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ansible/library/apt

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#!/usr/bin/python -tt
# (c) 2012, Flowroute LLC
# Written by Matthew Williams <matthew@flowroute.com>
# Based on yum module written by Seth Vidal <skvidal at fedoraproject.org>
#
# This module 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 software 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 software. If not, see <http://www.gnu.org/licenses/>.
#
try:
import json
except ImportError:
import simplejson as json
import os
import sys
import shlex
import subprocess
import syslog
import traceback
APT_PATH = "/usr/bin/apt-get"
APT = "DEBIAN_PRIORITY=critical %s" % APT_PATH
def exit_json(rc=0, **kwargs):
print json.dumps(kwargs)
sys.exit(rc)
def fail_json(**kwargs):
kwargs['failed'] = True
exit_json(rc=1, **kwargs)
try:
import apt, apt_pkg
except ImportError:
fail_json(msg="could not import apt, please install the python-apt package on this host")
def run_apt(command):
try:
cmd = subprocess.Popen(command, shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = cmd.communicate()
except (OSError, IOError), e:
rc = 1
err = str(e)
out = ''
except:
rc = 1
err = traceback.format_exc()
out = ''
else:
rc = cmd.returncode
return rc, out, err
def package_split(pkgspec):
parts = pkgspec.split('=')
if len(parts) > 1:
return parts[0], parts[1]
else:
return parts[0], None
def package_status(pkgname, version, cache):
try:
pkg = cache[pkgname]
except KeyError:
fail_json(msg="No package matching '%s' is available" % pkgname)
if version:
try :
return pkg.is_installed and pkg.installed.version == version, False
except AttributeError:
#assume older version of python-apt is installed
return pkg.isInstalled and pkg.installedVersion == version, False
else:
try :
return pkg.is_installed, pkg.is_upgradable
except AttributeError:
#assume older version of python-apt is installed
return pkg.isInstalled, pkg.isUpgradable
def install(pkgspec, cache, upgrade=False, default_release=None, install_recommends=True):
name, version = package_split(pkgspec)
installed, upgradable = package_status(name, version, cache)
if not installed or (upgrade and upgradable):
cmd = "%s --option Dpkg::Options::=--force-confold -q -y install '%s'" % (APT, pkgspec)
if default_release:
cmd += " -t '%s'" % (default_release,)
if not install_recommends:
cmd += " --no-install-recommends"
rc, out, err = run_apt(cmd)
if rc:
fail_json(msg="'apt-get install %s' failed: %s" % (pkgspec, err))
return True
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else:
return False
def remove(pkgspec, cache, purge=False):
name, version = package_split(pkgspec)
installed, upgradable = package_status(name, version, cache)
if not installed:
return False
else:
purge = '--purge' if purge else ''
cmd = "%s -q -y %s remove '%s'" % (APT, purge, name)
rc, out, err = run_apt(cmd)
if rc:
fail_json(msg="'apt-get remove %s' failed: %s" % (name, err))
return True
# ===========================================
if not os.path.exists(APT_PATH):
fail_json(msg="Cannot find apt-get")
argfile = sys.argv[1]
args = open(argfile, 'r').read()
items = shlex.split(args)
syslog.openlog('ansible-%s' % os.path.basename(__file__))
syslog.syslog(syslog.LOG_NOTICE, 'Invoked with %s' % args)
if not len(items):
fail_json(msg='the module requires arguments -a')
sys.exit(1)
params = {}
for x in items:
(k, v) = x.split("=", 1)
params[k] = v
state = params.get('state', 'installed')
package = params.get('pkg', params.get('package', params.get('name', None)))
update_cache = params.get('update-cache', 'no')
purge = params.get('purge', 'no')
default_release = params.get('default-release', None)
install_recommends = params.get('install-recommends', 'yes')
if state not in ['installed', 'latest', 'removed']:
fail_json(msg='invalid state')
if update_cache not in ['yes', 'no']:
fail_json(msg='invalid value for update_cache (requires yes or no -- default is no')
if purge not in ['yes', 'no']:
fail_json(msg='invalid value for purge (requires yes or no -- default is no)')
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if package is None and update_cache != 'yes':
fail_json(msg='pkg=name and/or update-cache=yes is required')
if install_recommends not in ['yes', 'no']:
fail_json(msg='invalid value for install-recommends (requires yes or no -- default is yes)')
install_recommends = (install_recommends == 'yes')
cache = apt.Cache()
if default_release:
apt_pkg.config['APT::Default-Release'] = default_release
# reopen cache w/ modified config
cache.open()
if update_cache == 'yes':
cache.update()
cache.open()
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if package == None:
exit_json(changed=False)
if package.count('=') > 1:
fail_json(msg='invalid package spec')
if state == 'latest':
if '=' in package:
fail_json(msg='version number inconsistent with state=latest')
changed = install(package, cache, upgrade=True,
default_release=default_release,
install_recommends=install_recommends)
elif state == 'installed':
changed = install(package, cache, default_release=default_release,
install_recommends=install_recommends)
elif state == 'removed':
changed = remove(package, cache, purge == 'yes')
exit_json(changed=changed)