import __builtin__

import os

from mercurial import util

def lowerwrap(scope, funcname):

    f = getattr(scope, funcname)

    def wrap(fname, *args, **kwargs):

        d, base = os.path.split(fname)

        try:

            files = os.listdir(d or '.')

        except OSError:

            files = []

        if base in files:

            return f(fname, *args, **kwargs)

        for fn in files:

            if fn.lower() == base.lower():

                return f(os.path.join(d, fn), *args, **kwargs)

        return f(fname, *args, **kwargs)

    scope.__dict__[funcname] = wrap

def normcase(path):

    return path.lower()

os.path.normcase = normcase

for f in 'file open'.split():

    lowerwrap(__builtin__, f)

for f in "chmod chown open lstat stat remove unlink".split():

    lowerwrap(os, f)

for f in "exists lexists".split():

    lowerwrap(os.path, f)

lowerwrap(util, 'posixfile')