tiramisu/config.py

   1 # -*- coding: utf-8 -*-
   2 "options handler global entry point"
   3 # Copyright (C) 2012-2013 Team tiramisu (see AUTHORS for all contributors)
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 #
  19 # The original `Config` design model is unproudly borrowed from
  20 # the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
  21 # the whole pypy projet is under MIT licence
  22 # ____________________________________________________________
  23 from time import time
  24 from tiramisu.error import PropertiesOptionError, ConfigError
  25 from tiramisu.option import OptionDescription, Option, SymLinkOption, \
  26     BaseInformation
  27 from tiramisu.setting import groups, Settings, default_encoding, storage_type
  28 from tiramisu.value import Values
  29 from tiramisu.i18n import _
  30
  31
  32 def gen_id(config):
  33     return str(id(config)) + str(time())
  34
  35
  36 class SubConfig(BaseInformation):
  37     "sub configuration management entry"
  38     __slots__ = ('_impl_context', '_impl_descr', '_impl_path')
  39
  40     def __init__(self, descr, context, subpath=None):
  41         """ Configuration option management master class
  42
  43         :param descr: describes the configuration schema
  44         :type descr: an instance of ``option.OptionDescription``
  45         :param context: the current root config
  46         :type context: `Config`
  47         :type subpath: `str` with the path name
  48         """
  49         # main option description
  50         if not isinstance(descr, OptionDescription):
  51             raise ValueError(_('descr must be an optiondescription, not {0}'
  52                                ).format(type(descr)))
  53         self._impl_descr = descr
  54         # sub option descriptions
  55         if not isinstance(context, SubConfig):
  56             raise ValueError('context must be a SubConfig')
  57         self._impl_context = context
  58         self._impl_path = subpath
  59
  60     def cfgimpl_reset_cache(self, only_expired=False, only=('values',
  61                                                             'settings')):
  62         self.cfgimpl_get_context().cfgimpl_reset_cache(only_expired, only)
  63
  64     def cfgimpl_get_home_by_path(self, path, force_permissive=False,
  65                                  force_properties=None):
  66         """:returns: tuple (config, name)"""
  67         path = path.split('.')
  68         for step in path[:-1]:
  69             self = self._getattr(step,
  70                                  force_permissive=force_permissive,
  71                                  force_properties=force_properties)
  72         return self, path[-1]
  73
  74     def __hash__(self):
  75         return hash(self.cfgimpl_get_description().impl_getkey(self))
  76
  77     def __eq__(self, other):
  78         "Config's comparison"
  79         if not isinstance(other, Config):
  80             return False
  81         return self.cfgimpl_get_description().impl_getkey(self) == \
  82             other.cfgimpl_get_description().impl_getkey(other)
  83
  84     def __ne__(self, other):
  85         "Config's comparison"
  86         if not isinstance(other, Config):
  87             return False
  88         return not self == other
  89
  90     # ______________________________________________________________________
  91     def __iter__(self):
  92         """Pythonesque way of parsing group's ordered options.
  93         iteration only on Options (not OptionDescriptions)"""
  94         for child in self.cfgimpl_get_description().impl_getchildren():
  95             if not isinstance(child, OptionDescription):
  96                 try:
  97                     yield child._name, getattr(self, child._name)
  98                 except GeneratorExit:
  99                     raise StopIteration
 100                 except PropertiesOptionError:
 101                     pass  # option with properties
 102
 103     def iter_all(self):
 104         """A way of parsing options **and** groups.
 105         iteration on Options and OptionDescriptions."""
 106         for child in self.cfgimpl_get_description().impl_getchildren():
 107             try:
 108                 yield child._name, getattr(self, child._name)
 109             except GeneratorExit:
 110                 raise StopIteration
 111             except PropertiesOptionError:
 112                 pass  # option with properties
 113
 114     def iter_groups(self, group_type=None):
 115         """iteration on groups objects only.
 116         All groups are returned if `group_type` is `None`, otherwise the groups
 117         can be filtered by categories (families, or whatever).
 118
 119         :param group_type: if defined, is an instance of `groups.GroupType`
 120                            or `groups.MasterGroupType` that lives in
 121                            `setting.groups`
 122         """
 123         if group_type is not None:
 124             if not isinstance(group_type, groups.GroupType):
 125                 raise TypeError(_("unknown group_type: {0}").format(group_type))
 126         for child in self.cfgimpl_get_description().impl_getchildren():
 127             if isinstance(child, OptionDescription):
 128                 try:
 129                     if group_type is None or (group_type is not None and
 130                                               child.impl_get_group_type()
 131                                               == group_type):
 132                         yield child._name, getattr(self, child._name)
 133                 except GeneratorExit:
 134                     raise StopIteration
 135                 except PropertiesOptionError:
 136                     pass
 137     # ______________________________________________________________________
 138
 139     def __str__(self):
 140         "Config's string representation"
 141         lines = []
 142         for name, grp in self.iter_groups():
 143             lines.append("[{0}]".format(name))
 144         for name, value in self:
 145             try:
 146                 lines.append("{0} = {1}".format(name, value))
 147             except UnicodeEncodeError:
 148                 lines.append("{0} = {1}".format(name,
 149                                                 value.encode(default_encoding)))
 150             except PropertiesOptionError:
 151                 pass
 152         return '\n'.join(lines)
 153
 154     __repr__ = __str__
 155
 156     def cfgimpl_get_context(self):
 157         return self._impl_context
 158
 159     def cfgimpl_get_description(self):
 160         if self._impl_descr is None:
 161             raise ConfigError(_('no option description found for this config'
 162                                 ' (may be metaconfig without meta)'))
 163         else:
 164             return self._impl_descr
 165
 166     def cfgimpl_get_settings(self):
 167         return self.cfgimpl_get_context()._impl_settings
 168
 169     def cfgimpl_get_values(self):
 170         return self.cfgimpl_get_context()._impl_values
 171
 172     # ____________________________________________________________
 173     # attribute methods
 174     def __setattr__(self, name, value):
 175         "attribute notation mechanism for the setting of the value of an option"
 176         if name.startswith('_impl_'):
 177             #self.__dict__[name] = value
 178             object.__setattr__(self, name, value)
 179             return
 180         self._setattr(name, value)
 181
 182     def _setattr(self, name, value, force_permissive=False):
 183         if '.' in name:
 184             homeconfig, name = self.cfgimpl_get_home_by_path(name)
 185             return homeconfig.__setattr__(name, value)
 186         child = getattr(self.cfgimpl_get_description(), name)
 187         if not isinstance(child, SymLinkOption):
 188             if self._impl_path is None:
 189                 path = name
 190             else:
 191                 path = self._impl_path + '.' + name
 192             self.cfgimpl_get_values().setitem(child, value, path,
 193                                               force_permissive=force_permissive)
 194         else:
 195             context = self.cfgimpl_get_context()
 196             path = context.cfgimpl_get_description().impl_get_path_by_opt(
 197                 child._opt)
 198             context._setattr(path, value, force_permissive=force_permissive)
 199
 200     def __delattr__(self, name):
 201         child = getattr(self.cfgimpl_get_description(), name)
 202         self.cfgimpl_get_values().__delitem__(child)
 203
 204     def __getattr__(self, name):
 205         return self._getattr(name)
 206
 207     def _getattr(self, name, force_permissive=False, force_properties=None,
 208                  validate=True):
 209         """
 210         attribute notation mechanism for accessing the value of an option
 211         :param name: attribute name
 212         :return: option's value if name is an option name, OptionDescription
 213                  otherwise
 214         """
 215         # attribute access by passing a path,
 216         # for instance getattr(self, "creole.general.family.adresse_ip_eth0")
 217         if '.' in name:
 218             homeconfig, name = self.cfgimpl_get_home_by_path(
 219                 name, force_permissive=force_permissive,
 220                 force_properties=force_properties)
 221             return homeconfig._getattr(name, force_permissive=force_permissive,
 222                                        force_properties=force_properties,
 223                                        validate=validate)
 224         # special attributes
 225         if name.startswith('_impl_') or name.startswith('cfgimpl_') \
 226                 or name.startswith('impl_'):
 227             # if it were in __dict__ it would have been found already
 228             return object.__getattribute__(self, name)
 229         opt_or_descr = getattr(self.cfgimpl_get_description(), name)
 230         # symlink options
 231         if self._impl_path is None:
 232             subpath = name
 233         else:
 234             subpath = self._impl_path + '.' + name
 235         if isinstance(opt_or_descr, SymLinkOption):
 236             context = self.cfgimpl_get_context()
 237             path = context.cfgimpl_get_description().impl_get_path_by_opt(
 238                 opt_or_descr._opt)
 239             return context._getattr(path, validate=validate,
 240                                     force_properties=force_properties,
 241                                     force_permissive=force_permissive)
 242         elif isinstance(opt_or_descr, OptionDescription):
 243             self.cfgimpl_get_settings().validate_properties(
 244                 opt_or_descr, True, False, path=subpath,
 245                 force_permissive=force_permissive,
 246                 force_properties=force_properties)
 247             return SubConfig(opt_or_descr, self.cfgimpl_get_context(), subpath)
 248         else:
 249             return self.cfgimpl_get_values().getitem(
 250                 opt_or_descr, path=subpath,
 251                 validate=validate,
 252                 force_properties=force_properties,
 253                 force_permissive=force_permissive)
 254
 255     def find(self, bytype=None, byname=None, byvalue=None, type_='option'):
 256         """
 257             finds a list of options recursively in the config
 258
 259             :param bytype: Option class (BoolOption, StrOption, ...)
 260             :param byname: filter by Option._name
 261             :param byvalue: filter by the option's value
 262             :returns: list of matching Option objects
 263         """
 264         return self.cfgimpl_get_context()._find(bytype, byname, byvalue,
 265                                                 first=False,
 266                                                 type_=type_,
 267                                                 _subpath=self.cfgimpl_get_path()
 268                                                 )
 269
 270     def find_first(self, bytype=None, byname=None, byvalue=None,
 271                    type_='option', display_error=True):
 272         """
 273             finds an option recursively in the config
 274
 275             :param bytype: Option class (BoolOption, StrOption, ...)
 276             :param byname: filter by Option._name
 277             :param byvalue: filter by the option's value
 278             :returns: list of matching Option objects
 279         """
 280         return self.cfgimpl_get_context()._find(
 281             bytype, byname, byvalue, first=True, type_=type_,
 282             _subpath=self.cfgimpl_get_path(), display_error=display_error)
 283
 284     def _find(self, bytype, byname, byvalue, first, type_='option',
 285               _subpath=None, check_properties=True, display_error=True):
 286         """
 287         convenience method for finding an option that lives only in the subtree
 288
 289         :param first: return only one option if True, a list otherwise
 290         :return: find list or an exception if nothing has been found
 291         """
 292         def _filter_by_name():
 293             try:
 294                 if byname is None or path == byname or \
 295                         path.endswith('.' + byname):
 296                     return True
 297             except IndexError:
 298                 pass
 299             return False
 300
 301         def _filter_by_value():
 302             if byvalue is None:
 303                 return True
 304             try:
 305                 value = getattr(self, path)
 306                 if value == byvalue:
 307                     return True
 308             except PropertiesOptionError:  # a property is a restriction
 309                                            # upon the access of the value
 310                 pass
 311             return False
 312
 313         def _filter_by_type():
 314             if bytype is None:
 315                 return True
 316             if isinstance(option, bytype):
 317                 return True
 318             return False
 319
 320         #def _filter_by_attrs():
 321         #    if byattrs is None:
 322         #        return True
 323         #    for key, val in byattrs.items():
 324         #        print "----", path, key
 325         #        if path == key or path.endswith('.' + key):
 326         #            if value == val:
 327         #                return True
 328         #            else:
 329         #                return False
 330         #    return False
 331         if type_ not in ('option', 'path', 'context', 'value'):
 332             raise ValueError(_('unknown type_ type {0}'
 333                                'for _find').format(type_))
 334         find_results = []
 335         opts, paths = self.cfgimpl_get_description()._cache_paths
 336         for index in range(0, len(paths)):
 337             option = opts[index]
 338             if isinstance(option, OptionDescription):
 339                 continue
 340             path = paths[index]
 341             if _subpath is not None and not path.startswith(_subpath + '.'):
 342                 continue
 343             if not _filter_by_name():
 344                 continue
 345             if not _filter_by_value():
 346                 continue
 347             #remove option with propertyerror, ...
 348             if check_properties:
 349                 try:
 350                     value = getattr(self, path)
 351                 except PropertiesOptionError:
 352                     # a property restricts the access of the value
 353                     continue
 354             if not _filter_by_type():
 355                 continue
 356             #if not _filter_by_attrs():
 357             #    continue
 358             if type_ == 'value':
 359                 retval = value
 360             elif type_ == 'path':
 361                 retval = path
 362             elif type_ == 'option':
 363                 retval = option
 364             elif type_ == 'context':
 365                 retval = self.cfgimpl_get_context()
 366             if first:
 367                 return retval
 368             else:
 369                 find_results.append(retval)
 370         if find_results == []:
 371             if display_error:
 372                 raise AttributeError(_("no option found in config"
 373                                        " with these criteria"))
 374             else:
 375                 #translation is slow
 376                 raise AttributeError()
 377         else:
 378             return find_results
 379
 380     def make_dict(self, flatten=False, _currpath=None, withoption=None,
 381                   withvalue=None):
 382         """exports the whole config into a `dict`, for example:
 383
 384         >>> print cfg.make_dict()
 385         {'od2.var4': None, 'od2.var5': None, 'od2.var6': None}
 386
 387
 388
 389         :param flatten: returns a dict(name=value) instead of a dict(path=value)
 390                         ::
 391
 392                             >>> print cfg.make_dict(flatten=True)
 393                             {'var5': None, 'var4': None, 'var6': None}
 394
 395         :param withoption: returns the options that are present in the very same
 396                            `OptionDescription` than the `withoption` itself::
 397
 398                                 >>> print cfg.make_dict(withoption='var1')
 399                                 {'od2.var4': None, 'od2.var5': None,
 400                                 'od2.var6': None,
 401                                 'od2.var1': u'value',
 402                                 'od1.var1': None,
 403                                 'od1.var3': None,
 404                                 'od1.var2': None}
 405
 406         :param withvalue: returns the options that have the value `withvalue`
 407                           ::
 408
 409                             >>> print c.make_dict(withoption='var1',
 410                                                   withvalue=u'value')
 411                             {'od2.var4': None,
 412                             'od2.var5': None,
 413                             'od2.var6': None,
 414                             'od2.var1': u'value'}
 415
 416         :returns: dict of Option's name (or path) and values
 417         """
 418         pathsvalues = []
 419         if _currpath is None:
 420             _currpath = []
 421         if withoption is None and withvalue is not None:
 422             raise ValueError(_("make_dict can't filtering with value without "
 423                                "option"))
 424         if withoption is not None:
 425             mypath = self.cfgimpl_get_path()
 426             for path in self.cfgimpl_get_context()._find(bytype=Option,
 427                                                          byname=withoption,
 428                                                          byvalue=withvalue,
 429                                                          first=False,
 430                                                          type_='path',
 431                                                          _subpath=mypath):
 432                 path = '.'.join(path.split('.')[:-1])
 433                 opt = self.cfgimpl_get_context().cfgimpl_get_description(
 434                 ).impl_get_opt_by_path(path)
 435                 if mypath is not None:
 436                     if mypath == path:
 437                         withoption = None
 438                         withvalue = None
 439                         break
 440                     else:
 441                         tmypath = mypath + '.'
 442                         if not path.startswith(tmypath):
 443                             raise AttributeError(_('unexpected path {0}, '
 444                                                    'should start with {1}'
 445                                                    '').format(path, mypath))
 446                         path = path[len(tmypath):]
 447                 self._make_sub_dict(opt, path, pathsvalues, _currpath, flatten)
 448         #withoption can be set to None below !
 449         if withoption is None:
 450             for opt in self.cfgimpl_get_description().impl_getchildren():
 451                 path = opt._name
 452                 self._make_sub_dict(opt, path, pathsvalues, _currpath, flatten)
 453         if _currpath == []:
 454             options = dict(pathsvalues)
 455             return options
 456         return pathsvalues
 457
 458     def _make_sub_dict(self, opt, path, pathsvalues, _currpath, flatten):
 459         if isinstance(opt, OptionDescription):
 460             try:
 461                 pathsvalues += getattr(self, path).make_dict(flatten,
 462                                                              _currpath +
 463                                                              path.split('.'))
 464             except PropertiesOptionError:
 465                 pass  # this just a hidden or disabled option
 466         else:
 467             try:
 468                 value = self._getattr(opt._name)
 469                 if flatten:
 470                     name = opt._name
 471                 else:
 472                     name = '.'.join(_currpath + [opt._name])
 473                 pathsvalues.append((name, value))
 474             except PropertiesOptionError:
 475                 pass  # this just a hidden or disabled option
 476
 477     def cfgimpl_get_path(self):
 478         descr = self.cfgimpl_get_description()
 479         context_descr = self.cfgimpl_get_context().cfgimpl_get_description()
 480         return context_descr.impl_get_path_by_opt(descr)
 481
 482
 483 class CommonConfig(SubConfig):
 484     "abstract base class for the Config and the MetaConfig"
 485     __slots__ = ('_impl_values', '_impl_settings', '_impl_meta')
 486
 487     def _init_storage(self, config_id, is_persistent):
 488         if config_id is None:
 489             config_id = gen_id(self)
 490         import_lib = 'tiramisu.storage.{0}.storage'.format(storage_type)
 491         return __import__(import_lib, globals(), locals(), ['Storage'],
 492                           -1).Storage(config_id, is_persistent)
 493
 494     def _impl_build_all_paths(self):
 495         self.cfgimpl_get_description().impl_build_cache()
 496
 497     def read_only(self):
 498         "read only is a global config's setting, see `settings.py`"
 499         self.cfgimpl_get_settings().read_only()
 500
 501     def read_write(self):
 502         "read write is a global config's setting, see `settings.py`"
 503         self.cfgimpl_get_settings().read_write()
 504
 505     def getowner(self, path):
 506         """convenience method to retrieve an option's owner
 507         from the config itself
 508         """
 509         opt = self.cfgimpl_get_description().impl_get_opt_by_path(path)
 510         return self.cfgimpl_get_values().getowner(opt)
 511
 512     def unwrap_from_path(self, path, force_permissive=False):
 513         """convenience method to extract and Option() object from the Config()
 514         and it is **fast**: finds the option directly in the appropriate
 515         namespace
 516
 517         :returns: Option()
 518         """
 519         if '.' in path:
 520             homeconfig, path = self.cfgimpl_get_home_by_path(
 521                 path, force_permissive=force_permissive)
 522             return getattr(homeconfig.cfgimpl_get_description(), path)
 523         return getattr(self.cfgimpl_get_description(), path)
 524
 525     def cfgimpl_get_path(self):
 526         return None
 527
 528     def cfgimpl_get_meta(self):
 529         return self._impl_meta
 530
 531
 532 # ____________________________________________________________
 533 class Config(CommonConfig):
 534     "main configuration management entry"
 535     __slots__ = tuple()
 536
 537     def __init__(self, descr, config_id=None, is_persistent=False):
 538         """ Configuration option management master class
 539
 540         :param descr: describes the configuration schema
 541         :type descr: an instance of ``option.OptionDescription``
 542         :param context: the current root config
 543         :type context: `Config`
 544         """
 545         storage = self._init_storage(config_id, is_persistent)
 546         self._impl_settings = Settings(self, storage)
 547         self._impl_values = Values(self, storage)
 548         super(Config, self).__init__(descr, self)
 549         self._impl_build_all_paths()
 550         self._impl_meta = None
 551         self._impl_informations = {}
 552
 553     def cfgimpl_reset_cache(self,
 554                             only_expired=False,
 555                             only=('values', 'settings')):
 556         if 'values' in only:
 557             self.cfgimpl_get_values().reset_cache(only_expired=only_expired)
 558         if 'settings' in only:
 559             self.cfgimpl_get_settings().reset_cache(only_expired=only_expired)
 560
 561
 562 class MetaConfig(CommonConfig):
 563     __slots__ = ('_impl_children',)
 564
 565     def __init__(self, children, meta=True, config_id=None, is_persistent=False):
 566         if not isinstance(children, list):
 567             raise ValueError(_("metaconfig's children must be a list"))
 568         self._impl_descr = None
 569         self._impl_path = None
 570         if meta:
 571             for child in children:
 572                 if not isinstance(child, CommonConfig):
 573                     raise ValueError(_("metaconfig's children "
 574                                        "must be config, not {0}"
 575                                        ).format(type(child)))
 576                 if self._impl_descr is None:
 577                     self._impl_descr = child.cfgimpl_get_description()
 578                 elif not self._impl_descr is child.cfgimpl_get_description():
 579                     raise ValueError(_('all config in metaconfig must '
 580                                        'have the same optiondescription'))
 581                 if child.cfgimpl_get_meta() is not None:
 582                     raise ValueError(_("child has already a metaconfig's"))
 583                 child._impl_meta = self
 584
 585         if config_id is None:
 586             config_id = gen_id(self)
 587         self._impl_children = children
 588         storage = self._init_storage(config_id, is_persistent)
 589         self._impl_settings = Settings(self, storage)
 590         self._impl_values = Values(self, storage)
 591         self._impl_meta = None
 592         self._impl_informations = {}
 593
 594     def cfgimpl_get_children(self):
 595         return self._impl_children
 596
 597     def cfgimpl_get_context(self):
 598         "a meta config is a config wich has a setting, that is itself"
 599         return self
 600
 601     def cfgimpl_reset_cache(self,
 602                             only_expired=False,
 603                             only=('values', 'settings')):
 604         if 'values' in only:
 605             self.cfgimpl_get_values().reset_cache(only_expired=only_expired)
 606         if 'settings' in only:
 607             self.cfgimpl_get_settings().reset_cache(only_expired=only_expired)
 608         for child in self._impl_children:
 609             child.cfgimpl_reset_cache(only_expired=only_expired, only=only)
 610
 611     def set_contexts(self, path, value):
 612         for child in self._impl_children:
 613             try:
 614                 if not isinstance(child, MetaConfig):
 615                     setattr(child, path, value)
 616                 else:
 617                     child.set_contexts(path, value)
 618             except PropertiesOptionError:
 619                 pass
 620
 621     def find_first_contexts(self, byname=None, bypath=None, byvalue=None,
 622                             type_='context', display_error=True):
 623         ret = []
 624         try:
 625             if bypath is None and byname is not None and \
 626                     self.cfgimpl_get_description() is not None:
 627                 bypath = self._find(bytype=None, byvalue=None, byname=byname,
 628                                     first=True, type_='path',
 629                                     check_properties=False)
 630         except ConfigError:
 631             pass
 632         for child in self._impl_children:
 633             try:
 634                 if not isinstance(child, MetaConfig):
 635                     if bypath is not None:
 636                         if byvalue is not None:
 637                             if getattr(child, bypath) == byvalue:
 638                                 ret.append(child)
 639                         else:
 640                             #not raise
 641                             getattr(child, bypath)
 642                             ret.append(child)
 643                     else:
 644                         ret.append(child.find_first(byname=byname,
 645                                                     byvalue=byvalue,
 646                                                     type_=type_,
 647                                                     display_error=False))
 648                 else:
 649                     ret.extend(child.find_first_contexts(byname=byname,
 650                                                          bypath=bypath,
 651                                                          byvalue=byvalue,
 652                                                          type_=type_,
 653                                                          display_error=False))
 654             except AttributeError:
 655                 pass
 656         return ret
 657
 658
 659 def mandatory_warnings(config):
 660     """convenience function to trace Options that are mandatory and
 661     where no value has been set
 662
 663     :returns: generator of mandatory Option's path
 664
 665     """
 666     #if value in cache, properties are not calculated
 667     config.cfgimpl_reset_cache(only=('values',))
 668     for path in config.cfgimpl_get_description().impl_getpaths(
 669             include_groups=True):
 670         try:
 671             config._getattr(path, force_properties=frozenset(('mandatory',)))
 672             # XXX raise Exception("ca passe ici")
 673             # XXX depuis l'exterieur on donne un paht maintenant ! perturbant !
 674         except PropertiesOptionError, err:
 675             if err.proptype == ['mandatory']:
 676                 yield path
 677     config.cfgimpl_reset_cache(only=('values',))