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#!/usr/bin/python
#
# Create or update postfix's alias and lookup tables through ansible
# playbooks.
#
# Copyright 2013 Guilhem Moulin <guilhem@fripost.org>
#
# Licensed under the GNU GPL version 3 or higher.
#
try:
import selinux
HAVE_SELINUX=True
except ImportError:
HAVE_SELINUX=False
# Look up for the file suffix corresponding to 'db'. If 'db' is unset,
# pick the default_detabase_type of the given instance instead.
def file_suffix(instance, db):
if not db:
cmd = [ os.path.join(os.sep, 'usr', 'sbin', 'postconf') ]
if instance:
config = os.path.join(os.sep, 'etc', 'postfix-%s' % instance)
cmd.extend([ '-c', config ])
cmd.extend([ '-h', 'default_database_type' ])
null = open (os.devnull, 'wb')
db = subprocess.check_output(cmd, stderr=null).rstrip()
null.closed
# See postmap(1) and postalias(1)
suffixes = { 'btree': 'db', 'cdb': 'cdb', 'hash': 'db' }
return suffixes[db]
# Compile the given (alias/lookup) table
def compile(cmd, instance, db, src):
cmd = [ os.path.join(os.sep, 'usr', 'sbin', cmd) ]
if instance:
config = os.path.join(os.sep, 'etc', 'postfix-%s' % instance)
cmd.extend([ '-c', config ])
if db:
src = "%s:%s" % (db,src)
cmd.append(src)
subprocess.check_output(cmd, stderr=subprocess.STDOUT)
def main():
module = AnsibleModule(
argument_spec = dict(
src = dict( required=True ),
db = dict( choices=['btree','cdb','hash'] ),
cmd = dict( choices=['postmap','postalias'], default='postmap' ),
instance = dict( required=False )
),
add_file_common_args=True,
supports_check_mode=True
)
params = module.params
src = params['src']
cmd = params['cmd']
if os.path.isabs(src):
src = src
else:
module.fail_json(msg="absolute paths are required")
if not os.path.exists(src):
module.fail_json(src=src, msg="no such file")
try:
dst = "%s.%s" % (src, file_suffix(params['instance'], params['db']))
params['dest'] = dst
file_args = module.load_file_common_arguments(params)
changed = False
msg = None
if not os.path.exists(dst) or os.path.getmtime(dst) <= os.path.getmtime(src):
changed = True
if not module.check_mode:
msg = compile( params['cmd'], params['instance'], params['db'], src)
except subprocess.CalledProcessError, e:
module.fail_json(rv=e.returncode, msg=e.output.rstrip())
changed = module.set_file_attributes_if_different(file_args, changed)
module.exit_json(changed=changed, msg=msg)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()
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