__(self):
return len(self._files)
@property
def files(self):
"""
:returns: Set of files and directories installed by this package.
:rtype: set
"""
return self._files.copy()
def to_json(_encoder, pkg):
"""
Converts package object to dictionary which json encoder can handle.
:param _encoder: Instance of json encoder.
:param pkg: Package object to convert.
:type pkg: :py:class:`Package`
:returns: Dictionary with package attributes.
:rtype: dictionary
"""
if not isinstance(pkg, Package):
raise TypeError("not a Package object")
return pkg.__dict__
def from_json(json_object):
"""
Constructs a package object from dictionary loaded from json text.
Inverse function to :py:func:`to_json`.
:param dictionary json_object: Deserialized package as a dictionary.
:returns: Package object.
:rtype: :py:class:`Package`
"""
if isinstance(json_object, dict) and '_arch' in json_object:
kwargs = {k[1:]: v for k, v in json_object.items()}
return Package(**kwargs)
return json_object
def is_pkg_installed(pkg):
"""
Check, whether package is installed.
"""
if not isinstance(pkg, Package):
return subprocess.call(["rpm", "--quiet", "-q", pkg]) == 0
else:
cmd = [ "rpm", "-q", "--qf", "%{EPOCH}:%{NVRA}\n", pkg.get_nevra(
with_epoch='NEVER') ]
try:
out = subprocess.check_output(cmd).splitlines()[0]
epoch, _ = out.split(':')
if not epoch or epoch.lower() == "(none)":
epoch = "0"
return int(epoch) == int(pkg.epoch)
except subprocess.CalledProcessError:
return False
def remove_pkg(pkg, *args):
"""
Remove package with rpm command.
:param pkg: Either an instance of :py:class:`Package` or package name.
If it's a name, any version will be removed. Otherwise the exact
version must be installed for command to be successful.
:param list args: List of parameters for rpm command.
"""
cmd = ["rpm", "--quiet"] + list(args)
if isinstance(pkg, Package):
cmd.extend(["-e", pkg.get_nevra()])
else:
cmd.extend(["-e", pkg])
subprocess.call(cmd)
def install_pkg(pkg):
"""
Install a specific package.
:param pkg: Package object.
:type pkg: :py:class:`Package`
"""
if not isinstance(pkg, Package):
raise TypeError("pkg must be a Package instance")
subprocess.call(["rpm", "--quiet", "-i", pkg.rpm_path])
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