chg: add fchdirx as a utility function
As part of the series to support long socket paths, we need to use fchdir and
check its result in several places. Make it a utility function.
# 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 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
try:
xrange
except NameError:
import builtins
builtins.xrange = range