automation: drop support for Python 2.7 in Linux environment
We stop installing Python 2.7 via pyenv. We stop installing the system
Python 2 packages. We delete support for running tests on Python 2.7.
Differential Revision: https://phab.mercurial-scm.org/D12262
# extension to emulate interrupting filemerge._filemerge
from __future__ import absolute_import
from mercurial import (
error,
extensions,
filemerge,
)
def failfilemerge(*args, **kwargs):
raise error.Abort(b"^C")
def extsetup(ui):
extensions.wrapfunction(filemerge, 'filemerge', failfilemerge)