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playbook_include.py
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playbook_include.py
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# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import os
from ansible.errors import AnsibleParserError, AnsibleError
from ansible.module_utils.six import iteritems
from ansible.parsing.splitter import split_args, parse_kv
from ansible.parsing.yaml.objects import AnsibleBaseYAMLObject, AnsibleMapping
from ansible.playbook.attribute import FieldAttribute
from ansible.playbook.base import Base
from ansible.playbook.conditional import Conditional
from ansible.playbook.taggable import Taggable
from ansible.template import Templar
class PlaybookInclude(Base, Conditional, Taggable):
_name = FieldAttribute(isa='string')
_include = FieldAttribute(isa='string')
_vars = FieldAttribute(isa='dict', default=dict())
@staticmethod
def load(data, basedir, variable_manager=None, loader=None):
return PlaybookInclude().load_data(ds=data, basedir=basedir, variable_manager=variable_manager, loader=loader)
def load_data(self, ds, basedir, variable_manager=None, loader=None):
'''
Overrides the base load_data(), as we're actually going to return a new
Playbook() object rather than a PlaybookInclude object
'''
# import here to avoid a dependency loop
from ansible.playbook import Playbook
from ansible.playbook.play import Play
# first, we use the original parent method to correctly load the object
# via the load_data/preprocess_data system we normally use for other
# playbook objects
new_obj = super(PlaybookInclude, self).load_data(ds, variable_manager, loader)
all_vars = self.vars.copy()
if variable_manager:
all_vars.update(variable_manager.get_vars(loader=loader))
templar = Templar(loader=loader, variables=all_vars)
# then we use the object to load a Playbook
pb = Playbook(loader=loader)
file_name = templar.template(new_obj.include)
if not os.path.isabs(file_name):
file_name = os.path.join(basedir, file_name)
pb._load_playbook_data(file_name=file_name, variable_manager=variable_manager)
# finally, update each loaded playbook entry with any variables specified
# on the included playbook and/or any tags which may have been set
for entry in pb._entries:
# conditional includes on a playbook need a marker to skip gathering
if new_obj.when and isinstance(entry, Play):
entry._included_conditional = new_obj.when[:]
temp_vars = entry.vars.copy()
temp_vars.update(new_obj.vars)
param_tags = temp_vars.pop('tags', None)
if param_tags is not None:
entry.tags.extend(param_tags.split(','))
entry.vars = temp_vars
entry.tags = list(set(entry.tags).union(new_obj.tags))
if entry._included_path is None:
entry._included_path = os.path.dirname(file_name)
# Check to see if we need to forward the conditionals on to the included
# plays. If so, we can take a shortcut here and simply prepend them to
# those attached to each block (if any)
if new_obj.when:
for task_block in (entry.pre_tasks + entry.roles + entry.tasks + entry.post_tasks):
task_block._attributes['when'] = new_obj.when[:] + task_block.when[:]
return pb
def preprocess_data(self, ds):
'''
Regorganizes the data for a PlaybookInclude datastructure to line
up with what we expect the proper attributes to be
'''
assert isinstance(ds, dict)
# the new, cleaned datastructure, which will have legacy
# items reduced to a standard structure
new_ds = AnsibleMapping()
if isinstance(ds, AnsibleBaseYAMLObject):
new_ds.ansible_pos = ds.ansible_pos
for (k,v) in iteritems(ds):
if k == 'include':
self._preprocess_include(ds, new_ds, k, v)
else:
# some basic error checking, to make sure vars are properly
# formatted and do not conflict with k=v parameters
if k == 'vars':
if 'vars' in new_ds:
raise AnsibleParserError("include parameters cannot be mixed with 'vars' entries for include statements", obj=ds)
elif not isinstance(v, dict):
raise AnsibleParserError("vars for include statements must be specified as a dictionary", obj=ds)
new_ds[k] = v
return super(PlaybookInclude, self).preprocess_data(new_ds)
def _preprocess_include(self, ds, new_ds, k, v):
'''
Splits the include line up into filename and parameters
'''
if v is None:
raise AnsibleParserError("include parameter is missing", obj=ds)
# The include line must include at least one item, which is the filename
# to include. Anything after that should be regarded as a parameter to the include
items = split_args(v)
if len(items) == 0:
raise AnsibleParserError("include statements must specify the file name to include", obj=ds)
else:
new_ds['include'] = items[0]
if len(items) > 1:
# rejoin the parameter portion of the arguments and
# then use parse_kv() to get a dict of params back
params = parse_kv(" ".join(items[1:]))
if 'tags' in params:
new_ds['tags'] = params.pop('tags')
if 'vars' in new_ds:
raise AnsibleParserError("include parameters cannot be mixed with 'vars' entries for include statements", obj=ds)
new_ds['vars'] = params