Mercurial > hg > mercurial-crew-with-dirclash

comparison mercurial/revlog.py @ 1784:2e0a288ca93e

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revalidate revlog data after locking the repo (issue132)
author Benoit Boissinot <benoit.boissinot@ens-lyon.org>
date Wed, 22 Feb 2006 07:26:29 +0100
parents d457fec76ab0
children 5ac811b720de
comparison
equal deleted inserted replaced
1783:35a05f177267 1784:2e0a288ca93e
11 """ 11 """
12 12
13 from node import * 13 from node import *
14 from i18n import gettext as _ 14 from i18n import gettext as _
15 from demandload import demandload 15 from demandload import demandload
16 demandload(globals(), "binascii errno heapq mdiff sha struct zlib") 16 demandload(globals(), "binascii errno heapq mdiff os sha struct zlib")
17 17
18 def hash(text, p1, p2): 18 def hash(text, p1, p2):
19 """generate a hash from the given text and its parent hashes 19 """generate a hash from the given text and its parent hashes
20 20
21 This hash combines both the current file contents and its history 21 This hash combines both the current file contents and its history
185 and can be used to implement COW semantics or the like. 185 and can be used to implement COW semantics or the like.
186 """ 186 """
187 self.indexfile = indexfile 187 self.indexfile = indexfile
188 self.datafile = datafile 188 self.datafile = datafile
189 self.opener = opener 189 self.opener = opener
190
191 self.indexstat = None
190 self.cache = None 192 self.cache = None
191 self.chunkcache = None 193 self.chunkcache = None
192 194 self.load()
195
196 def load(self):
193 try: 197 try:
194 i = self.opener(self.indexfile).read() 198 f = self.opener(self.indexfile)
195 except IOError, inst: 199 except IOError, inst:
196 if inst.errno != errno.ENOENT: 200 if inst.errno != errno.ENOENT:
197 raise 201 raise
198 i = "" 202 i = ""
203 else:
204 try:
205 st = os.fstat(f.fileno())
206 except AttributeError, inst:
207 st = None
208 else:
209 oldst = self.indexstat
210 if (oldst and st.st_dev == oldst.st_dev
211 and st.st_ino == oldst.st_ino
212 and st.st_mtime == oldst.st_mtime
213 and st.st_ctime == oldst.st_ctime):
214 return
215 self.indexstat = st
216 i = f.read()
199 217
200 if i and i[:4] != "\0\0\0\0": 218 if i and i[:4] != "\0\0\0\0":
201 raise RevlogError(_("incompatible revlog signature on %s") % 219 raise RevlogError(_("incompatible revlog signature on %s") %
202 self.indexfile) 220 self.indexfile)
203 221