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# Copyright 2017 RedHat, inc
#
# 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/>.
#############################################
'''
DOCUMENTATION:
vars: host_group_vars
version_added: "2.4"
short_description: In charge of loading group_vars and host_vars
description:
- Loads YAML vars into corresponding groups/hosts in group_vars/ and host_vars/ directories.
- Files are restricted by extension to one of .yaml, .json, .yml or no extension.
- Hidden (starting with '.') and backup (ending with '~') files and directories are ignored.
- Only applies to inventory sources that are existing paths.
notes:
- It takes the place of the previously hardcoded group_vars/host_vars loading.
'''
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import os
from ansible import constants as C
from ansible.errors import AnsibleParserError
from ansible.module_utils._text import to_bytes, to_text
from ansible.plugins.vars import BaseVarsPlugin
from ansible.inventory.host import Host
from ansible.inventory.group import Group
from ansible.utils.vars import combine_vars
FOUND = {}
class VarsModule(BaseVarsPlugin):
def get_vars(self, loader, path, entities, cache=True):
''' parses the inventory file '''
if not isinstance(entities, list):
entities = [entities]
super(VarsModule, self).get_vars(loader, path, entities)
data = {}
for entity in entities:
if isinstance(entity, Host):
subdir = 'host_vars'
elif isinstance(entity, Group):
subdir = 'group_vars'
else:
raise AnsibleParserError("Supplied entity must be Host or Group, got %s instead" % (type(entity)))
try:
found_files = []
# load vars
opath = os.path.realpath(os.path.join(self._basedir, subdir))
key = '%s.%s' % (entity.name, opath)
if cache and key in FOUND:
found_files = FOUND[key]
else:
b_opath = to_bytes(opath)
# no need to do much if path does not exist for basedir
if os.path.exists(b_opath):
if os.path.isdir(b_opath):
self._display.debug("\tprocessing dir %s" % opath)
found_files = self._find_vars_files(opath, entity.name)
FOUND[key] = found_files
else:
self._display.warning("Found %s that is not a directory, skipping: %s" % (subdir, opath))
for found in found_files:
new_data = loader.load_from_file(found, cache=True, unsafe=True)
if new_data: # ignore empty files
data = combine_vars(data, new_data)
except Exception as e:
raise AnsibleParserError(to_text(e))
return data
def _find_vars_files(self, path, name):
""" Find {group,host}_vars files """
b_path = to_bytes(os.path.join(path, name))
found = []
# first look for w/o extensions
if os.path.exists(b_path):
if os.path.isdir(b_path):
found.extend(self._get_dir_files(b_path))
else:
found.append(b_path)
else:
# add valid extensions to name
for ext in C.YAML_FILENAME_EXTENSIONS:
if '.' in ext:
full_path = b_path + to_bytes(ext)
elif ext:
full_path = b'.'.join([b_path, to_bytes(ext)])
else:
full_path = b_path
if os.path.exists(full_path) and os.path.isfile(full_path):
found.append(full_path)
break
return found
def _get_dir_files(self, path):
found = []
for spath in os.listdir(path):
if not spath.startswith('.') and not spath.endswith('~'): # skip hidden and backups
ext = os.path.splitext(spath)[-1]
full_spath = os.path.join(path, spath)
if os.path.isdir(full_spath) and not ext: # recursive search if dir
found.extend(self._get_dir_files(full_spath))
elif os.path.isfile(full_spath) and (not ext or ext in C.YAML_FILENAME_EXTENSIONS):
# only consider files with valid extensions or no extension
found.append(full_spath)
return found
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