# Copyright 2017 Facebook, 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

import os

import tempfile

from mercurial.node import hex

from mercurial import (

    error,

    extensions,

)

def isremotebooksenabled(ui):

    return ('remotenames' in extensions._extensions and

            ui.configbool('remotenames', 'bookmarks'))

def downloadbundle(repo, unknownbinhead):

    index = repo.bundlestore.index

    store = repo.bundlestore.store

    bundleid = index.getbundle(hex(unknownbinhead))

    if bundleid is None:

        raise error.Abort('%s head is not known' % hex(unknownbinhead))

    bundleraw = store.read(bundleid)

    return _makebundlefromraw(bundleraw)

def _makebundlefromraw(data):

    fp = None

    fd, bundlefile = tempfile.mkstemp()

    try:  # guards bundlefile

        try:  # guards fp

            fp = os.fdopen(fd, 'wb')

            fp.write(data)

        finally:

            fp.close()

    except Exception:

        try:

            os.unlink(bundlefile)

        except Exception:

            # we would rather see the original exception

            pass

        raise

    return bundlefile