view hgext/win32text.py @ 1877:d314a89fa4f1

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.

import mercurial.util

def dumbdecode(s, cmd):
    return s.replace('\n', '\r\n')

def dumbencode(s, cmd):
    return s.replace('\r\n', '\n')

def clevertest(s, cmd):
    if '\0' in s: return False
    return True

def cleverdecode(s, cmd):
    if clevertest(s, cmd):
        return dumbdecode(s, cmd)
    return s

def cleverencode(s, cmd):
    if clevertest(s, cmd):
        return dumbencode(s, cmd)
    return s

mercurial.util.filtertable.update({
    'dumbdecode:': dumbdecode,
    'dumbencode:': dumbencode,
    'cleverdecode:': cleverdecode,
    'cleverencode:': cleverencode,
    })