766 lines
29 KiB
Python
766 lines
29 KiB
Python
# -*- coding: utf-8 -*-
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"sets the options of the configuration objects Config object itself"
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# Copyright (C) 2012-2019 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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from itertools import chain
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from .error import PropertiesOptionError, ConstError, ConfigError, LeadershipError, display_list
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from .i18n import _
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"""If cache and expire is enable, time before cache is expired.
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This delay start first time value/setting is set in cache, even if
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user access several time to value/setting
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"""
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EXPIRATION_TIME = 5
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"""List of default properties (you can add new one if needed).
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For common properties and personalise properties, if a propery is set for
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an Option and for the Config together, Setting raise a PropertiesOptionError
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* Common properties:
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hidden
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option with this property can only get value in read only mode. This
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option is not available in read write mode.
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disabled
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option with this property cannot be set/get
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frozen
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cannot set value for option with this properties if 'frozen' is set in
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config
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* Special property:
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permissive
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option with 'permissive' cannot raise PropertiesOptionError for properties
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set in permissive
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config with 'permissive', whole option in this config cannot raise
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PropertiesOptionError for properties set in permissive
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mandatory
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should set value for option with this properties if 'mandatory' is set in
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config
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empty
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raise mandatory PropertiesOptionError if multi or leader have empty value
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unique
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raise ValueError if a value is set twice or more in a multi Option
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* Special Config properties:
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cache
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if set, enable cache settings and values
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expire
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if set, settings and values in cache expire after ``expiration_time``
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everything_frozen
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whole option in config are frozen (even if option have not frozen
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property)
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validator
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launch validator set by user in option (this property has no effect
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for internal validator)
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warnings
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display warnings during validation
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demoting_error_warning
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all value errors are convert to warning (ValueErrorWarning)
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"""
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DEFAULT_PROPERTIES = frozenset(['cache', 'validator', 'warnings'])
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SPECIAL_PROPERTIES = {'frozen', 'mandatory', 'empty', 'force_store_value'}
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"""Config can be in two defaut mode:
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read_only
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you can get all variables not disabled but you cannot set any variables
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if a value has a callback without any value, callback is launch and value
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of this variable can change
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you cannot access to mandatory variable without values
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read_write
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you can get all variables not disabled and not hidden
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you can set all variables not frozen
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"""
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RO_APPEND = frozenset(['frozen', 'disabled', 'validator', 'everything_frozen',
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'mandatory', 'empty', 'force_store_value'])
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RO_REMOVE = frozenset(['permissive', 'hidden'])
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RW_APPEND = frozenset(['frozen', 'disabled', 'validator', 'hidden',
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'force_store_value'])
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RW_REMOVE = frozenset(['permissive', 'everything_frozen', 'mandatory',
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'empty'])
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FORBIDDEN_SET_PROPERTIES = frozenset(['force_store_value'])
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FORBIDDEN_SET_PERMISSIVES = frozenset(['force_default_on_freeze',
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'force_metaconfig_on_freeze',
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'force_store_value'])
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ALLOWED_LEADER_PROPERTIES = frozenset(['empty',
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'unique',
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'force_store_value',
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'mandatory',
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'force_default_on_freeze',
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'force_metaconfig_on_freeze',
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'frozen'])
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static_set = frozenset()
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class OptionBag:
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__slots__ = ('option', # current option
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'path',
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'index',
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'config_bag',
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'ori_option', # original option (for example useful for symlinkoption)
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'properties', # properties of current option
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'properties_setted',
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'apply_requires', # apply requires or not for this option
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)
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def __init__(self):
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self.option = None
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def set_option(self,
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option,
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path,
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index,
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config_bag):
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if path is None:
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path = option.impl_getpath()
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self.path = path
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self.index = index
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self.option = option
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self.config_bag = config_bag
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def __getattr__(self, key):
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if key == 'properties':
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settings = self.config_bag.context.cfgimpl_get_settings()
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self.properties = settings.getproperties(self,
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apply_requires=self.apply_requires)
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return self.properties
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elif key == 'ori_option':
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return self.option
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elif key == 'apply_requires':
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return True
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elif key == 'properties_setted':
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return False
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raise KeyError('unknown key {} for OptionBag'.format(key)) # pragma: no cover
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def __setattr__(self, key, val):
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super().__setattr__(key, val)
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if key == 'properties':
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self.properties_setted = True
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def __delattr__(self, key):
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if key in ['properties', 'permissives']:
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try:
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super().__delattr__(key)
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except AttributeError:
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pass
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return
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raise KeyError('unknown key {} for ConfigBag'.format(key)) # pragma: no cover
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def copy(self):
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option_bag = OptionBag()
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for key in self.__slots__:
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if key == 'properties' and self.config_bag is undefined:
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continue
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if hasattr(self, key):
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setattr(option_bag, key, getattr(self, key))
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return option_bag
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class ConfigBag:
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__slots__ = ('context', # link to the current context
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'properties', # properties for current context
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'true_properties', # properties for current context
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'is_unrestraint',
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'permissives', # permissives for current context
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'expiration_time' # EXPIRATION_TIME
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)
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def __init__(self, context, **kwargs):
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self.context = context
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for key, value in kwargs.items():
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setattr(self, key, value)
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def __getattr__(self, key):
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if key == 'properties':
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settings = self.context.cfgimpl_get_settings()
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self.properties = settings.get_context_properties(self.context._impl_properties_cache)
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return self.properties
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if key == 'permissives':
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settings = self.context.cfgimpl_get_settings()
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self.permissives = settings.get_context_permissives()
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return self.permissives
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if key == 'true_properties':
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return self.properties
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if key == 'expiration_time':
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self.expiration_time = EXPIRATION_TIME
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return self.expiration_time
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if key == 'is_unrestraint':
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return False
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raise KeyError('unknown key {} for ConfigBag'.format(key)) # pragma: no cover
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def remove_warnings(self):
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self.properties = frozenset(self.properties - {'warnings'})
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def remove_validation(self):
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self.properties = frozenset(self.properties - {'validator'})
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def unrestraint(self):
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self.is_unrestraint = True
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self.true_properties = self.properties
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self.properties = frozenset(['cache'])
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def set_permissive(self):
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self.properties = frozenset(self.properties | {'permissive'})
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def __delattr__(self, key):
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if key in ['properties', 'permissives']:
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try:
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super().__delattr__(key)
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except AttributeError:
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pass
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return
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raise KeyError('unknown key {} for ConfigBag'.format(key)) # pragma: no cover
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def copy(self):
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kwargs = {}
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for key in self.__slots__:
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if key in ['properties', 'permissives', 'true_properties'] and \
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not hasattr(self.context, '_impl_settings'):
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# not for GroupConfig
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continue
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kwargs[key] = getattr(self, key)
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return ConfigBag(**kwargs)
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# ____________________________________________________________
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class _NameSpace(object):
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"""convenient class that emulates a module
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and builds constants (that is, unique names)
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when attribute is added, we cannot delete it
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"""
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def __setattr__(self,
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name,
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value):
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if name in self.__dict__:
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raise ConstError(_("can't rebind {0}").format(name))
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self.__dict__[name] = value
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def __delattr__(self,
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name):
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raise ConstError(_("can't unbind {0}").format(name))
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class GroupModule(_NameSpace):
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"emulates a module to manage unique group (OptionDescription) names"
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class GroupType(str):
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"""allowed normal group (OptionDescription) names
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*normal* means : groups that are not leader
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"""
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pass
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class DefaultGroupType(GroupType):
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"""groups that are default (typically 'default')"""
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pass
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class LeadershipGroupType(GroupType):
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"""allowed normal group (OptionDescription) names
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*leadership* means : groups that have the 'leadership' attribute set
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"""
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pass
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class RootGroupType(GroupType):
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"""root means this is the root optiondescription of whole config
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"""
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pass
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def addgroup(self, name):
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setattr(groups, name, groups.GroupType(name))
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class OwnerModule(_NameSpace):
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"""emulates a module to manage unique owner names.
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owners are living in `Config._cfgimpl_value_owners`
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"""
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class Owner(str):
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"""allowed owner names
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"""
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pass
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class DefaultOwner(Owner):
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"""groups that are default (typically 'default')"""
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pass
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def addowner(self, name):
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"""
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:param name: the name of the new owner
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"""
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setattr(owners, name, owners.Owner(name))
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# ____________________________________________________________
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# populate groups
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groups = GroupModule()
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"""groups.default
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default group set when creating a new optiondescription"""
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groups.default = groups.DefaultGroupType('default')
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"""groups.leadership
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leadership group is a special optiondescription, all suboptions should
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be multi option and all values should have same length, to find
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leader's option, the optiondescription's name should be same than de
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leader's option"""
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groups.leadership = groups.LeadershipGroupType('leadership')
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""" groups.root
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this group is the root optiondescription of whole config"""
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groups.root = groups.RootGroupType('root')
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# ____________________________________________________________
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# populate owners with default attributes
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owners = OwnerModule()
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"""default
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is the config owner after init time"""
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owners.default = owners.DefaultOwner('default')
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"""user
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is the generic is the generic owner"""
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owners.user = owners.Owner('user')
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"""forced
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special owner when value is forced"""
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owners.forced = owners.Owner('forced')
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forbidden_owners = (owners.default, owners.forced)
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# ____________________________________________________________
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class Undefined(object):
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def __str__(self): # pragma: no cover
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return 'Undefined'
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__repr__ = __str__
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undefined = Undefined()
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# ____________________________________________________________
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class Settings(object):
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"``config.Config()``'s configuration options settings"
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__slots__ = ('_p_',
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'_pp_',
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'__weakref__',
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'ro_append',
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'ro_remove',
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'rw_append',
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'rw_remove',
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'default_properties')
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def __init__(self,
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properties,
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permissives):
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"""
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initializer
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:param context: the root config
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:param storage: the storage type
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- dictionary -> in memory
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- sqlite3 -> persistent
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"""
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# generic owner
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self._p_ = properties
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self._pp_ = permissives
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self.default_properties = DEFAULT_PROPERTIES
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self.ro_append = RO_APPEND
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self.ro_remove = RO_REMOVE
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self.rw_append = RW_APPEND
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self.rw_remove = RW_REMOVE
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# ____________________________________________________________
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# get properties and permissive methods
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def get_context_properties(self,
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cache):
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is_cached, props, validated = cache.getcache(None,
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None,
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None,
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{},
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{},
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'context_props')
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if not is_cached:
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props = self._p_.getproperties(None,
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None,
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self.default_properties)
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cache.setcache(None,
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None,
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props,
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{},
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props,
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True)
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return props
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def getproperties(self,
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option_bag,
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apply_requires=True):
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"""
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"""
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option = option_bag.option
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config_bag = option_bag.config_bag
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if option.impl_is_symlinkoption():
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option = option.impl_getopt()
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path = option.impl_getpath()
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index = option_bag.index
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if apply_requires:
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cache = config_bag.context._impl_properties_cache
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config_bag_props = config_bag.properties
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is_cached, props, validated = cache.getcache(path,
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config_bag.expiration_time,
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index,
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config_bag_props,
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{},
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'self_props')
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else:
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is_cached = False
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if not is_cached:
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props = set()
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p_props = self._p_.getproperties(path,
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None,
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option.impl_getproperties())
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if index is not None:
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p_props = chain(p_props,
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self._p_.getproperties(path,
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index,
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option.impl_getproperties()))
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for prop in p_props:
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if isinstance(prop, str):
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props.add(prop)
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elif apply_requires:
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new_prop = prop.execute(option_bag,
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leadership_must_have_index=True)
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if new_prop is None:
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continue
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elif not isinstance(new_prop, str):
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raise ValueError(_('invalid property type {} for {} with {} function').format(type(new_prop),
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option_bag.option.impl_getname(),
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prop.function.__name__))
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if not option.impl_is_optiondescription() and option.impl_is_leader() and new_prop not in ALLOWED_LEADER_PROPERTIES:
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raise LeadershipError(_('leader cannot have "{}" property').format(new_prop))
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props.add(new_prop)
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props -= self.getpermissives(option_bag)
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if apply_requires and not config_bag.is_unrestraint:
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cache.setcache(path,
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index,
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props,
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props,
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config_bag.properties,
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True)
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return props
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def get_calculated_properties(self,
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option_bag):
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option = option_bag.option
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if option.impl_is_symlinkoption():
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option = option.impl_getopt()
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path = option.impl_getpath()
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p_props = self._p_.getproperties(path,
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None,
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option.impl_getproperties())
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if option_bag.index is not None:
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p_props = chain(p_props,
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self._p_.getproperties(path,
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option_bag.index,
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option.impl_getproperties()))
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for prop in p_props:
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if not isinstance(prop, str):
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yield prop
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def has_properties_index(self,
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option_bag):
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option = option_bag.option
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if option.impl_is_symlinkoption():
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option = option.impl_getopt()
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path = option.impl_getpath()
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p_props = self._p_.getproperties(path,
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None,
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option.impl_getproperties())
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if option_bag.index is not None:
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p_props = chain(p_props,
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self._p_.getproperties(path,
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option_bag.index,
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option.impl_getproperties()))
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for prop in p_props:
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if not isinstance(prop, str) and prop.has_index(option_bag.option):
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return True
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return False
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|
|
def get_context_permissives(self):
|
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return self.getpermissives(None)
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|
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def getpermissives(self,
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option_bag):
|
|
if option_bag is None:
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path = None
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index = None
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else:
|
|
opt = option_bag.option
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if opt.impl_is_symlinkoption():
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opt = opt.impl_getopt()
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path = opt.impl_getpath()
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else:
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path = option_bag.path
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index = option_bag.index
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permissives = self._pp_.getpermissives(path, None)
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if index is not None:
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permissives = frozenset(self._pp_.getpermissives(path, index) | permissives)
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return permissives
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|
|
#____________________________________________________________
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|
# set methods
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|
def set_context_properties(self,
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properties,
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context):
|
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self._p_.setproperties(None,
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None,
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properties)
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context.cfgimpl_reset_cache(None)
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|
|
def setproperties(self,
|
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path,
|
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properties,
|
|
option_bag,
|
|
context):
|
|
"""save properties for specified path
|
|
(never save properties if same has option properties)
|
|
"""
|
|
opt = option_bag.option
|
|
if opt.impl_is_symlinkoption():
|
|
raise TypeError(_("can't assign property to the symlinkoption \"{}\""
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|
"").format(opt.impl_get_display_name()))
|
|
if not opt.impl_is_optiondescription() and opt.impl_is_leader():
|
|
not_allowed_properties = properties - ALLOWED_LEADER_PROPERTIES
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|
if not_allowed_properties:
|
|
if len(not_allowed_properties) == 1:
|
|
raise LeadershipError(_('leader cannot have "{}" property').format(list(not_allowed_properties)[0]))
|
|
else:
|
|
raise LeadershipError(_('leader cannot have {} properties').format(display_list(list(not_allowed_properties), add_quote=True)))
|
|
if ('force_default_on_freeze' in properties or 'force_metaconfig_on_freeze' in properties) and \
|
|
'frozen' not in properties:
|
|
raise LeadershipError(_('a leader ({0}) cannot have '
|
|
'"force_default_on_freeze" or "force_metaconfig_on_freeze" property without "frozen"'
|
|
'').format(opt.impl_get_display_name()))
|
|
self._p_.setproperties(path,
|
|
option_bag.index,
|
|
properties)
|
|
# values too because of follower values could have a PropertiesOptionError has value
|
|
context.cfgimpl_reset_cache(option_bag)
|
|
del option_bag.properties
|
|
|
|
def set_context_permissives(self,
|
|
permissives):
|
|
self.setpermissives(None,
|
|
permissives)
|
|
|
|
def setpermissives(self,
|
|
option_bag,
|
|
permissives):
|
|
"""
|
|
enables us to put the permissives in the storage
|
|
|
|
:param path: the option's path
|
|
:param type: str
|
|
:param opt: if an option object is set, the path is extracted.
|
|
it is better (faster) to set the path parameter
|
|
instead of passing a :class:`tiramisu.option.Option()` object.
|
|
"""
|
|
if not isinstance(permissives, frozenset):
|
|
raise TypeError(_('permissive must be a frozenset'))
|
|
if option_bag is not None:
|
|
opt = option_bag.option
|
|
if opt and opt.impl_is_symlinkoption():
|
|
raise TypeError(_("can't assign permissive to the symlinkoption \"{}\""
|
|
"").format(opt.impl_get_display_name()))
|
|
path = option_bag.path
|
|
index = option_bag.index
|
|
else:
|
|
path = None
|
|
index = None
|
|
forbidden_permissives = FORBIDDEN_SET_PERMISSIVES & permissives
|
|
if forbidden_permissives:
|
|
raise ConfigError(_('cannot add those permissives: {0}').format(
|
|
' '.join(forbidden_permissives)))
|
|
self._pp_.setpermissives(path, index, permissives)
|
|
if option_bag is not None:
|
|
option_bag.config_bag.context.cfgimpl_reset_cache(option_bag)
|
|
|
|
#____________________________________________________________
|
|
# reset methods
|
|
|
|
def reset(self,
|
|
option_bag,
|
|
context):
|
|
if option_bag is None:
|
|
opt = None
|
|
path = None
|
|
index = None
|
|
else:
|
|
opt = option_bag.option
|
|
assert not opt.impl_is_symlinkoption(), _("can't reset properties to "
|
|
"the symlinkoption \"{}\""
|
|
"").format(opt.impl_get_display_name())
|
|
path = option_bag.path
|
|
index = option_bag.index
|
|
self._p_.delproperties(path, index)
|
|
context.cfgimpl_reset_cache(option_bag)
|
|
|
|
def reset_permissives(self,
|
|
option_bag,
|
|
context):
|
|
if option_bag is None:
|
|
opt = None
|
|
path = None
|
|
index = None
|
|
else:
|
|
opt = option_bag.option
|
|
assert not opt.impl_is_symlinkoption(), _("can't reset permissives to "
|
|
"the symlinkoption \"{}\""
|
|
"").format(opt.impl_get_display_name())
|
|
index = option_bag.index
|
|
path = option_bag.path
|
|
self._pp_.delpermissive(path, index)
|
|
context.cfgimpl_reset_cache(option_bag)
|
|
|
|
#____________________________________________________________
|
|
# validate properties
|
|
def calc_raises_properties(self,
|
|
option_bag,
|
|
apply_requires=True):
|
|
if apply_requires and option_bag.properties_setted:
|
|
option_properties = option_bag.properties
|
|
else:
|
|
option_properties = self.getproperties(option_bag,
|
|
apply_requires=apply_requires)
|
|
return self._calc_raises_properties(option_bag.config_bag.properties,
|
|
option_bag.config_bag.permissives,
|
|
option_properties)
|
|
|
|
def _calc_raises_properties(self,
|
|
context_properties,
|
|
context_permissives,
|
|
option_properties):
|
|
raises_properties = context_properties - SPECIAL_PROPERTIES
|
|
# remove global permissive properties
|
|
if raises_properties and ('permissive' in raises_properties):
|
|
raises_properties -= context_permissives
|
|
properties = option_properties & raises_properties
|
|
# at this point an option should not remain in properties
|
|
return properties
|
|
|
|
def validate_properties(self,
|
|
option_bag):
|
|
"""
|
|
validation upon the properties related to `opt`
|
|
|
|
:param opt: an option or an option description object
|
|
:param force_permissive: behaves as if the permissive property
|
|
was present
|
|
"""
|
|
config_bag = option_bag.config_bag
|
|
if not config_bag.properties or config_bag.properties == frozenset(['cache']): # pragma: no cover
|
|
return
|
|
properties = self.calc_raises_properties(option_bag)
|
|
if properties != frozenset():
|
|
raise PropertiesOptionError(option_bag,
|
|
properties,
|
|
self)
|
|
|
|
def validate_mandatory(self,
|
|
value,
|
|
option_bag):
|
|
if 'mandatory' in option_bag.config_bag.properties:
|
|
values = option_bag.config_bag.context.cfgimpl_get_values()
|
|
if not ('permissive' in option_bag.config_bag.properties and
|
|
'mandatory' in option_bag.config_bag.permissives) and \
|
|
'mandatory' in option_bag.properties and values.isempty(option_bag.option,
|
|
value,
|
|
index=option_bag.index):
|
|
raise PropertiesOptionError(option_bag,
|
|
['mandatory'],
|
|
self)
|
|
if 'empty' in option_bag.properties and values.isempty(option_bag.option,
|
|
value,
|
|
force_allow_empty_list=True,
|
|
index=option_bag.index):
|
|
raise PropertiesOptionError(option_bag,
|
|
['empty'],
|
|
self)
|
|
|
|
def validate_frozen(self,
|
|
option_bag):
|
|
if option_bag.config_bag.properties and \
|
|
('everything_frozen' in option_bag.config_bag.properties or
|
|
('frozen' in option_bag.config_bag.properties and 'frozen' in option_bag.properties)) and \
|
|
not (('permissive' in option_bag.config_bag.properties) and
|
|
'frozen' in option_bag.config_bag.permissives):
|
|
raise PropertiesOptionError(option_bag,
|
|
['frozen'],
|
|
self)
|
|
return False
|
|
#____________________________________________________________
|
|
# read only/read write
|
|
|
|
def _read(self,
|
|
remove,
|
|
append,
|
|
context):
|
|
props = self._p_.getproperties(None,
|
|
None,
|
|
self.default_properties)
|
|
modified = False
|
|
if remove & props:
|
|
props = props - remove
|
|
modified = True
|
|
if append & props != append:
|
|
props = props | append
|
|
modified = True
|
|
if modified:
|
|
self.set_context_properties(frozenset(props),
|
|
context)
|
|
|
|
def read_only(self,
|
|
context):
|
|
"convenience method to freeze, hide and disable"
|
|
self._read(self.ro_remove,
|
|
self.ro_append,
|
|
context)
|
|
|
|
def read_write(self,
|
|
context):
|
|
"convenience method to freeze, hide and disable"
|
|
self._read(self.rw_remove,
|
|
self.rw_append,
|
|
context)
|