Why do shared repos have independent branch caches?

[Gregory Szorc]

There are known issues like this with the branch and tags caches. It is impacting Mozilla as well.

I plan to talk to people about this at the sprint next weekend.

> On Aug 22, 2014, at 7:10, "Michael O'Connor" <moconnor at janestreet.com> wrote:
> 
> Does anyone know why repos produced with 'hg share' have branch caches that are independent of the source repo?
> 
> I'm in a situation where rebuilding the caches takes significant time, and the work is being duplicated across shared repos but I'm not sure why.
> 
> More concretely, in branchmap.py, why not have the _filename function check if the repo has a sharedpath, and, if so, return the cache inside the repo pointed to by sharedpath?
> 
> Thanks!
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