ansible-later/env_27/lib/python2.7/site-packages/ansible/vars/hostvars.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 collections
from jinja2.runtime import Undefined
from ansible.module_utils._text import to_bytes
from ansible.template import Templar
STATIC_VARS = [
'ansible_version',
'ansible_play_hosts',
'inventory_hostname',
'inventory_hostname_short',
'inventory_file',
'inventory_dir',
'groups',
'group_names',
'omit',
'playbook_dir',
'play_hosts',
'role_names',
'ungrouped',
]
try:
from hashlib import sha1
except ImportError:
from sha import sha as sha1
__all__ = ['HostVars', 'HostVarsVars']
# Note -- this is a Mapping, not a MutableMapping
class HostVars(collections.Mapping):
''' A special view of vars_cache that adds values from the inventory when needed. '''
def __init__(self, inventory, variable_manager, loader):
self._lookup = dict()
self._inventory = inventory
self._loader = loader
self._variable_manager = variable_manager
variable_manager._hostvars = self
self._cached_result = dict()
def set_variable_manager(self, variable_manager):
self._variable_manager = variable_manager
variable_manager._hostvars = self
def set_inventory(self, inventory):
self._inventory = inventory
def _find_host(self, host_name):
# does not use inventory.hosts so it can create localhost on demand
return self._inventory.get_host(host_name)
def raw_get(self, host_name):
'''
Similar to __getitem__, however the returned data is not run through
the templating engine to expand variables in the hostvars.
'''
host = self._find_host(host_name)
if host is None:
return Undefined(name="hostvars['%s']" % host_name)
return self._variable_manager.get_vars(host=host, include_hostvars=False)
def __getitem__(self, host_name):
data = self.raw_get(host_name)
if isinstance(data, Undefined):
return data
return HostVarsVars(data, loader=self._loader)
def set_host_variable(self, host, varname, value):
self._variable_manager.set_host_variable(host, varname, value)
def set_nonpersistent_facts(self, host, facts):
self._variable_manager.set_nonpersistent_facts(host, facts)
def set_host_facts(self, host, facts):
self._variable_manager.set_host_facts(host, facts)
def __contains__(self, host_name):
# does not use inventory.hosts so it can create localhost on demand
return self._find_host(host_name) is not None
def __iter__(self):
for host in self._inventory.hosts:
yield host
def __len__(self):
return len(self._inventory.hosts)
def __repr__(self):
out = {}
for host in self._inventory.hosts:
out[host] = self.get(host)
return repr(out)
class HostVarsVars(collections.Mapping):
def __init__(self, variables, loader):
self._vars = variables
self._loader = loader
def __getitem__(self, var):
templar = Templar(variables=self._vars, loader=self._loader)
foo = templar.template(self._vars[var], fail_on_undefined=False, static_vars=STATIC_VARS)
return foo
def __contains__(self, var):
return (var in self._vars)
def __iter__(self):
for var in self._vars.keys():
yield var
def __len__(self):
return len(self._vars.keys())
def __repr__(self):
return repr(self._vars)