266 lines
11 KiB
Python
266 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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"Leadership support"
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# Copyright (C) 2014-2024 Team tiramisu (see AUTHORS for all contributors)
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published by the
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# Free Software Foundation, either version 3 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# The original `Config` design model is unproudly borrowed from
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# the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
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# the whole pypy projet is under MIT licence
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# ____________________________________________________________
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import weakref
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from typing import List, Iterator, Optional
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from ..i18n import _
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from ..setting import groups, undefined, ALLOWED_LEADER_PROPERTIES
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from .optiondescription import OptionDescription
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# from .syndynoption import SynDynLeadership
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from .baseoption import BaseOption
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from .option import Option
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from ..error import LeadershipError
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from ..autolib import Calculation
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class Leadership(OptionDescription):
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"""Leadership
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"""
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# pylint: disable=too-many-arguments
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__slots__ = ('leader',
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'followers',
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)
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def __init__(self,
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name: str,
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doc: str,
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children: List[BaseOption],
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properties=None) -> None:
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super().__init__(name,
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doc,
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children,
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properties=properties)
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self._group_type = groups.leadership
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followers = []
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if len(children) < 2:
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raise ValueError(_('a leader and a follower are mandatories in leadership "{}"'
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'').format(name))
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leader = children[0]
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for idx, child in enumerate(children):
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if __debug__:
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self._check_child_is_valid(child)
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if idx != 0:
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if __debug__:
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self._check_default_value(child)
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# remove empty property for follower
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child._properties = frozenset(child._properties - {'empty', 'unique'})
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followers.append(child)
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child._add_dependency(self)
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child._leadership = weakref.ref(self)
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if __debug__:
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for prop in leader.impl_getproperties():
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if prop not in ALLOWED_LEADER_PROPERTIES and not isinstance(prop, Calculation):
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raise LeadershipError(_('leader cannot have "{}" property').format(prop))
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def _check_child_is_valid(self, child: BaseOption):
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if child.impl_is_symlinkoption():
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raise ValueError(_('leadership "{0}" shall not have '
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"a symlinkoption").format(self.impl_get_display_name(None)))
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if not isinstance(child, Option):
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raise ValueError(_('leadership "{0}" shall not have '
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'a subgroup').format(self.impl_get_display_name(None)))
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if not child.impl_is_multi():
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raise ValueError(_('only multi option allowed in leadership "{0}" but option '
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'"{1}" is not a multi'
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'').format(self.impl_get_display_name(None),
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child.impl_get_display_name(None)))
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def _check_default_value(self, child: BaseOption):
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default = child.impl_getdefault()
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if default != []:
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if child.impl_is_submulti() and isinstance(default, (list, tuple)):
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for val in default:
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if not isinstance(val, Calculation):
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calculation = False
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break
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else:
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# empty default is valid
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calculation = True
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else:
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calculation = isinstance(default, Calculation)
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if not calculation:
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raise ValueError(_('not allowed default value for follower option '
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f'"{child.impl_get_display_name(None)}" in leadership '
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f'"{self.impl_get_display_name(None)}"'))
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def _setsubdyn(self,
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subdyn,
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) -> None:
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for chld in self._children[1]:
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chld._setsubdyn(subdyn)
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super()._setsubdyn(subdyn)
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def is_leader(self,
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opt: Option,
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) -> bool:
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"""the option is the leader
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"""
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leader = self.get_leader()
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if opt.impl_is_dynsymlinkoption():
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opt = opt.opt
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return opt == leader
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def get_leader(self) -> Option:
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"""get leader
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"""
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return self._children[1][0]
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def get_followers(self) -> Iterator[Option]:
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"""get all followers
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"""
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for follower in self._children[1][1:]:
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yield follower
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def in_same_leadership(self,
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opt: Option,
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) -> bool:
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"""check if followers are in same leadership
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"""
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if opt.impl_is_dynsymlinkoption():
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opt = opt.opt
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return opt in self._children[1]
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def reset(self, parent: "SubConfig") -> None:
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"""reset follower value
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"""
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values = parent.config_bag.context.get_values()
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for follower in self.get_followers():
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subconfig_follower = parent.get_child(follower,
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None,
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False,
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)
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values.reset(subconfig_follower,
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validate=False,
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)
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def follower_force_store_value(self,
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value,
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subconfig: 'SubConfig',
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owner,
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) -> None:
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"""apply force_store_value to follower
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"""
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if not value:
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return
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config_bag = subconfig.config_bag
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values = config_bag.context.get_values()
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for idx, follower in enumerate(self.get_children()):
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sub_subconfig = subconfig.get_child(follower,
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None,
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False,
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config_bag=config_bag,
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)
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if 'force_store_value' not in sub_subconfig.properties:
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continue
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self_path = sub_subconfig.path
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if not idx:
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# it's a master
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apply_requires = True
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indexes = [None]
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else:
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apply_requires = False
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indexes = range(len(value))
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for index in indexes:
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i_sub_subconfig = subconfig.get_child(follower,
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index,
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False,
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config_bag=config_bag,
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)
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values.set_storage_value(self_path,
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index,
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values.get_value(i_sub_subconfig)[0],
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owner,
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)
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def pop(self,
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subconfig: 'SubConfig',
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index: int,
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*,
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followers: Optional[List[Option]]=undefined,
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) -> None:
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"""pop leader value and follower's one
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"""
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if followers is undefined:
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# followers are not undefined only in SynDynLeadership
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followers = self.get_followers()
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config_bag = subconfig.config_bag.copy()
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config_bag.remove_validation()
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values = config_bag.context.get_values()
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for follower in followers:
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sub_subconfig = subconfig.parent.get_child(follower,
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index,
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True,
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properties=set(), # do not check force_default_on_freeze
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# or force_metaconfig_on_freeze
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config_bag=config_bag,
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)
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values.reduce_index(sub_subconfig)
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def reset_cache(self,
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path: str,
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config_bag: 'ConfigBag',
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resetted_opts: List[Option],
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) -> None:
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self._reset_cache(path,
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self.get_leader(),
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self.get_followers(),
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config_bag,
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resetted_opts,
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)
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def _reset_cache(self,
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path: str,
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leader: Option,
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followers: List[Option],
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config_bag: 'ConfigBag',
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resetted_opts: List[Option],
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) -> None:
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super().reset_cache(path,
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config_bag,
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resetted_opts,
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)
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leader_path = leader.impl_getpath()
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if leader_path not in resetted_opts:
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leader.reset_cache(leader_path,
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config_bag,
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resetted_opts,
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)
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for follower in followers:
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follower_path = follower.impl_getpath()
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if follower_path not in resetted_opts:
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follower.reset_cache(follower_path,
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config_bag,
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resetted_opts,
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)
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def impl_is_leadership(self) -> None:
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return True
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#
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# def to_dynoption(self,
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# rootpath: str,
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# suffixes: Optional[list],
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# ) -> SynDynLeadership:
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# return SynDynLeadership(self,
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# rootpath,
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# suffixes,
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# )
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