view hgext/fsmonitor/pywatchman/encoding.py @ 45242:5780a04a1b46

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# Copyright 2016-present Facebook, Inc.
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#
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# modification, are permitted provided that the following conditions are met:
#
#  * Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
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#  * Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
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#    prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# no unicode literals
from __future__ import absolute_import, division, print_function

import sys

from . import compat


"""Module to deal with filename encoding on the local system, as returned by
Watchman."""


if compat.PYTHON3:
    default_local_errors = "surrogateescape"

    def get_local_encoding():
        if sys.platform == "win32":
            # Watchman always returns UTF-8 encoded strings on Windows.
            return "utf-8"
        # On the Python 3 versions we support, sys.getfilesystemencoding never
        # returns None.
        return sys.getfilesystemencoding()


else:
    # Python 2 doesn't support surrogateescape, so use 'strict' by
    # default. Users can register a custom surrogateescape error handler and use
    # that if they so desire.
    default_local_errors = "strict"

    def get_local_encoding():
        if sys.platform == "win32":
            # Watchman always returns UTF-8 encoded strings on Windows.
            return "utf-8"
        fsencoding = sys.getfilesystemencoding()
        if fsencoding is None:
            # This is very unlikely to happen, but if it does, just use UTF-8
            fsencoding = "utf-8"
        return fsencoding


def encode_local(s):
    return s.encode(get_local_encoding(), default_local_errors)


def decode_local(bs):
    return bs.decode(get_local_encoding(), default_local_errors)