Mercurial > hg
view mercurial/streamclone.py @ 8746:84c44c9ed555
merge: combine three identical 'remote is newer' cases
author | Matt Mackall <mpm@selenic.com> |
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date | Mon, 08 Jun 2009 18:14:44 -0500 |
parents | 810387f59696 |
children | 0289f384e1e5 |
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# streamclone.py - streaming clone server support for mercurial # # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2, incorporated herein by reference. import util, error from i18n import _ from mercurial import store class StreamException(Exception): def __init__(self, code): Exception.__init__(self) self.code = code def __str__(self): return '%i\n' % self.code # if server supports streaming clone, it advertises "stream" # capability with value that is version+flags of repo it is serving. # client only streams if it can read that repo format. # stream file format is simple. # # server writes out line that says how many files, how many total # bytes. separator is ascii space, byte counts are strings. # # then for each file: # # server writes out line that says file name, how many bytes in # file. separator is ascii nul, byte count is string. # # server writes out raw file data. def stream_out(repo, untrusted=False): '''stream out all metadata files in repository. writes to file-like object, must support write() and optional flush().''' if not repo.ui.configbool('server', 'uncompressed', untrusted=untrusted): raise StreamException(1) 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(): # for backwards compat, name was partially encoded entries.append((store.encodedir(name), size)) total_bytes += size finally: lock.release() except error.LockError: raise StreamException(2) yield '0\n' 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)) yield '%s\0%d\n' % (name, size) for chunk in util.filechunkiter(repo.sopener(name), limit=size): yield chunk