view hgext/largefiles/wirestore.py @ 44465:75ada5fe9b62

hghave: add a `rust` keyword to detect the use of compiled rust code

The content of some on disk cache can varies when using rust (because it is
faster to do so in the rust variant). So we need to be able to detect this case
for some test.

Differential Revision: https://phab.mercurial-scm.org/D8162

# 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(b'largefiles')
        if not cap:
            raise lfutil.storeprotonotcapable([])
        storetypes = cap.split(b',')
        if b'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.'''

        with self.remote.commandexecutor() as e:
            fs = []
            for hash in hashes:
                fs.append((hash, e.callcommand(b'statlfile', {b'sha': hash,})))

            return {hash: f.result() for hash, f in fs}