hgk is a wish script
--- mercurial-0.7.orig/contrib/hgk 2005-09-23 11:02:21.000000000 +0200
+++ mercurial-0.7/contrib/hgk 2005-09-23 11:07:57.000000000 +0200
@@ -1,6 +1,4 @@
-#!/bin/sh
-# Tcl ignores the next line -*- tcl -*- \
-exec wish "$0" -- "${1+$@}"
+#!/usr/bin/wish
# Copyright (C) 2005 Paul Mackerras. All rights reserved.
# This program is free software; it may be used, copied, modified
# lock.py - simple locking scheme for mercurial
#
# Copyright 2005 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
import os, time
import util
class LockHeld(Exception):
pass
class lock:
def __init__(self, file, wait=1):
self.f = file
self.held = 0
self.wait = wait
self.lock()
def __del__(self):
self.release()
def lock(self):
while 1:
try:
self.trylock()
return 1
except LockHeld, inst:
if self.wait:
time.sleep(1)
continue
raise inst
def trylock(self):
pid = os.getpid()
try:
util.makelock(str(pid), self.f)
self.held = 1
except (OSError, IOError):
raise LockHeld(util.readlock(self.f))
def release(self):
if self.held:
self.held = 0
try:
os.unlink(self.f)
except: pass