mirror of
https://github.com/thegeeklab/ansible-later.git
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314 lines
9.2 KiB
Python
314 lines
9.2 KiB
Python
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# -*- coding: utf-8 -*-
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# config.py
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# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
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#
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# This module is part of GitPython and is released under
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# the BSD License: http://www.opensource.org/licenses/bsd-license.php
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"""utilities to help provide compatibility with python 3"""
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# flake8: noqa
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import locale
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import os
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import sys
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import codecs
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from gitdb.utils.compat import (
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xrange,
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MAXSIZE, # @UnusedImport
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izip, # @UnusedImport
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)
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from gitdb.utils.encoding import (
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string_types, # @UnusedImport
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text_type, # @UnusedImport
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force_bytes, # @UnusedImport
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force_text # @UnusedImport
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)
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PY3 = sys.version_info[0] >= 3
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is_win = (os.name == 'nt')
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is_posix = (os.name == 'posix')
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is_darwin = (os.name == 'darwin')
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defenc = sys.getdefaultencoding()
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if PY3:
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import io
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FileType = io.IOBase
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def byte_ord(b):
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return b
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def bchr(n):
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return bytes([n])
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def mviter(d):
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return d.values()
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range = xrange # @ReservedAssignment
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unicode = str
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binary_type = bytes
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else:
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FileType = file # @UndefinedVariable on PY3
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# usually, this is just ascii, which might not enough for our encoding needs
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# Unless it's set specifically, we override it to be utf-8
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if defenc == 'ascii':
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defenc = 'utf-8'
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byte_ord = ord
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bchr = chr
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unicode = unicode
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binary_type = str
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range = xrange # @ReservedAssignment
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def mviter(d):
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return d.itervalues()
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def safe_decode(s):
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"""Safely decodes a binary string to unicode"""
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if isinstance(s, unicode):
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return s
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elif isinstance(s, bytes):
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return s.decode(defenc, 'surrogateescape')
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elif s is not None:
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raise TypeError('Expected bytes or text, but got %r' % (s,))
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def safe_encode(s):
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"""Safely decodes a binary string to unicode"""
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if isinstance(s, unicode):
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return s.encode(defenc)
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elif isinstance(s, bytes):
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return s
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elif s is not None:
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raise TypeError('Expected bytes or text, but got %r' % (s,))
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def win_encode(s):
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"""Encode unicodes for process arguments on Windows."""
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if isinstance(s, unicode):
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return s.encode(locale.getpreferredencoding(False))
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elif isinstance(s, bytes):
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return s
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elif s is not None:
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raise TypeError('Expected bytes or text, but got %r' % (s,))
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def with_metaclass(meta, *bases):
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"""copied from https://github.com/Byron/bcore/blob/master/src/python/butility/future.py#L15"""
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class metaclass(meta):
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__call__ = type.__call__
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__init__ = type.__init__
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def __new__(cls, name, nbases, d):
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if nbases is None:
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return type.__new__(cls, name, (), d)
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# There may be clients who rely on this attribute to be set to a reasonable value, which is why
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# we set the __metaclass__ attribute explicitly
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if not PY3 and '___metaclass__' not in d:
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d['__metaclass__'] = meta
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return meta(name, bases, d)
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return metaclass(meta.__name__ + 'Helper', None, {})
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## From https://docs.python.org/3.3/howto/pyporting.html
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class UnicodeMixin(object):
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"""Mixin class to handle defining the proper __str__/__unicode__
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methods in Python 2 or 3."""
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if PY3:
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def __str__(self):
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return self.__unicode__()
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else: # Python 2
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def __str__(self):
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return self.__unicode__().encode(defenc)
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"""
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This is Victor Stinner's pure-Python implementation of PEP 383: the "surrogateescape" error
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handler of Python 3.
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Source: misc/python/surrogateescape.py in https://bitbucket.org/haypo/misc
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"""
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# This code is released under the Python license and the BSD 2-clause license
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FS_ERRORS = 'surrogateescape'
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# # -- Python 2/3 compatibility -------------------------------------
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# FS_ERRORS = 'my_surrogateescape'
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def u(text):
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if PY3:
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return text
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else:
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return text.decode('unicode_escape')
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def b(data):
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if PY3:
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return data.encode('latin1')
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else:
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return data
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if PY3:
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_unichr = chr
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bytes_chr = lambda code: bytes((code,))
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else:
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_unichr = unichr
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bytes_chr = chr
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def surrogateescape_handler(exc):
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"""
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Pure Python implementation of the PEP 383: the "surrogateescape" error
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handler of Python 3. Undecodable bytes will be replaced by a Unicode
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character U+DCxx on decoding, and these are translated into the
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original bytes on encoding.
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"""
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mystring = exc.object[exc.start:exc.end]
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try:
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if isinstance(exc, UnicodeDecodeError):
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# mystring is a byte-string in this case
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decoded = replace_surrogate_decode(mystring)
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elif isinstance(exc, UnicodeEncodeError):
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# In the case of u'\udcc3'.encode('ascii',
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# 'this_surrogateescape_handler'), both Python 2.x and 3.x raise an
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# exception anyway after this function is called, even though I think
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# it's doing what it should. It seems that the strict encoder is called
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# to encode the unicode string that this function returns ...
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decoded = replace_surrogate_encode(mystring, exc)
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else:
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raise exc
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except NotASurrogateError:
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raise exc
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return (decoded, exc.end)
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class NotASurrogateError(Exception):
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pass
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def replace_surrogate_encode(mystring, exc):
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"""
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Returns a (unicode) string, not the more logical bytes, because the codecs
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register_error functionality expects this.
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"""
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decoded = []
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for ch in mystring:
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# if PY3:
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# code = ch
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# else:
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code = ord(ch)
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# The following magic comes from Py3.3's Python/codecs.c file:
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if not 0xD800 <= code <= 0xDCFF:
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# Not a surrogate. Fail with the original exception.
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raise exc
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# mybytes = [0xe0 | (code >> 12),
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# 0x80 | ((code >> 6) & 0x3f),
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# 0x80 | (code & 0x3f)]
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# Is this a good idea?
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if 0xDC00 <= code <= 0xDC7F:
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decoded.append(_unichr(code - 0xDC00))
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elif code <= 0xDCFF:
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decoded.append(_unichr(code - 0xDC00))
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else:
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raise NotASurrogateError
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return str().join(decoded)
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def replace_surrogate_decode(mybytes):
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"""
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Returns a (unicode) string
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"""
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decoded = []
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for ch in mybytes:
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# We may be parsing newbytes (in which case ch is an int) or a native
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# str on Py2
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if isinstance(ch, int):
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code = ch
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else:
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code = ord(ch)
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if 0x80 <= code <= 0xFF:
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decoded.append(_unichr(0xDC00 + code))
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elif code <= 0x7F:
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decoded.append(_unichr(code))
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else:
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# # It may be a bad byte
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# # Try swallowing it.
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# continue
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# print("RAISE!")
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raise NotASurrogateError
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return str().join(decoded)
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def encodefilename(fn):
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if FS_ENCODING == 'ascii':
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# ASCII encoder of Python 2 expects that the error handler returns a
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# Unicode string encodable to ASCII, whereas our surrogateescape error
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# handler has to return bytes in 0x80-0xFF range.
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encoded = []
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for index, ch in enumerate(fn):
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code = ord(ch)
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if code < 128:
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ch = bytes_chr(code)
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elif 0xDC80 <= code <= 0xDCFF:
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ch = bytes_chr(code - 0xDC00)
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else:
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raise UnicodeEncodeError(FS_ENCODING,
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fn, index, index+1,
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'ordinal not in range(128)')
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encoded.append(ch)
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return bytes().join(encoded)
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elif FS_ENCODING == 'utf-8':
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# UTF-8 encoder of Python 2 encodes surrogates, so U+DC80-U+DCFF
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# doesn't go through our error handler
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encoded = []
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for index, ch in enumerate(fn):
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code = ord(ch)
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if 0xD800 <= code <= 0xDFFF:
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if 0xDC80 <= code <= 0xDCFF:
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ch = bytes_chr(code - 0xDC00)
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encoded.append(ch)
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else:
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raise UnicodeEncodeError(
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FS_ENCODING,
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fn, index, index+1, 'surrogates not allowed')
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else:
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ch_utf8 = ch.encode('utf-8')
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encoded.append(ch_utf8)
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return bytes().join(encoded)
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else:
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return fn.encode(FS_ENCODING, FS_ERRORS)
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def decodefilename(fn):
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return fn.decode(FS_ENCODING, FS_ERRORS)
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FS_ENCODING = 'ascii'; fn = b('[abc\xff]'); encoded = u('[abc\udcff]')
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# FS_ENCODING = 'cp932'; fn = b('[abc\x81\x00]'); encoded = u('[abc\udc81\x00]')
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# FS_ENCODING = 'UTF-8'; fn = b('[abc\xff]'); encoded = u('[abc\udcff]')
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# normalize the filesystem encoding name.
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# For example, we expect "utf-8", not "UTF8".
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FS_ENCODING = codecs.lookup(FS_ENCODING).name
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def register_surrogateescape():
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"""
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Registers the surrogateescape error handler on Python 2 (only)
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"""
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if PY3:
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return
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try:
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codecs.lookup_error(FS_ERRORS)
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except LookupError:
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codecs.register_error(FS_ERRORS, surrogateescape_handler)
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try:
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b"100644 \x9f\0aaa".decode(defenc, "surrogateescape")
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except Exception:
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register_surrogateescape()
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