[PATCH 4 of 9] branchmap: read and write key part related to filtered revision

[Pierre-Yves David]

On 26 déc. 2012, at 22:09, Idan Kamara wrote:

> On Wed, Dec 26, 2012 at 10:33 PM, Pierre-Yves David <pierre-yves.david at ens-lyon.org> wrote:
> >
> > # HG changeset patch
> > # User Pierre-Yves David <pierre-yves.david at logilab.fr>
> > # Date 1356187406 -3600
> > # Node ID ed03a82360c2b90195a2d4dacca205e5a705a1f2
> > # Parent  4b098d0339f9e8b1805c4f6ef1d8bcf59f5a6349
> > branchmap: read and write key part related to filtered revision
> >
> > Now that we have a third part for the cache key we need to write and read
> > it on
> > disk. It is only written when there is filtered revision. This keep the
> > format
> > compatible with older version.
> 
> What will happen when an older client tries to use a newly
> written cache?

That does not happen.

older client only tries to read `.hg/cache/branchheads`. This file contains the branchmap cache without any filtering applied. Therefore nothing is filtered and only tipnode and tiprev is written to disk exactly as the older format.

Cache for filtered version has they own file that older version won't try to read.

-- 
Pierre-Yves David