view mercurial/mergeutil.py @ 48038:52018f8ef020 stable

persistent-nodemap: introduce a test to highlight possible race

Weakness in the current file caching of the changelog means that a writer can
end up using an outdated docket. This might result in "committed"
persistent-nodemap data from a previous writer to be overwritten by a later
writer. This break the strong "append only" assumption of the persistent nodemap
and can result in confused reader.

The race windows are quite narrow. See the test documentation for details.

The issues is fixed in the next changeset.

Differential Revision: https://phab.mercurial-scm.org/D11481

# mergeutil.py - help for merge processing in mercurial
#
# Copyright 2005-2007 Olivia Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

from .i18n import _

from . import error


def checkunresolved(ms):
    if ms.unresolvedcount():
        raise error.StateError(
            _(b"unresolved merge conflicts (see 'hg help resolve')")
        )