468             tr.addfinalize('write-revbranchcache', self.write)

   468             tr.addfinalize('write-revbranchcache', self.write)

   469 

   469 

   470     def write(self, tr=None):

   470     def write(self, tr=None):

   471         """Save branch cache if it is dirty."""

   471         """Save branch cache if it is dirty."""

   472         repo = self._repo

   472         repo = self._repo

   474             if self._rbcnamescount < len(self._names):

   475             if self._rbcnamescount < len(self._names):

   475                 try:

   477                 try:

   476                     if self._rbcnamescount != 0:

   478                     if self._rbcnamescount != 0:

   477                         f = repo.vfs.open(_rbcnames, 'ab')

   479                         f = repo.vfs.open(_rbcnames, 'ab')

   478                         if f.tell() == self._rbcsnameslen:

   480                         if f.tell() == self._rbcsnameslen:

   479                             f.write('\0')

   481                             f.write('\0')

   499                     return

   501                     return

   500                 self._rbcnamescount = len(self._names)

   502                 self._rbcnamescount = len(self._names)

   501 

   503 

   502             start = self._rbcrevslen * _rbcrecsize

   504             start = self._rbcrevslen * _rbcrecsize

   503             if start != len(self._rbcrevs):

   505             if start != len(self._rbcrevs):

   504                 revs = min(len(repo.changelog),

   508                 revs = min(len(repo.changelog),

   505                            len(self._rbcrevs) // _rbcrecsize)

   509                            len(self._rbcrevs) // _rbcrecsize)

   506                 try:

   510                 try:

   507                     f = repo.vfs.open(_rbcrevs, 'ab')

   511                     f = repo.vfs.open(_rbcrevs, 'ab')

   508                     if f.tell() != start:

   512                     if f.tell() != start:

   519                 except (IOError, OSError, error.Abort) as inst:

   523                 except (IOError, OSError, error.Abort) as inst:

   520                     repo.ui.debug("couldn't write revision branch cache: %s\n" %

   524                     repo.ui.debug("couldn't write revision branch cache: %s\n" %

   521                                   inst)

   525                                   inst)

   522                     return

   526                     return

   523                 self._rbcrevslen = revs

   527                 self._rbcrevslen = revs