mirror of
https://github.com/ansible-collections/community.general.git
synced 2025-04-26 20:31:27 -07:00
8c08d03989
* Add tests for check_mode at play and task level These test inheritance of check_mode from the various levels (command line, as a play attribute and as a task attribute) so they will be useful for checking that the change to fieldattribute inheritance with defaults works * Add a sentinel object The Sentinel object can be used in place of None when we need to mark an entry as being special (usually used to mark something as not having been set) * Start of using a Sentinel object instead of None. * Handle edge cases around use of Sentinel * _get_parent_attribute needs to deal in Sentinel not None * No need to special case any_errors_fatal in task.py any longer * Handle more edge cases around Sentinel * Use Sentinel instead of None in TaskInclude * Update code to clarify the vars we are copying are class attrs * Add changelog fragment * Use a default of Sentinel for delegate_to, this also allows 'delegate_to: ~' now to unset inherited delegate_to * Explain Sentinel stripping in _extend_value * Fix ModuleArgsParser tests to compare with Sentinel * Fixes for tasks inside of roles inheriting from play * Remove incorrect note. ci_complete * Remove commented code
614 lines
25 KiB
Python
614 lines
25 KiB
Python
# Copyright: (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
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# Copyright: (c) 2017, Ansible Project
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# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import itertools
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import operator
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from copy import copy as shallowcopy
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from functools import partial
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from jinja2.exceptions import UndefinedError
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from ansible import constants as C
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from ansible.module_utils.six import iteritems, string_types, with_metaclass
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from ansible.module_utils.parsing.convert_bool import boolean
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from ansible.errors import AnsibleParserError, AnsibleUndefinedVariable, AnsibleAssertionError
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from ansible.module_utils._text import to_text, to_native
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from ansible.playbook.attribute import Attribute, FieldAttribute
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from ansible.parsing.dataloader import DataLoader
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from ansible.utils.display import Display
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from ansible.utils.sentinel import Sentinel
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from ansible.utils.vars import combine_vars, isidentifier, get_unique_id
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display = Display()
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def _generic_g(prop_name, self):
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try:
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value = self._attributes[prop_name]
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except KeyError:
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raise AttributeError("'%s' object has no attribute '%s'" % (self.__class__.__name__, prop_name))
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if value is Sentinel:
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value = self._attr_defaults[prop_name]
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return value
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def _generic_g_method(prop_name, self):
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try:
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if self._squashed:
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return self._attributes[prop_name]
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method = "_get_attr_%s" % prop_name
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return getattr(self, method)()
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except KeyError:
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raise AttributeError("'%s' object has no attribute '%s'" % (self.__class__.__name__, prop_name))
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def _generic_g_parent(prop_name, self):
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try:
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if self._squashed or self._finalized:
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value = self._attributes[prop_name]
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else:
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try:
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value = self._get_parent_attribute(prop_name)
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except AttributeError:
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value = self._attributes[prop_name]
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except KeyError:
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raise AttributeError("'%s' object has no attribute '%s'" % (self.__class__.__name__, prop_name))
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if value is Sentinel:
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value = self._attr_defaults[prop_name]
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return value
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def _generic_s(prop_name, self, value):
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self._attributes[prop_name] = value
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def _generic_d(prop_name, self):
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del self._attributes[prop_name]
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class BaseMeta(type):
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"""
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Metaclass for the Base object, which is used to construct the class
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attributes based on the FieldAttributes available.
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"""
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def __new__(cls, name, parents, dct):
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def _create_attrs(src_dict, dst_dict):
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'''
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Helper method which creates the attributes based on those in the
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source dictionary of attributes. This also populates the other
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attributes used to keep track of these attributes and via the
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getter/setter/deleter methods.
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'''
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keys = list(src_dict.keys())
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for attr_name in keys:
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value = src_dict[attr_name]
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if isinstance(value, Attribute):
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if attr_name.startswith('_'):
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attr_name = attr_name[1:]
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# here we selectively assign the getter based on a few
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# things, such as whether we have a _get_attr_<name>
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# method, or if the attribute is marked as not inheriting
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# its value from a parent object
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method = "_get_attr_%s" % attr_name
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if method in src_dict or method in dst_dict:
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getter = partial(_generic_g_method, attr_name)
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elif ('_get_parent_attribute' in dst_dict or '_get_parent_attribute' in src_dict) and value.inherit:
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getter = partial(_generic_g_parent, attr_name)
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else:
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getter = partial(_generic_g, attr_name)
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setter = partial(_generic_s, attr_name)
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deleter = partial(_generic_d, attr_name)
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dst_dict[attr_name] = property(getter, setter, deleter)
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dst_dict['_valid_attrs'][attr_name] = value
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dst_dict['_attributes'][attr_name] = Sentinel
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dst_dict['_attr_defaults'][attr_name] = value.default
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if value.alias is not None:
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dst_dict[value.alias] = property(getter, setter, deleter)
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dst_dict['_valid_attrs'][value.alias] = value
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dst_dict['_alias_attrs'][value.alias] = attr_name
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def _process_parents(parents, dst_dict):
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'''
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Helper method which creates attributes from all parent objects
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recursively on through grandparent objects
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'''
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for parent in parents:
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if hasattr(parent, '__dict__'):
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_create_attrs(parent.__dict__, dst_dict)
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new_dst_dict = parent.__dict__.copy()
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new_dst_dict.update(dst_dict)
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_process_parents(parent.__bases__, new_dst_dict)
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# create some additional class attributes
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dct['_attributes'] = {}
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dct['_attr_defaults'] = {}
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dct['_valid_attrs'] = {}
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dct['_alias_attrs'] = {}
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# now create the attributes based on the FieldAttributes
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# available, including from parent (and grandparent) objects
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_create_attrs(dct, dct)
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_process_parents(parents, dct)
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return super(BaseMeta, cls).__new__(cls, name, parents, dct)
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class FieldAttributeBase(with_metaclass(BaseMeta, object)):
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def __init__(self):
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# initialize the data loader and variable manager, which will be provided
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# later when the object is actually loaded
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self._loader = None
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self._variable_manager = None
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# other internal params
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self._validated = False
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self._squashed = False
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self._finalized = False
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# every object gets a random uuid:
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self._uuid = get_unique_id()
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# we create a copy of the attributes here due to the fact that
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# it was initialized as a class param in the meta class, so we
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# need a unique object here (all members contained within are
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# unique already).
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self._attributes = self.__class__._attributes.copy()
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self._attr_defaults = self.__class__._attr_defaults.copy()
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for key, value in self._attr_defaults.items():
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if callable(value):
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self._attr_defaults[key] = value()
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# and init vars, avoid using defaults in field declaration as it lives across plays
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self.vars = dict()
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def dump_me(self, depth=0):
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''' this is never called from production code, it is here to be used when debugging as a 'complex print' '''
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if depth == 0:
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display.debug("DUMPING OBJECT ------------------------------------------------------")
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display.debug("%s- %s (%s, id=%s)" % (" " * depth, self.__class__.__name__, self, id(self)))
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if hasattr(self, '_parent') and self._parent:
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self._parent.dump_me(depth + 2)
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dep_chain = self._parent.get_dep_chain()
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if dep_chain:
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for dep in dep_chain:
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dep.dump_me(depth + 2)
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if hasattr(self, '_play') and self._play:
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self._play.dump_me(depth + 2)
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def preprocess_data(self, ds):
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''' infrequently used method to do some pre-processing of legacy terms '''
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for base_class in self.__class__.mro():
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method = getattr(self, "_preprocess_data_%s" % base_class.__name__.lower(), None)
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if method:
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return method(ds)
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return ds
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def load_data(self, ds, variable_manager=None, loader=None):
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''' walk the input datastructure and assign any values '''
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if ds is None:
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raise AnsibleAssertionError('ds (%s) should not be None but it is.' % ds)
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# cache the datastructure internally
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setattr(self, '_ds', ds)
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# the variable manager class is used to manage and merge variables
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# down to a single dictionary for reference in templating, etc.
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self._variable_manager = variable_manager
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# the data loader class is used to parse data from strings and files
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if loader is not None:
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self._loader = loader
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else:
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self._loader = DataLoader()
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# call the preprocess_data() function to massage the data into
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# something we can more easily parse, and then call the validation
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# function on it to ensure there are no incorrect key values
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ds = self.preprocess_data(ds)
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self._validate_attributes(ds)
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# Walk all attributes in the class. We sort them based on their priority
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# so that certain fields can be loaded before others, if they are dependent.
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for name, attr in sorted(iteritems(self._valid_attrs), key=operator.itemgetter(1)):
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# copy the value over unless a _load_field method is defined
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target_name = name
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if name in self._alias_attrs:
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target_name = self._alias_attrs[name]
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if name in ds:
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method = getattr(self, '_load_%s' % name, None)
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if method:
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self._attributes[target_name] = method(name, ds[name])
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else:
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self._attributes[target_name] = ds[name]
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# run early, non-critical validation
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self.validate()
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# return the constructed object
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return self
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def get_ds(self):
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try:
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return getattr(self, '_ds')
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except AttributeError:
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return None
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def get_loader(self):
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return self._loader
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def get_variable_manager(self):
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return self._variable_manager
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def _validate_debugger(self, attr, name, value):
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valid_values = frozenset(('always', 'on_failed', 'on_unreachable', 'on_skipped', 'never'))
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if value and isinstance(value, string_types) and value not in valid_values:
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raise AnsibleParserError("'%s' is not a valid value for debugger. Must be one of %s" % (value, ', '.join(valid_values)), obj=self.get_ds())
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return value
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def _validate_attributes(self, ds):
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'''
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Ensures that there are no keys in the datastructure which do
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not map to attributes for this object.
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'''
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valid_attrs = frozenset(self._valid_attrs.keys())
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for key in ds:
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if key not in valid_attrs:
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raise AnsibleParserError("'%s' is not a valid attribute for a %s" % (key, self.__class__.__name__), obj=ds)
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def validate(self, all_vars=None):
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''' validation that is done at parse time, not load time '''
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all_vars = {} if all_vars is None else all_vars
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if not self._validated:
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# walk all fields in the object
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for (name, attribute) in iteritems(self._valid_attrs):
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if name in self._alias_attrs:
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name = self._alias_attrs[name]
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# run validator only if present
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method = getattr(self, '_validate_%s' % name, None)
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if method:
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method(attribute, name, getattr(self, name))
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else:
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# and make sure the attribute is of the type it should be
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value = self._attributes[name]
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if value is not None:
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if attribute.isa == 'string' and isinstance(value, (list, dict)):
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raise AnsibleParserError(
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"The field '%s' is supposed to be a string type,"
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" however the incoming data structure is a %s" % (name, type(value)), obj=self.get_ds()
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)
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self._validated = True
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def squash(self):
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'''
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Evaluates all attributes and sets them to the evaluated version,
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so that all future accesses of attributes do not need to evaluate
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parent attributes.
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'''
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if not self._squashed:
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for name in self._valid_attrs.keys():
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self._attributes[name] = getattr(self, name)
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self._squashed = True
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def copy(self):
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'''
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Create a copy of this object and return it.
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'''
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new_me = self.__class__()
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for name in self._valid_attrs.keys():
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if name in self._alias_attrs:
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continue
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new_me._attributes[name] = shallowcopy(self._attributes[name])
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new_me._attr_defaults[name] = shallowcopy(self._attr_defaults[name])
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new_me._loader = self._loader
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new_me._variable_manager = self._variable_manager
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new_me._validated = self._validated
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new_me._finalized = self._finalized
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new_me._uuid = self._uuid
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# if the ds value was set on the object, copy it to the new copy too
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if hasattr(self, '_ds'):
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new_me._ds = self._ds
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return new_me
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def post_validate(self, templar):
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'''
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we can't tell that everything is of the right type until we have
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all the variables. Run basic types (from isa) as well as
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any _post_validate_<foo> functions.
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'''
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# save the omit value for later checking
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omit_value = templar._available_variables.get('omit')
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for (name, attribute) in iteritems(self._valid_attrs):
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if getattr(self, name) is None:
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if not attribute.required:
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continue
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else:
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raise AnsibleParserError("the field '%s' is required but was not set" % name)
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elif not attribute.always_post_validate and self.__class__.__name__ not in ('Task', 'Handler', 'PlayContext'):
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# Intermediate objects like Play() won't have their fields validated by
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# default, as their values are often inherited by other objects and validated
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# later, so we don't want them to fail out early
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continue
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try:
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# Run the post-validator if present. These methods are responsible for
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# using the given templar to template the values, if required.
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method = getattr(self, '_post_validate_%s' % name, None)
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if method:
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value = method(attribute, getattr(self, name), templar)
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elif attribute.isa == 'class':
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value = getattr(self, name)
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else:
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# if the attribute contains a variable, template it now
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value = templar.template(getattr(self, name))
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# if this evaluated to the omit value, set the value back to
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# the default specified in the FieldAttribute and move on
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if omit_value is not None and value == omit_value:
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if callable(attribute.default):
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setattr(self, name, attribute.default())
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else:
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setattr(self, name, attribute.default)
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continue
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# and make sure the attribute is of the type it should be
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if value is not None:
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if attribute.isa == 'string':
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value = to_text(value)
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elif attribute.isa == 'int':
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value = int(value)
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elif attribute.isa == 'float':
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value = float(value)
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elif attribute.isa == 'bool':
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value = boolean(value, strict=False)
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elif attribute.isa == 'percent':
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# special value, which may be an integer or float
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# with an optional '%' at the end
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if isinstance(value, string_types) and '%' in value:
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value = value.replace('%', '')
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value = float(value)
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elif attribute.isa == 'list':
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if value is None:
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value = []
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elif not isinstance(value, list):
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value = [value]
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if attribute.listof is not None:
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for item in value:
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if not isinstance(item, attribute.listof):
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raise AnsibleParserError("the field '%s' should be a list of %s, "
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"but the item '%s' is a %s" % (name, attribute.listof, item, type(item)), obj=self.get_ds())
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elif attribute.required and attribute.listof == string_types:
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if item is None or item.strip() == "":
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raise AnsibleParserError("the field '%s' is required, and cannot have empty values" % (name,), obj=self.get_ds())
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elif attribute.isa == 'set':
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if value is None:
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value = set()
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elif not isinstance(value, (list, set)):
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if isinstance(value, string_types):
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value = value.split(',')
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else:
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# Making a list like this handles strings of
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# text and bytes properly
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value = [value]
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if not isinstance(value, set):
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value = set(value)
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elif attribute.isa == 'dict':
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if value is None:
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value = dict()
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elif not isinstance(value, dict):
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raise TypeError("%s is not a dictionary" % value)
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elif attribute.isa == 'class':
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if not isinstance(value, attribute.class_type):
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raise TypeError("%s is not a valid %s (got a %s instead)" % (name, attribute.class_type, type(value)))
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value.post_validate(templar=templar)
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# and assign the massaged value back to the attribute field
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setattr(self, name, value)
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except (TypeError, ValueError) as e:
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value = getattr(self, name)
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raise AnsibleParserError("the field '%s' has an invalid value (%s), and could not be converted to an %s."
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"The error was: %s" % (name, value, attribute.isa, e), obj=self.get_ds(), orig_exc=e)
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except (AnsibleUndefinedVariable, UndefinedError) as e:
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if templar._fail_on_undefined_errors and name != 'name':
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if name == 'args':
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msg = "The task includes an option with an undefined variable. The error was: %s" % (to_native(e))
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else:
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msg = "The field '%s' has an invalid value, which includes an undefined variable. The error was: %s" % (name, to_native(e))
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raise AnsibleParserError(msg, obj=self.get_ds(), orig_exc=e)
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self._finalized = True
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def _load_vars(self, attr, ds):
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'''
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Vars in a play can be specified either as a dictionary directly, or
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as a list of dictionaries. If the later, this method will turn the
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list into a single dictionary.
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'''
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def _validate_variable_keys(ds):
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for key in ds:
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if not isidentifier(key):
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raise TypeError("'%s' is not a valid variable name" % key)
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try:
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if isinstance(ds, dict):
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_validate_variable_keys(ds)
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return combine_vars(self.vars, ds)
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elif isinstance(ds, list):
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all_vars = self.vars
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for item in ds:
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if not isinstance(item, dict):
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raise ValueError
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_validate_variable_keys(item)
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all_vars = combine_vars(all_vars, item)
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return all_vars
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elif ds is None:
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return {}
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else:
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raise ValueError
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|
except ValueError as e:
|
|
raise AnsibleParserError("Vars in a %s must be specified as a dictionary, or a list of dictionaries" % self.__class__.__name__,
|
|
obj=ds, orig_exc=e)
|
|
except TypeError as e:
|
|
raise AnsibleParserError("Invalid variable name in vars specified for %s: %s" % (self.__class__.__name__, e), obj=ds, orig_exc=e)
|
|
|
|
def _extend_value(self, value, new_value, prepend=False):
|
|
'''
|
|
Will extend the value given with new_value (and will turn both
|
|
into lists if they are not so already). The values are run through
|
|
a set to remove duplicate values.
|
|
'''
|
|
|
|
if not isinstance(value, list):
|
|
value = [value]
|
|
if not isinstance(new_value, list):
|
|
new_value = [new_value]
|
|
|
|
# Due to where _extend_value may run for some attributes
|
|
# it is possible to end up with Sentinel in the list of values
|
|
# ensure we strip them
|
|
value[:] = [v for v in value if v is not Sentinel]
|
|
new_value[:] = [v for v in new_value if v is not Sentinel]
|
|
|
|
if prepend:
|
|
combined = new_value + value
|
|
else:
|
|
combined = value + new_value
|
|
|
|
return [i for i, _ in itertools.groupby(combined) if i is not None]
|
|
|
|
def dump_attrs(self):
|
|
'''
|
|
Dumps all attributes to a dictionary
|
|
'''
|
|
attrs = dict()
|
|
for (name, attribute) in iteritems(self._valid_attrs):
|
|
attr = getattr(self, name)
|
|
if attribute.isa == 'class' and attr is not None and hasattr(attr, 'serialize'):
|
|
attrs[name] = attr.serialize()
|
|
else:
|
|
attrs[name] = attr
|
|
return attrs
|
|
|
|
def from_attrs(self, attrs):
|
|
'''
|
|
Loads attributes from a dictionary
|
|
'''
|
|
for (attr, value) in iteritems(attrs):
|
|
if attr in self._valid_attrs:
|
|
attribute = self._valid_attrs[attr]
|
|
if attribute.isa == 'class' and isinstance(value, dict):
|
|
obj = attribute.class_type()
|
|
obj.deserialize(value)
|
|
setattr(self, attr, obj)
|
|
else:
|
|
setattr(self, attr, value)
|
|
|
|
def serialize(self):
|
|
'''
|
|
Serializes the object derived from the base object into
|
|
a dictionary of values. This only serializes the field
|
|
attributes for the object, so this may need to be overridden
|
|
for any classes which wish to add additional items not stored
|
|
as field attributes.
|
|
'''
|
|
|
|
repr = self.dump_attrs()
|
|
|
|
# serialize the uuid field
|
|
repr['uuid'] = self._uuid
|
|
repr['finalized'] = self._finalized
|
|
repr['squashed'] = self._squashed
|
|
|
|
return repr
|
|
|
|
def deserialize(self, data):
|
|
'''
|
|
Given a dictionary of values, load up the field attributes for
|
|
this object. As with serialize(), if there are any non-field
|
|
attribute data members, this method will need to be overridden
|
|
and extended.
|
|
'''
|
|
|
|
if not isinstance(data, dict):
|
|
raise AnsibleAssertionError('data (%s) should be a dict but is a %s' % (data, type(data)))
|
|
|
|
for (name, attribute) in iteritems(self._valid_attrs):
|
|
if name in data:
|
|
setattr(self, name, data[name])
|
|
else:
|
|
if callable(attribute.default):
|
|
setattr(self, name, attribute.default())
|
|
else:
|
|
setattr(self, name, attribute.default)
|
|
|
|
# restore the UUID field
|
|
setattr(self, '_uuid', data.get('uuid'))
|
|
self._finalized = data.get('finalized', False)
|
|
self._squashed = data.get('squashed', False)
|
|
|
|
|
|
class Base(FieldAttributeBase):
|
|
|
|
_name = FieldAttribute(isa='string', default='', always_post_validate=True, inherit=False)
|
|
|
|
# connection/transport
|
|
_connection = FieldAttribute(isa='string')
|
|
_port = FieldAttribute(isa='int')
|
|
_remote_user = FieldAttribute(isa='string')
|
|
|
|
# variables
|
|
_vars = FieldAttribute(isa='dict', priority=100, inherit=False)
|
|
|
|
# module default params
|
|
_module_defaults = FieldAttribute(isa='list', extend=True, prepend=True)
|
|
|
|
# flags and misc. settings
|
|
_environment = FieldAttribute(isa='list', extend=True, prepend=True)
|
|
_no_log = FieldAttribute(isa='bool')
|
|
_run_once = FieldAttribute(isa='bool')
|
|
_ignore_errors = FieldAttribute(isa='bool')
|
|
_ignore_unreachable = FieldAttribute(isa='bool')
|
|
_check_mode = FieldAttribute(isa='bool')
|
|
_diff = FieldAttribute(isa='bool')
|
|
_any_errors_fatal = FieldAttribute(isa='bool', default=C.ANY_ERRORS_FATAL)
|
|
|
|
# explicitly invoke a debugger on tasks
|
|
_debugger = FieldAttribute(isa='string')
|
|
|
|
# param names which have been deprecated/removed
|
|
DEPRECATED_ATTRIBUTES = [
|
|
'sudo', 'sudo_user', 'sudo_pass', 'sudo_exe', 'sudo_flags',
|
|
'su', 'su_user', 'su_pass', 'su_exe', 'su_flags',
|
|
]
|