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334 lines
15 KiB
Python
334 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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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.compat.six import string_types
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from ansible.errors import AnsibleParserError, AnsibleUndefinedVariable, AnsibleFileNotFound
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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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def load_list_of_blocks(ds, play, parent_block=None, role=None, task_include=None, use_handlers=False, variable_manager=None, loader=None):
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'''
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Given a list of mixed task/block data (parsed from YAML),
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return a list of Block() objects, where implicit blocks
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are created for each bare Task.
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'''
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# we import here to prevent a circular dependency with imports
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from ansible.playbook.block import Block
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from ansible.playbook.task_include import TaskInclude
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from ansible.playbook.role_include import IncludeRole
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assert isinstance(ds, (list, type(None)))
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block_list = []
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if ds:
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for block_ds in ds:
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b = Block.load(
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block_ds,
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play=play,
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parent_block=parent_block,
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role=role,
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task_include=task_include,
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use_handlers=use_handlers,
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variable_manager=variable_manager,
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loader=loader,
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)
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# Implicit blocks are created by bare tasks listed in a play without
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# an explicit block statement. If we have two implicit blocks in a row,
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# squash them down to a single block to save processing time later.
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if b._implicit and len(block_list) > 0 and block_list[-1]._implicit:
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for t in b.block:
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if isinstance(t._parent, (TaskInclude, IncludeRole)):
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t._parent._parent = block_list[-1]
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else:
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t._parent = block_list[-1]
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block_list[-1].block.extend(b.block)
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else:
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block_list.append(b)
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return block_list
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def load_list_of_tasks(ds, play, block=None, role=None, task_include=None, use_handlers=False, variable_manager=None, loader=None):
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'''
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Given a list of task datastructures (parsed from YAML),
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return a list of Task() or TaskInclude() objects.
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'''
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# we import here to prevent a circular dependency with imports
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from ansible.playbook.block import Block
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from ansible.playbook.handler import Handler
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from ansible.playbook.task import Task
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from ansible.playbook.task_include import TaskInclude
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from ansible.playbook.role_include import IncludeRole
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from ansible.playbook.handler_task_include import HandlerTaskInclude
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from ansible.template import Templar
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assert isinstance(ds, list)
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task_list = []
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for task_ds in ds:
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assert isinstance(task_ds, dict)
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if 'block' in task_ds:
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t = Block.load(
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task_ds,
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play=play,
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parent_block=block,
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role=role,
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task_include=task_include,
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use_handlers=use_handlers,
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variable_manager=variable_manager,
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loader=loader,
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)
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task_list.append(t)
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else:
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if 'include' in task_ds:
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if use_handlers:
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include_class = HandlerTaskInclude
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else:
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include_class = TaskInclude
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t = include_class.load(
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task_ds,
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block=block,
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role=role,
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task_include=None,
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variable_manager=variable_manager,
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loader=loader
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)
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all_vars = variable_manager.get_vars(loader=loader, play=play, task=t)
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templar = Templar(loader=loader, variables=all_vars)
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# check to see if this include is dynamic or static:
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# 1. the user has set the 'static' option to false or true
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# 2. one of the appropriate config options was set
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if t.static is not None:
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is_static = t.static
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else:
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is_static = C.DEFAULT_TASK_INCLUDES_STATIC or \
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(use_handlers and C.DEFAULT_HANDLER_INCLUDES_STATIC) or \
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(not templar._contains_vars(t.args['_raw_params']) and t.all_parents_static() and not t.loop)
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if is_static:
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if t.loop is not None:
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raise AnsibleParserError("You cannot use 'static' on an include with a loop", obj=task_ds)
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# we set a flag to indicate this include was static
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t.statically_loaded = True
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# handle relative includes by walking up the list of parent include
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# tasks and checking the relative result to see if it exists
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parent_include = block
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cumulative_path = None
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found = False
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subdir = 'tasks'
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if use_handlers:
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subdir = 'handlers'
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while parent_include is not None:
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if not isinstance(parent_include, TaskInclude):
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parent_include = parent_include._parent
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continue
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parent_include_dir = templar.template(os.path.dirname(parent_include.args.get('_raw_params')))
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if cumulative_path is None:
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cumulative_path = parent_include_dir
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elif not os.path.isabs(cumulative_path):
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cumulative_path = os.path.join(parent_include_dir, cumulative_path)
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include_target = templar.template(t.args['_raw_params'])
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if t._role:
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new_basedir = os.path.join(t._role._role_path, subdir, cumulative_path)
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include_file = loader.path_dwim_relative(new_basedir, subdir, include_target)
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else:
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include_file = loader.path_dwim_relative(loader.get_basedir(), cumulative_path, include_target)
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if os.path.exists(include_file):
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found = True
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break
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else:
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parent_include = parent_include._parent
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if not found:
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try:
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include_target = templar.template(t.args['_raw_params'])
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except AnsibleUndefinedVariable:
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raise AnsibleParserError(
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"Error when evaluating variable in include name: %s.\n\n" \
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"When using static includes, ensure that any variables used in their names are defined in vars/vars_files\n" \
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"or extra-vars passed in from the command line. Static includes cannot use variables from inventory\n" \
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"sources like group or host vars." % t.args['_raw_params'],
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obj=task_ds,
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suppress_extended_error=True,
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)
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if t._role:
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include_file = loader.path_dwim_relative(t._role._role_path, subdir, include_target)
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else:
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include_file = loader.path_dwim(include_target)
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try:
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data = loader.load_from_file(include_file)
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if data is None:
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return []
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elif not isinstance(data, list):
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raise AnsibleParserError("included task files must contain a list of tasks", obj=data)
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# since we can't send callbacks here, we display a message directly in
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# the same fashion used by the on_include callback. We also do it here,
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# because the recursive nature of helper methods means we may be loading
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# nested includes, and we want the include order printed correctly
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display.vv("statically included: %s" % include_file)
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except AnsibleFileNotFound:
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if t.static or \
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C.DEFAULT_TASK_INCLUDES_STATIC or \
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C.DEFAULT_HANDLER_INCLUDES_STATIC and use_handlers:
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raise
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display.deprecated(
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"Included file '%s' not found, however since this include is not " \
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"explicitly marked as 'static: yes', we will try and include it dynamically " \
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"later. In the future, this will be an error unless 'static: no' is used " \
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"on the include task. If you do not want missing includes to be considered " \
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"dynamic, use 'static: yes' on the include or set the global ansible.cfg " \
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"options to make all inclues static for tasks and/or handlers" % include_file,
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)
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task_list.append(t)
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continue
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ti_copy = t.copy(exclude_parent=True)
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ti_copy._parent = block
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included_blocks = load_list_of_blocks(
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data,
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play=play,
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parent_block=None,
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task_include=ti_copy,
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role=role,
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use_handlers=use_handlers,
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loader=loader,
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variable_manager=variable_manager,
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)
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# pop tags out of the include args, if they were specified there, and assign
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# them to the include. If the include already had tags specified, we raise an
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# error so that users know not to specify them both ways
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tags = ti_copy.vars.pop('tags', [])
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if isinstance(tags, string_types):
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tags = tags.split(',')
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if len(tags) > 0:
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if len(ti_copy.tags) > 0:
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raise AnsibleParserError(
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"Include tasks should not specify tags in more than one way (both via args and directly on the task). " \
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"Mixing styles in which tags are specified is prohibited for whole import hierarchy, not only for single import statement",
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obj=task_ds,
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suppress_extended_error=True,
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)
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display.deprecated("You should not specify tags in the include parameters. All tags should be specified using the task-level option")
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else:
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tags = ti_copy.tags[:]
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# now we extend the tags on each of the included blocks
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for b in included_blocks:
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b.tags = list(set(b.tags).union(tags))
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# END FIXME
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# FIXME: handlers shouldn't need this special handling, but do
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# right now because they don't iterate blocks correctly
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if use_handlers:
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for b in included_blocks:
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task_list.extend(b.block)
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else:
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task_list.extend(included_blocks)
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else:
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task_list.append(t)
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elif 'include_role' in task_ds:
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ir = IncludeRole.load(
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task_ds,
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block=block,
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role=role,
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task_include=None,
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variable_manager=variable_manager,
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loader=loader
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)
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# 1. the user has set the 'static' option to false or true
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# 2. one of the appropriate config options was set
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if ir.static is not None:
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is_static = ir.static
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else:
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display.debug('Determine if include_role is static')
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# Check to see if this include is dynamic or static:
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all_vars = variable_manager.get_vars(loader=loader, play=play, task=ir)
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templar = Templar(loader=loader, variables=all_vars)
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needs_templating = False
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for param in ir.args:
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if templar._contains_vars(ir.args[param]):
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if not templar.templatable(ir.args[param]):
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needs_templating = True
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break
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is_static = C.DEFAULT_TASK_INCLUDES_STATIC or \
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(use_handlers and C.DEFAULT_HANDLER_INCLUDES_STATIC) or \
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(not needs_templating and ir.all_parents_static() and not ir.loop)
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display.debug('Determined that if include_role static is %s' % str(is_static))
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if is_static:
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# uses compiled list from object
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t = task_list.extend(ir.get_block_list(variable_manager=variable_manager, loader=loader))
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else:
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# passes task object itself for latter generation of list
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t = task_list.append(ir)
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else:
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if use_handlers:
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t = Handler.load(task_ds, block=block, role=role, task_include=task_include, variable_manager=variable_manager, loader=loader)
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else:
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t = Task.load(task_ds, block=block, role=role, task_include=task_include, variable_manager=variable_manager, loader=loader)
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task_list.append(t)
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return task_list
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def load_list_of_roles(ds, play, current_role_path=None, variable_manager=None, loader=None):
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'''
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Loads and returns a list of RoleInclude objects from the datastructure
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list of role definitions
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'''
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# we import here to prevent a circular dependency with imports
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from ansible.playbook.role.include import RoleInclude
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assert isinstance(ds, list)
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roles = []
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for role_def in ds:
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i = RoleInclude.load(role_def, play=play, current_role_path=current_role_path, variable_manager=variable_manager, loader=loader)
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roles.append(i)
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return roles
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