hgext/largefiles/localstore.py

merge-actions: have an attribute for narrow safetiness

This allow the core doing narrow filtering to process action without
explicitely listing all possible actions. This is important to make the actions
system more flexible in the future.

Differential Revision: https://phab.mercurial-scm.org/D12117

# Copyright 2009-2010 Gregory P. Ward
# Copyright 2009-2010 Intelerad Medical Systems Incorporated
# Copyright 2010-2011 Fog Creek Software
# Copyright 2010-2011 Unity Technologies
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''store class for local filesystem'''
from __future__ import absolute_import

from mercurial.i18n import _
from mercurial.pycompat import open
from mercurial import util

from . import (
    basestore,
    lfutil,
)


class localstore(basestore.basestore):
    """localstore first attempts to grab files out of the store in the remote
    Mercurial repository.  Failing that, it attempts to grab the files from
    the user cache."""

    def __init__(self, ui, repo, remote):
        self.remote = remote.local()
        super(localstore, self).__init__(ui, repo, self.remote.url())

    def put(self, source, hash):
        if lfutil.instore(self.remote, hash):
            return
        lfutil.link(source, lfutil.storepath(self.remote, hash))

    def exists(self, hashes):
        retval = {}
        for hash in hashes:
            retval[hash] = lfutil.instore(self.remote, hash)
        return retval

    def _getfile(self, tmpfile, filename, hash):
        path = lfutil.findfile(self.remote, hash)
        if not path:
            raise basestore.StoreError(
                filename, hash, self.url, _(b"can't get file locally")
            )
        with open(path, b'rb') as fd:
            return lfutil.copyandhash(util.filechunkiter(fd), tmpfile)

    def _verifyfiles(self, contents, filestocheck):
        failed = False
        for cset, filename, expectedhash in filestocheck:
            storepath, exists = lfutil.findstorepath(self.repo, expectedhash)
            if not exists:
                storepath, exists = lfutil.findstorepath(
                    self.remote, expectedhash
                )
            if not exists:
                self.ui.warn(
                    _(b'changeset %s: %s references missing %s\n')
                    % (cset, filename, storepath)
                )
                failed = True
            elif contents:
                actualhash = lfutil.hashfile(storepath)
                if actualhash != expectedhash:
                    self.ui.warn(
                        _(b'changeset %s: %s references corrupted %s\n')
                        % (cset, filename, storepath)
                    )
                    failed = True
        return failed