Mercurial > hg
view mercurial/wireproto.py @ 11791:00cde9bddbe4
repair: do not compress partial bundle if we do not keep it on disk
A partial bundle is created to temporarily save revisions > rev but
not descending from the node to strip, to be able to restore the
changesets after stripping the changelog.
Since this bundle is not kept after the strip operation, and is not
user-visible, it is not necessary and should be faster to avoid
compression.
author | Nicolas Dumazet <nicdumz.commits@gmail.com> |
---|---|
date | Thu, 12 Aug 2010 16:53:23 +0900 |
parents | 04f76a954842 |
children | 4e804302d30c |
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# wireproto.py - generic wire protocol support functions # # Copyright 2005-2010 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. import urllib, tempfile, os from i18n import _ from node import bin, hex import changegroup as changegroupmod import repo, error, encoding, util, store import pushkey as pushkey_ # list of nodes encoding / decoding def decodelist(l, sep=' '): return map(bin, l.split(sep)) def encodelist(l, sep=' '): return sep.join(map(hex, l)) # client side class wirerepository(repo.repository): def lookup(self, key): self.requirecap('lookup', _('look up remote revision')) d = self._call("lookup", key=key) success, data = d[:-1].split(" ", 1) if int(success): return bin(data) self._abort(error.RepoError(data)) def heads(self): d = self._call("heads") try: return decodelist(d[:-1]) except: self.abort(error.ResponseError(_("unexpected response:"), d)) def branchmap(self): d = self._call("branchmap") try: branchmap = {} for branchpart in d.splitlines(): branchname, branchheads = branchpart.split(' ', 1) branchname = urllib.unquote(branchname) # Earlier servers (1.3.x) send branch names in (their) local # charset. The best we can do is assume it's identical to our # own local charset, in case it's not utf-8. try: branchname.decode('utf-8') except UnicodeDecodeError: branchname = encoding.fromlocal(branchname) branchheads = decodelist(branchheads) branchmap[branchname] = branchheads return branchmap except TypeError: self._abort(error.ResponseError(_("unexpected response:"), d)) def branches(self, nodes): n = encodelist(nodes) d = self._call("branches", nodes=n) try: br = [tuple(decodelist(b)) for b in d.splitlines()] return br except: self._abort(error.ResponseError(_("unexpected response:"), d)) def between(self, pairs): batch = 8 # avoid giant requests r = [] for i in xrange(0, len(pairs), batch): n = " ".join([encodelist(p, '-') for p in pairs[i:i + batch]]) d = self._call("between", pairs=n) try: r.extend(l and decodelist(l) or [] for l in d.splitlines()) except: self._abort(error.ResponseError(_("unexpected response:"), d)) return r def pushkey(self, namespace, key, old, new): if not self.capable('pushkey'): return False d = self._call("pushkey", namespace=namespace, key=key, old=old, new=new) return bool(int(d)) def listkeys(self, namespace): if not self.capable('pushkey'): return {} d = self._call("listkeys", namespace=namespace) r = {} for l in d.splitlines(): k, v = l.split('\t') r[k.decode('string-escape')] = v.decode('string-escape') return r def stream_out(self): return self._callstream('stream_out') def changegroup(self, nodes, kind): n = encodelist(nodes) f = self._callstream("changegroup", roots=n) return self._decompress(f) def changegroupsubset(self, bases, heads, kind): self.requirecap('changegroupsubset', _('look up remote changes')) bases = encodelist(bases) heads = encodelist(heads) return self._decompress(self._callstream("changegroupsubset", bases=bases, heads=heads)) def unbundle(self, cg, heads, source): '''Send cg (a readable file-like object representing the changegroup to push, typically a chunkbuffer object) to the remote server as a bundle. Return an integer indicating the result of the push (see localrepository.addchangegroup()).''' ret, output = self._callpush("unbundle", cg, heads=encodelist(heads)) if ret == "": raise error.ResponseError( _('push failed:'), output) try: ret = int(ret) except ValueError, err: raise error.ResponseError( _('push failed (unexpected response):'), ret) for l in output.splitlines(True): self.ui.status(_('remote: '), l) return ret # server side class streamres(object): def __init__(self, gen): self.gen = gen class pushres(object): def __init__(self, res): self.res = res def dispatch(repo, proto, command): func, spec = commands[command] args = proto.getargs(spec) return func(repo, proto, *args) def between(repo, proto, pairs): pairs = [decodelist(p, '-') for p in pairs.split(" ")] r = [] for b in repo.between(pairs): r.append(encodelist(b) + "\n") return "".join(r) def branchmap(repo, proto): branchmap = repo.branchmap() heads = [] for branch, nodes in branchmap.iteritems(): branchname = urllib.quote(branch) branchnodes = encodelist(nodes) heads.append('%s %s' % (branchname, branchnodes)) return '\n'.join(heads) def branches(repo, proto, nodes): nodes = decodelist(nodes) r = [] for b in repo.branches(nodes): r.append(encodelist(b) + "\n") return "".join(r) def capabilities(repo, proto): caps = 'lookup changegroupsubset branchmap pushkey'.split() if _allowstream(repo.ui): caps.append('stream=%d' % repo.changelog.version) caps.append('unbundle=%s' % ','.join(changegroupmod.bundlepriority)) return ' '.join(caps) def changegroup(repo, proto, roots): nodes = decodelist(roots) cg = repo.changegroup(nodes, 'serve') return streamres(proto.groupchunks(cg)) def changegroupsubset(repo, proto, bases, heads): bases = decodelist(bases) heads = decodelist(heads) cg = repo.changegroupsubset(bases, heads, 'serve') return streamres(proto.groupchunks(cg)) def heads(repo, proto): h = repo.heads() return encodelist(h) + "\n" def hello(repo, proto): '''the hello command returns a set of lines describing various interesting things about the server, in an RFC822-like format. Currently the only one defined is "capabilities", which consists of a line in the form: capabilities: space separated list of tokens ''' return "capabilities: %s\n" % (capabilities(repo, proto)) def listkeys(repo, proto, namespace): d = pushkey_.list(repo, namespace).items() t = '\n'.join(['%s\t%s' % (k.encode('string-escape'), v.encode('string-escape')) for k, v in d]) return t def lookup(repo, proto, key): try: r = hex(repo.lookup(key)) success = 1 except Exception, inst: r = str(inst) success = 0 return "%s %s\n" % (success, r) def pushkey(repo, proto, namespace, key, old, new): r = pushkey_.push(repo, namespace, key, old, new) return '%s\n' % int(r) def _allowstream(ui): return ui.configbool('server', 'uncompressed', True, untrusted=True) def stream(repo, proto): '''If the server supports streaming clone, it advertises the "stream" capability with a value representing the version and flags of the repo it is serving. Client checks to see if it understands the format. The format is simple: the server writes out a line with the amount of files, then the total amount of bytes to be transfered (separated by a space). Then, for each file, the server first writes the filename and filesize (separated by the null character), then the file contents. ''' if not _allowstream(repo.ui): return '1\n' entries = [] total_bytes = 0 try: # get consistent snapshot of repo, lock during scan lock = repo.lock() try: repo.ui.debug('scanning\n') for name, ename, size in repo.store.walk(): entries.append((name, size)) total_bytes += size finally: lock.release() except error.LockError: return '2\n' # error: 2 def streamer(repo, entries, total): '''stream out all metadata files in repository.''' yield '0\n' # success repo.ui.debug('%d files, %d bytes to transfer\n' % (len(entries), total_bytes)) yield '%d %d\n' % (len(entries), total_bytes) for name, size in entries: repo.ui.debug('sending %s (%d bytes)\n' % (name, size)) # partially encode name over the wire for backwards compat yield '%s\0%d\n' % (store.encodedir(name), size) for chunk in util.filechunkiter(repo.sopener(name), limit=size): yield chunk return streamres(streamer(repo, entries, total_bytes)) def unbundle(repo, proto, heads): their_heads = decodelist(heads) def check_heads(): heads = repo.heads() return their_heads == ['force'] or their_heads == heads # fail early if possible if not check_heads(): return 'unsynced changes' # write bundle data to temporary file because it can be big fd, tempname = tempfile.mkstemp(prefix='hg-unbundle-') fp = os.fdopen(fd, 'wb+') r = 0 proto.redirect() try: proto.getfile(fp) lock = repo.lock() try: if not check_heads(): # someone else committed/pushed/unbundled while we # were transferring data return 'unsynced changes' # push can proceed fp.seek(0) header = fp.read(6) if header.startswith('HG'): if not header.startswith('HG10'): raise ValueError('unknown bundle version') elif header not in changegroupmod.bundletypes: raise ValueError('unknown bundle compression type') gen = changegroupmod.unbundle(header, fp) try: r = repo.addchangegroup(gen, 'serve', proto._client(), lock=lock) except util.Abort, inst: sys.stderr.write("abort: %s\n" % inst) finally: lock.release() return pushres(r) finally: fp.close() os.unlink(tempname) commands = { 'between': (between, 'pairs'), 'branchmap': (branchmap, ''), 'branches': (branches, 'nodes'), 'capabilities': (capabilities, ''), 'changegroup': (changegroup, 'roots'), 'changegroupsubset': (changegroupsubset, 'bases heads'), 'heads': (heads, ''), 'hello': (hello, ''), 'listkeys': (listkeys, 'namespace'), 'lookup': (lookup, 'key'), 'pushkey': (pushkey, 'namespace key old new'), 'stream_out': (stream, ''), 'unbundle': (unbundle, 'heads'), }