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community.general/lib/ansible/vars/reserved.py
2017-08-18 17:45:39 -04:00

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2.5 KiB
Python

# (c) 2017 Ansible By Red Hat
#
# 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
from ansible.playbook import Play
from ansible.playbook.block import Block
from ansible.playbook.role import Role
from ansible.playbook.task import Task
try:
from __main__ import display
except ImportError:
from ansible.utils.display import Display
display = Display()
def get_reserved_names(include_private=True):
''' this function returns the list of reserved names associated with play objects'''
public = set()
private = set()
result = set()
# FIXME: find a way to 'not hardcode', possibly need role deps/includes
class_list = [Play, Role, Block, Task]
for aclass in class_list:
aobj = aclass()
# build ordered list to loop over and dict with attributes
for attribute in aobj.__dict__['_attributes']:
if 'private' in attribute:
private.add(attribute)
else:
public.add(attribute)
# local_action is implicit with action
if 'action' in public:
public.add('local_action')
# loop implies with_
# FIXME: remove after with_ is not only deprecated but removed
if 'loop' in private or 'loop' in public:
public.add('with_')
if include_private:
result = public.union(private)
else:
result = public
return result
def warn_if_reserved(myvars):
''' this function warns if any variable passed conflicts with internally reserved names '''
varnames = set(myvars)
varnames.discard('vars') # we add this one internally, so safe to ignore
for varname in varnames.intersection(_RESERVED_NAMES):
display.warning('Found variable using reserved name: %s' % varname)
_RESERVED_NAMES = frozenset(get_reserved_names())