revlog: remove some knowledge of sentinel nullid in index
I think the "-2" to mean "last position in index, not counting the
null revision at the end" is an implementation detail of the index
that we should avoid spreading knowledge of. I hope we can even remove
support for index[-2].
Differential Revision: https://phab.mercurial-scm.org/D4016
from __future__ import absolute_import
from mercurial.utils import (
procutil,
)
# XXX: we should probably offer a devel option to do this in blackbox directly
def getuser():
return b'bob'
def getpid():
return 5000
# mock the date and user apis so the output is always the same
def uisetup(ui):
procutil.getuser = getuser
procutil.getpid = getpid