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To: gentoo-dev@g.o
From: Zac Medico <zmedico@g.o>
Subject: Re: metadata/md5-cache
Date: Sat, 02 Jun 2012 23:41:54 -0700
On 06/02/2012 08:52 PM, James Cloos wrote:
>>>>>> "ZM" == Zac Medico <zmedico@g.o> writes:
> 
> Thanks for the quick reply and the reference to the bz.
> 
> ZM> We had a bug about that [1] when we first deployed md5-cache, but it's
> ZM> supposed to have been fixed.
> 
> It is not fixed.  The behavior has not changed in any way since md5-cache was added.

As I've noted on the bug, a simple mtime check on the cache entries
seems to indicate that it's working properly.

> ZM> [1] https://bugs.gentoo.org/show_bug.cgi?id=410505
> 
> I've added a please re-open note to that bug.
> 
> Thanks for working on it.

One way that we can reduce the amount of cache regeneration is to add
support for elibs:

  http://www.gentoo.org/proj/en/glep/glep-0033.htm

Since elibs aren't allowed to modify the ebuild metadata, the metadata
cache doesn't need to be regenerated when elibs are modified. For
example, if eutils was an elib, we would avoid a lot of cache
regeneration each time it was modified.
-- 
Thanks,
Zac


References:
metadata/md5-cache
-- James Cloos
Re: metadata/md5-cache
-- Zac Medico
Re: metadata/md5-cache
-- James Cloos
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Updated Jun 29, 2012

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