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# (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/>.
#############################################
import ansible.constants as C
from ansible.inventory.host import Host
from ansible.inventory.group import Group
from ansible.inventory.expand_hosts import detect_range
from ansible.inventory.expand_hosts import expand_hostname_range
from ansible import errors
import shlex
class InventoryParser(object):
"""
Host inventory for ansible.
"""
def __init__(self, filename=C.DEFAULT_HOST_LIST):
fh = open(filename)
self.lines = fh.readlines()
self.groups = {}
self.hosts = {}
self._parse()
def _parse(self):
self._parse_base_groups()
self._parse_group_children()
self._parse_group_variables()
return self.groups
# [webservers]
# alpha
# beta:2345
# gamma sudo=True user=root
# delta asdf=jkl favcolor=red
def _parse_base_groups(self):
# FIXME: refactor
ungrouped = Group(name='ungrouped')
all = Group(name='all')
all.add_child_group(ungrouped)
self.groups = dict(all=all, ungrouped=ungrouped)
active_group_name = 'ungrouped'
for line in self.lines:
if line.startswith("["):
active_group_name = line.replace("[","").replace("]","").strip()
if line.find(":vars") != -1 or line.find(":children") != -1:
active_group_name = None
else:
new_group = self.groups[active_group_name] = Group(name=active_group_name)
all.add_child_group(new_group)
elif line.startswith("#") or line == '':
pass
elif active_group_name:
tokens = shlex.split(line)
if len(tokens) == 0:
continue
hostname = tokens[0]
port = C.DEFAULT_REMOTE_PORT
# Two cases to check:
# 0. A hostname that contains a range pesudo-code and a port
# 1. A hostname that contains just a port
if (hostname.find("[") != -1 and
hostname.find("]") != -1 and
hostname.find(":") != -1 and
(hostname.rindex("]") < hostname.rindex(":")) or
(hostname.find("]") == -1 and hostname.find(":") != -1)):
tokens2 = hostname.rsplit(":", 1)
hostname = tokens2[0]
port = tokens2[1]
host = None
_all_hosts = []
if hostname in self.hosts:
host = self.hosts[hostname]
_all_hosts.append(host)
else:
if detect_range(hostname):
_hosts = expand_hostname_range(hostname)
for _ in _hosts:
host = Host(name=_, port=port)
self.hosts[_] = host
_all_hosts.append(host)
else:
host = Host(name=hostname, port=port)
self.hosts[hostname] = host
_all_hosts.append(host)
if len(tokens) > 1:
for t in tokens[1:]:
(k,v) = t.split("=")
host.set_variable(k,v)
for _ in _all_hosts:
self.groups[active_group_name].add_host(_)
# [southeast:children]
# atlanta
# raleigh
def _parse_group_children(self):
group = None
for line in self.lines:
line = line.strip()
if line is None or line == '':
continue
if line.startswith("[") and line.find(":children]") != -1:
line = line.replace("[","").replace(":children]","")
group = self.groups.get(line, None)
if group is None:
group = self.groups[line] = Group(name=line)
elif line.startswith("#"):
pass
elif line.startswith("["):
group = None
elif group:
kid_group = self.groups.get(line, None)
if kid_group is None:
raise errors.AnsibleError("child group is not defined: (%s)" % line)
else:
group.add_child_group(kid_group)
# [webservers:vars]
# http_port=1234
# maxRequestsPerChild=200
def _parse_group_variables(self):
group = None
for line in self.lines:
line = line.strip()
if line.startswith("[") and line.find(":vars]") != -1:
line = line.replace("[","").replace(":vars]","")
group = self.groups.get(line, None)
if group is None:
raise errors.AnsibleError("can't add vars to undefined group: %s" % line)
elif line.startswith("#"):
pass
elif line.startswith("["):
group = None
elif line == '':
pass
elif group:
if line.find("=") == -1:
raise errors.AnsibleError("variables assigned to group must be in key=value form")
else:
(k,v) = line.split("=",1)
group.set_variable(k,v)
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