Mercurial > hg > mercurial-crew-with-dirclash
view mercurial/streamclone.py @ 5338:f87685355c9c
revlog: fix revlogio.packentry corner case
We want to store version information about the revlog in the first
entry of its index. The code in packentry was using some heuristics
to detect whether this was the first entry, but these heuristics could
fail in some cases (e.g. rev 0 was empty; rev 1 descends directly from
the nullid and is stored as a delta).
We now give the revision number to packentry to avoid heuristics.
author | Alexis S. L. Carvalho <alexis@cecm.usp.br> |
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date | Wed, 26 Sep 2007 01:58:45 -0300 |
parents | 97b734fb9c6f |
children | 5105b119edd2 |
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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, incorporated herein by reference. from i18n import _ import os, stat, util, lock # 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. def walkrepo(root): '''iterate over metadata files in repository. walk in natural (sorted) order. yields 2-tuples: name of .d or .i file, size of file.''' strip_count = len(root) + len(os.sep) def walk(path, recurse): ents = os.listdir(path) ents.sort() for e in ents: pe = os.path.join(path, e) st = os.lstat(pe) if stat.S_ISDIR(st.st_mode): if recurse: for x in walk(pe, True): yield x else: if not stat.S_ISREG(st.st_mode) or len(e) < 2: continue sfx = e[-2:] if sfx in ('.d', '.i'): yield pe[strip_count:], st.st_size # write file data first for x in walk(os.path.join(root, 'data'), True): yield x # write manifest before changelog meta = list(walk(root, False)) meta.sort() meta.reverse() for x in meta: yield x # 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, fileobj, 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): fileobj.write('1\n') return # get consistent snapshot of repo. lock during scan so lock not # needed while we stream, and commits can happen. lock = None try: try: repolock = repo.lock() except (lock.LockHeld, lock.LockUnavailable), inst: repo.ui.warn('locking the repository failed: %s\n' % (inst,)) fileobj.write('2\n') return fileobj.write('0\n') repo.ui.debug('scanning\n') entries = [] total_bytes = 0 for name, size in walkrepo(repo.spath): name = repo.decodefn(util.pconvert(name)) entries.append((name, size)) total_bytes += size finally: del repolock repo.ui.debug('%d files, %d bytes to transfer\n' % (len(entries), total_bytes)) fileobj.write('%d %d\n' % (len(entries), total_bytes)) for name, size in entries: repo.ui.debug('sending %s (%d bytes)\n' % (name, size)) fileobj.write('%s\0%d\n' % (name, size)) for chunk in util.filechunkiter(repo.sopener(name), limit=size): fileobj.write(chunk) flush = getattr(fileobj, 'flush', None) if flush: flush()