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'''Base class for store implementations and store-related utility code.'''
import os
import tempfile
import binascii
import re
from mercurial import util, node, error, url as url_, hg
from mercurial.i18n import _
import bfutil
import remotestore
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):
if self.url:
return ('%s: %s\n'
'(failed URL: %s)\n'
% (self.filename, self.detail, self.url))
else:
return ('%s: %s\n'
'(no default or default-push path set in hgrc)\n'
% (self.filename, self.detail))
def __str__(self):
return "%s: %s" % (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 under <filename>/<hash>.'''
raise NotImplementedError('abstract method')
def exists(self, hash):
'''Check to see if the store contains the given hash.'''
raise NotImplementedError('abstract method')
def get(self, files):
'''Get the specified big files 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 successfuly
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
for filename, hash in files:
ui.progress(_('getting kbfiles'), at, unit='kbfile',
total=len(files))
at += 1
ui.note(_('getting %s\n') % filename)
outfilename = self.repo.wjoin(filename)
destdir = os.path.dirname(outfilename)
util.makedirs(destdir)
if not os.path.isdir(destdir):
self.abort(error.RepoError(_('cannot create dest directory %s')
% destdir))
# No need to pass mode='wb' to fdopen(), since mkstemp() already
# opened the file in binary mode.
(tmpfd, tmpfilename) = tempfile.mkstemp(
dir=destdir, prefix=os.path.basename(filename))
tmpfile = os.fdopen(tmpfd, 'w')
try:
bhash = self._getfile(tmpfile, filename, hash)
except StoreError, err:
tmpfile.close()
ui.warn(err.longmessage())
os.remove(tmpfilename)
missing.append(filename)
continue
hhash = binascii.hexlify(bhash)
if hhash != hash:
ui.warn(_('%s: data corruption (expected %s, got %s)\n')
% (filename, hash, hhash))
os.remove(tmpfilename)
missing.append(filename)
else:
if os.path.exists(outfilename): # for windows
os.remove(outfilename)
os.rename(tmpfilename, outfilename)
bfutil.copytocache(self.repo, self.repo['.'].node(), filename,
True)
success.append((filename, hhash))
ui.progress(_('getting bfiles'), None)
return (success, missing)
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.'''
write = self.ui.write
failed = False
write(_('searching %d changesets for big files\n') % len(revs))
verified = set() # set of (filename, filenode) tuples
for rev in revs:
cctx = self.repo[rev]
cset = "%d:%s" % (cctx.rev(), node.short(cctx.node()))
for standin in cctx:
failed = (self._verifyfile(cctx,
cset,
contents,
standin,
verified)
or failed)
num_revs = len(verified)
num_bfiles = len(set([fname for (fname, fnode) in verified]))
if contents:
write(_('verified contents of %d revisions of %d big files\n')
% (num_revs, num_bfiles))
else:
write(_('verified existence of %d revisions of %d big files\n')
% (num_revs, num_bfiles))
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 binary 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 _verifyfile(self, cctx, cset, contents, standin, verified):
'''Perform the actual verification of a file in the store.
'''
raise NotImplementedError('abstract method')
import localstore, kilnstore, wirestore
_storeprovider = {
'file': [(localstore, 'localstore')],
'http': [(wirestore, 'wirestore'), (kilnstore, 'kilnstore')],
'https': [(wirestore, 'wirestore'), (kilnstore, 'kilnstore')],
'ssh': [(wirestore, 'wirestore')],
}
_scheme_re = re.compile(r'^([a-zA-Z0-9+-.]+)://')
# During clone this function is passed the src's ui object
# but it needs the dest's ui object so it can read out of
# the config file. Use repo.ui instead.
def _openstore(repo, remote=None, put=False):
ui = repo.ui
if not remote:
path = getattr(repo, 'bfpullsource', None) or \
ui.expandpath('default-push', 'default')
# If 'default-push' and 'default' can't be expanded
# they are just returned. In that case use the empty string which
# use the filescheme.
if path == 'default-push' or path == 'default':
path = ''
remote = repo
else:
remote = hg.peer(repo, {}, path)
# The path could be a scheme so use Mercurial's normal functionality
# to resolve the scheme to a repository and use its path
path = hasattr(remote, 'url') and remote.url() or remote.path
match = _scheme_re.match(path)
if not match: # regular filesystem path
scheme = 'file'
else:
scheme = match.group(1)
try:
storeproviders = _storeprovider[scheme]
except KeyError:
raise util.Abort(_('unsupported URL scheme %r') % scheme)
for (mod, klass) in storeproviders:
klass = getattr(mod, klass)
try:
return klass(ui, repo, remote)
except remotestore.storeprotonotcapable:
pass
raise util.Abort(_('%s does not appear to be a bfile store'), path)
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