Mercurial > hg
view mercurial/streamclone.py @ 5481:003d1f174fe1
Fix Windows os.popen bug with interleaved stdout/stderr output
See python bug 1366 "popen spawned process may not write to stdout under windows" for more details.
author | Patrick Mezard <pmezard@gmail.com> |
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date | Thu, 01 Nov 2007 12:05:14 +0100 |
parents | a58d415b272e |
children | e75aab656f46 |
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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, osutil, 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): for e, kind, st in osutil.listdir(path, stat=True): pe = os.path.join(path, e) if kind == stat.S_IFDIR: if recurse: for x in walk(pe, True): yield x else: if kind != stat.S_IFREG 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. repolock = 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()