Mercurial > hg
view mercurial/lock.py @ 402:2fe8d66e3075
[PATCH] (3/4) Removing an added file
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[PATCH] (3/4) Removing an added file
From: Michael A Fetterman <Michael.Fetterman@cl.cam.ac.uk>
Here's an hg changeset that deals with "hg add"ing and then "hg remove"ing
a file without ever committing it. Previously, this caused a python
exception
at commit time.
Test case included in the patch.
manifest hash: 4d012f3f8b1aa664fed9e8bc2849931b28728acd
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author | mpm@selenic.com |
---|---|
date | Tue, 21 Jun 2005 17:50:37 -0800 |
parents | 0b4c5cb953d9 |
children | 10c43444a38e 688d03d6997a |
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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)