1561 

  1562 class manifest(manifestrevlog):

  1563     def __init__(self, opener, dir='', dirlogcache=None):

  1564         '''The 'dir' and 'dirlogcache' arguments are for internal use by

  1565         manifest.manifest only. External users should create a root manifest

  1566         log with manifest.manifest(opener) and call dirlog() on it.

  1567         '''

  1568         # During normal operations, we expect to deal with not more than four

  1569         # revs at a time (such as during commit --amend). When rebasing large

  1570         # stacks of commits, the number can go up, hence the config knob below.

  1571         cachesize = 4

  1572         usetreemanifest = False

  1573         opts = getattr(opener, 'options', None)

  1574         if opts is not None:

  1575             cachesize = opts.get('manifestcachesize', cachesize)

  1576             usetreemanifest = opts.get('treemanifest', usetreemanifest)

  1577         self._mancache = util.lrucachedict(cachesize)

  1578         self._treeinmem = usetreemanifest

  1579         super(manifest, self).__init__(opener, dir=dir, dirlogcache=dirlogcache)