mirror of
https://github.com/thegeeklab/ansible-later.git
synced 2024-11-18 02:40:40 +00:00
132 lines
4.8 KiB
Python
132 lines
4.8 KiB
Python
# (c) 2012, 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
|
|
|
|
from collections import Mapping
|
|
|
|
from jinja2.utils import missing
|
|
|
|
from ansible.errors import AnsibleError, AnsibleUndefinedVariable
|
|
from ansible.module_utils.six import iteritems
|
|
from ansible.module_utils._text import to_native
|
|
|
|
|
|
__all__ = ['AnsibleJ2Vars']
|
|
|
|
|
|
class AnsibleJ2Vars(Mapping):
|
|
'''
|
|
Helper class to template all variable content before jinja2 sees it. This is
|
|
done by hijacking the variable storage that jinja2 uses, and overriding __contains__
|
|
and __getitem__ to look like a dict. Added bonus is avoiding duplicating the large
|
|
hashes that inject tends to be.
|
|
|
|
To facilitate using builtin jinja2 things like range, globals are also handled here.
|
|
'''
|
|
|
|
def __init__(self, templar, globals, locals=None, *extras):
|
|
'''
|
|
Initializes this object with a valid Templar() object, as
|
|
well as several dictionaries of variables representing
|
|
different scopes (in jinja2 terminology).
|
|
'''
|
|
|
|
self._templar = templar
|
|
self._globals = globals
|
|
self._extras = extras
|
|
self._locals = dict()
|
|
if isinstance(locals, dict):
|
|
for key, val in iteritems(locals):
|
|
if val is not missing:
|
|
if key[:2] == 'l_':
|
|
self._locals[key[2:]] = val
|
|
elif key not in ('context', 'environment', 'template'):
|
|
self._locals[key] = val
|
|
|
|
def __contains__(self, k):
|
|
if k in self._templar._available_variables:
|
|
return True
|
|
if k in self._locals:
|
|
return True
|
|
for i in self._extras:
|
|
if k in i:
|
|
return True
|
|
if k in self._globals:
|
|
return True
|
|
return False
|
|
|
|
def __iter__(self):
|
|
keys = set()
|
|
keys.update(self._templar._available_variables, self._locals, self._globals, *self._extras)
|
|
return iter(keys)
|
|
|
|
def __len__(self):
|
|
keys = set()
|
|
keys.update(self._templar._available_variables, self._locals, self._globals, *self._extras)
|
|
return len(keys)
|
|
|
|
def __getitem__(self, varname):
|
|
if varname not in self._templar._available_variables:
|
|
if varname in self._locals:
|
|
return self._locals[varname]
|
|
for i in self._extras:
|
|
if varname in i:
|
|
return i[varname]
|
|
if varname in self._globals:
|
|
return self._globals[varname]
|
|
else:
|
|
raise KeyError("undefined variable: %s" % varname)
|
|
|
|
variable = self._templar._available_variables[varname]
|
|
|
|
# HostVars is special, return it as-is, as is the special variable
|
|
# 'vars', which contains the vars structure
|
|
from ansible.vars.hostvars import HostVars
|
|
if isinstance(variable, dict) and varname == "vars" or isinstance(variable, HostVars) or hasattr(variable, '__UNSAFE__'):
|
|
return variable
|
|
else:
|
|
value = None
|
|
try:
|
|
value = self._templar.template(variable)
|
|
except AnsibleUndefinedVariable:
|
|
raise
|
|
except Exception as e:
|
|
msg = getattr(e, 'message', None) or to_native(e)
|
|
raise AnsibleError("An unhandled exception occurred while templating '%s'. "
|
|
"Error was a %s, original message: %s" % (to_native(variable), type(e), msg))
|
|
|
|
return value
|
|
|
|
def add_locals(self, locals):
|
|
'''
|
|
If locals are provided, create a copy of self containing those
|
|
locals in addition to what is already in this variable proxy.
|
|
'''
|
|
if locals is None:
|
|
return self
|
|
|
|
# FIXME run this only on jinja2>=2.9?
|
|
# prior to version 2.9, locals contained all of the vars and not just the current
|
|
# local vars so this was not necessary for locals to propagate down to nested includes
|
|
new_locals = self._locals.copy()
|
|
new_locals.update(locals)
|
|
|
|
return AnsibleJ2Vars(self._templar, self._globals, locals=new_locals, *self._extras)
|