contrib/casesmash.py

rebase: also restore "ui.allowemptycommit" value

It looks like this was lost when the code was converted to the
ui.configoverride() context manager in f255b1811f5e (rebase: get rid
of ui.backupconfig, 2017-03-16). (And then the bad example was
duplicated in 228916ca12b5 (rebase: add concludememorynode(), and call
it when rebasing in-memory, 2017-12-07).)

Differential Revision: https://phab.mercurial-scm.org/D2760

from __future__ import absolute_import
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')