extend network protocol to stop clients from locking servers
now all repositories have capabilities slot, tuple with list of names.
if 'unbundle' capability present, repo supports push where client does
not need to lock server. repository classes that have unbundle capability
also have unbundle method.
implemented for ssh now, will be base for push over http.
unbundle protocol acts this way. server tells client what heads it
has during normal negotiate step. client starts unbundle by repeat
server's heads back to it. if server has new heads, abort immediately.
otherwise, transfer changes to server. once data transferred, server
locks and checks heads again. if heads same, changes can be added.
else someone else added heads, and server aborts.
if client wants to force server to add heads, sends special heads list of
'force'.
#!/bin/sh
#
# revlog.parseindex must be able to parse the index file even if
# an index entry is split between two 64k blocks. The ideal test
# would be to create an index file with inline data where
# 64k < size < 64k + 64 (64k is the size of the read buffer, 64 is
# the size of an index entry) and with an index entry starting right
# before the 64k block boundary, and try to read it.
#
# We approximate that by reducing the read buffer to 1 byte.
#
hg init a
cd a
echo abc > foo
hg add foo
hg commit -m 'add foo' -d '1000000 0'
echo >> foo
hg commit -m 'change foo' -d '1000001 0'
hg log -r 0:
cat >> test.py << EOF
from mercurial import changelog, util
from mercurial.node import *
class singlebyteread(object):
def __init__(self, real):
self.real = real
def read(self, size=-1):
if size == 65536:
size = 1
return self.real.read(size)
def __getattr__(self, key):
return getattr(self.real, key)
def opener(*args):
o = util.opener(*args)
def wrapper(*a):
f = o(*a)
return singlebyteread(f)
return wrapper
cl = changelog.changelog(opener('.hg'))
print cl.count(), 'revisions:'
for r in xrange(cl.count()):
print short(cl.node(r))
EOF
python test.py