Dont trap SIGHUP on the other OS
# HG changeset patch
# User Edouard Gomez <ed.gomez@free.fr>
# Node ID 34a547cb33fe515ef4cdc8ccd173546671253ae9
# Parent 8c89408a7154d2da94766e957a088407fd0fef93
Dont trap SIGHUP on the other OS
HG doesn't work anymore on the other OS since signals are trapped.
This is due to the fact that as explained in Python docs not all
signals are defined for all platforms, so python was complaning about
missing signal.SIGHUP.
# transaction.py - simple journalling scheme for mercurial
#
# This transaction scheme is intended to gracefully handle program
# errors and interruptions. More serious failures like system crashes
# can be recovered with an fsck-like tool. As the whole repository is
# effectively log-structured, this should amount to simply truncating
# anything that isn't referenced in the changelog.
#
# 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
import util
class transaction:
def __init__(self, report, opener, journal, after = None):
self.journal = None
# abort here if the journal already exists
if os.path.exists(journal):
raise "journal already exists - run hg recover"
self.report = report
self.opener = opener
self.after = after
self.entries = []
self.map = {}
self.journal = journal
self.file = open(self.journal, "w")
def __del__(self):
if self.journal:
if self.entries: self.abort()
self.file.close()
try: os.unlink(self.journal)
except: pass
def add(self, file, offset):
if file in self.map: return
self.entries.append((file, offset))
self.map[file] = 1
# add enough data to the journal to do the truncate
self.file.write("%s\0%d\n" % (file, offset))
self.file.flush()
def close(self):
self.file.close()
self.entries = []
if self.after:
util.rename(self.journal, self.after)
else:
os.unlink(self.journal)
self.journal = None
def abort(self):
if not self.entries: return
self.report("transaction abort!\n")
for f, o in self.entries:
try:
self.opener(f, "a").truncate(o)
except:
self.report("failed to truncate %s\n" % f)
self.entries = []
self.report("rollback completed\n")
def rollback(opener, file):
for l in open(file).readlines():
f, o = l.split('\0')
opener(f, "a").truncate(int(o))
os.unlink(file)