ansible-later/ansiblelater/utils/yamlhelper.py
2019-01-28 11:04:44 +01:00

511 lines
18 KiB
Python

# Copyright (c) 2013-2014 Will Thames <will@thames.id.au>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
import glob
import imp
import os
import codecs
import inspect
import six
import ansible.parsing.mod_args
from ansible import constants
from ansible.errors import AnsibleError
from .exceptions import LaterError, LaterAnsibleError
try:
# Try to import the Ansible 2 module first, it's the future-proof one
from ansible.parsing.splitter import split_args
except ImportError:
# Fallback on the Ansible 1.9 module
from ansible.module_utils.splitter import split_args
import yaml
from yaml.composer import Composer
from ansible.parsing.dataloader import DataLoader
from ansible.template import Templar
from ansible.parsing.mod_args import ModuleArgsParser
from ansible.parsing.yaml.constructor import AnsibleConstructor
from ansible.parsing.yaml.loader import AnsibleLoader
from ansible.errors import AnsibleParserError
# ansible-later doesn't need/want to know about encrypted secrets, but it needs
# Ansible 2.3+ allows encrypted secrets within yaml files, so we pass a string
# as the password to enable such yaml files to be opened and parsed successfully.
DEFAULT_VAULT_PASSWORD = 'x'
def parse_yaml_from_file(filepath):
dl = DataLoader()
if hasattr(dl, 'set_vault_password'):
dl.set_vault_password(DEFAULT_VAULT_PASSWORD)
return dl.load_from_file(filepath)
def path_dwim(basedir, given):
dl = DataLoader()
dl.set_basedir(basedir)
return dl.path_dwim(given)
def ansible_template(basedir, varname, templatevars, **kwargs):
dl = DataLoader()
dl.set_basedir(basedir)
templar = Templar(dl, variables=templatevars)
return templar.template(varname, **kwargs)
try:
from ansible.plugins import module_loader
except ImportError:
from ansible.plugins.loader import module_loader
LINE_NUMBER_KEY = '__line__'
FILENAME_KEY = '__file__'
VALID_KEYS = [
'name', 'action', 'when', 'async', 'poll', 'notify',
'first_available_file', 'include', 'import_playbook',
'tags', 'register', 'ignore_errors', 'delegate_to',
'local_action', 'transport', 'remote_user', 'sudo',
'sudo_user', 'sudo_pass', 'when', 'connection', 'environment', 'args', 'always_run',
'any_errors_fatal', 'changed_when', 'failed_when', 'check_mode', 'delay',
'retries', 'until', 'su', 'su_user', 'su_pass', 'no_log', 'run_once',
'become', 'become_user', 'become_method', FILENAME_KEY,
]
BLOCK_NAME_TO_ACTION_TYPE_MAP = {
'tasks': 'task',
'handlers': 'handler',
'pre_tasks': 'task',
'post_tasks': 'task',
'block': 'meta',
'rescue': 'meta',
'always': 'meta',
}
def load_plugins(directory):
result = []
fh = None
for pluginfile in glob.glob(os.path.join(directory, '[A-Za-z]*.py')):
pluginname = os.path.basename(pluginfile.replace('.py', ''))
try:
fh, filename, desc = imp.find_module(pluginname, [directory])
mod = imp.load_module(pluginname, fh, filename, desc)
obj = getattr(mod, pluginname)()
result.append(obj)
finally:
if fh:
fh.close()
return result
def tokenize(line):
tokens = line.lstrip().split(" ")
if tokens[0] == '-':
tokens = tokens[1:]
if tokens[0] == 'action:' or tokens[0] == 'local_action:':
tokens = tokens[1:]
command = tokens[0].replace(":", "")
args = list()
kwargs = dict()
nonkvfound = False
for arg in tokens[1:]:
if "=" in arg and not nonkvfound:
kv = arg.split("=", 1)
kwargs[kv[0]] = kv[1]
else:
nonkvfound = True
args.append(arg)
return (command, args, kwargs)
def _playbook_items(pb_data):
if isinstance(pb_data, dict):
return pb_data.items()
elif not pb_data:
return []
else:
return [item for play in pb_data for item in play.items()]
def find_children(playbook, playbook_dir):
if not os.path.exists(playbook[0]):
return []
if playbook[1] == 'role':
playbook_ds = {'roles': [{'role': playbook[0]}]}
else:
try:
playbook_ds = parse_yaml_from_file(playbook[0])
except AnsibleError as e:
raise SystemExit(str(e))
results = []
basedir = os.path.dirname(playbook[0])
items = _playbook_items(playbook_ds)
for item in items:
for child in play_children(basedir, item, playbook[1], playbook_dir):
if "$" in child['path'] or "{{" in child['path']:
continue
valid_tokens = list()
for token in split_args(child['path']):
if '=' in token:
break
valid_tokens.append(token)
path = ' '.join(valid_tokens)
results.append({
'path': path_dwim(basedir, path),
'type': child['type']
})
return results
def template(basedir, value, vars, fail_on_undefined=False, **kwargs):
try:
value = ansible_template(os.path.abspath(basedir), value, vars,
**dict(kwargs, fail_on_undefined=fail_on_undefined))
# Hack to skip the following exception when using to_json filter on a variable.
# I guess the filter doesn't like empty vars...
except (AnsibleError, ValueError):
# templating failed, so just keep value as is.
pass
return value
def play_children(basedir, item, parent_type, playbook_dir):
delegate_map = {
'tasks': _taskshandlers_children,
'pre_tasks': _taskshandlers_children,
'post_tasks': _taskshandlers_children,
'block': _taskshandlers_children,
'include': _include_children,
'import_playbook': _include_children,
'roles': _roles_children,
'dependencies': _roles_children,
'handlers': _taskshandlers_children,
}
(k, v) = item
play_library = os.path.join(os.path.abspath(basedir), 'library')
_load_library_if_exists(play_library)
if k in delegate_map:
if v:
v = template(os.path.abspath(basedir),
v,
dict(playbook_dir=os.path.abspath(basedir)),
fail_on_undefined=False)
return delegate_map[k](basedir, k, v, parent_type)
return []
def _include_children(basedir, k, v, parent_type):
# handle include: filename.yml tags=blah
(command, args, kwargs) = tokenize("{0}: {1}".format(k, v))
result = path_dwim(basedir, args[0])
if not os.path.exists(result) and not basedir.endswith('tasks'):
result = path_dwim(os.path.join(basedir, '..', 'tasks'), v)
return [{'path': result, 'type': parent_type}]
def _taskshandlers_children(basedir, k, v, parent_type):
results = []
for th in v:
if 'include' in th:
append_children(th['include'], basedir, k, parent_type, results)
elif 'include_tasks' in th:
append_children(th['include_tasks'], basedir, k, parent_type, results)
elif 'import_playbook' in th:
append_children(th['import_playbook'], basedir, k, parent_type, results)
elif 'import_tasks' in th:
append_children(th['import_tasks'], basedir, k, parent_type, results)
elif 'import_role' in th:
results.extend(_roles_children(basedir, k, [th['import_role'].get('name')], parent_type,
main=th['import_role'].get('tasks_from', 'main')))
elif 'include_role' in th:
results.extend(_roles_children(basedir, k, [th['include_role'].get('name')],
parent_type,
main=th['include_role'].get('tasks_from', 'main')))
elif 'block' in th:
results.extend(_taskshandlers_children(basedir, k, th['block'], parent_type))
if 'rescue' in th:
results.extend(_taskshandlers_children(basedir, k, th['rescue'], parent_type))
if 'always' in th:
results.extend(_taskshandlers_children(basedir, k, th['always'], parent_type))
return results
def append_children(taskhandler, basedir, k, parent_type, results):
# when taskshandlers_children is called for playbooks, the
# actual type of the included tasks is the section containing the
# include, e.g. tasks, pre_tasks, or handlers.
if parent_type == 'playbook':
playbook_section = k
else:
playbook_section = parent_type
results.append({
'path': path_dwim(basedir, taskhandler),
'type': playbook_section
})
def _roles_children(basedir, k, v, parent_type, main='main'):
results = []
for role in v:
if isinstance(role, dict):
if 'role' in role or 'name' in role:
if 'tags' not in role or 'skip_ansible_later' not in role['tags']:
results.extend(_look_for_role_files(basedir,
role.get('role', role.get('name')),
main=main))
else:
raise SystemExit('role dict {0} does not contain a "role" '
'or "name" key'.format(role))
else:
results.extend(_look_for_role_files(basedir, role, main=main))
return results
def _load_library_if_exists(path):
if os.path.exists(path):
module_loader.add_directory(path)
def _rolepath(basedir, role):
role_path = None
possible_paths = [
# if included from a playbook
path_dwim(basedir, os.path.join('roles', role)),
path_dwim(basedir, role),
# if included from roles/[role]/meta/main.yml
path_dwim(
basedir, os.path.join('..', '..', '..', 'roles', role)
),
path_dwim(basedir, os.path.join('..', '..', role))
]
if constants.DEFAULT_ROLES_PATH:
search_locations = constants.DEFAULT_ROLES_PATH
if isinstance(search_locations, six.string_types):
search_locations = search_locations.split(os.pathsep)
for loc in search_locations:
loc = os.path.expanduser(loc)
possible_paths.append(path_dwim(loc, role))
for path_option in possible_paths:
if os.path.isdir(path_option):
role_path = path_option
break
if role_path:
_load_library_if_exists(os.path.join(role_path, 'library'))
return role_path
def _look_for_role_files(basedir, role, main='main'):
role_path = _rolepath(basedir, role)
if not role_path:
return []
results = []
for th in ['tasks', 'handlers', 'meta']:
for ext in ('.yml', '.yaml'):
thpath = os.path.join(role_path, th, main + ext)
if os.path.exists(thpath):
results.append({'path': thpath, 'type': th})
break
return results
def rolename(filepath):
idx = filepath.find('roles/')
if idx < 0:
return ''
role = filepath[idx + 6:]
role = role[:role.find('/')]
return role
def _kv_to_dict(v):
(command, args, kwargs) = tokenize(v)
return (dict(__ansible_module__=command, __ansible_arguments__=args, **kwargs))
def normalize_task(task, filename, custom_modules=[]):
'''Ensures tasks have an action key and strings are converted to python objects'''
ansible_action_type = task.get('__ansible_action_type__', 'task')
if '__ansible_action_type__' in task:
del(task['__ansible_action_type__'])
normalized = dict()
# TODO: Workaround for custom modules
builtin = list(ansible.parsing.mod_args.BUILTIN_TASKS)
builtin = list(set(builtin + custom_modules))
ansible.parsing.mod_args.BUILTIN_TASKS = frozenset(builtin)
mod_arg_parser = ModuleArgsParser(task)
try:
action, arguments, normalized['delegate_to'] = mod_arg_parser.parse()
except AnsibleParserError as e:
raise LaterAnsibleError("syntax error", e)
# denormalize shell -> command conversion
if '_uses_shell' in arguments:
action = 'shell'
del(arguments['_uses_shell'])
for (k, v) in list(task.items()):
if k in ('action', 'local_action', 'args', 'delegate_to') or k == action:
# we don't want to re-assign these values, which were
# determined by the ModuleArgsParser() above
continue
else:
normalized[k] = v
normalized['action'] = dict(__ansible_module__=action)
if '_raw_params' in arguments:
normalized['action']['__ansible_arguments__'] = arguments['_raw_params'].split(' ')
del(arguments['_raw_params'])
else:
normalized['action']['__ansible_arguments__'] = list()
normalized['action'].update(arguments)
normalized[FILENAME_KEY] = filename
normalized['__ansible_action_type__'] = ansible_action_type
return normalized
def action_tasks(yaml, file):
tasks = list()
if file['filetype'] in ['tasks', 'handlers']:
tasks = add_action_type(yaml, file['filetype'])
else:
tasks.extend(extract_from_list(yaml, ['tasks', 'handlers', 'pre_tasks', 'post_tasks']))
# Add sub-elements of block/rescue/always to tasks list
tasks.extend(extract_from_list(tasks, ['block', 'rescue', 'always']))
# Remove block/rescue/always elements from tasks list
block_rescue_always = ('block', 'rescue', 'always')
tasks[:] = [task for task in tasks if all(k not in task for k in block_rescue_always)]
return [task for task in tasks if set(
['include', 'include_tasks', 'import_playbook', 'import_tasks']).isdisjoint(task.keys())]
def task_to_str(task):
name = task.get("name")
if name:
return name
action = task.get("action")
args = " ".join([u"{0}={1}".format(k, v) for (k, v) in action.items()
if k not in ["__ansible_module__", "__ansible_arguments__"]
] + action.get("__ansible_arguments__"))
return u"{0} {1}".format(action["__ansible_module__"], args)
def extract_from_list(blocks, candidates):
results = list()
for block in blocks:
for candidate in candidates:
if isinstance(block, dict) and candidate in block:
if isinstance(block[candidate], list):
results.extend(add_action_type(block[candidate], candidate))
elif block[candidate] is not None:
raise RuntimeError(
"Key '%s' defined, but bad value: '%s'" %
(candidate, str(block[candidate])))
return results
def add_action_type(actions, action_type):
results = list()
for action in actions:
action['__ansible_action_type__'] = BLOCK_NAME_TO_ACTION_TYPE_MAP[action_type]
results.append(action)
return results
def parse_yaml_linenumbers(data, filename):
"""Parses yaml as ansible.utils.parse_yaml but with linenumbers.
The line numbers are stored in each node's LINE_NUMBER_KEY key.
"""
def compose_node(parent, index):
# the line number where the previous token has ended (plus empty lines)
line = loader.line
node = Composer.compose_node(loader, parent, index)
node.__line__ = line + 1
return node
def construct_mapping(node, deep=False):
mapping = AnsibleConstructor.construct_mapping(loader, node, deep=deep)
if hasattr(node, '__line__'):
mapping[LINE_NUMBER_KEY] = node.__line__
else:
mapping[LINE_NUMBER_KEY] = mapping._line_number
mapping[FILENAME_KEY] = filename
return mapping
try:
kwargs = {}
if 'vault_password' in inspect.getargspec(AnsibleLoader.__init__).args:
kwargs['vault_password'] = DEFAULT_VAULT_PASSWORD
loader = AnsibleLoader(data, **kwargs)
loader.compose_node = compose_node
loader.construct_mapping = construct_mapping
data = loader.get_single_data()
except (yaml.parser.ParserError, yaml.scanner.ScannerError) as e:
raise LaterError("syntax error", e)
return data
def normalized_yaml(file, options):
lines = []
removes = []
try:
with codecs.open(file, mode='rb', encoding='utf-8') as f:
lines = list(enumerate(f.readlines(), start=1))
for i, line in lines:
if line.strip().startswith("#"):
removes.append((i, line))
# remove document starter also
if options.get("remove_markers") and line.strip() == "---":
removes.append((i, line))
# remove empty lines
if options.get("remove_empty") and not line.strip():
removes.append((i, line))
for line in removes:
lines.remove(line)
except (yaml.parser.ParserError, yaml.scanner.ScannerError) as e:
raise LaterError("syntax error", e)
return lines