How to use lookup_function method in localstack

Best Python code snippet using localstack_python

descriptors.py

Source:descriptors.py

1# Copyright 2020, Chris PeBenito <pebenito@ieee.org>2#3# SPDX-License-Identifier: LGPL-2.1-only4#5import re6from typing import Callable, Union7from ..exception import InvalidCheckValue8from ..descriptors import CriteriaDescriptor, CriteriaPermissionSetDescriptor9class ConfigDescriptor(CriteriaDescriptor):10    """11    Single item configuration option descriptor.12    Parameter:13    lookup_function The name of the SELinuxPolicy lookup function,14                    e.g. lookup_type or lookup_boolean.15    Read-only instance attribute use (obj parameter):16    checkname       The name of the check.17    policy          The instance of SELinuxPolicy18    """19    def __init__(self, lookup_function: Union[Callable, str]) -> None:20        super().__init__(lookup_function=lookup_function)21    def __set__(self, obj, value):22        if not value:23            self.instances[obj] = None24        else:25            try:26                super().__set__(obj, value.strip())27            except ValueError as ex:28                raise InvalidCheckValue("{}: Invalid {} setting: {}".format(29                    obj.checkname, self.name, ex)) from ex30class ConfigSetDescriptor(CriteriaDescriptor):31    """32    Descriptor for a configuration option set.33    Parameter:34    lookup_function The name of the SELinuxPolicy lookup function,35                    e.g. lookup_type or lookup_boolean.36    Keyword Parameters:37    strict          (Bool) If True, all objects must exist in the policy38                    when setting the value.  If False, any objects that39                    fail the policy lookup will be dropped instead of raising40                    an exception.  The default is True.41    expand          (Bool) If True, each object will be expanded.  Default42                    is False.43    Read-only instance attribute use (obj parameter):44    checkname       The name of the check.45    log             A logger instance.46    policy          The instance of SELinuxPolicy47    """48    def __init__(self, lookup_function: Union[Callable, str], strict: bool = True,49                 expand: bool = False) -> None:50        super().__init__(lookup_function=lookup_function, default_value=frozenset())51        self.strict = strict52        self.expand = expand53    def __set__(self, obj, value):54        if not value:55            self.instances[obj] = frozenset()56        else:57            log = obj.log58            if callable(self.lookup_function):59                lookup = self.lookup_function60            else:61                lookup = getattr(obj.policy, self.lookup_function)62            ret = set()63            for item in (i for i in re.split(r"\s", value) if i):64                try:65                    o = lookup(item)66                    if self.expand:67                        ret.update(o.expand())68                    else:69                        ret.add(o)70                except ValueError as e:71                    if self.strict:72                        log.error("Invalid {} item: {}".format(self.name, e))73                        log.debug("Traceback:", exc_info=e)74                        raise InvalidCheckValue("{}: Invalid {} item: {}".format(75                            obj.checkname, self.name, e)) from e76                    log.info("{}: Invalid {} item: {}".format(77                        obj.checkname, self.name, e))78            self.instances[obj] = frozenset(ret)79class ConfigPermissionSetDescriptor(CriteriaPermissionSetDescriptor):80    """81    Descriptor for a configuration permissions set.82    Read-only instance attribute use (obj parameter):83    checkname       The name of the check.84    policy          The instance of SELinuxPolicy85    tclass          If it exists, it will be used to validate the86                    permissions.  See validate_perms_any()87    """88    def __init__(self) -> None:89        super().__init__(default_value=frozenset())90    def __set__(self, obj, value):91        if not value:92            self.instances[obj] = frozenset()93        else:94            try:95                super().__set__(obj, (v for v in value.split(" ") if v))96            except ValueError as ex:97                raise InvalidCheckValue("{}: Invalid {} setting: {}".format(...

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