622 lines
24 KiB
Python
622 lines
24 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2014-2018 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 re
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from types import FunctionType
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import weakref
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from inspect import signature
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from itertools import chain
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from ..i18n import _
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from ..setting import undefined
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from ..error import ConfigError, display_list
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from ..function import Params, ParamContext, ParamOption, ParamIndex
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from .dynsymlinkoption import DynSymLinkOption
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STATIC_TUPLE = frozenset()
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submulti = 2
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NAME_REGEXP = re.compile(r'^[a-zA-Z][a-zA-Z\d_-]*$')
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def valid_name(name):
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"""an option's name is a str and does not start with 'impl' or 'cfgimpl'
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and name is not a function name"""
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if not isinstance(name, str):
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return False
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return re.match(NAME_REGEXP, name) is not None and \
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not name.startswith('impl_') and \
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not name.startswith('cfgimpl_')
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#____________________________________________________________
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#
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class Base(object):
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"""Base use by all *Option* classes (Option, OptionDescription, SymLinkOption, ...)
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"""
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__slots__ = ('_name',
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'_path',
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'_informations',
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#calcul
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'_subdyn',
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'_requires',
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'_properties',
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'_calc_properties',
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#
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'_consistencies',
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#other
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'_has_dependency',
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'_dependencies',
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'_has_calc_context',
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'__weakref__'
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)
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def __init__(self,
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name,
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doc,
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requires=None,
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properties=None,
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is_multi=False):
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if not valid_name(name):
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raise ValueError(_('invalid name: "{0}" for option').format(name))
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if requires is not None:
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calc_properties, requires = validate_requires_arg(self,
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is_multi,
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requires,
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name)
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else:
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calc_properties = frozenset()
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requires = undefined
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if properties is None:
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properties = frozenset()
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if isinstance(properties, tuple):
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properties = frozenset(properties)
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if is_multi and 'empty' not in properties:
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properties = properties | {'empty'}
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if not isinstance(properties, frozenset):
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raise TypeError(_('invalid properties type {0} for {1},'
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' must be a frozenset').format(type(properties),
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name))
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self.validate_properties(name, calc_properties, properties)
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_setattr = object.__setattr__
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_setattr(self, '_name', name)
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_setattr(self, '_informations', {'doc': doc})
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if calc_properties is not undefined:
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_setattr(self, '_calc_properties', calc_properties)
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if requires is not undefined:
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_setattr(self, '_requires', requires)
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if properties:
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_setattr(self, '_properties', properties)
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def validate_properties(self, name, calc_properties, properties):
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set_forbidden_properties = calc_properties & properties
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if set_forbidden_properties != frozenset():
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raise ValueError(_('conflict: properties already set in requirement {0} for {1}'
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'').format(display_list(list(set_forbidden_properties)),
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name))
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def _get_function_args(self,
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function):
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args = set()
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kwargs = set()
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positional = False
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keyword = False
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for param in signature(function).parameters.values():
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if param.kind == param.VAR_POSITIONAL:
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positional = True
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elif param.kind == param.VAR_KEYWORD:
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keyword = True
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elif param.default is param.empty:
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args.add(param.name)
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else:
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kwargs.add(param.name)
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return args, kwargs, positional, keyword
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def _get_parameters_args(self,
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calculator_params,
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add_value):
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args = set()
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kwargs = set()
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# add value as first argument
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if add_value:
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args.add('value')
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if self.impl_is_dynoptiondescription():
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kwargs.add('suffix')
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if calculator_params:
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for idx in range(len(calculator_params.args)):
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# construct an appropriate name
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args.add('param{}'.format(idx))
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for param in calculator_params.kwargs:
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kwargs.add(param)
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return args, kwargs
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def _build_calculator_params(self,
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calculator,
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calculator_params,
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type_,
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add_value=False):
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"""
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:add_value: add value as first argument for validator
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"""
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if not isinstance(calculator, FunctionType):
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raise ValueError(_('{0} must be a function').format(type_))
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if calculator_params is not None:
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if not isinstance(calculator_params, Params):
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raise ValueError(_('{0}_params must be a params').format(type_))
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for param in chain(calculator_params.args, calculator_params.kwargs.values()):
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if isinstance(param, ParamContext):
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self._has_calc_context = True
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elif isinstance(param, ParamOption):
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param.option._add_dependency(self)
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if type_ == 'validator':
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self._has_dependency = True
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is_multi = self.impl_is_dynoptiondescription() or self.impl_is_multi()
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func_args, func_kwargs, func_positional, func_keyword = self._get_function_args(calculator)
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calculator_args, calculator_kwargs = self._get_parameters_args(calculator_params, add_value)
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# remove knowned kwargs
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common_kwargs = func_kwargs & calculator_kwargs
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func_kwargs -= common_kwargs
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calculator_kwargs -= common_kwargs
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# remove knowned calculator's kwargs in func's args
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common = func_args & calculator_kwargs
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func_args -= common
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calculator_kwargs -= common
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# remove unknown calculator's args in func's args
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for idx in range(min(len(calculator_args), len(func_args))):
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func_args.pop()
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calculator_args.pop()
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# remove unknown calculator's args in func's kwargs
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if is_multi:
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func_kwargs_left = func_kwargs - {'index', 'self'}
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else:
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func_kwargs_left = func_kwargs
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func_kwargs_pop = set()
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for idx in range(min(len(calculator_args), len(func_kwargs_left))):
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func_kwargs_pop.add(func_kwargs_left.pop())
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calculator_args.pop()
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func_kwargs -= func_kwargs_pop
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# func_positional or keyword is True, so assume all args or kwargs are satisfy
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if func_positional:
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calculator_args = set()
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if func_keyword:
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calculator_kwargs = set()
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if calculator_args or calculator_kwargs:
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# there is more args/kwargs than expected!
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raise ConfigError(_('cannot find those arguments "{}" in function "{}" for "{}"'
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'').format(display_list(list(calculator_args | calculator_kwargs)),
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calculator.__name__,
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self.impl_get_display_name()))
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has_index = False
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if is_multi and func_args and not self.impl_is_dynoptiondescription():
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if calculator_params is None:
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calculator_params = Params()
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params = list(calculator_params.args)
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if add_value:
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# only for validator
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params.append(ParamOption(self))
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func_args.pop()
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if func_args:
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has_index = True
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params.append(ParamIndex())
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func_args.pop()
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calculator_params.args = tuple(params)
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if func_args:
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raise ConfigError(_('missing those arguments "{}" in function "{}" for "{}"'
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'').format(display_list(list(func_args)),
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calculator.__name__,
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self.impl_get_display_name()))
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if not self.impl_is_dynoptiondescription() and is_multi and \
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not has_index and 'index' in func_kwargs:
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calculator_params.kwargs['index'] = ParamIndex()
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return calculator_params
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def impl_has_dependency(self,
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self_is_dep=True):
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if self_is_dep is True:
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#if self.impl_is_master_slaves():
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# return True
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return getattr(self, '_has_dependency', False)
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else:
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return hasattr(self, '_dependencies')
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def _get_dependencies(self,
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context):
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if context:
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od = context.cfgimpl_get_description()
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ret = set(getattr(self, '_dependencies', STATIC_TUPLE))
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if context and hasattr(od, '_dependencies'):
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return set(od._dependencies) | ret
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else:
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return ret
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def _add_dependency(self,
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option):
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options = self._get_dependencies(None)
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options.add(weakref.ref(option))
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self._dependencies = tuple(options)
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def _impl_set_callback(self,
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callback,
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callback_params=None):
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if callback is None and callback_params is not None:
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raise ValueError(_("params defined for a callback function but "
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"no callback defined"
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' yet for option "{0}"').format(
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self.impl_getname()))
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self._validate_calculator(callback,
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callback_params)
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if callback is not None:
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callback_params = self._build_calculator_params(callback,
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callback_params,
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'callback')
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# first part is validator
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val = getattr(self, '_val_call', (None,))[0]
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if not callback_params:
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val_call = (callback,)
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else:
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val_call = (callback, callback_params)
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self._val_call = (val, val_call)
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def impl_is_optiondescription(self):
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return False
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def impl_is_dynoptiondescription(self):
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return False
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def impl_getname(self):
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return self._name
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def impl_is_readonly(self):
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return not isinstance(getattr(self, '_informations', dict()), dict)
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def impl_getproperties(self):
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return getattr(self, '_properties', frozenset())
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def _set_readonly(self):
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if not self.impl_is_readonly():
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_setattr = object.__setattr__
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dico = self._informations
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keys = tuple(dico.keys())
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if len(keys) == 1:
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dico = dico['doc']
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else:
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dico = tuple([keys, tuple(dico.values())])
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_setattr(self, '_informations', dico)
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extra = getattr(self, '_extra', None)
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if extra is not None:
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_setattr(self, '_extra', tuple([tuple(extra.keys()), tuple(extra.values())]))
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def _setsubdyn(self,
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subdyn):
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self._subdyn = weakref.ref(subdyn)
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def issubdyn(self):
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return getattr(self, '_subdyn', None) is not None
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def getsubdyn(self):
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return self._subdyn()
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def impl_getrequires(self):
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return getattr(self, '_requires', STATIC_TUPLE)
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def impl_get_callback(self):
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call = getattr(self, '_val_call', (None, None))[1]
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if call is None:
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ret_call = (None, None)
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elif len(call) == 1:
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ret_call = (call[0], None)
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else:
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ret_call = call
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return ret_call
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# ____________________________________________________________
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# information
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def impl_get_information(self,
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key,
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default=undefined):
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"""retrieves one information's item
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:param key: the item string (ex: "help")
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"""
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def _is_string(infos):
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return isinstance(infos, str)
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dico = self._informations
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if isinstance(dico, tuple):
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if key in dico[0]:
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return dico[1][dico[0].index(key)]
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elif _is_string(dico):
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if key == 'doc':
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return dico
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elif isinstance(dico, dict):
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if key in dico:
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return dico[key]
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if default is not undefined:
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return default
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raise ValueError(_("information's item not found: {0}").format(
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key))
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def impl_set_information(self,
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key,
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value):
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"""updates the information's attribute
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(which is a dictionary)
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:param key: information's key (ex: "help", "doc"
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:param value: information's value (ex: "the help string")
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"""
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if self.impl_is_readonly():
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raise AttributeError(_("'{0}' ({1}) object attribute '{2}' is"
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" read-only").format(self.__class__.__name__,
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self,
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#self.impl_getname(),
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key))
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self._informations[key] = value
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class BaseOption(Base):
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"""This abstract base class stands for attribute access
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in options that have to be set only once, it is of course done in the
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__setattr__ method
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"""
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__slots__ = tuple()
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def __getstate__(self):
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raise NotImplementedError()
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def __setattr__(self,
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name,
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value):
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"""set once and only once some attributes in the option,
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like `_name`. `_name` cannot be changed one the option and
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pushed in the :class:`tiramisu.option.OptionDescription`.
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if the attribute `_readonly` is set to `True`, the option is
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"frozen" (which has noting to do with the high level "freeze"
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propertie or "read_only" property)
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"""
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if name != '_option' and \
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not isinstance(value, tuple):
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is_readonly = False
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# never change _name dans _opt
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if name == '_name':
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if self.impl_getname() is not None:
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#so _name is already set
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is_readonly = True
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elif name != '_readonly':
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is_readonly = self.impl_is_readonly()
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if is_readonly and (name != '_path' or value != getattr(self, '_path', value)):
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raise AttributeError(_('"{}" ({}) object attribute "{}" is'
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' read-only').format(self.__class__.__name__,
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self.impl_get_display_name(),
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name))
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super(BaseOption, self).__setattr__(name, value)
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def impl_getpath(self):
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return self._path
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def impl_has_callback(self):
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"to know if a callback has been defined or not"
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return self.impl_get_callback()[0] is not None
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def _impl_valid_string(self,
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value):
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if not isinstance(value, str):
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raise ValueError(_('invalid string'))
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def impl_get_display_name(self,
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dyn_name=None):
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name = self.impl_get_information('doc')
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if name is None or name == '':
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if dyn_name is not None:
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name = dyn_name
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else:
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name = self.impl_getname()
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return name
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def reset_cache(self,
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path,
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values,
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settings,
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resetted_opts):
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settings._p_.delcache(path)
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settings._pp_.delcache(path)
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if not self.impl_is_optiondescription():
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values._p_.delcache(path)
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def impl_is_symlinkoption(self):
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return False
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def to_dynoption(self,
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rootpath: str,
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suffix: str) -> DynSymLinkOption:
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return DynSymLinkOption(self,
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rootpath,
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suffix)
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def validate_requires_arg(new_option,
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multi,
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requires,
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name):
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"""check malformed requirements
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and tranform dict to internal tuple
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:param requires: have a look at the
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:meth:`tiramisu.setting.Settings.apply_requires` method to
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know more about
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the description of the requires dictionary
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"""
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def get_option(require):
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option = require['option']
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if option == 'self':
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option = new_option
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if not isinstance(option, BaseOption):
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raise ValueError(_('malformed requirements '
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'must be an option in option {0}').format(name))
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if not multi and option.impl_is_multi():
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raise ValueError(_('malformed requirements '
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'multi option must not set '
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'as requires of non multi option {0}').format(name))
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option._add_dependency(new_option)
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return option
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def _set_expected(action,
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inverse,
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transitive,
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same_action,
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option,
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expected,
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operator):
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if inverse not in ret_requires[action]:
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ret_requires[action][inverse] = ([(option, [expected])], action, inverse, transitive, same_action, operator)
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else:
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for exp in ret_requires[action][inverse][0]:
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if exp[0] == option:
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exp[1].append(expected)
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break
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else:
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ret_requires[action][inverse][0].append((option, [expected]))
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def set_expected(require,
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ret_requires):
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expected = require['expected']
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inverse = get_inverse(require)
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transitive = get_transitive(require)
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same_action = get_sameaction(require)
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operator = get_operator(require)
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if isinstance(expected, list):
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for exp in expected:
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if set(exp.keys()) != {'option', 'value'}:
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raise ValueError(_('malformed requirements expected must have '
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'option and value for option {0}').format(name))
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option = get_option(exp)
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if option is not None:
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try:
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option._validate(exp['value'], undefined)
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except ValueError as err:
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raise ValueError(_('malformed requirements expected value '
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'must be valid for option {0}'
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': {1}').format(name, err))
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_set_expected(action,
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inverse,
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transitive,
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same_action,
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option,
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exp['value'],
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operator)
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else:
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option = get_option(require)
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if expected is not None:
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try:
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option._validate(expected, undefined)
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except ValueError as err:
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raise ValueError(_('malformed requirements expected value '
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'must be valid for option {0}'
|
|
': {1}').format(name, err))
|
|
_set_expected(action,
|
|
inverse,
|
|
transitive,
|
|
same_action,
|
|
option,
|
|
expected,
|
|
operator)
|
|
|
|
def get_action(require):
|
|
action = require['action']
|
|
if action == 'force_store_value':
|
|
raise ValueError(_("malformed requirements for option: {0}"
|
|
" action cannot be force_store_value"
|
|
).format(name))
|
|
return action
|
|
|
|
def get_inverse(require):
|
|
inverse = require.get('inverse', False)
|
|
if inverse not in [True, False]:
|
|
raise ValueError(_('malformed requirements for option: {0}'
|
|
' inverse must be boolean'))
|
|
return inverse
|
|
|
|
def get_transitive(require):
|
|
transitive = require.get('transitive', True)
|
|
if transitive not in [True, False]:
|
|
raise ValueError(_('malformed requirements for option: {0}'
|
|
' transitive must be boolean'))
|
|
return transitive
|
|
|
|
def get_sameaction(require):
|
|
same_action = require.get('same_action', True)
|
|
if same_action not in [True, False]:
|
|
raise ValueError(_('malformed requirements for option: {0}'
|
|
' same_action must be boolean'))
|
|
return same_action
|
|
|
|
def get_operator(require):
|
|
operator = require.get('operator', 'or')
|
|
if operator not in ['and', 'or']:
|
|
raise ValueError(_('malformed requirements for option: "{0}"'
|
|
' operator must be "or" or "and"').format(operator))
|
|
return operator
|
|
|
|
|
|
ret_requires = {}
|
|
config_action = set()
|
|
|
|
# start parsing all requires given by user (has dict)
|
|
# transforme it to a tuple
|
|
for require in requires:
|
|
if not isinstance(require, dict):
|
|
raise ValueError(_("malformed requirements type for option:"
|
|
" {0}, must be a dict").format(name))
|
|
valid_keys = ('option', 'expected', 'action', 'inverse', 'transitive',
|
|
'same_action', 'operator')
|
|
unknown_keys = frozenset(require.keys()) - frozenset(valid_keys)
|
|
if unknown_keys != frozenset():
|
|
raise ValueError(_('malformed requirements for option: {0}'
|
|
' unknown keys {1}, must only '
|
|
'{2}').format(name,
|
|
unknown_keys,
|
|
valid_keys))
|
|
# prepare all attributes
|
|
if not ('expected' in require and isinstance(require['expected'], list)) and \
|
|
not ('option' in require and 'expected' in require) or \
|
|
'action' not in require:
|
|
raise ValueError(_("malformed requirements for option: {0}"
|
|
" require must have option, expected and"
|
|
" action keys").format(name))
|
|
action = get_action(require)
|
|
config_action.add(action)
|
|
if action not in ret_requires:
|
|
ret_requires[action] = {}
|
|
set_expected(require, ret_requires)
|
|
|
|
# transform dict to tuple
|
|
ret = []
|
|
for requires in ret_requires.values():
|
|
ret_action = []
|
|
for require in requires.values():
|
|
ret_action.append((tuple(require[0]), require[1],
|
|
require[2], require[3], require[4], require[5]))
|
|
ret.append(tuple(ret_action))
|
|
return frozenset(config_action), tuple(ret)
|