check export options for changeset before running
# HG changeset patch
# User shaleh@speakeasy.net
# Node ID 0cc64f4312540b2081c76dc589cc825d734676d8
# Parent f7bfe827ea381afc89f486b2d93d7f4fe86de04d
check export options for changeset before running
diff -r f7bfe827ea38 -r 0cc64f431254 mercurial/commands.py
# 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:
raise LockHeld(util.readlock(self.f))
def release(self):
if self.held:
self.held = 0
try:
os.unlink(self.f)
except: pass