Create an atomic opener that does not automatically rename on close
The revlog.checkinlinesize() uses an atomic opener to replace the
index file after converting it from inline to traditional .i and .d
files. If this operation is interrupted, the atomic file class can
overwrite a valid file with a partially written one.
This patch introduces an atomic opener that does not automatically
replace the destination file with the tempfile. This way
an interrupted checkinlinesize() call turns into a noop.
# changelog.py - changelog class 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.
from revlog import *
from i18n import gettext as _
from demandload import demandload
demandload(globals(), "os time util")
class changelog(revlog):
def __init__(self, opener, defversion=0):
revlog.__init__(self, opener, "00changelog.i", "00changelog.d",
defversion)
def extract(self, text):
if not text:
return (nullid, "", (0, 0), [], "")
last = text.index("\n\n")
desc = text[last + 2:]
l = text[:last].splitlines()
manifest = bin(l[0])
user = l[1]
date = l[2].split(' ')
time = float(date.pop(0))
try:
# various tools did silly things with the time zone field.
timezone = int(date[0])
except:
timezone = 0
files = l[3:]
return (manifest, user, (time, timezone), files, desc)
def read(self, node):
return self.extract(self.revision(node))
def add(self, manifest, list, desc, transaction, p1=None, p2=None,
user=None, date=None):
if date:
# validate explicit (probably user-specified) date and
# time zone offset. values must fit in signed 32 bits for
# current 32-bit linux runtimes.
try:
when, offset = map(int, date.split(' '))
except ValueError:
raise ValueError(_('invalid date: %r') % date)
if abs(when) > 0x7fffffff:
raise ValueError(_('date exceeds 32 bits: %d') % when)
if abs(offset) >= 43200:
raise ValueError(_('impossible time zone offset: %d') % offset)
else:
date = "%d %d" % util.makedate()
list.sort()
l = [hex(manifest), user, date] + list + ["", desc]
text = "\n".join(l)
return self.addrevision(text, transaction, self.count(), p1, p2)