mirror of
https://github.com/thegeeklab/ansible-later.git
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504 lines
19 KiB
Python
504 lines
19 KiB
Python
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# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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# Make coding more python3-ish
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import os
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from ansible import constants as C
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from ansible.errors import AnsibleError, AnsibleParserError, AnsibleUndefinedVariable, AnsibleAssertionError
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from ansible.module_utils.six import iteritems, string_types
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from ansible.module_utils._text import to_native
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from ansible.parsing.mod_args import ModuleArgsParser
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from ansible.parsing.yaml.objects import AnsibleBaseYAMLObject, AnsibleMapping
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from ansible.plugins.loader import lookup_loader
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from ansible.playbook.attribute import FieldAttribute
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from ansible.playbook.base import Base
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from ansible.playbook.become import Become
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from ansible.playbook.block import Block
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from ansible.playbook.conditional import Conditional
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from ansible.playbook.loop_control import LoopControl
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from ansible.playbook.role import Role
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from ansible.playbook.taggable import Taggable
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try:
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from __main__ import display
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except ImportError:
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from ansible.utils.display import Display
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display = Display()
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__all__ = ['Task']
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class Task(Base, Conditional, Taggable, Become):
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"""
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A task is a language feature that represents a call to a module, with given arguments and other parameters.
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A handler is a subclass of a task.
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Usage:
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Task.load(datastructure) -> Task
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Task.something(...)
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"""
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# =================================================================================
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# ATTRIBUTES
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# load_<attribute_name> and
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# validate_<attribute_name>
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# will be used if defined
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# might be possible to define others
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_args = FieldAttribute(isa='dict', default=dict)
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_action = FieldAttribute(isa='string')
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_async_val = FieldAttribute(isa='int', default=0, alias='async')
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_changed_when = FieldAttribute(isa='list', default=list)
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_delay = FieldAttribute(isa='int', default=5)
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_delegate_to = FieldAttribute(isa='string')
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_delegate_facts = FieldAttribute(isa='bool')
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_failed_when = FieldAttribute(isa='list', default=list)
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_loop = FieldAttribute()
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_loop_control = FieldAttribute(isa='class', class_type=LoopControl, inherit=False)
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_notify = FieldAttribute(isa='list')
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_poll = FieldAttribute(isa='int', default=10)
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_register = FieldAttribute(isa='string')
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_retries = FieldAttribute(isa='int', default=3)
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_until = FieldAttribute(isa='list', default=list)
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# deprecated, used to be loop and loop_args but loop has been repurposed
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_loop_with = FieldAttribute(isa='string', private=True, inherit=False)
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def __init__(self, block=None, role=None, task_include=None):
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''' constructors a task, without the Task.load classmethod, it will be pretty blank '''
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self._role = role
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self._parent = None
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if task_include:
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self._parent = task_include
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else:
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self._parent = block
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super(Task, self).__init__()
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def get_path(self):
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''' return the absolute path of the task with its line number '''
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path = ""
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if hasattr(self, '_ds') and hasattr(self._ds, '_data_source') and hasattr(self._ds, '_line_number'):
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path = "%s:%s" % (self._ds._data_source, self._ds._line_number)
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elif hasattr(self._parent._play, '_ds') and hasattr(self._parent._play._ds, '_data_source') and hasattr(self._parent._play._ds, '_line_number'):
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path = "%s:%s" % (self._parent._play._ds._data_source, self._parent._play._ds._line_number)
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return path
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def get_name(self):
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''' return the name of the task '''
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if self._role and self.name and ("%s : " % self._role._role_name) not in self.name:
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return "%s : %s" % (self._role.get_name(), self.name)
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elif self.name:
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return self.name
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else:
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if self._role:
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return "%s : %s" % (self._role.get_name(), self.action)
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else:
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return "%s" % (self.action,)
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def _merge_kv(self, ds):
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if ds is None:
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return ""
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elif isinstance(ds, string_types):
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return ds
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elif isinstance(ds, dict):
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buf = ""
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for (k, v) in iteritems(ds):
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if k.startswith('_'):
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continue
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buf = buf + "%s=%s " % (k, v)
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buf = buf.strip()
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return buf
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@staticmethod
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def load(data, block=None, role=None, task_include=None, variable_manager=None, loader=None):
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t = Task(block=block, role=role, task_include=task_include)
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return t.load_data(data, variable_manager=variable_manager, loader=loader)
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def __repr__(self):
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''' returns a human readable representation of the task '''
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if self.get_name() == 'meta':
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return "TASK: meta (%s)" % self.args['_raw_params']
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else:
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return "TASK: %s" % self.get_name()
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def _preprocess_with_loop(self, ds, new_ds, k, v):
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''' take a lookup plugin name and store it correctly '''
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loop_name = k.replace("with_", "")
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if new_ds.get('loop') is not None or new_ds.get('loop_with') is not None:
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raise AnsibleError("duplicate loop in task: %s" % loop_name, obj=ds)
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if v is None:
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raise AnsibleError("you must specify a value when using %s" % k, obj=ds)
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new_ds['loop_with'] = loop_name
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new_ds['loop'] = v
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# FIXME: reenable afte 2.5
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# display.deprecated("with_ type loops are being phased out, use the 'loop' keyword instead", version="2.10")
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def preprocess_data(self, ds):
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'''
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tasks are especially complex arguments so need pre-processing.
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keep it short.
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'''
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if not isinstance(ds, dict):
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raise AnsibleAssertionError('ds (%s) should be a dict but was a %s' % (ds, type(ds)))
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# the new, cleaned datastructure, which will have legacy
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# items reduced to a standard structure suitable for the
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# attributes of the task class
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new_ds = AnsibleMapping()
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if isinstance(ds, AnsibleBaseYAMLObject):
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new_ds.ansible_pos = ds.ansible_pos
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# use the args parsing class to determine the action, args,
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# and the delegate_to value from the various possible forms
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# supported as legacy
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args_parser = ModuleArgsParser(task_ds=ds)
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try:
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(action, args, delegate_to) = args_parser.parse()
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except AnsibleParserError as e:
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# if the raises exception was created with obj=ds args, then it includes the detail
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# so we dont need to add it so we can just re raise.
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if e._obj:
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raise
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# But if it wasn't, we can add the yaml object now to get more detail
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raise AnsibleParserError(to_native(e), obj=ds, orig_exc=e)
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# the command/shell/script modules used to support the `cmd` arg,
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# which corresponds to what we now call _raw_params, so move that
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# value over to _raw_params (assuming it is empty)
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if action in ('command', 'shell', 'script'):
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if 'cmd' in args:
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if args.get('_raw_params', '') != '':
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raise AnsibleError("The 'cmd' argument cannot be used when other raw parameters are specified."
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" Please put everything in one or the other place.", obj=ds)
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args['_raw_params'] = args.pop('cmd')
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new_ds['action'] = action
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new_ds['args'] = args
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new_ds['delegate_to'] = delegate_to
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# we handle any 'vars' specified in the ds here, as we may
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# be adding things to them below (special handling for includes).
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# When that deprecated feature is removed, this can be too.
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if 'vars' in ds:
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# _load_vars is defined in Base, and is used to load a dictionary
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# or list of dictionaries in a standard way
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new_ds['vars'] = self._load_vars(None, ds.get('vars'))
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else:
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new_ds['vars'] = dict()
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for (k, v) in iteritems(ds):
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if k in ('action', 'local_action', 'args', 'delegate_to') or k == action or k == 'shell':
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# we don't want to re-assign these values, which were determined by the ModuleArgsParser() above
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continue
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elif k.startswith('with_') and k.replace("with_", "") in lookup_loader:
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# transform into loop property
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self._preprocess_with_loop(ds, new_ds, k, v)
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else:
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# pre-2.0 syntax allowed variables for include statements at the top level of the task,
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# so we move those into the 'vars' dictionary here, and show a deprecation message
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# as we will remove this at some point in the future.
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if action in ('include',) and k not in self._valid_attrs and k not in self.DEPRECATED_ATTRIBUTES:
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display.deprecated("Specifying include variables at the top-level of the task is deprecated."
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" Please see:\nhttps://docs.ansible.com/ansible/playbooks_roles.html#task-include-files-and-encouraging-reuse\n\n"
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" for currently supported syntax regarding included files and variables", version="2.12")
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new_ds['vars'][k] = v
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elif C.INVALID_TASK_ATTRIBUTE_FAILED or k in self._valid_attrs:
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new_ds[k] = v
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else:
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display.warning("Ignoring invalid attribute: %s" % k)
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return super(Task, self).preprocess_data(new_ds)
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def _load_loop_control(self, attr, ds):
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if not isinstance(ds, dict):
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raise AnsibleParserError(
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"the `loop_control` value must be specified as a dictionary and cannot "
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"be a variable itself (though it can contain variables)",
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obj=ds,
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)
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return LoopControl.load(data=ds, variable_manager=self._variable_manager, loader=self._loader)
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def _validate_attributes(self, ds):
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try:
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super(Task, self)._validate_attributes(ds)
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except AnsibleParserError as e:
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e.message += '\nThis error can be suppressed as a warning using the "invalid_task_attribute_failed" configuration'
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raise e
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def post_validate(self, templar):
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'''
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Override of base class post_validate, to also do final validation on
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the block and task include (if any) to which this task belongs.
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'''
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if self._parent:
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self._parent.post_validate(templar)
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super(Task, self).post_validate(templar)
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def _post_validate_loop(self, attr, value, templar):
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'''
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Override post validation for the loop field, which is templated
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specially in the TaskExecutor class when evaluating loops.
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'''
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return value
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def _post_validate_environment(self, attr, value, templar):
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'''
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Override post validation of vars on the play, as we don't want to
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template these too early.
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'''
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env = {}
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if value is not None:
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def _parse_env_kv(k, v):
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try:
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env[k] = templar.template(v, convert_bare=False)
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except AnsibleUndefinedVariable as e:
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error = to_native(e)
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if self.action in ('setup', 'gather_facts') and 'ansible_facts.env' in error or 'ansible_env' in error:
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# ignore as fact gathering is required for 'env' facts
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return
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raise
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if isinstance(value, list):
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for env_item in value:
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if isinstance(env_item, dict):
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for k in env_item:
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_parse_env_kv(k, env_item[k])
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else:
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isdict = templar.template(env_item, convert_bare=False)
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if isinstance(isdict, dict):
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env.update(isdict)
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else:
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display.warning("could not parse environment value, skipping: %s" % value)
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elif isinstance(value, dict):
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# should not really happen
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env = dict()
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for env_item in value:
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_parse_env_kv(env_item, value[env_item])
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else:
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# at this point it should be a simple string, also should not happen
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env = templar.template(value, convert_bare=False)
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return env
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def _post_validate_changed_when(self, attr, value, templar):
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'''
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changed_when is evaluated after the execution of the task is complete,
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and should not be templated during the regular post_validate step.
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'''
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return value
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def _post_validate_failed_when(self, attr, value, templar):
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'''
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failed_when is evaluated after the execution of the task is complete,
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and should not be templated during the regular post_validate step.
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'''
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return value
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def _post_validate_until(self, attr, value, templar):
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'''
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until is evaluated after the execution of the task is complete,
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and should not be templated during the regular post_validate step.
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'''
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return value
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def get_vars(self):
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all_vars = dict()
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if self._parent:
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all_vars.update(self._parent.get_vars())
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all_vars.update(self.vars)
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if 'tags' in all_vars:
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del all_vars['tags']
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if 'when' in all_vars:
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del all_vars['when']
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return all_vars
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def get_include_params(self):
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all_vars = dict()
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if self._parent:
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||
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|
all_vars.update(self._parent.get_include_params())
|
||
|
|
if self.action in ('include', 'include_tasks', 'include_role'):
|
||
|
|
all_vars.update(self.vars)
|
||
|
|
return all_vars
|
||
|
|
|
||
|
|
def copy(self, exclude_parent=False, exclude_tasks=False):
|
||
|
|
new_me = super(Task, self).copy()
|
||
|
|
|
||
|
|
new_me._parent = None
|
||
|
|
if self._parent and not exclude_parent:
|
||
|
|
new_me._parent = self._parent.copy(exclude_tasks=exclude_tasks)
|
||
|
|
|
||
|
|
new_me._role = None
|
||
|
|
if self._role:
|
||
|
|
new_me._role = self._role
|
||
|
|
|
||
|
|
return new_me
|
||
|
|
|
||
|
|
def serialize(self):
|
||
|
|
data = super(Task, self).serialize()
|
||
|
|
|
||
|
|
if not self._squashed and not self._finalized:
|
||
|
|
if self._parent:
|
||
|
|
data['parent'] = self._parent.serialize()
|
||
|
|
data['parent_type'] = self._parent.__class__.__name__
|
||
|
|
|
||
|
|
if self._role:
|
||
|
|
data['role'] = self._role.serialize()
|
||
|
|
|
||
|
|
return data
|
||
|
|
|
||
|
|
def deserialize(self, data):
|
||
|
|
|
||
|
|
# import is here to avoid import loops
|
||
|
|
from ansible.playbook.task_include import TaskInclude
|
||
|
|
from ansible.playbook.handler_task_include import HandlerTaskInclude
|
||
|
|
|
||
|
|
parent_data = data.get('parent', None)
|
||
|
|
if parent_data:
|
||
|
|
parent_type = data.get('parent_type')
|
||
|
|
if parent_type == 'Block':
|
||
|
|
p = Block()
|
||
|
|
elif parent_type == 'TaskInclude':
|
||
|
|
p = TaskInclude()
|
||
|
|
elif parent_type == 'HandlerTaskInclude':
|
||
|
|
p = HandlerTaskInclude()
|
||
|
|
p.deserialize(parent_data)
|
||
|
|
self._parent = p
|
||
|
|
del data['parent']
|
||
|
|
|
||
|
|
role_data = data.get('role')
|
||
|
|
if role_data:
|
||
|
|
r = Role()
|
||
|
|
r.deserialize(role_data)
|
||
|
|
self._role = r
|
||
|
|
del data['role']
|
||
|
|
|
||
|
|
super(Task, self).deserialize(data)
|
||
|
|
|
||
|
|
def set_loader(self, loader):
|
||
|
|
'''
|
||
|
|
Sets the loader on this object and recursively on parent, child objects.
|
||
|
|
This is used primarily after the Task has been serialized/deserialized, which
|
||
|
|
does not preserve the loader.
|
||
|
|
'''
|
||
|
|
|
||
|
|
self._loader = loader
|
||
|
|
|
||
|
|
if self._parent:
|
||
|
|
self._parent.set_loader(loader)
|
||
|
|
|
||
|
|
def _get_parent_attribute(self, attr, extend=False, prepend=False):
|
||
|
|
'''
|
||
|
|
Generic logic to get the attribute or parent attribute for a task value.
|
||
|
|
'''
|
||
|
|
|
||
|
|
extend = self._valid_attrs[attr].extend
|
||
|
|
prepend = self._valid_attrs[attr].prepend
|
||
|
|
try:
|
||
|
|
value = self._attributes[attr]
|
||
|
|
# If parent is static, we can grab attrs from the parent
|
||
|
|
# otherwise, defer to the grandparent
|
||
|
|
if getattr(self._parent, 'statically_loaded', True):
|
||
|
|
_parent = self._parent
|
||
|
|
else:
|
||
|
|
_parent = self._parent._parent
|
||
|
|
|
||
|
|
if _parent and (value is None or extend):
|
||
|
|
if getattr(_parent, 'statically_loaded', True):
|
||
|
|
# vars are always inheritable, other attributes might not be for the partent but still should be for other ancestors
|
||
|
|
if attr != 'vars' and hasattr(_parent, '_get_parent_attribute'):
|
||
|
|
parent_value = _parent._get_parent_attribute(attr)
|
||
|
|
else:
|
||
|
|
parent_value = _parent._attributes.get(attr, None)
|
||
|
|
|
||
|
|
if extend:
|
||
|
|
value = self._extend_value(value, parent_value, prepend)
|
||
|
|
else:
|
||
|
|
value = parent_value
|
||
|
|
except KeyError:
|
||
|
|
pass
|
||
|
|
|
||
|
|
return value
|
||
|
|
|
||
|
|
def _get_attr_any_errors_fatal(self):
|
||
|
|
value = self._attributes['any_errors_fatal']
|
||
|
|
if value is None:
|
||
|
|
value = self._get_parent_attribute('any_errors_fatal')
|
||
|
|
if value is None:
|
||
|
|
value = C.ANY_ERRORS_FATAL
|
||
|
|
return value
|
||
|
|
|
||
|
|
def get_dep_chain(self):
|
||
|
|
if self._parent:
|
||
|
|
return self._parent.get_dep_chain()
|
||
|
|
else:
|
||
|
|
return None
|
||
|
|
|
||
|
|
def get_search_path(self):
|
||
|
|
'''
|
||
|
|
Return the list of paths you should search for files, in order.
|
||
|
|
This follows role/playbook dependency chain.
|
||
|
|
'''
|
||
|
|
path_stack = []
|
||
|
|
|
||
|
|
dep_chain = self.get_dep_chain()
|
||
|
|
# inside role: add the dependency chain from current to dependent
|
||
|
|
if dep_chain:
|
||
|
|
path_stack.extend(reversed([x._role_path for x in dep_chain]))
|
||
|
|
|
||
|
|
# add path of task itself, unless it is already in the list
|
||
|
|
task_dir = os.path.dirname(self.get_path())
|
||
|
|
if task_dir not in path_stack:
|
||
|
|
path_stack.append(task_dir)
|
||
|
|
|
||
|
|
return path_stack
|
||
|
|
|
||
|
|
def all_parents_static(self):
|
||
|
|
if self._parent:
|
||
|
|
return self._parent.all_parents_static()
|
||
|
|
return True
|
||
|
|
|
||
|
|
def get_first_parent_include(self):
|
||
|
|
from ansible.playbook.task_include import TaskInclude
|
||
|
|
if self._parent:
|
||
|
|
if isinstance(self._parent, TaskInclude):
|
||
|
|
return self._parent
|
||
|
|
return self._parent.get_first_parent_include()
|
||
|
|
return None
|