view hgext/narrow/narrowtemplates.py @ 38761:d558e53cd6b6 stable

context: safegaurd against 'lx' being passed as file flag in manifest

Subversion can have a file as executable link. When using hgsubversion, we will
have both islink and isexec True. This will lead to _flags being set to `lx`.
However, manifest expects flag to be one-byte so it will crash if 'lx' is
passed. Also it's impossible to have an executable link.

This patch will safegaurd us from having 'lx' being a possible value.

This was authored by Ivan Lezhankin from Yandex.

Differential Revision: https://phab.mercurial-scm.org/D3985

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

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

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