Mercurial > hg
view mercurial/streamclone.py @ 10377:04e1e6743809
streamclone: allow uncompressed clones by default
author | Matt Mackall <mpm@selenic.com> |
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date | Sun, 07 Feb 2010 15:31:53 +0100 |
parents | 25e572394f5c |
children | 1a8df80dfdde |
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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 or any later version. 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 filename, how many bytes in # file. separator is ascii nul, byte count is string. # # server writes out raw file data. def allowed(ui): return ui.configbool('server', 'uncompressed', untrusted=True) def stream_out(repo): '''stream out all metadata files in repository. writes to file-like object, must support write() and optional flush().''' if not allowed(repo.ui): 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(): entries.append((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)) # 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