view hgext/narrow/narrowpatch.py @ 39933:d5498db5f86a

narrow: move the wireprotocol narrow capability name to core

We are trying to integrate the whole of narrow logic into core and it will be
helpful for upcoming patches to have these capability names in core. The next
patch will move the ellipses capability to core also.

The exact motivation is to know whether we are cloning a ellipses repo or not
and adding an ellipses repo requirement.

Differential Revision: https://phab.mercurial-scm.org/D4808

# narrowpatch.py - extensions to mercurial patch module to support narrow clones
#
# Copyright 2017 Google, Inc.
#
# 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 import (
    extensions,
    patch,
)

def setup(repo):
    def _filepairs(orig, *args):
        """Only includes files within the narrow spec in the diff."""
        narrowmatch = repo.narrowmatch()
        if not narrowmatch.always():
            for x in orig(*args):
                f1, f2, copyop = x
                if ((not f1 or narrowmatch(f1)) and
                    (not f2 or narrowmatch(f2))):
                    yield x
        else:
            for x in orig(*args):
                yield x

    def trydiff(orig, repo, revs, ctx1, ctx2, modified, added, removed,
                copy, getfilectx, *args, **kwargs):
        narrowmatch = repo.narrowmatch()
        if not narrowmatch.always():
            modified = [f for f in modified if narrowmatch(f)]
            added = [f for f in added if narrowmatch(f)]
            removed = [f for f in removed if narrowmatch(f)]
            copy = {k: v for k, v in copy.iteritems() if narrowmatch(k)}
        return orig(repo, revs, ctx1, ctx2, modified, added, removed, copy,
                    getfilectx, *args, **kwargs)

    extensions.wrapfunction(patch, '_filepairs', _filepairs)
    extensions.wrapfunction(patch, 'trydiff', trydiff)