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.
397 lines
14 KiB
Python
397 lines
14 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
|
|
|
|
from six import iteritems, string_types
|
|
|
|
import inspect
|
|
import os
|
|
|
|
from hashlib import sha1
|
|
from types import NoneType
|
|
|
|
from ansible.errors import AnsibleError, AnsibleParserError
|
|
from ansible.parsing import DataLoader
|
|
from ansible.playbook.attribute import FieldAttribute
|
|
from ansible.playbook.base import Base
|
|
from ansible.playbook.become import Become
|
|
from ansible.playbook.conditional import Conditional
|
|
from ansible.playbook.helpers import load_list_of_blocks
|
|
from ansible.playbook.role.include import RoleInclude
|
|
from ansible.playbook.role.metadata import RoleMetadata
|
|
from ansible.playbook.taggable import Taggable
|
|
from ansible.plugins import get_all_plugin_loaders
|
|
from ansible.utils.vars import combine_vars
|
|
|
|
|
|
__all__ = ['Role', 'ROLE_CACHE', 'hash_params']
|
|
|
|
# FIXME: this should be a utility function, but can't be a member of
|
|
# the role due to the fact that it would require the use of self
|
|
# in a static method. This is also used in the base class for
|
|
# strategies (ansible/plugins/strategies/__init__.py)
|
|
def hash_params(params):
|
|
if not isinstance(params, dict):
|
|
return params
|
|
else:
|
|
s = set()
|
|
for k,v in params.iteritems():
|
|
if isinstance(v, dict):
|
|
s.update((k, hash_params(v)))
|
|
elif isinstance(v, list):
|
|
things = []
|
|
for item in v:
|
|
things.append(hash_params(item))
|
|
s.update((k, tuple(things)))
|
|
else:
|
|
s.update((k, v))
|
|
return frozenset(s)
|
|
|
|
# The role cache is used to prevent re-loading roles, which
|
|
# may already exist. Keys into this cache are the SHA1 hash
|
|
# of the role definition (for dictionary definitions, this
|
|
# will be based on the repr() of the dictionary object)
|
|
ROLE_CACHE = dict()
|
|
|
|
|
|
class Role(Base, Become, Conditional, Taggable):
|
|
|
|
def __init__(self):
|
|
self._role_name = None
|
|
self._role_path = None
|
|
self._role_params = dict()
|
|
self._loader = None
|
|
|
|
self._metadata = None
|
|
self._play = None
|
|
self._parents = []
|
|
self._dependencies = []
|
|
self._task_blocks = []
|
|
self._handler_blocks = []
|
|
self._default_vars = dict()
|
|
self._role_vars = dict()
|
|
self._had_task_run = False
|
|
self._completed = False
|
|
|
|
super(Role, self).__init__()
|
|
|
|
def __repr__(self):
|
|
return self.get_name()
|
|
|
|
def get_name(self):
|
|
return self._role_name
|
|
|
|
@staticmethod
|
|
def load(role_include, parent_role=None):
|
|
# FIXME: add back in the role caching support
|
|
try:
|
|
# The ROLE_CACHE is a dictionary of role names, with each entry
|
|
# containing another dictionary corresponding to a set of parameters
|
|
# specified for a role as the key and the Role() object itself.
|
|
# We use frozenset to make the dictionary hashable.
|
|
|
|
#hashed_params = frozenset(role_include.get_role_params().iteritems())
|
|
hashed_params = hash_params(role_include.get_role_params())
|
|
if role_include.role in ROLE_CACHE:
|
|
for (entry, role_obj) in ROLE_CACHE[role_include.role].iteritems():
|
|
if hashed_params == entry:
|
|
if parent_role:
|
|
role_obj.add_parent(parent_role)
|
|
return role_obj
|
|
|
|
r = Role()
|
|
r._load_role_data(role_include, parent_role=parent_role)
|
|
|
|
if role_include.role not in ROLE_CACHE:
|
|
ROLE_CACHE[role_include.role] = dict()
|
|
|
|
ROLE_CACHE[role_include.role][hashed_params] = r
|
|
return r
|
|
|
|
except RuntimeError:
|
|
# FIXME: needs a better way to access the ds in the role include
|
|
raise AnsibleError("A recursion loop was detected with the roles specified. Make sure child roles do not have dependencies on parent roles", obj=role_include._ds)
|
|
|
|
def _load_role_data(self, role_include, parent_role=None):
|
|
self._role_name = role_include.role
|
|
self._role_path = role_include.get_role_path()
|
|
self._role_params = role_include.get_role_params()
|
|
self._variable_manager = role_include.get_variable_manager()
|
|
self._loader = role_include.get_loader()
|
|
|
|
if parent_role:
|
|
self.add_parent(parent_role)
|
|
|
|
# copy over all field attributes, except for when and tags, which
|
|
# are special cases and need to preserve pre-existing values
|
|
for (attr_name, _) in iteritems(self._get_base_attributes()):
|
|
if attr_name not in ('when', 'tags'):
|
|
setattr(self, attr_name, getattr(role_include, attr_name))
|
|
|
|
current_when = getattr(self, 'when')[:]
|
|
current_when.extend(role_include.when)
|
|
setattr(self, 'when', current_when)
|
|
|
|
current_tags = getattr(self, 'tags')[:]
|
|
current_tags.extend(role_include.tags)
|
|
setattr(self, 'tags', current_tags)
|
|
|
|
# dynamically load any plugins from the role directory
|
|
for name, obj in get_all_plugin_loaders():
|
|
if obj.subdir:
|
|
plugin_path = os.path.join(self._role_path, obj.subdir)
|
|
if os.path.isdir(plugin_path):
|
|
obj.add_directory(plugin_path)
|
|
|
|
# load the role's other files, if they exist
|
|
metadata = self._load_role_yaml('meta')
|
|
if metadata:
|
|
self._metadata = RoleMetadata.load(metadata, owner=self, loader=self._loader)
|
|
self._dependencies = self._load_dependencies()
|
|
|
|
task_data = self._load_role_yaml('tasks')
|
|
if task_data:
|
|
self._task_blocks = load_list_of_blocks(task_data, play=None, role=self, loader=self._loader)
|
|
|
|
handler_data = self._load_role_yaml('handlers')
|
|
if handler_data:
|
|
self._handler_blocks = load_list_of_blocks(handler_data, play=None, role=self, loader=self._loader)
|
|
|
|
# vars and default vars are regular dictionaries
|
|
self._role_vars = self._load_role_yaml('vars')
|
|
if not isinstance(self._role_vars, (dict, NoneType)):
|
|
raise AnsibleParserError("The vars/main.yml file for role '%s' must contain a dictionary of variables" % self._role_name)
|
|
elif self._role_vars is None:
|
|
self._role_vars = dict()
|
|
|
|
self._default_vars = self._load_role_yaml('defaults')
|
|
if not isinstance(self._default_vars, (dict, NoneType)):
|
|
raise AnsibleParserError("The default/main.yml file for role '%s' must contain a dictionary of variables" % self._role_name)
|
|
elif self._default_vars is None:
|
|
self._default_vars = dict()
|
|
|
|
def _load_role_yaml(self, subdir):
|
|
file_path = os.path.join(self._role_path, subdir)
|
|
if self._loader.path_exists(file_path) and self._loader.is_directory(file_path):
|
|
main_file = self._resolve_main(file_path)
|
|
if self._loader.path_exists(main_file):
|
|
return self._loader.load_from_file(main_file)
|
|
return None
|
|
|
|
def _resolve_main(self, basepath):
|
|
''' flexibly handle variations in main filenames '''
|
|
possible_mains = (
|
|
os.path.join(basepath, 'main.yml'),
|
|
os.path.join(basepath, 'main.yaml'),
|
|
os.path.join(basepath, 'main.json'),
|
|
os.path.join(basepath, 'main'),
|
|
)
|
|
|
|
if sum([self._loader.is_file(x) for x in possible_mains]) > 1:
|
|
raise AnsibleError("found multiple main files at %s, only one allowed" % (basepath))
|
|
else:
|
|
for m in possible_mains:
|
|
if self._loader.is_file(m):
|
|
return m # exactly one main file
|
|
return possible_mains[0] # zero mains (we still need to return something)
|
|
|
|
def _load_dependencies(self):
|
|
'''
|
|
Recursively loads role dependencies from the metadata list of
|
|
dependencies, if it exists
|
|
'''
|
|
|
|
deps = []
|
|
if self._metadata:
|
|
for role_include in self._metadata.dependencies:
|
|
r = Role.load(role_include, parent_role=self)
|
|
deps.append(r)
|
|
|
|
return deps
|
|
|
|
#------------------------------------------------------------------------------
|
|
# other functions
|
|
|
|
def add_parent(self, parent_role):
|
|
''' adds a role to the list of this roles parents '''
|
|
assert isinstance(parent_role, Role)
|
|
|
|
if parent_role not in self._parents:
|
|
self._parents.append(parent_role)
|
|
|
|
def get_parents(self):
|
|
return self._parents
|
|
|
|
def get_default_vars(self):
|
|
# FIXME: get these from dependent roles too
|
|
default_vars = dict()
|
|
for dep in self.get_all_dependencies():
|
|
default_vars = combine_vars(default_vars, dep.get_default_vars())
|
|
default_vars = combine_vars(default_vars, self._default_vars)
|
|
return default_vars
|
|
|
|
def get_inherited_vars(self):
|
|
inherited_vars = dict()
|
|
for parent in self._parents:
|
|
inherited_vars = combine_vars(inherited_vars, parent.get_inherited_vars())
|
|
inherited_vars = combine_vars(inherited_vars, parent._role_vars)
|
|
inherited_vars = combine_vars(inherited_vars, parent._role_params)
|
|
return inherited_vars
|
|
|
|
def get_vars(self):
|
|
all_vars = self.get_inherited_vars()
|
|
|
|
for dep in self.get_all_dependencies():
|
|
all_vars = combine_vars(all_vars, dep.get_vars())
|
|
|
|
all_vars = combine_vars(all_vars, self._role_vars)
|
|
all_vars = combine_vars(all_vars, self._role_params)
|
|
|
|
return all_vars
|
|
|
|
def get_direct_dependencies(self):
|
|
return self._dependencies[:]
|
|
|
|
def get_all_dependencies(self):
|
|
'''
|
|
Returns a list of all deps, built recursively from all child dependencies,
|
|
in the proper order in which they should be executed or evaluated.
|
|
'''
|
|
|
|
child_deps = []
|
|
|
|
for dep in self.get_direct_dependencies():
|
|
for child_dep in dep.get_all_dependencies():
|
|
child_deps.append(child_dep)
|
|
child_deps.append(dep)
|
|
|
|
return child_deps
|
|
|
|
def get_task_blocks(self):
|
|
return self._task_blocks[:]
|
|
|
|
def get_handler_blocks(self):
|
|
return self._handler_blocks[:]
|
|
|
|
def has_run(self):
|
|
'''
|
|
Returns true if this role has been iterated over completely and
|
|
at least one task was run
|
|
'''
|
|
|
|
return self._had_task_run and self._completed
|
|
|
|
def compile(self, play, dep_chain=[]):
|
|
'''
|
|
Returns the task list for this role, which is created by first
|
|
recursively compiling the tasks for all direct dependencies, and
|
|
then adding on the tasks for this role.
|
|
|
|
The role compile() also remembers and saves the dependency chain
|
|
with each task, so tasks know by which route they were found, and
|
|
can correctly take their parent's tags/conditionals into account.
|
|
'''
|
|
|
|
block_list = []
|
|
|
|
# update the dependency chain here
|
|
new_dep_chain = dep_chain + [self]
|
|
|
|
deps = self.get_direct_dependencies()
|
|
for dep in deps:
|
|
dep_blocks = dep.compile(play=play, dep_chain=new_dep_chain)
|
|
for dep_block in dep_blocks:
|
|
new_dep_block = dep_block.copy()
|
|
new_dep_block._dep_chain = new_dep_chain
|
|
new_dep_block._play = play
|
|
block_list.append(new_dep_block)
|
|
|
|
block_list.extend(self._task_blocks)
|
|
|
|
return block_list
|
|
|
|
def serialize(self, include_deps=True):
|
|
res = super(Role, self).serialize()
|
|
|
|
res['_role_name'] = self._role_name
|
|
res['_role_path'] = self._role_path
|
|
res['_role_vars'] = self._role_vars
|
|
res['_role_params'] = self._role_params
|
|
res['_default_vars'] = self._default_vars
|
|
res['_had_task_run'] = self._had_task_run
|
|
res['_completed'] = self._completed
|
|
|
|
if self._metadata:
|
|
res['_metadata'] = self._metadata.serialize()
|
|
|
|
if include_deps:
|
|
deps = []
|
|
for role in self.get_direct_dependencies():
|
|
deps.append(role.serialize())
|
|
res['_dependencies'] = deps
|
|
|
|
parents = []
|
|
for parent in self._parents:
|
|
parents.append(parent.serialize(include_deps=False))
|
|
res['_parents'] = parents
|
|
|
|
return res
|
|
|
|
def deserialize(self, data, include_deps=True):
|
|
self._role_name = data.get('_role_name', '')
|
|
self._role_path = data.get('_role_path', '')
|
|
self._role_vars = data.get('_role_vars', dict())
|
|
self._role_params = data.get('_role_params', dict())
|
|
self._default_vars = data.get('_default_vars', dict())
|
|
self._had_task_run = data.get('_had_task_run', False)
|
|
self._completed = data.get('_completed', False)
|
|
|
|
if include_deps:
|
|
deps = []
|
|
for dep in data.get('_dependencies', []):
|
|
r = Role()
|
|
r.deserialize(dep)
|
|
deps.append(r)
|
|
setattr(self, '_dependencies', deps)
|
|
|
|
parent_data = data.get('_parents', [])
|
|
parents = []
|
|
for parent in parent_data:
|
|
r = Role()
|
|
r.deserialize(parent, include_deps=False)
|
|
parents.append(r)
|
|
setattr(self, '_parents', parents)
|
|
|
|
metadata_data = data.get('_metadata')
|
|
if metadata_data:
|
|
m = RoleMetadata()
|
|
m.deserialize(metadata_data)
|
|
self._metadata = m
|
|
|
|
super(Role, self).deserialize(data)
|
|
|
|
def set_loader(self, loader):
|
|
self._loader = loader
|
|
for parent in self._parents:
|
|
parent.set_loader(loader)
|
|
for dep in self.get_direct_dependencies():
|
|
dep.set_loader(loader)
|
|
|