mirror of
https://github.com/ansible-collections/community.general.git
synced 2025-07-08 22:30:04 -07:00
87969868d4
moved from the field attribute declaration and created a placeholder which then is resolved in the field attribute class. this is to avoid unwanted persistent of the defaults across objects which introduces stealth bugs when multiple objects of the same kind are used in succession while not overriding the default values.
404 lines
15 KiB
Python
404 lines
15 KiB
Python
# (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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from ansible.compat.six import iteritems, string_types
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from ansible.errors import AnsibleError
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from ansible.parsing.mod_args import ModuleArgsParser
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from ansible.parsing.yaml.objects import AnsibleBaseYAMLObject, AnsibleMapping, AnsibleUnicode
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from ansible.plugins 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.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='_ansible_container')
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_action = FieldAttribute(isa='string')
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_any_errors_fatal = FieldAttribute(isa='bool')
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_async = FieldAttribute(isa='int', default=0)
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_changed_when = FieldAttribute(isa='string')
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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', default=False)
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_failed_when = FieldAttribute(isa='string')
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_first_available_file = FieldAttribute(isa='list')
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_loop = FieldAttribute(isa='string', private=True)
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_loop_args = FieldAttribute(isa='list', private=True)
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_name = FieldAttribute(isa='string', default='')
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_notify = FieldAttribute(isa='list')
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_poll = FieldAttribute(isa='int')
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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')
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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._block = block
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self._role = role
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self._task_include = task_include
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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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if hasattr(self, '_ds'):
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return "%s:%s" % (self._ds._data_source, self._ds._line_number)
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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:
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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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flattened_args = self._merge_kv(self.args)
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if self._role:
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return "%s : %s %s" % (self._role.get_name(), self.action, flattened_args)
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else:
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return "%s %s" % (self.action, flattened_args)
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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_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:
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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'] = loop_name
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new_ds['loop_args'] = v
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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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assert isinstance(ds, dict)
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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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(action, args, delegate_to) = args_parser.parse()
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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.pop('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
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# determined by the ModuleArgsParser() above
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continue
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elif k.replace("with_", "") in lookup_loader:
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self._preprocess_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
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# top level of the task, so we move those into the 'vars' dictionary
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# here, and show a deprecation message as we will remove this at
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# some point in the future.
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if action == 'include' and k not in self._get_base_attributes() 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:\nhttp://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")
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new_ds['vars'][k] = v
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else:
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new_ds[k] = v
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return super(Task, self).preprocess_data(new_ds)
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def _load_any_errors_fatal(self, attr, value):
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'''
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Exists only to show a deprecation warning, as this attribute is not valid
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at the task level.
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'''
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display.deprecated("Setting any_errors_fatal on a task is no longer supported. This should be set at the play level only")
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return None
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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._block:
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self._block.post_validate(templar)
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if self._task_include:
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self._task_include.post_validate(templar)
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super(Task, self).post_validate(templar)
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def _post_validate_loop_args(self, attr, value, templar):
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'''
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Override post validation for the loop args 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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if value is None:
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return dict()
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for env_item in value:
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if isinstance(env_item, (string_types, AnsibleUnicode)) and env_item in templar._available_variables.keys():
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display.deprecated("Using bare variables for environment is deprecated."
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" Update your playbooks so that the environment value uses the full variable syntax ('{{foo}}')")
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break
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return templar.template(value, convert_bare=True)
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def get_vars(self):
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all_vars = dict()
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if self._block:
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all_vars.update(self._block.get_vars())
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if self._task_include:
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all_vars.update(self._task_include.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._task_include:
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all_vars.update(self._task_include.get_include_params())
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if self.action == 'include':
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all_vars.update(self.vars)
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return all_vars
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def copy(self, exclude_block=False):
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new_me = super(Task, self).copy()
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new_me._block = None
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if self._block and not exclude_block:
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new_me._block = self._block.copy()
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new_me._role = None
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if self._role:
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new_me._role = self._role
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new_me._task_include = None
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if self._task_include:
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new_me._task_include = self._task_include.copy(exclude_block=exclude_block)
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return new_me
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def serialize(self):
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data = super(Task, self).serialize()
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if self._block:
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data['block'] = self._block.serialize()
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if self._role:
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data['role'] = self._role.serialize()
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if self._task_include:
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data['task_include'] = self._task_include.serialize()
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return data
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def deserialize(self, data):
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# import is here to avoid import loops
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#from ansible.playbook.task_include import TaskInclude
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block_data = data.get('block')
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if block_data:
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b = Block()
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b.deserialize(block_data)
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self._block = b
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del data['block']
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role_data = data.get('role')
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if role_data:
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r = Role()
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r.deserialize(role_data)
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self._role = r
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del data['role']
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ti_data = data.get('task_include')
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if ti_data:
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#ti = TaskInclude()
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ti = Task()
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ti.deserialize(ti_data)
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self._task_include = ti
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del data['task_include']
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super(Task, self).deserialize(data)
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def evaluate_conditional(self, templar, all_vars):
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if self._block is not None:
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if not self._block.evaluate_conditional(templar, all_vars):
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return False
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if self._task_include is not None:
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if not self._task_include.evaluate_conditional(templar, all_vars):
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return False
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return super(Task, self).evaluate_conditional(templar, all_vars)
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def set_loader(self, loader):
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'''
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Sets the loader on this object and recursively on parent, child objects.
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This is used primarily after the Task has been serialized/deserialized, which
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does not preserve the loader.
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'''
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self._loader = loader
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if self._block:
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self._block.set_loader(loader)
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if self._task_include:
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self._task_include.set_loader(loader)
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def _get_parent_attribute(self, attr, extend=False):
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'''
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Generic logic to get the attribute or parent attribute for a task value.
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'''
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value = None
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try:
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value = self._attributes[attr]
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if self._block and (value is None or extend):
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parent_value = getattr(self._block, attr)
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if extend:
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value = self._extend_value(value, parent_value)
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else:
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value = parent_value
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if self._task_include and (value is None or extend):
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parent_value = getattr(self._task_include, attr)
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if extend:
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value = self._extend_value(value, parent_value)
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else:
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value = parent_value
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except KeyError:
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pass
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return value
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def _get_attr_environment(self):
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'''
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Override for the 'tags' getattr fetcher, used from Base.
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'''
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environment = self._attributes['environment']
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parent_environment = self._get_parent_attribute('environment', extend=True)
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if parent_environment is not None:
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environment = self._extend_value(environment, parent_environment)
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return environment
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