mirror of https://github.com/ansible/ansible.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
346 lines
12 KiB
Python
346 lines
12 KiB
Python
# (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/>.
|
|
|
|
# Make coding more python3-ish
|
|
from __future__ import (absolute_import, division, print_function)
|
|
__metaclass__ = type
|
|
|
|
import uuid
|
|
|
|
from functools import partial
|
|
from inspect import getmembers
|
|
from io import FileIO
|
|
|
|
from six import iteritems, string_types
|
|
|
|
from jinja2.exceptions import UndefinedError
|
|
|
|
from ansible.errors import AnsibleParserError
|
|
from ansible.parsing import DataLoader
|
|
from ansible.playbook.attribute import Attribute, FieldAttribute
|
|
from ansible.template import Templar
|
|
from ansible.utils.boolean import boolean
|
|
|
|
from ansible.utils.debug import debug
|
|
|
|
from ansible.template import template
|
|
|
|
class Base:
|
|
|
|
# connection/transport
|
|
_connection = FieldAttribute(isa='string')
|
|
_port = FieldAttribute(isa='int')
|
|
_remote_user = FieldAttribute(isa='string')
|
|
|
|
# vars and flags
|
|
_vars = FieldAttribute(isa='dict', default=dict())
|
|
_environment = FieldAttribute(isa='dict', default=dict())
|
|
_no_log = FieldAttribute(isa='bool', default=False)
|
|
|
|
def __init__(self):
|
|
|
|
# initialize the data loader and variable manager, which will be provided
|
|
# later when the object is actually loaded
|
|
self._loader = None
|
|
self._variable_manager = None
|
|
|
|
# every object gets a random uuid:
|
|
self._uuid = uuid.uuid4()
|
|
|
|
# and initialize the base attributes
|
|
self._initialize_base_attributes()
|
|
|
|
# The following three functions are used to programatically define data
|
|
# descriptors (aka properties) for the Attributes of all of the playbook
|
|
# objects (tasks, blocks, plays, etc).
|
|
#
|
|
# The function signature is a little strange because of how we define
|
|
# them. We use partial to give each method the name of the Attribute that
|
|
# it is for. Since partial prefills the positional arguments at the
|
|
# beginning of the function we end up with the first positional argument
|
|
# being allocated to the name instead of to the class instance (self) as
|
|
# normal. To deal with that we make the property name field the first
|
|
# positional argument and self the second arg.
|
|
#
|
|
# Because these methods are defined inside of the class, they get bound to
|
|
# the instance when the object is created. After we run partial on them
|
|
# and put the result back into the class as a property, they get bound
|
|
# a second time. This leads to self being placed in the arguments twice.
|
|
# To work around that, we mark the functions as @staticmethod so that the
|
|
# first binding to the instance doesn't happen.
|
|
|
|
@staticmethod
|
|
def _generic_g(prop_name, self):
|
|
method = "_get_attr_%s" % prop_name
|
|
if method in dir(self):
|
|
return getattr(self, method)()
|
|
|
|
return self._attributes[prop_name]
|
|
|
|
@staticmethod
|
|
def _generic_s(prop_name, self, value):
|
|
self._attributes[prop_name] = value
|
|
|
|
@staticmethod
|
|
def _generic_d(prop_name, self):
|
|
del self._attributes[prop_name]
|
|
|
|
def _get_base_attributes(self):
|
|
'''
|
|
Returns the list of attributes for this class (or any subclass thereof).
|
|
If the attribute name starts with an underscore, it is removed
|
|
'''
|
|
base_attributes = dict()
|
|
for (name, value) in getmembers(self.__class__):
|
|
if isinstance(value, Attribute):
|
|
if name.startswith('_'):
|
|
name = name[1:]
|
|
base_attributes[name] = value
|
|
return base_attributes
|
|
|
|
def _initialize_base_attributes(self):
|
|
# each class knows attributes set upon it, see Task.py for example
|
|
self._attributes = dict()
|
|
|
|
for (name, value) in self._get_base_attributes().items():
|
|
getter = partial(self._generic_g, name)
|
|
setter = partial(self._generic_s, name)
|
|
deleter = partial(self._generic_d, name)
|
|
|
|
# Place the property into the class so that cls.name is the
|
|
# property functions.
|
|
setattr(Base, name, property(getter, setter, deleter))
|
|
|
|
# Place the value into the instance so that the property can
|
|
# process and hold that value/
|
|
setattr(self, name, value.default)
|
|
|
|
def preprocess_data(self, ds):
|
|
''' infrequently used method to do some pre-processing of legacy terms '''
|
|
|
|
for base_class in self.__class__.mro():
|
|
method = getattr(self, "_preprocess_data_%s" % base_class.__name__.lower(), None)
|
|
if method:
|
|
return method(ds)
|
|
return ds
|
|
|
|
def load_data(self, ds, variable_manager=None, loader=None):
|
|
''' walk the input datastructure and assign any values '''
|
|
|
|
assert ds is not None
|
|
|
|
# the variable manager class is used to manage and merge variables
|
|
# down to a single dictionary for reference in templating, etc.
|
|
self._variable_manager = variable_manager
|
|
|
|
# the data loader class is used to parse data from strings and files
|
|
if loader is not None:
|
|
self._loader = loader
|
|
else:
|
|
self._loader = DataLoader()
|
|
|
|
if isinstance(ds, string_types) or isinstance(ds, FileIO):
|
|
ds = self._loader.load(ds)
|
|
|
|
# call the preprocess_data() function to massage the data into
|
|
# something we can more easily parse, and then call the validation
|
|
# function on it to ensure there are no incorrect key values
|
|
ds = self.preprocess_data(ds)
|
|
self._validate_attributes(ds)
|
|
|
|
# Walk all attributes in the class.
|
|
#
|
|
# FIXME: we currently don't do anything with private attributes but
|
|
# may later decide to filter them out of 'ds' here.
|
|
|
|
for name in self._get_base_attributes():
|
|
# copy the value over unless a _load_field method is defined
|
|
if name in ds:
|
|
method = getattr(self, '_load_%s' % name, None)
|
|
if method:
|
|
self._attributes[name] = method(name, ds[name])
|
|
else:
|
|
self._attributes[name] = ds[name]
|
|
|
|
# run early, non-critical validation
|
|
self.validate()
|
|
|
|
# cache the datastructure internally
|
|
setattr(self, '_ds', ds)
|
|
|
|
# return the constructed object
|
|
return self
|
|
|
|
def get_ds(self):
|
|
try:
|
|
return getattr(self, '_ds')
|
|
except AttributeError:
|
|
return None
|
|
|
|
def get_loader(self):
|
|
return self._loader
|
|
|
|
def get_variable_manager(self):
|
|
return self._variable_manager
|
|
|
|
def _validate_attributes(self, ds):
|
|
'''
|
|
Ensures that there are no keys in the datastructure which do
|
|
not map to attributes for this object.
|
|
'''
|
|
|
|
valid_attrs = frozenset(name for name in self._get_base_attributes())
|
|
for key in ds:
|
|
if key not in valid_attrs:
|
|
raise AnsibleParserError("'%s' is not a valid attribute for a %s" % (key, self.__class__.__name__), obj=ds)
|
|
|
|
def validate(self, all_vars=dict()):
|
|
''' validation that is done at parse time, not load time '''
|
|
|
|
# walk all fields in the object
|
|
for (name, attribute) in iteritems(self._get_base_attributes()):
|
|
|
|
# run validator only if present
|
|
method = getattr(self, '_validate_%s' % name, None)
|
|
if method:
|
|
method(attribute, name, getattr(self, name))
|
|
|
|
def copy(self):
|
|
'''
|
|
Create a copy of this object and return it.
|
|
'''
|
|
|
|
new_me = self.__class__()
|
|
|
|
for name in self._get_base_attributes():
|
|
setattr(new_me, name, getattr(self, name))
|
|
|
|
new_me._loader = self._loader
|
|
new_me._variable_manager = self._variable_manager
|
|
|
|
return new_me
|
|
|
|
def post_validate(self, templar):
|
|
'''
|
|
we can't tell that everything is of the right type until we have
|
|
all the variables. Run basic types (from isa) as well as
|
|
any _post_validate_<foo> functions.
|
|
'''
|
|
|
|
basedir = None
|
|
if self._loader is not None:
|
|
basedir = self._loader.get_basedir()
|
|
|
|
for (name, attribute) in iteritems(self._get_base_attributes()):
|
|
|
|
if getattr(self, name) is None:
|
|
if not attribute.required:
|
|
continue
|
|
else:
|
|
raise AnsibleParserError("the field '%s' is required but was not set" % name)
|
|
|
|
try:
|
|
# if the attribute contains a variable, template it now
|
|
value = templar.template(getattr(self, name))
|
|
|
|
# run the post-validator if present
|
|
method = getattr(self, '_post_validate_%s' % name, None)
|
|
if method:
|
|
value = method(attribute, value, all_vars, templar._fail_on_undefined_errors)
|
|
else:
|
|
# otherwise, just make sure the attribute is of the type it should be
|
|
if attribute.isa == 'string':
|
|
value = unicode(value)
|
|
elif attribute.isa == 'int':
|
|
value = int(value)
|
|
elif attribute.isa == 'bool':
|
|
value = boolean(value)
|
|
elif attribute.isa == 'list':
|
|
if not isinstance(value, list):
|
|
value = [ value ]
|
|
elif attribute.isa == 'dict' and not isinstance(value, dict):
|
|
raise TypeError()
|
|
|
|
# and assign the massaged value back to the attribute field
|
|
setattr(self, name, value)
|
|
|
|
except (TypeError, ValueError) as e:
|
|
raise AnsibleParserError("the field '%s' has an invalid value (%s), and could not be converted to an %s. Error was: %s" % (name, value, attribute.isa, e), obj=self.get_ds())
|
|
except UndefinedError as e:
|
|
if templar._fail_on_undefined_errors:
|
|
raise AnsibleParserError("the field '%s' has an invalid value, which appears to include a variable that is undefined. The error was: %s" % (name,e), obj=self.get_ds())
|
|
|
|
def serialize(self):
|
|
'''
|
|
Serializes the object derived from the base object into
|
|
a dictionary of values. This only serializes the field
|
|
attributes for the object, so this may need to be overridden
|
|
for any classes which wish to add additional items not stored
|
|
as field attributes.
|
|
'''
|
|
|
|
repr = dict()
|
|
|
|
for name in self._get_base_attributes():
|
|
repr[name] = getattr(self, name)
|
|
|
|
# serialize the uuid field
|
|
repr['uuid'] = getattr(self, '_uuid')
|
|
|
|
return repr
|
|
|
|
def deserialize(self, data):
|
|
'''
|
|
Given a dictionary of values, load up the field attributes for
|
|
this object. As with serialize(), if there are any non-field
|
|
attribute data members, this method will need to be overridden
|
|
and extended.
|
|
'''
|
|
|
|
assert isinstance(data, dict)
|
|
|
|
for (name, attribute) in iteritems(self._get_base_attributes()):
|
|
if name in data:
|
|
setattr(self, name, data[name])
|
|
else:
|
|
setattr(self, name, attribute.default)
|
|
|
|
# restore the UUID field
|
|
setattr(self, '_uuid', data.get('uuid'))
|
|
|
|
def _extend_value(self, value, new_value):
|
|
'''
|
|
Will extend the value given with new_value (and will turn both
|
|
into lists if they are not so already). The values are run through
|
|
a set to remove duplicate values.
|
|
'''
|
|
|
|
if not isinstance(value, list):
|
|
value = [ value ]
|
|
if not isinstance(new_value, list):
|
|
new_value = [ new_value ]
|
|
|
|
return list(set(value + new_value))
|
|
|
|
def __getstate__(self):
|
|
return self.serialize()
|
|
|
|
def __setstate__(self, data):
|
|
self.__init__()
|
|
self.deserialize(data)
|
|
|