# pycompat.py - portability shim for python 3

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

"""Mercurial portability shim for python 3.

This contains aliases to hide python version-specific details from the core.

"""

from __future__ import absolute_import

try:

    import cPickle as pickle

    pickle.dumps

except ImportError:

    import pickle

    pickle.dumps # silence pyflakes

try:

    import cStringIO as io

    stringio = io.StringIO

except ImportError:

    import io

    stringio = io.StringIO

try:

    import Queue as _queue

    _queue.Queue

except ImportError:

    import queue as _queue

empty = _queue.Empty

queue = _queue.Queue

class _pycompatstub(object):

    pass

def _alias(alias, origin, items):

    """ populate a _pycompatstub

    copies items from origin to alias

    """

    def hgcase(item):

        return item.replace('_', '').lower()

    for item in items:

        try:

            setattr(alias, hgcase(item), getattr(origin, item))

        except AttributeError:

            pass

urlreq = _pycompatstub()

urlerr = _pycompatstub()

try:

    import urllib2

    import urllib

    _alias(urlreq, urllib, (

        "addclosehook",

        "addinfourl",

        "ftpwrapper",

        "pathname2url",

        "quote",

        "splitattr",

        "splitpasswd",

        "splitport",

        "splituser",

        "unquote",

        "url2pathname",

        "urlencode",

        "urlencode",

    ))

    _alias(urlreq, urllib2, (

        "AbstractHTTPHandler",

        "BaseHandler",

        "build_opener",

        "FileHandler",

        "FTPHandler",

        "HTTPBasicAuthHandler",

        "HTTPDigestAuthHandler",

        "HTTPHandler",

        "HTTPPasswordMgrWithDefaultRealm",

        "HTTPSHandler",

        "install_opener",

        "ProxyHandler",

        "Request",

        "urlopen",

    ))

    _alias(urlerr, urllib2, (

        "HTTPError",

        "URLError",

    ))

except ImportError:

    import urllib.request

    _alias(urlreq, urllib.request, (

        "AbstractHTTPHandler",

        "addclosehook",

        "addinfourl",

        "BaseHandler",

        "build_opener",

        "FileHandler",

        "FTPHandler",

        "ftpwrapper",

        "HTTPHandler",

        "HTTPSHandler",

        "install_opener",

        "pathname2url",

        "HTTPBasicAuthHandler",

        "HTTPDigestAuthHandler",

        "ProxyHandler",

        "quote",

        "Request",

        "splitattr",

        "splitpasswd",

        "splitport",

        "splituser",

        "unquote",

        "url2pathname",

        "urlopen",

    ))

    import urllib.error

    _alias(urlerr, urllib.error, (

        "HTTPError",

        "URLError",

    ))

try:

    xrange

except NameError:

    import builtins

    builtins.xrange = range