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comparison mercurial/revlog.py @ 653:94cdd02792b5

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Fix corruption resulting from skipping parts of a revision group -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Fix corruption resulting from skipping parts of a revision group We were occassionally losing track of what revision a delta applied to when we skipped over deltas we already had and applying the delta against the wrong base. This could result in coredumps from mpatch, consistency errors, or failed verify. manifest hash: fcf20a8abfd81f08fae2398136b2ed66216b2083 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (GNU/Linux) iD8DBQFCzu5SywK+sNU5EO8RAi10AJ9cqIfQzOzbcdH36t1LR/rY+UMtHwCeM79p Dtv+Jh0McLZr6nf4iJyhDgI= =5o6U -----END PGP SIGNATURE-----
author Matt Mackall <mpm@selenic.com>
date Fri, 08 Jul 2005 13:21:22 -0800
parents 08b65d66f3e7
children b3bba126b04a
comparison
equal deleted inserted replaced
652:a54a1c101a9a 653:94cdd02792b5
473 # track the base of the current delta log 473 # track the base of the current delta log
474 r = self.count() 474 r = self.count()
475 t = r - 1 475 t = r - 1
476 node = nullid 476 node = nullid
477 477
478 base = prev = -1 478 base = -1
479 start = end = 0 479 start = end = measure = 0
480 if r: 480 if r:
481 start = self.start(self.base(t)) 481 start = self.start(self.base(t))
482 end = self.end(t) 482 end = self.end(t)
483 measure = self.length(self.base(t)) 483 measure = self.length(self.base(t))
484 base = self.base(t) 484 base = self.base(t)
489 dfh = self.opener(self.datafile, "a") 489 dfh = self.opener(self.datafile, "a")
490 ifh = self.opener(self.indexfile, "a") 490 ifh = self.opener(self.indexfile, "a")
491 491
492 # loop through our set of deltas 492 # loop through our set of deltas
493 chain = None 493 chain = None
494 prev = self.tip()
494 for chunk in revs: 495 for chunk in revs:
495 node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80]) 496 node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80])
496 link = linkmapper(cs) 497 link = linkmapper(cs)
497 if node in self.nodemap: 498 if node in self.nodemap:
498 # this can happen if two branches make the same change 499 # this can happen if two branches make the same change
499 if unique: 500 if unique:
500 raise "already have %s" % hex(node[:4]) 501 raise "already have %s" % hex(node[:4])
502 chain = node
501 continue 503 continue
502 delta = chunk[80:] 504 delta = chunk[80:]
503 505
504 if not chain: 506 if not chain:
505 # retrieve the parent revision of the delta chain 507 # retrieve the parent revision of the delta chain