view mercurial/cext/__init__.py @ 43529:bf176127033a

revlog: access the nodemap through the index

The `revlog.rev` method now access the nodemap through `self.index.nodemap`,
instead of using the `_nodecache` attribute that we are trying to remove.

This work is part of a refactoring to unify the revlog index and the nodemap.
This unification prepare the use of a persistent nodemap.

Differential Revision: https://phab.mercurial-scm.org/D7317