Show revisions in diffs like CVS, based on a patch from Goffredo Baroncelli.
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Show revisions in diffs like CVS, based on a patch from Goffredo Baroncelli.
Changes from the original patch:
- - Use 'diff -r ...' instead of 'hg diff -r ...' to support filetype detection
by at least file(1) and vim.
- - Adjusted tests for this change.
- - Some cleanups.
manifest hash: 5f37d1ef75ea7f4e48b53f02371053ba54fb70f8
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# 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
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:
os.symlink(str(pid), self.f)
self.held = 1
except:
raise LockHeld(os.readlink(self.f))
def release(self):
if self.held:
self.held = 0
os.unlink(self.f)