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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/>.
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
from ansible.errors import AnsibleError
class Group:
''' a group of ansible hosts '''
#__slots__ = [ 'name', 'hosts', 'vars', 'child_groups', 'parent_groups', 'depth', '_hosts_cache' ]
def __init__(self, name=None):
self.depth = 0
self.name = name
self.hosts = []
self.vars = {}
self.child_groups = []
self.parent_groups = []
self._hosts_cache = None
self.priority = 1
#self.clear_hosts_cache()
#if self.name is None:
# raise Exception("group name is required")
def __repr__(self):
return self.get_name()
def __getstate__(self):
return self.serialize()
def __setstate__(self, data):
return self.deserialize(data)
def serialize(self):
parent_groups = []
for parent in self.parent_groups:
parent_groups.append(parent.serialize())
result = dict(
name=self.name,
vars=self.vars.copy(),
parent_groups=parent_groups,
depth=self.depth,
)
return result
def deserialize(self, data):
self.__init__()
self.name = data.get('name')
self.vars = data.get('vars', dict())
self.depth = data.get('depth', 0)
parent_groups = data.get('parent_groups', [])
for parent_data in parent_groups:
g = Group()
g.deserialize(parent_data)
self.parent_groups.append(g)
def get_name(self):
return self.name
def add_child_group(self, group):
if self == group:
raise Exception("can't add group to itself")
# don't add if it's already there
if group not in self.child_groups:
self.child_groups.append(group)
# update the depth of the child
group.depth = max([self.depth+1, group.depth])
# update the depth of the grandchildren
group._check_children_depth()
# now add self to child's parent_groups list, but only if there
# isn't already a group with the same name
if self.name not in [g.name for g in group.parent_groups]:
group.parent_groups.append(self)
self.clear_hosts_cache()
def _check_children_depth(self):
try:
for group in self.child_groups:
group.depth = max([self.depth+1, group.depth])
group._check_children_depth()
except RuntimeError:
raise AnsibleError("The group named '%s' has a recursive dependency loop." % self.name)
def add_host(self, host):
self.hosts.append(host)
host.add_group(self)
self.clear_hosts_cache()
def set_variable(self, key, value):
self.vars[key] = value
def clear_hosts_cache(self):
self._hosts_cache = None
for g in self.parent_groups:
g.clear_hosts_cache()
def get_hosts(self):
if self._hosts_cache is None:
self._hosts_cache = self._get_hosts()
return self._hosts_cache
def _get_hosts(self):
hosts = []
seen = {}
for kid in self.child_groups:
kid_hosts = kid.get_hosts()
for kk in kid_hosts:
if kk not in seen:
seen[kk] = 1
if self.name == 'all' and kk.implicit:
continue
hosts.append(kk)
for mine in self.hosts:
if mine not in seen:
seen[mine] = 1
if self.name == 'all' and mine.implicit:
continue
hosts.append(mine)
return hosts
def get_vars(self):
return self.vars.copy()
def _get_ancestors(self):
results = {}
for g in self.parent_groups:
results[g.name] = g
results.update(g._get_ancestors())
return results
def get_ancestors(self):
return self._get_ancestors().values()
def set_priority(self, priority):
try:
self.priority = int(priority)
except TypeError:
#FIXME: warn about invalid priority
pass
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