view .arcconfig @ 39244:73cf21b2e8a6

manifest: add getstorage() to manifestlog and use it globally

It is a common pattern to obtain a directory manifest storage instance
(a manifestrevlog) by going through manifestlog._revlog.dirlog().

Why access to storage and caching of other manifests is done through
manifestrevlog instead of manifestlog, I don't know.

This commit establishes a getstorage(tree) API on manifestlog and
imanifestlog that provides a public API for accessing manifest storage.

All consumers previously using private attributes have been updated
to use this new method.

.. api:: manifestlog now has a getstorage(tree) method

   It should be used for obtaining an object representing the
   manifest's storage implementation. Accessing
   manifestlog._revlog should be avoided.

Differential Revision: https://phab.mercurial-scm.org/D4277

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