Changes to network protocol
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Changes to network protocol
Stream changes at the delta level rather than at whole delta groups
this breaks the protocol - we now send a zero byte delta to indicate
the end of a group rather than sending the entire group length up front
Fix filename length asymmetry while we're breaking things
Fix hidden O(n^2) bug in calculating changegroup
list.append(e) is O(n), list + [element] is not
Decompress chunks on read in revlog.group()
Improve status messages
report bytes transferred
report nothing to do
Deal with /dev/null path brokenness
Remove untriggered patch assertion
manifest hash: 3eedcfe878561f9eb4adedb04f6be618fb8ae8d8
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.0 (GNU/Linux)
iD8DBQFCmzlqywK+sNU5EO8RAn0KAJ4z4toWSSGjLoZO6FKWLx/3QbZufACglQgd
S48bumc++DnuY1iPSNWKGAI=
=lCjx
-----END PGP SIGNATURE-----
# transaction.py - simple journalling scheme for mercurial
#
# This transaction scheme is intended to gracefully handle program
# errors and interruptions. More serious failures like system crashes
# can be recovered with an fsck-like tool. As the whole repository is
# effectively log-structured, this should amount to simply truncating
# anything that isn't referenced in the changelog.
#
# Copyright 2005 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
import os
class transaction:
def __init__(self, opener, journal, after = None):
self.journal = None
# abort here if the journal already exists
if os.path.exists(journal):
raise "journal already exists - run hg recover"
self.opener = opener
self.after = after
self.entries = []
self.map = {}
self.journal = journal
self.file = open(self.journal, "w")
def __del__(self):
if self.entries: self.abort()
try: os.unlink(self.journal)
except: pass
def add(self, file, offset):
if file in self.map: return
self.entries.append((file, offset))
self.map[file] = 1
# add enough data to the journal to do the truncate
self.file.write("%s\0%d\n" % (file, offset))
self.file.flush()
def close(self):
self.file.close()
self.entries = []
if self.after:
os.rename(self.journal, self.after)
else:
os.unlink(self.journal)
def abort(self):
if not self.entries: return
print "transaction abort!"
for f, o in self.entries:
try:
self.opener(f, "a").truncate(o)
except:
print "failed to truncate", f
self.entries = []
print "rollback completed"
def rollback(opener, file):
for l in open(file).readlines():
f, o = l.split('\0')
opener(f, "a").truncate(int(o))
os.unlink(file)