mirror of
https://github.com/thegeeklab/ansible-later.git
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221 lines
8.4 KiB
Python
221 lines
8.4 KiB
Python
# (c) 2014 Michael DeHaan, <michael@ansible.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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# Make coding more python3-ish
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import os
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from ansible import constants as C
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from ansible.errors import AnsibleError, AnsibleAssertionError
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from ansible.module_utils.six import iteritems, string_types
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from ansible.parsing.yaml.objects import AnsibleBaseYAMLObject, AnsibleMapping
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from ansible.playbook.attribute import Attribute, FieldAttribute
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from ansible.playbook.base import Base
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from ansible.playbook.become import Become
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from ansible.playbook.conditional import Conditional
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from ansible.playbook.taggable import Taggable
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from ansible.template import Templar
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from ansible.utils.path import unfrackpath
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try:
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from __main__ import display
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except ImportError:
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from ansible.utils.display import Display
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display = Display()
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__all__ = ['RoleDefinition']
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class RoleDefinition(Base, Become, Conditional, Taggable):
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_role = FieldAttribute(isa='string')
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def __init__(self, play=None, role_basedir=None, variable_manager=None, loader=None):
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super(RoleDefinition, self).__init__()
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self._play = play
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self._variable_manager = variable_manager
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self._loader = loader
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self._role_path = None
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self._role_basedir = role_basedir
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self._role_params = dict()
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# def __repr__(self):
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# return 'ROLEDEF: ' + self._attributes.get('role', '<no name set>')
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@staticmethod
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def load(data, variable_manager=None, loader=None):
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raise AnsibleError("not implemented")
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def preprocess_data(self, ds):
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# role names that are simply numbers can be parsed by PyYAML
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# as integers even when quoted, so turn it into a string type
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if isinstance(ds, int):
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ds = "%s" % ds
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if not isinstance(ds, dict) and not isinstance(ds, string_types) and not isinstance(ds, AnsibleBaseYAMLObject):
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raise AnsibleAssertionError()
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if isinstance(ds, dict):
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ds = super(RoleDefinition, self).preprocess_data(ds)
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# save the original ds for use later
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self._ds = ds
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# we create a new data structure here, using the same
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# object used internally by the YAML parsing code so we
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# can preserve file:line:column information if it exists
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new_ds = AnsibleMapping()
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if isinstance(ds, AnsibleBaseYAMLObject):
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new_ds.ansible_pos = ds.ansible_pos
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# first we pull the role name out of the data structure,
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# and then use that to determine the role path (which may
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# result in a new role name, if it was a file path)
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role_name = self._load_role_name(ds)
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(role_name, role_path) = self._load_role_path(role_name)
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# next, we split the role params out from the valid role
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# attributes and update the new datastructure with that
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# result and the role name
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if isinstance(ds, dict):
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(new_role_def, role_params) = self._split_role_params(ds)
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new_ds.update(new_role_def)
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self._role_params = role_params
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# set the role name in the new ds
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new_ds['role'] = role_name
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# we store the role path internally
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self._role_path = role_path
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# and return the cleaned-up data structure
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return new_ds
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def _load_role_name(self, ds):
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'''
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Returns the role name (either the role: or name: field) from
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the role definition, or (when the role definition is a simple
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string), just that string
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'''
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if isinstance(ds, string_types):
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return ds
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role_name = ds.get('role', ds.get('name'))
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if not role_name or not isinstance(role_name, string_types):
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raise AnsibleError('role definitions must contain a role name', obj=ds)
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# if we have the required datastructures, and if the role_name
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# contains a variable, try and template it now
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if self._variable_manager:
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all_vars = self._variable_manager.get_vars(play=self._play)
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templar = Templar(loader=self._loader, variables=all_vars)
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if templar._contains_vars(role_name):
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role_name = templar.template(role_name)
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return role_name
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def _load_role_path(self, role_name):
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'''
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the 'role', as specified in the ds (or as a bare string), can either
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be a simple name or a full path. If it is a full path, we use the
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basename as the role name, otherwise we take the name as-given and
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append it to the default role path
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'''
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# we always start the search for roles in the base directory of the playbook
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role_search_paths = [
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os.path.join(self._loader.get_basedir(), u'roles'),
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]
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# also search in the configured roles path
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if C.DEFAULT_ROLES_PATH:
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role_search_paths.extend(C.DEFAULT_ROLES_PATH)
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# next, append the roles basedir, if it was set, so we can
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# search relative to that directory for dependent roles
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if self._role_basedir:
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role_search_paths.append(self._role_basedir)
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# finally as a last resort we look in the current basedir as set
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# in the loader (which should be the playbook dir itself) but without
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# the roles/ dir appended
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role_search_paths.append(self._loader.get_basedir())
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# create a templar class to template the dependency names, in
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# case they contain variables
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if self._variable_manager is not None:
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all_vars = self._variable_manager.get_vars(play=self._play)
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else:
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all_vars = dict()
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templar = Templar(loader=self._loader, variables=all_vars)
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role_name = templar.template(role_name)
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# now iterate through the possible paths and return the first one we find
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for path in role_search_paths:
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path = templar.template(path)
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role_path = unfrackpath(os.path.join(path, role_name))
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if self._loader.path_exists(role_path):
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return (role_name, role_path)
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# if not found elsewhere try to extract path from name
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role_path = unfrackpath(role_name)
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if self._loader.path_exists(role_path):
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role_name = os.path.basename(role_name)
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return (role_name, role_path)
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raise AnsibleError("the role '%s' was not found in %s" % (role_name, ":".join(role_search_paths)), obj=self._ds)
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def _split_role_params(self, ds):
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'''
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Splits any random role params off from the role spec and store
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them in a dictionary of params for parsing later
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'''
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role_def = dict()
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role_params = dict()
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base_attribute_names = frozenset(self._valid_attrs.keys())
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for (key, value) in iteritems(ds):
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# use the list of FieldAttribute values to determine what is and is not
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# an extra parameter for this role (or sub-class of this role)
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# FIXME: hard-coded list of exception key names here corresponds to the
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# connection fields in the Base class. There may need to be some
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# other mechanism where we exclude certain kinds of field attributes,
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# or make this list more automatic in some way so we don't have to
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# remember to update it manually.
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if key not in base_attribute_names:
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# this key does not match a field attribute, so it must be a role param
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role_params[key] = value
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else:
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# this is a field attribute, so copy it over directly
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role_def[key] = value
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return (role_def, role_params)
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def get_role_params(self):
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return self._role_params.copy()
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def get_role_path(self):
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return self._role_path
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