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
http_proxy= hg clone static-http://localhost:20059/ copy
echo $?
ls copy 2>/dev/null || echo copy: No such file or directory
# This server doesn't do range requests so it's basically only good for
# one pull
cat > dumb.py <<EOF
import BaseHTTPServer, SimpleHTTPServer, signal
def run(server_class=BaseHTTPServer.HTTPServer,
handler_class=SimpleHTTPServer.SimpleHTTPRequestHandler):
server_address = ('localhost', 20059)
httpd = server_class(server_address, handler_class)
httpd.serve_forever()
signal.signal(signal.SIGTERM, lambda x: sys.exit(0))
run()
EOF
python dumb.py 2>/dev/null &
mkdir remote
cd remote
hg init
echo foo > bar
hg add bar
hg commit -m"test" -d "1000000 0"
hg tip
cd ..
http_proxy= hg clone static-http://localhost:20059/remote local
cd local
hg verify
cat bar
http_proxy= hg pull
kill $!