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219 lines
8.0 KiB
Python
219 lines
8.0 KiB
Python
# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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#############################################
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import ast
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import shlex
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import re
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from ansible import constants as C
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from ansible.errors import *
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from ansible.inventory.host import Host
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from ansible.inventory.group import Group
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from ansible.inventory.expand_hosts import detect_range
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from ansible.inventory.expand_hosts import expand_hostname_range
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from ansible.utils.unicode import to_unicode
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class InventoryParser(object):
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"""
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Host inventory for ansible.
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"""
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def __init__(self, filename=C.DEFAULT_HOST_LIST):
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self.filename = filename
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with open(filename) as fh:
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self.lines = fh.readlines()
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self.groups = {}
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self.hosts = {}
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self._parse()
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def _parse(self):
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self._parse_base_groups()
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self._parse_group_children()
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self._add_allgroup_children()
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self._parse_group_variables()
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return self.groups
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@staticmethod
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def _parse_value(v):
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if "#" not in v:
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try:
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v = ast.literal_eval(v)
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# Using explicit exceptions.
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# Likely a string that literal_eval does not like. We wil then just set it.
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except ValueError:
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# For some reason this was thought to be malformed.
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pass
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except SyntaxError:
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# Is this a hash with an equals at the end?
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pass
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return to_unicode(v, nonstring='passthru', errors='strict')
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# [webservers]
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# alpha
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# beta:2345
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# gamma sudo=True user=root
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# delta asdf=jkl favcolor=red
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def _add_allgroup_children(self):
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for group in self.groups.values():
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if group.depth == 0 and group.name != 'all':
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self.groups['all'].add_child_group(group)
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def _parse_base_groups(self):
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# FIXME: refactor
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ungrouped = Group(name='ungrouped')
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all = Group(name='all')
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all.add_child_group(ungrouped)
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self.groups = dict(all=all, ungrouped=ungrouped)
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active_group_name = 'ungrouped'
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for line in self.lines:
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line = self._before_comment(line).strip()
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if line.startswith("[") and line.endswith("]"):
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active_group_name = line.replace("[","").replace("]","")
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if ":vars" in line or ":children" in line:
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active_group_name = active_group_name.rsplit(":", 1)[0]
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if active_group_name not in self.groups:
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new_group = self.groups[active_group_name] = Group(name=active_group_name)
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active_group_name = None
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elif active_group_name not in self.groups:
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new_group = self.groups[active_group_name] = Group(name=active_group_name)
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elif line.startswith(";") or line == '':
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pass
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elif active_group_name:
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tokens = shlex.split(line)
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if len(tokens) == 0:
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continue
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hostname = tokens[0]
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port = C.DEFAULT_REMOTE_PORT
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# Three cases to check:
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# 0. A hostname that contains a range pesudo-code and a port
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# 1. A hostname that contains just a port
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if hostname.count(":") > 1:
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# Possible an IPv6 address, or maybe a host line with multiple ranges
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# IPv6 with Port XXX:XXX::XXX.port
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# FQDN foo.example.com
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if hostname.count(".") == 1:
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(hostname, port) = hostname.rsplit(".", 1)
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elif ("[" in hostname and
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"]" in hostname and
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":" in hostname and
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(hostname.rindex("]") < hostname.rindex(":")) or
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("]" not in hostname and ":" in hostname)):
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(hostname, port) = hostname.rsplit(":", 1)
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hostnames = []
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if detect_range(hostname):
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hostnames = expand_hostname_range(hostname)
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else:
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hostnames = [hostname]
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for hn in hostnames:
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host = None
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if hn in self.hosts:
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host = self.hosts[hn]
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else:
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host = Host(name=hn, port=port)
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self.hosts[hn] = host
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if len(tokens) > 1:
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for t in tokens[1:]:
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if t.startswith('#'):
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break
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try:
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(k,v) = t.split("=", 1)
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except ValueError, e:
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raise AnsibleError("Invalid ini entry in %s: %s - %s" % (self.filename, t, str(e)))
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if k == 'ansible_ssh_host':
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host.ipv4_address = self._parse_value(v)
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else:
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host.set_variable(k, self._parse_value(v))
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self.groups[active_group_name].add_host(host)
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# [southeast:children]
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# atlanta
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# raleigh
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def _parse_group_children(self):
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group = None
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for line in self.lines:
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line = line.strip()
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if line is None or line == '':
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continue
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if line.startswith("[") and ":children]" in line:
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line = line.replace("[","").replace(":children]","")
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group = self.groups.get(line, None)
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if group is None:
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group = self.groups[line] = Group(name=line)
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elif line.startswith("#") or line.startswith(";"):
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pass
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elif line.startswith("["):
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group = None
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elif group:
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kid_group = self.groups.get(line, None)
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if kid_group is None:
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raise AnsibleError("child group is not defined: (%s)" % line)
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else:
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group.add_child_group(kid_group)
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# [webservers:vars]
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# http_port=1234
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# maxRequestsPerChild=200
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def _parse_group_variables(self):
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group = None
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for line in self.lines:
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line = line.strip()
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if line.startswith("[") and ":vars]" in line:
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line = line.replace("[","").replace(":vars]","")
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group = self.groups.get(line, None)
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if group is None:
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raise AnsibleError("can't add vars to undefined group: %s" % line)
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elif line.startswith("#") or line.startswith(";"):
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pass
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elif line.startswith("["):
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group = None
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elif line == '':
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pass
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elif group:
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if "=" not in line:
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raise AnsibleError("variables assigned to group must be in key=value form")
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else:
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(k, v) = [e.strip() for e in line.split("=", 1)]
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group.set_variable(k, self._parse_value(v))
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def get_host_variables(self, host):
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return {}
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def _before_comment(self, msg):
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''' what's the part of a string before a comment? '''
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msg = msg.replace("\#","**NOT_A_COMMENT**")
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msg = msg.split("#")[0]
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msg = msg.replace("**NOT_A_COMMENT**","#")
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return msg
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