view hgext/narrow/narrowtemplates.py @ 47012:d55b71393907

node: replace nullid and friends with nodeconstants class

The introduction of 256bit hashes require changes to nullid and other
constant magic values. Start pushing them down from repository and
revlog where sensible.

Differential Revision: https://phab.mercurial-scm.org/D9465

# narrowtemplates.py - added template keywords for 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 (
    registrar,
    revlog,
)

keywords = {}
templatekeyword = registrar.templatekeyword(keywords)
revsetpredicate = registrar.revsetpredicate()


def _isellipsis(repo, rev):
    if repo.changelog.flags(rev) & revlog.REVIDX_ELLIPSIS:
        return True
    return False


@templatekeyword(b'ellipsis', requires={b'repo', b'ctx'})
def ellipsis(context, mapping):
    """String. 'ellipsis' if the change is an ellipsis node, else ''."""
    repo = context.resource(mapping, b'repo')
    ctx = context.resource(mapping, b'ctx')
    if _isellipsis(repo, ctx.rev()):
        return b'ellipsis'
    return b''


@templatekeyword(b'outsidenarrow', requires={b'repo', b'ctx'})
def outsidenarrow(context, mapping):
    """String. 'outsidenarrow' if the change affects no tracked files,
    else ''."""
    repo = context.resource(mapping, b'repo')
    ctx = context.resource(mapping, b'ctx')
    m = repo.narrowmatch()
    if ctx.files() and not m.always():
        if not any(m(f) for f in ctx.files()):
            return b'outsidenarrow'
    return b''


@revsetpredicate(b'ellipsis()')
def ellipsisrevset(repo, subset, x):
    """Changesets that are ellipsis nodes."""
    return subset.filter(lambda r: _isellipsis(repo, r))