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# -*- coding: utf-8 -*-

# config.py

# This module is part of GitPython and is released under

# the BSD License: http://www.opensource.org/licenses/bsd-license.php

"""utilities to help provide compatibility with python 3"""

# flake8: noqa

import locale

import os

import sys

from gitdb.utils.encoding import (

force_bytes, # @UnusedImport

force_text # @UnusedImport

)

is_win = (os.name == 'nt')

is_posix = (os.name == 'posix')

is_darwin = (os.name == 'darwin')

defenc = sys.getfilesystemencoding()

def safe_decode(s):

"""Safely decodes a binary string to unicode"""

if isinstance(s, str):

return s

elif isinstance(s, bytes):

return s.decode(defenc, 'surrogateescape')

elif s is not None:

raise TypeError('Expected bytes or text, but got %r' % (s,))

def safe_encode(s):

"""Safely decodes a binary string to unicode"""

if isinstance(s, str):

return s.encode(defenc)

elif isinstance(s, bytes):

return s

elif s is not None:

raise TypeError('Expected bytes or text, but got %r' % (s,))

def win_encode(s):

"""Encode unicodes for process arguments on Windows."""

if isinstance(s, str):

return s.encode(locale.getpreferredencoding(False))

elif isinstance(s, bytes):

return s

elif s is not None:

raise TypeError('Expected bytes or text, but got %r' % (s,))

def with_metaclass(meta, *bases):

"""copied from https://github.com/Byron/bcore/blob/master/src/python/butility/future.py#L15"""

class metaclass(meta):

__call__ = type.__call__

__init__ = type.__init__

def __new__(cls, name, nbases, d):

if nbases is None:

return type.__new__(cls, name, (), d)

return meta(name, bases, d)

return metaclass(meta.__name__ + 'Helper', None, {})

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