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# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible 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.
#
# Ansible 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 Ansible. If not, see <http://www.gnu.org/licenses/>.
#############################################
# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
from abc import ABCMeta, abstractmethod
from six import with_metaclass
class InventoryParser(with_metaclass(ABCMeta, object)):
'''Abstract Base Class for retrieving inventory information
Any InventoryParser functions by taking an inven_source. The caller then
calls the parser() method. Once parser is called, the caller can access
InventoryParser.hosts for a mapping of Host objects and
InventoryParser.Groups for a mapping of Group objects.
'''
def __init__(self, inven_source):
'''
InventoryParser contructors take a source of inventory information
that they will parse the host and group information from.
'''
self.inven_source = inven_source
self.reset_parser()
@abstractmethod
def reset_parser(self):
'''
InventoryParsers generally cache their data once parser() is
called. This method initializes any parser state before calling parser
again.
'''
self.hosts = dict()
self.groups = dict()
self.parsed = False
def _merge(self, target, addition):
'''
This method is provided to InventoryParsers to merge host or group
dicts since it may take several passes to get all of the data
Example usage:
self.hosts = self.from_ini(filename)
new_hosts = self.from_script(scriptname)
self._merge(self.hosts, new_hosts)
'''
for i in addition:
if i in target:
target[i].merge(addition[i])
else:
target[i] = addition[i]
@abstractmethod
def parse(self, refresh=False):
if refresh:
self.reset_parser()
if self.parsed:
return self.parsed
# Parse self.inven_sources here
pass
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