Coverage for lib/ansible/vars/hostvars.py : 45%

# (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)