/usr/lib/python2.7/dist-packages/hgext/largefiles/basestore.py is in mercurial-common 4.5.3-1ubuntu2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | # 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.
'''base class for store implementations and store-related utility code'''
from __future__ import absolute_import
from mercurial.i18n import _
from mercurial import node, util
from . import lfutil
class StoreError(Exception):
'''Raised when there is a problem getting files from or putting
files to a central store.'''
def __init__(self, filename, hash, url, detail):
self.filename = filename
self.hash = hash
self.url = url
self.detail = detail
def longmessage(self):
return (_("error getting id %s from url %s for file %s: %s\n") %
(self.hash, util.hidepassword(self.url), self.filename,
self.detail))
def __str__(self):
return "%s: %s" % (util.hidepassword(self.url), self.detail)
class basestore(object):
def __init__(self, ui, repo, url):
self.ui = ui
self.repo = repo
self.url = url
def put(self, source, hash):
'''Put source file into the store so it can be retrieved by hash.'''
raise NotImplementedError('abstract method')
def exists(self, hashes):
'''Check to see if the store contains the given hashes. Given an
iterable of hashes it returns a mapping from hash to bool.'''
raise NotImplementedError('abstract method')
def get(self, files):
'''Get the specified largefiles from the store and write to local
files under repo.root. files is a list of (filename, hash)
tuples. Return (success, missing), lists of files successfully
downloaded and those not found in the store. success is a list
of (filename, hash) tuples; missing is a list of filenames that
we could not get. (The detailed error message will already have
been presented to the user, so missing is just supplied as a
summary.)'''
success = []
missing = []
ui = self.ui
at = 0
available = self.exists(set(hash for (_filename, hash) in files))
for filename, hash in files:
ui.progress(_('getting largefiles'), at, unit=_('files'),
total=len(files))
at += 1
ui.note(_('getting %s:%s\n') % (filename, hash))
if not available.get(hash):
ui.warn(_('%s: largefile %s not available from %s\n')
% (filename, hash, util.hidepassword(self.url)))
missing.append(filename)
continue
if self._gethash(filename, hash):
success.append((filename, hash))
else:
missing.append(filename)
ui.progress(_('getting largefiles'), None)
return (success, missing)
def _gethash(self, filename, hash):
"""Get file with the provided hash and store it in the local repo's
store and in the usercache.
filename is for informational messages only.
"""
util.makedirs(lfutil.storepath(self.repo, ''))
storefilename = lfutil.storepath(self.repo, hash)
tmpname = storefilename + '.tmp'
with util.atomictempfile(tmpname,
createmode=self.repo.store.createmode) as tmpfile:
try:
gothash = self._getfile(tmpfile, filename, hash)
except StoreError as err:
self.ui.warn(err.longmessage())
gothash = ""
if gothash != hash:
if gothash != "":
self.ui.warn(_('%s: data corruption (expected %s, got %s)\n')
% (filename, hash, gothash))
util.unlink(tmpname)
return False
util.rename(tmpname, storefilename)
lfutil.linktousercache(self.repo, hash)
return True
def verify(self, revs, contents=False):
'''Verify the existence (and, optionally, contents) of every big
file revision referenced by every changeset in revs.
Return 0 if all is well, non-zero on any errors.'''
self.ui.status(_('searching %d changesets for largefiles\n') %
len(revs))
verified = set() # set of (filename, filenode) tuples
filestocheck = [] # list of (cset, filename, expectedhash)
for rev in revs:
cctx = self.repo[rev]
cset = "%d:%s" % (cctx.rev(), node.short(cctx.node()))
for standin in cctx:
filename = lfutil.splitstandin(standin)
if filename:
fctx = cctx[standin]
key = (filename, fctx.filenode())
if key not in verified:
verified.add(key)
expectedhash = lfutil.readasstandin(fctx)
filestocheck.append((cset, filename, expectedhash))
failed = self._verifyfiles(contents, filestocheck)
numrevs = len(verified)
numlfiles = len(set([fname for (fname, fnode) in verified]))
if contents:
self.ui.status(
_('verified contents of %d revisions of %d largefiles\n')
% (numrevs, numlfiles))
else:
self.ui.status(
_('verified existence of %d revisions of %d largefiles\n')
% (numrevs, numlfiles))
return int(failed)
def _getfile(self, tmpfile, filename, hash):
'''Fetch one revision of one file from the store and write it
to tmpfile. Compute the hash of the file on-the-fly as it
downloads and return the hash. Close tmpfile. Raise
StoreError if unable to download the file (e.g. it does not
exist in the store).'''
raise NotImplementedError('abstract method')
def _verifyfiles(self, contents, filestocheck):
'''Perform the actual verification of files in the store.
'contents' controls verification of content hash.
'filestocheck' is list of files to check.
Returns _true_ if any problems are found!
'''
raise NotImplementedError('abstract method')
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