largefiles: fix cat for largefiles (issue3352)
This is a fix to largefiles so that 'hg cat' will work correctly when a
largefile is specified.
As per discussion on Issue 3352:
1) The file will be printed regardless if it is binary or large.
2) The file is downloaded if it is not readily available (not found in
the system cache), so that it can be printed. If the download fails,
then we abort.
# 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'''
import os
from mercurial import util
from mercurial.i18n import _
import lfutil
import basestore
class localstore(basestore.basestore):
'''localstore first attempts to grab files out of the store in the remote
Mercurial repository. Failling that, it attempts to grab the files from
the user cache.'''
def __init__(self, ui, repo, remote):
url = os.path.join(remote.path, '.hg', lfutil.longname)
super(localstore, self).__init__(ui, repo, util.expandpath(url))
self.remote = remote
def put(self, source, hash):
util.makedirs(os.path.dirname(lfutil.storepath(self.remote, hash)))
if lfutil.instore(self.remote, hash):
return
lfutil.link(lfutil.storepath(self.repo, hash),
lfutil.storepath(self.remote, hash))
def exists(self, hash):
return lfutil.instore(self.remote, hash)
def _getfile(self, tmpfile, filename, hash):
if lfutil.instore(self.remote, hash):
path = lfutil.storepath(self.remote, hash)
elif lfutil.inusercache(self.ui, hash):
path = lfutil.usercachepath(self.ui, hash)
else:
raise basestore.StoreError(filename, hash, '',
_("Can't get file locally"))
fd = open(path, 'rb')
try:
return lfutil.copyandhash(fd, tmpfile)
finally:
fd.close()
def _verifyfile(self, cctx, cset, contents, standin, verified):
filename = lfutil.splitstandin(standin)
if not filename:
return False
fctx = cctx[standin]
key = (filename, fctx.filenode())
if key in verified:
return False
expecthash = fctx.data()[0:40]
verified.add(key)
if not lfutil.instore(self.remote, expecthash):
self.ui.warn(
_('changeset %s: %s missing\n'
' (looked for hash %s)\n')
% (cset, filename, expecthash))
return True # failed
if contents:
storepath = lfutil.storepath(self.remote, expecthash)
actualhash = lfutil.hashfile(storepath)
if actualhash != expecthash:
self.ui.warn(
_('changeset %s: %s: contents differ\n'
' (%s:\n'
' expected hash %s,\n'
' but got %s)\n')
% (cset, filename, storepath, expecthash, actualhash))
return True # failed
return False