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
hg init test
cd test
echo 0 > afile
hg add afile
hg commit -m "0.0" -d "1000000 0"
echo 1 >> afile
hg commit -m "0.1" -d "1000000 0"
echo 2 >> afile
hg commit -m "0.2" -d "1000000 0"
echo 3 >> afile
hg commit -m "0.3" -d "1000000 0"
hg update -C 0
echo 1 >> afile
hg commit -m "1.1" -d "1000000 0"
echo 2 >> afile
hg commit -m "1.2" -d "1000000 0"
echo "a line" > fred
echo 3 >> afile
hg add fred
hg commit -m "1.3" -d "1000000 0"
hg mv afile adifferentfile
hg commit -m "1.3m" -d "1000000 0"
hg update -C 3
hg mv afile anotherfile
hg commit -m "0.3m" -d "1000000 0"
hg verify
cd ..
hg init empty
hg -R test bundle full.hg empty
hg -R test unbundle full.hg
hg -R empty unbundle full.hg
hg -R empty heads
hg -R empty verify
rm -rf empty
hg init empty
cd empty
hg -R bundle://../full.hg log
#doesn't work (yet ?)
#hg -R bundle://../full.hg verify
hg pull bundle://../full.hg
cd ..
rm -rf empty
hg init empty
hg clone -r 3 test partial
hg clone partial partial2
cd partial
hg -R bundle://../full.hg log
hg incoming bundle://../full.hg
hg -R bundle://../full.hg outgoing ../partial2
cd ..