# 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''' import os import tempfile import binascii import re from mercurial import util, node, hg from mercurial.i18n import _ 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): 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 /.''' 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 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 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 largefiles'), at, unit='lfile', total=len(files)) at += 1 ui.note(_('getting %s:%s\n') % (filename, hash)) storefilename = lfutil.storepath(self.repo, hash) storedir = os.path.dirname(storefilename) # No need to pass mode='wb' to fdopen(), since mkstemp() already # opened the file in binary mode. (tmpfd, tmpfilename) = tempfile.mkstemp( dir=storedir, prefix=os.path.basename(filename)) tmpfile = os.fdopen(tmpfd, 'w') try: hhash = binascii.hexlify(self._getfile(tmpfile, filename, hash)) except StoreError, err: ui.warn(err.longmessage()) hhash = "" if hhash != hash: if hhash != "": ui.warn(_('%s: data corruption (expected %s, got %s)\n') % (filename, hash, hhash)) tmpfile.close() # no-op if it's already closed os.remove(tmpfilename) missing.append(filename) continue if os.path.exists(storefilename): # Windows os.remove(storefilename) os.rename(tmpfilename, storefilename) lfutil.linktousercache(self.repo, hash) success.append((filename, hhash)) ui.progress(_('getting largefiles'), 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 largefiles\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())) failed = util.any(self._verifyfile( cctx, cset, contents, standin, verified) for standin in cctx) num_revs = len(verified) num_lfiles = len(set([fname for (fname, fnode) in verified])) if contents: write(_('verified contents of %d revisions of %d largefiles\n') % (num_revs, num_lfiles)) else: write(_('verified existence of %d revisions of %d largefiles\n') % (num_revs, num_lfiles)) 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, wirestore _storeprovider = { 'file': [localstore.localstore], 'http': [wirestore.wirestore], 'https': [wirestore.wirestore], '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, 'lfpullsource', None) or ui.expandpath('default-push', 'default')) # ui.expandpath() leaves 'default-push' and 'default' alone if # they cannot be expanded: fallback to the empty string, # meaning the current directory. 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 = util.safehasattr(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 class_obj in storeproviders: try: return class_obj(ui, repo, remote) except lfutil.storeprotonotcapable: pass raise util.Abort(_('%s does not appear to be a largefile store') % path)