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# Copyright: (c) 2018, Ansible Project # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt) # Make coding more python3-ish from __future__ import (absolute_import, division, print_function) __metaclass__ = type """ Hold command line arguments for use in other modules """ from abc import ABCMeta from collections.abc import Container, Mapping, Sequence, Set from ansible.module_utils.common.collections import ImmutableDict from ansible.module_utils.six import add_metaclass, binary_type, text_type from ansible.utils.singleton import Singleton def _make_immutable(obj): """Recursively convert a container and objects inside of it into immutable data types""" if isinstance(obj, (text_type, binary_type)): # Strings first because they are also sequences return obj elif isinstance(obj, Mapping): temp_dict = {} for key, value in obj.items(): if isinstance(value, Container): temp_dict[key] = _make_immutable(value) else: temp_dict[key] = value return ImmutableDict(temp_dict) elif isinstance(obj, Set): temp_set = set() for value in obj: if isinstance(value, Container): temp_set.add(_make_immutable(value)) else: temp_set.add(value) return frozenset(temp_set) elif isinstance(obj, Sequence): temp_sequence = [] for value in obj: if isinstance(value, Container): temp_sequence.append(_make_immutable(value)) else: temp_sequence.append(value) return tuple(temp_sequence) return obj class _ABCSingleton(Singleton, ABCMeta): """ Combine ABCMeta based classes with Singleton based classes Combine Singleton and ABCMeta so we have a metaclass that unambiguously knows which can override the other. Useful for making new types of containers which are also Singletons. """ pass class CLIArgs(ImmutableDict): """ Hold a parsed copy of cli arguments We have both this non-Singleton version and the Singleton, GlobalCLIArgs, version to leave us room to implement a Context object in the future. Whereas there should only be one set of args in a global context, individual Context objects might want to pretend that they have different command line switches to trigger different behaviour when they run. So if we support Contexts in the future, they would use CLIArgs instead of GlobalCLIArgs to store their version of command line flags. """ def __init__(self, mapping): toplevel = {} for key, value in mapping.items(): toplevel[key] = _make_immutable(value) super(CLIArgs, self).__init__(toplevel) @classmethod def from_options(cls, options): return cls(vars(options)) @add_metaclass(_ABCSingleton) class GlobalCLIArgs(CLIArgs): """ Globally hold a parsed copy of cli arguments. Only one of these exist per program as it is for global context """ pass