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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 = "/usr/bin/apt-get"
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):
debug(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 = ''
if out is None:
out = ''
if err is None:
err = ''
else:
rc = cmd.returncode
debug(err)
return rc, out, err
def get_cache():
# TODO: Only update the cache if it's old.
cache = apt.Cache()
cache.update()
cache.open(None)
return cache
def package_installed(pkgspec):
cache = get_cache()
try:
pkg = cache[pkgspec]
except:
fail_json(msg="No package matching '%s' is available" % pkgspec)
return bool(pkg.is_installed)
def install(pkgspec):
installed = package_installed(pkgspec)
debug("installed: %d" % installed)
if installed:
return False
else:
cmd = "%s -q -y install '%s'" % (APT, pkgspec)
rc, out, err = run_apt(cmd)
# TODO: Ensure the package was really installed.
return True
def remove(pkgspec):
installed = package_installed(pkgspec)
debug("installed: %d" % installed)
if not installed:
return False
else:
cmd = "%s -q -y remove '%s'" % (APT, pkgspec)
rc, out, err = run_apt(cmd)
# TODO: Ensure the package was really removed.
return True
def update(args):
# TODO: generic update routine
pass
def remove_only(pkgspec):
# TODO: remove this pkg and only this pkg - fail if it will require more to remove
pass
# ===========================================
if not os.path.exists(APT):
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)
if state not in ['installed', 'removed']:
fail_json(msg='invalid state')
if package is None:
fail_json(msg='pkg is required')
if state == 'installed':
changed = install(package)
elif state == 'removed':
changed = remove(package)
exit_json(changed=changed)