266 

   266 

   267 class Index2Mixin(object):

   267 class Index2Mixin(object):

   268     index_format = revlog_constants.INDEX_ENTRY_V2

   268     index_format = revlog_constants.INDEX_ENTRY_V2

   269     null_item = (0, 0, 0, -1, -1, -1, -1, sha1nodeconstants.nullid, 0, 0)

   269     null_item = (0, 0, 0, -1, -1, -1, -1, sha1nodeconstants.nullid, 0, 0)

   270 

   270 

   272         """

   274         """

   273         Replace an existing index entry's sidedata offset and length with new

   275         Replace an existing index entry's sidedata offset and length with new

   274         ones.

   276         ones.

   275         This cannot be used outside of the context of sidedata rewriting,

   277         This cannot be used outside of the context of sidedata rewriting,

   276         inside the transaction that creates the revision `i`.

   278         inside the transaction that creates the revision `i`.

   281         sidedata_format = b">Qi"

   283         sidedata_format = b">Qi"

   282         packed_size = struct.calcsize(sidedata_format)

   284         packed_size = struct.calcsize(sidedata_format)

   283         if i >= self._lgt:

   285         if i >= self._lgt:

   284             packed = _pack(sidedata_format, sidedata_offset, sidedata_length)

   286             packed = _pack(sidedata_format, sidedata_offset, sidedata_length)

   285             old = self._extra[i - self._lgt]

   287             old = self._extra[i - self._lgt]

   287             self._extra[i - self._lgt] = new

   290             self._extra[i - self._lgt] = new

   288         else:

   291         else:

   289             msg = b"cannot rewrite entries outside of this transaction"

   292             msg = b"cannot rewrite entries outside of this transaction"

   290             raise KeyError(msg)

   293             raise KeyError(msg)

   291 

   294