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/>.
#
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import traceback
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# added to stave off future warnings about apt api
import warnings;
warnings.filterwarnings('ignore', "apt API not stable yet", FutureWarning)
# APT related constants
APT_PATH = "/usr/bin/apt-get"
APT = "DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical %s" % APT_PATH
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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
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def package_split(pkgspec):
parts = pkgspec.split('=')
if len(parts) > 1:
return parts[0], parts[1]
else:
return parts[0], None
def package_status(m, pkgname, version, cache):
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try:
pkg = cache[pkgname]
except KeyError:
m.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
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def install(m, pkgspec, cache, upgrade=False, default_release=None, install_recommends=True, force=False):
name, version = package_split(pkgspec)
installed, upgradable = package_status(m, name, version, cache)
if not installed or (upgrade and upgradable):
if force:
force_yes = '--force-yes'
else:
force_yes = ''
cmd = "%s --option Dpkg::Options::=--force-confold -q -y %s install '%s'" % (APT, force_yes, pkgspec)
if default_release:
cmd += " -t '%s'" % (default_release,)
if not install_recommends:
cmd += " --no-install-recommends"
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rc, out, err = run_apt(cmd)
if rc:
m.fail_json(msg="'apt-get install %s' failed: %s" % (pkgspec, err))
else:
m.exit_json(changed=True)
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else:
m.exit_json(changed=False)
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def remove(m, pkgspec, cache, purge=False):
name, version = package_split(pkgspec)
installed, upgradable = package_status(m, name, version, cache)
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if not installed:
m.exit_json(changed=False)
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else:
purge = '--purge' if purge else ''
cmd = "%s -q -y %s remove '%s'" % (APT, purge, name)
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rc, out, err = run_apt(cmd)
if rc:
m.fail_json(msg="'apt-get remove %s' failed: %s" % (name, err))
m.exit_json(changed=True)
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def main():
module = AnsibleModule(
argument_spec = dict(
state = dict(default='installed', choices=['installed', 'latest', 'removed']),
update_cache = dict(default='no', choices=['yes', 'no']),
purge = dict(default='no', choices=['yes', 'no']),
package = dict(default=None, aliases=['pkg', 'name']),
default_release = dict(default=None, aliases=['default-release']),
install_recommends = dict(default='yes', aliases=['install-recommends'], choices=['yes', 'no']),
force = dict(default='no', choices=['yes', 'no'])
)
)
try:
import apt, apt_pkg
except:
module.fail_json("Could not import python modules: apt, apt_pkg. Please install python-apt package.")
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if not os.path.exists(APT_PATH):
module.fail_json(msg="Cannot find apt-get")
p = module.params
if p['package'] is None and p['update_cache'] != 'yes':
module.fail_json(msg='pkg=name and/or update-cache=yes is required')
install_recommends = (p['install_recommends'] == 'yes')
cache = apt.Cache()
if p['default_release']:
apt_pkg.config['APT::Default-Release'] = p['default_release']
# reopen cache w/ modified config
cache.open(progress=None)
if p['update_cache'] == 'yes':
cache.update()
cache.open(progress=None)
if p['package'] == None:
module.exit_json(changed=False)
if p['force'] == 'yes':
force_yes = True
else:
force_yes = False
if p['package'].count('=') > 1:
module.fail_json(msg='invalid package spec')
if p['state'] == 'latest':
if '=' in p['package']:
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module.fail_json(msg='version number inconsistent with state=latest')
install(module, p['package'], cache, upgrade=True,
default_release=p['default_release'],
install_recommends=install_recommends,
force=force_yes)
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elif p['state'] == 'installed':
install(module, p['package'], cache, default_release=p['default_release'],
install_recommends=install_recommends,force=force_yes)
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elif p['state'] == 'removed':
remove(module, p['package'], cache, purge == 'yes')
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# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
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main()
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