view hgext/largefiles/wirestore.py @ 46580:2076df13d00f

copies-rust: refactor the "deletion" case

We rearrange the code to single out the case where information need to be
overwritten on both side of the merge. This open the way to better dealing with
this case.

Differential Revision: https://phab.mercurial-scm.org/D9651

# 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}