mirror of
https://gitlab.sectorq.eu/jaydee/omv_backup.git
synced 2025-10-30 18:11:10 +01:00
128 lines
3.8 KiB
Python
Executable File
128 lines
3.8 KiB
Python
Executable File
# This file is dual licensed under the terms of the Apache License, Version
|
|
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
|
|
# for complete details.
|
|
|
|
from __future__ import annotations
|
|
|
|
import enum
|
|
import sys
|
|
import types
|
|
import typing
|
|
import warnings
|
|
|
|
|
|
# We use a UserWarning subclass, instead of DeprecationWarning, because CPython
|
|
# decided deprecation warnings should be invisible by default.
|
|
class CryptographyDeprecationWarning(UserWarning):
|
|
pass
|
|
|
|
|
|
# Several APIs were deprecated with no specific end-of-life date because of the
|
|
# ubiquity of their use. They should not be removed until we agree on when that
|
|
# cycle ends.
|
|
DeprecatedIn36 = CryptographyDeprecationWarning
|
|
DeprecatedIn37 = CryptographyDeprecationWarning
|
|
DeprecatedIn40 = CryptographyDeprecationWarning
|
|
DeprecatedIn41 = CryptographyDeprecationWarning
|
|
DeprecatedIn42 = CryptographyDeprecationWarning
|
|
DeprecatedIn43 = CryptographyDeprecationWarning
|
|
|
|
|
|
def _check_bytes(name: str, value: bytes) -> None:
|
|
if not isinstance(value, bytes):
|
|
raise TypeError(f"{name} must be bytes")
|
|
|
|
|
|
def _check_byteslike(name: str, value: bytes) -> None:
|
|
try:
|
|
memoryview(value)
|
|
except TypeError:
|
|
raise TypeError(f"{name} must be bytes-like")
|
|
|
|
|
|
def int_to_bytes(integer: int, length: int | None = None) -> bytes:
|
|
if length == 0:
|
|
raise ValueError("length argument can't be 0")
|
|
return integer.to_bytes(
|
|
length or (integer.bit_length() + 7) // 8 or 1, "big"
|
|
)
|
|
|
|
|
|
class InterfaceNotImplemented(Exception):
|
|
pass
|
|
|
|
|
|
class _DeprecatedValue:
|
|
def __init__(self, value: object, message: str, warning_class):
|
|
self.value = value
|
|
self.message = message
|
|
self.warning_class = warning_class
|
|
|
|
|
|
class _ModuleWithDeprecations(types.ModuleType):
|
|
def __init__(self, module: types.ModuleType):
|
|
super().__init__(module.__name__)
|
|
self.__dict__["_module"] = module
|
|
|
|
def __getattr__(self, attr: str) -> object:
|
|
obj = getattr(self._module, attr)
|
|
if isinstance(obj, _DeprecatedValue):
|
|
warnings.warn(obj.message, obj.warning_class, stacklevel=2)
|
|
obj = obj.value
|
|
return obj
|
|
|
|
def __setattr__(self, attr: str, value: object) -> None:
|
|
setattr(self._module, attr, value)
|
|
|
|
def __delattr__(self, attr: str) -> None:
|
|
obj = getattr(self._module, attr)
|
|
if isinstance(obj, _DeprecatedValue):
|
|
warnings.warn(obj.message, obj.warning_class, stacklevel=2)
|
|
|
|
delattr(self._module, attr)
|
|
|
|
def __dir__(self) -> typing.Sequence[str]:
|
|
return ["_module", *dir(self._module)]
|
|
|
|
|
|
def deprecated(
|
|
value: object,
|
|
module_name: str,
|
|
message: str,
|
|
warning_class: type[Warning],
|
|
name: str | None = None,
|
|
) -> _DeprecatedValue:
|
|
module = sys.modules[module_name]
|
|
if not isinstance(module, _ModuleWithDeprecations):
|
|
sys.modules[module_name] = module = _ModuleWithDeprecations(module)
|
|
dv = _DeprecatedValue(value, message, warning_class)
|
|
# Maintain backwards compatibility with `name is None` for pyOpenSSL.
|
|
if name is not None:
|
|
setattr(module, name, dv)
|
|
return dv
|
|
|
|
|
|
def cached_property(func: typing.Callable) -> property:
|
|
cached_name = f"_cached_{func}"
|
|
sentinel = object()
|
|
|
|
def inner(instance: object):
|
|
cache = getattr(instance, cached_name, sentinel)
|
|
if cache is not sentinel:
|
|
return cache
|
|
result = func(instance)
|
|
setattr(instance, cached_name, result)
|
|
return result
|
|
|
|
return property(inner)
|
|
|
|
|
|
# Python 3.10 changed representation of enums. We use well-defined object
|
|
# representation and string representation from Python 3.9.
|
|
class Enum(enum.Enum):
|
|
def __repr__(self) -> str:
|
|
return f"<{self.__class__.__name__}.{self._name_}: {self._value_!r}>"
|
|
|
|
def __str__(self) -> str:
|
|
return f"{self.__class__.__name__}.{self._name_}"
|