# __init__.py - narrowhg extension

#

# 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.

'''create clones which fetch history data for subset of files (EXPERIMENTAL)'''

from __future__ import absolute_import

# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for

# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should

# be specifying the version(s) of Mercurial they are tested with, or

# leave the attribute unspecified.

testedwith = 'ships-with-hg-core'

from mercurial import (

    extensions,

    localrepo,

    registrar,

    repository,

    verify as verifymod,

)

from . import (

    narrowbundle2,

    narrowcommands,

    narrowcopies,

    narrowpatch,

    narrowrepo,

    narrowrevlog,

    narrowtemplates,

    narrowwirepeer,

)

configtable = {}

configitem = registrar.configitem(configtable)

# Narrowhg *has* support for serving ellipsis nodes (which are used at

# least by Google's internal server), but that support is pretty

# fragile and has a lot of problems on real-world repositories that

# have complex graph topologies. This could probably be corrected, but

# absent someone needing the full support for ellipsis nodes in

# repositories with merges, it's unlikely this work will get done. As

# of this writining in late 2017, all repositories large enough for

# ellipsis nodes to be a hard requirement also enforce strictly linear

# history for other scaling reasons.

configitem('experimental', 'narrowservebrokenellipses',

           default=False,

           alias=[('narrow', 'serveellipses')],

)

# Export the commands table for Mercurial to see.

cmdtable = narrowcommands.table

def featuresetup(ui, features):

    features.add(repository.NARROW_REQUIREMENT)

def uisetup(ui):

    """Wraps user-facing mercurial commands with narrow-aware versions."""

    localrepo.featuresetupfuncs.add(featuresetup)

    narrowrevlog.setup()

    narrowbundle2.setup()

    narrowcommands.setup()

    narrowwirepeer.uisetup()

def reposetup(ui, repo):

    """Wraps local repositories with narrow repo support."""

    if not repo.local():

        return

    if repository.NARROW_REQUIREMENT in repo.requirements:

        narrowrepo.wraprepo(repo)

        narrowcopies.setup(repo)

        narrowpatch.setup(repo)

        narrowwirepeer.reposetup(repo)

def _verifierinit(orig, self, repo, matcher=None):

    # The verifier's matcher argument was desgined for narrowhg, so it should

    # be None from core. If another extension passes a matcher (unlikely),

    # we'll have to fail until matchers can be composed more easily.

    assert matcher is None

    orig(self, repo, repo.narrowmatch())

def extsetup(ui):

    extensions.wrapfunction(verifymod.verifier, '__init__', _verifierinit)

templatekeyword = narrowtemplates.templatekeyword

revsetpredicate = narrowtemplates.revsetpredicate