tests/failfilemerge.py

util: better handle '-' in version string (issue5302)

versiontuple() was previously only splitting on '+' and strings
like "3.9-rc" were causing it to misreport the version as
(3, None). By splitting on either '+' or '-' we can handle
our version strings with "-rc" in them.

# extension to emulate interupting filemerge._filemerge

from __future__ import absolute_import

from mercurial import (
    error,
    extensions,
    filemerge,
)

def failfilemerge(filemergefn,
        premerge, repo, mynode, orig, fcd, fco, fca, labels=None):
    raise error.Abort("^C")
    return filemergefn(premerge, repo, mynode, orig, fcd, fco, fca, labels)

def extsetup(ui):
    extensions.wrapfunction(filemerge, '_filemerge',
                            failfilemerge)