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community.general/lib/ansible/plugins/__init__.py
Matt Martz 9773a1f289
Add a Singleton metaclass, use it with Display (#48935)
* Add a Singleton class, use it with Display

* update six import

* Move remaining failes to display singleton

* Fix rebase issues

* Singleton improvements

* Add code-smell for 'from __main__ import display'. ci_complete

* s/self/cls/g

* Add docs for no-main-display

* Address linting issues

* Add changelog fragment. ci_complete

* Implement reentrant lock for class instantiation in Singleton

* Add Display singleton porting guide
2018-11-20 17:06:51 -06:00

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3 KiB
Python

# (c) 2012, Daniel Hokka Zakrisson <daniel@hozac.com>
# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com> and others
# (c) 2017, Toshio Kuratomi <tkuratomi@ansible.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
from ansible import constants as C
from ansible.module_utils.six import with_metaclass, string_types
from ansible.utils.display import Display
display = Display()
# Global so that all instances of a PluginLoader will share the caches
MODULE_CACHE = {}
PATH_CACHE = {}
PLUGIN_PATH_CACHE = {}
def get_plugin_class(obj):
if isinstance(obj, string_types):
return obj.lower().replace('module', '')
else:
return obj.__class__.__name__.lower().replace('module', '')
class AnsiblePlugin(with_metaclass(ABCMeta, object)):
# allow extra passthrough parameters
allow_extras = False
def __init__(self):
self._options = {}
def get_option(self, option, hostvars=None):
if option not in self._options:
option_value = C.config.get_config_value(option, plugin_type=get_plugin_class(self), plugin_name=self._load_name, variables=hostvars)
self.set_option(option, option_value)
return self._options.get(option)
def set_option(self, option, value):
self._options[option] = value
def set_options(self, task_keys=None, var_options=None, direct=None):
'''
Sets the _options attribute with the configuration/keyword information for this plugin
:arg task_keys: Dict with playbook keywords that affect this option
:arg var_options: Dict with either 'connection variables'
:arg direct: Dict with 'direct assignment'
'''
self._options = C.config.get_plugin_options(get_plugin_class(self), self._load_name, keys=task_keys, variables=var_options, direct=direct)
# allow extras/wildcards from vars that are not directly consumed in configuration
# this is needed to support things like winrm that can have extended protocol options we don't direclty handle
if self.allow_extras and var_options and '_extras' in var_options:
self.set_option('_extras', var_options['_extras'])
def _check_required(self):
# FIXME: standarize required check based on config
pass