change lock format to let us detect and break stale locks. old style: symlink to pid new style: symlink to hostname:pid if lock code finds new-style lock, it breaks lock if locking pid is on same machine and pid is not alive. otherwise, lock is left alone. this makes locking code safe with old-style locks and with locks on other machines. new code makes server part of mercurial more robust in case machine crashes, power fails, or crazy user does kill -9.

#!/bin/sh
HG=hg
"$HG" init
mkdir b
echo 'Bouncy' >b/bouncy
echo 'tricycle' >b/vehicle
"$HG" add b/bouncy
"$HG" add b/vehicle
"$HG" commit -m 'Adding bouncy'
echo 'bouncy' >>b/bouncy
"$HG" commit -m 'Making it bouncier'
"$HG" update -C 0
echo 'stationary' >>b/vehicle
"$HG" commit -m 'Clarifying the vehicle.'
"$HG" update -C 1
chmod a-w b/vehicle
"$HG" update -m 2 2>&1 | sed 's|^\(.*[ 	]\).*/\([^/]*/[^/]*/[^/]*\)$|\1\2|g'