hgext/largefiles/wirestore.py

dagutil: use a listcomp instead of a map()

In Python 3, the map() returns a generator object instead of a list,
and some parts of hg depend on this being consumable more than once or
sortable in place.

Differential Revision: https://phab.mercurial-scm.org/D1099

# Copyright 2010-2011 Fog Creek Software
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''largefile store working over Mercurial's wire protocol'''
from __future__ import absolute_import

from . import (
    lfutil,
    remotestore,
)

class wirestore(remotestore.remotestore):
    def __init__(self, ui, repo, remote):
        cap = remote.capable('largefiles')
        if not cap:
            raise lfutil.storeprotonotcapable([])
        storetypes = cap.split(',')
        if 'serve' not in storetypes:
            raise lfutil.storeprotonotcapable(storetypes)
        self.remote = remote
        super(wirestore, self).__init__(ui, repo, remote.url())

    def _put(self, hash, fd):
        return self.remote.putlfile(hash, fd)

    def _get(self, hash):
        return self.remote.getlfile(hash)

    def _stat(self, hashes):
        '''For each hash, return 0 if it is available, other values if not.
        It is usually 2 if the largefile is missing, but might be 1 the server
        has a corrupted copy.'''
        batch = self.remote.iterbatch()
        for hash in hashes:
            batch.statlfile(hash)
        batch.submit()
        return dict(zip(hashes, batch.results()))