tiramisu-cmdline-parser/tiramisu_cmdline_parser.py

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# Copyright (C) 2018 Team tiramisu (see AUTHORS for all contributors)
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from typing import Union, List, Optional
from argparse import ArgumentParser, Namespace, SUPPRESS, _HelpAction
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try:
from tiramisu import Config
from tiramisu.error import PropertiesOptionError
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except ImportError:
Config = None
from tiramisu_json_api.error import PropertiesOptionError
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try:
from tiramisu_json_api import Config as ConfigJson
if Config is None:
Config = ConfigJson
except ImportError:
ConfigJson = Config
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class TiramisuNamespace(Namespace):
def _populate(self):
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#self._config.property.read_only()
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for tiramisu_key, tiramisu_value in self._config.value.dict().items():
option = self._config.option(tiramisu_key)
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if not option.option.issymlinkoption():
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if tiramisu_value == [] and option.option.ismulti() and option.owner.isdefault():
tiramisu_value = None
super().__setattr__(tiramisu_key, tiramisu_value)
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#self._config.property.read_write()
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def __init__(self, config):
self._config = config
super().__init__()
def __setattr__(self, key, value):
if key == '_config':
super().__setattr__(key, value)
return
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# self._config.property.read_write()
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option = self._config.option(key)
if option.option.ismulti() and value is not None and not isinstance(value, list):
value = [value]
option.value.set(value)
def __getattribute__(self, key):
if key == '__dict__' and hasattr(self, '_config'):
self._populate()
return super().__getattribute__(key)
class _TiramisuHelpAction(_HelpAction):
needs = False
def __call__(self, *args, **kwargs):
_TiramisuHelpAction.needs = True
def display(self, parser):
_HelpAction.__call__(self, parser, None, None)
class TiramisuCmdlineParser(ArgumentParser):
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def __init__(self,
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config: Union[Config, ConfigJson],
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*args,
fullpath: bool=True,
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_forhelp: bool=False,
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**kwargs):
self.fullpath = fullpath
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self.config = config
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super().__init__(*args, **kwargs)
self.register('action', 'help', _TiramisuHelpAction)
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self._config_to_argparser(_forhelp,
self.config.option)
def _pop_action_class(self, kwargs, default=None):
ret = super()._pop_action_class(kwargs, default)
if kwargs.get('action') != 'help' and kwargs.get('dest') != 'help':
return ret
return _TiramisuHelpAction
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def _match_arguments_partial(self,
actions,
arg_string_pattern):
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# used only when check first proposal for first value
# we have to remove all actions with propertieserror
# so only first settable option will be returned
actions_pop = []
for idx, action in enumerate(actions):
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if self.config.option(action.dest).property.get(only_raises=True):
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actions_pop.append(idx)
else:
break
for idx in actions_pop:
actions.pop(0)
return super()._match_arguments_partial(actions, arg_string_pattern)
def _parse_known_args(self, args=None, namespace=None):
namespace_, args_ = super()._parse_known_args(args, namespace)
if args != args_ and args_ and args_[0].startswith(self.prefix_chars):
# option that was disabled are no more disable
# so create a new parser
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new_parser = TiramisuCmdlineParser(self.config,
self.prog,
fullpath=self.fullpath)
namespace_, args_ = new_parser._parse_known_args(args_, namespace)
else:
if self._registries['action']['help'].needs:
# display help only when all variables assignemnt are done
self._registries['action']['help'].needs = False
helper = self._registries['action']['help'](None)
helper.display(self)
return namespace_, args_
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def add_argument(self, *args, **kwargs):
if args == ('-h', '--help'):
super().add_argument(*args, **kwargs)
else:
raise NotImplementedError('do not use add_argument')
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def add_arguments(self, *args, **kwargs):
raise NotImplementedError('do not use add_argument')
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def add_subparsers(self, *args, **kwargs):
raise NotImplementedError('do not use add_subparsers')
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def _gen_argument(self, name, properties):
if len(name) == 1 and 'longargument' not in properties:
return self.prefix_chars + name
return self.prefix_chars * 2 + name
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def _config_to_argparser(self,
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_forhelp: bool,
config,
prefix: Optional[str]=None,
group=None) -> None:
if group is None:
group = super()
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actions = {}
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for obj in config.list(type='all'):
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option = obj.option
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if option.isoptiondescription():
if _forhelp:
group = self.add_argument_group(option.doc())
if prefix:
prefix_ = prefix + '.' + option.name()
else:
prefix_ = option.path()
self._config_to_argparser(_forhelp, obj, prefix_, group)
continue
if 'frozen' in option.properties():
continue
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name = option.name()
if name.startswith(self.prefix_chars):
raise ValueError('name cannot startswith "{}"'.format(self.prefix_chars))
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if self.fullpath and prefix:
name = prefix + '.' + name
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properties = obj.property.get()
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kwargs = {'help': option.doc().replace('%', '%%')}
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if option.issymlinkoption():
actions[option.name(follow_symlink=True)][0].insert(0, self._gen_argument(name, properties))
continue
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if 'positional' in properties:
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if not 'mandatory' in properties:
raise ValueError('"positional" argument must be "mandatory" too')
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args = [option.path()]
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if _forhelp:
kwargs['default'] = obj.value.default()
else:
kwargs['default'] = obj.value.get()
kwargs['nargs'] = '?'
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else:
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kwargs['dest'] = option.path()
kwargs['default'] = SUPPRESS
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args = [self._gen_argument(name, properties)]
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if _forhelp and 'mandatory' in properties:
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kwargs['required'] = True
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if option.type() == 'boolean':
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if 'mandatory' in properties:
raise ValueError('"mandatory" property is not allowed for BoolOption')
#if not isinstance(option.default(), bool):
# raise ValueError('default value is mandatory for BoolOption')
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if obj.value.get() is False:
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action = 'store_true'
else:
action = 'store_false'
kwargs['action'] = action
else:
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if _forhelp:
value = obj.value.default()
else:
value = obj.value.get()
if value not in [None, []]:
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#kwargs['default'] = kwargs['const'] = option.default()
#kwargs['action'] = 'store_const'
kwargs['nargs'] = '?'
if option.ismulti():
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if _forhelp and 'mandatory' in properties:
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kwargs['nargs'] = '+'
else:
kwargs['nargs'] = '*'
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if option.type() == 'string':
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pass
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elif option.type() == 'integer':
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kwargs['type'] = int
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elif option.type() == 'choice':
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kwargs['choices'] = obj.value.list()
else:
pass
#raise NotImplementedError('not supported yet')
actions[option.name()] = (args, kwargs)
for args, kwargs in actions.values():
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group.add_argument(*args, **kwargs)
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def parse_args(self,
*args,
valid_mandatory=True,
**kwargs):
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kwargs['namespace'] = TiramisuNamespace(self.config)
try:
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namespaces = super().parse_args(*args, **kwargs)
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del namespaces.__dict__['_config']
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except PropertiesOptionError as err:
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name = err._option_bag.option.impl_getname()
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properties = self.config.option(name).property.get()
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if 'positional' not in properties:
if len(name) == 1 and 'longargument' not in properties:
name = self.prefix_chars + name
else:
name = self.prefix_chars * 2 + name
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if err.proptype == ['mandatory']:
self.error('the following arguments are required: {}'.format(name))
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else:
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self.error('unrecognized arguments: {}'.format(name))
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if valid_mandatory:
for key in self.config.value.mandatory():
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properties = self.config.option(key).property.get()
if 'positional' not in properties:
if self.fullpath or '.' not in key:
name = key
else:
name = key.rsplit('.', 1)[1]
args = self._gen_argument(name, self.config.option(key).property.get())
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else:
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args = key
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self.error('the following arguments are required: {}'.format(args))
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return namespaces
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def format_usage(self,
*args,
**kwargs):
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help_formatter = TiramisuCmdlineParser(self.config,
self.prog,
fullpath=self.fullpath,
_forhelp=True)
return super(TiramisuCmdlineParser, help_formatter).format_usage(*args, **kwargs)
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def format_help(self,
*args,
**kwargs):
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help_formatter = TiramisuCmdlineParser(self.config,
self.prog,
fullpath=self.fullpath,
_forhelp=True)
return super(TiramisuCmdlineParser, help_formatter).format_help(*args, **kwargs)
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def get_config(self):
return self.config