tests/pullext.py

tests: show that adding an already included path still calls narrow_widen()

This patch adds tests demonstrating that we still go to the server in
non-ellipses widening when we have that path already on the client and there is
nothing new to download.

The next patch will try to make client side logic smart and not go to the server
if we don't need to download anything.

Differential Revision: https://phab.mercurial-scm.org/D5182

# pullext.py - Simple extension to test pulling
#
# Copyright 2018 Gregory Szorc <[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 mercurial.i18n import _
from mercurial import (
    commands,
    error,
    extensions,
    localrepo,
    repository,
)

def clonecommand(orig, ui, repo, *args, **kwargs):
    if kwargs.get(r'include') or kwargs.get(r'exclude'):
        kwargs[r'narrow'] = True

    if kwargs.get(r'depth'):
        try:
            kwargs[r'depth'] = int(kwargs[r'depth'])
        except ValueError:
            raise error.Abort(_('--depth must be an integer'))

    return orig(ui, repo, *args, **kwargs)

def featuresetup(ui, features):
    features.add(repository.NARROW_REQUIREMENT)

def extsetup(ui):
    entry = extensions.wrapcommand(commands.table, 'clone', clonecommand)

    hasinclude = any(x[1] == 'include' for x in entry[1])
    hasdepth = any(x[1] == 'depth' for x in entry[1])

    if not hasinclude:
        entry[1].append(('', 'include', [],
                         _('pattern of file/directory to clone')))
        entry[1].append(('', 'exclude', [],
                         _('pattern of file/directory to not clone')))

    if not hasdepth:
        entry[1].append(('', 'depth', '',
                         _('ancestry depth of changesets to fetch')))

    localrepo.featuresetupfuncs.add(featuresetup)