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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 apt
import shlex
import subprocess
import traceback
APT_PATH = "/usr/bin/apt-get"
APT = "DEBIAN_PRIORITY=critical %s" % APT_PATH
def debug(msg):
# ansible ignores stderr, so it's safe to use for debug
print >>sys.stderr, msg
#pass
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)
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_status(pkgspec, cache):
try:
pkg = cache[pkgspec]
except:
fail_json(msg="No package matching '%s' is available" % pkgspec)
return (pkg.is_installed, pkg.is_upgradable)
def install(pkgspec, cache, upgrade=False):
(installed, upgradable) = package_status(pkgspec, cache)
if installed or not upgrade or not upgradable:
return False
else:
cmd = "%s -q -y install '%s'" % (APT, pkgspec)
rc, out, err = run_apt(cmd)
if rc:
json_fail(msg="'apt-get install %s' failed: %s" % (pkgspec, err))
return True
def remove(pkgspec, cache, purge=False):
(installed, upgradable) = package_status(pkgspec, cache)
if not installed:
return False
else:
purge = '--purge' if purge else ''
cmd = "%s -q -y %s remove '%s'" % (APT, purge, pkgspec)
rc, out, err = run_apt(cmd)
if rc:
json_fail(msg="'apt-get remove %s' failed: %s" % (pkgspec, 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)
if not len(items):
fail_json(msg='the module requires arguments -a')
sys.exit(1)
params = {}
for x in items:
(k, v) = x.split("=")
params[k] = v
state = params.get('state','installed')
package = params.get('pkg', None)
update_cache = params.get('update-cache', 'no')
purge = params.get('purge', 'no')
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)')
if package is None and update-cache != 'yes':
fail_json(msg='pkg=name and/or update-cache=yes is required')
cache = apt.Cache()
if update_cache == 'yes':
cache.update()
cache.open()
if state == 'latest':
changed = install(package, cache, upgrade=True)
if state == 'installed':
changed = install(package, cache)
elif state == 'removed':
changed = remove(package, cache, purge == 'yes')
exit_json(changed=changed)