view contrib/casesmash.py @ 51400:e2dfa403452d

debug: add a debug::unbundle command that simulate the unbundle from a push

The code have different behavior when the unbundle comes from a push, so we
introduce a command that can simulate such unbundle.

For our copy of mozilla-try-2023-03-22, this make the unbundle jump from 2.5
seconds (with `hg unbundle`) to 15 seconds (with `hg debug::unbundle`).

That 15 seconds timings is consistent with the issue seen in production.

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')