Re: [gentoo-soc] rfc: reducing the time of "Calculating dependencies" phase project.

["Александр Берсенев" <bay@hackerdom.ru>]

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The modification date of /usr/portage and overlays dir can be used as a
signal for emerge to drop some caches. In this case the drop cache command
could just do "touch <dir>", and utils, modifying tree(e.g. "ebuild
<ebuild> manifest") could do this operation as well.

Best,
Alexander Bersenev



2013/4/27 James Cloos <cloos@jhcloos.com>

> As someone whe often does edit ebuilds in overlays (very occasionally in
> /usr/portage, too), having to run something to update the cache for said
> overlay is OK.
>
> But it *must* update just the cli-specified overlay(s), w/o having to go
> through and update everything every time it is run.
>
> For comparison, my primary workstation, with several overlays, takes
> several minutes to do a dep.  Even with a hot cache.  Improving that to
> something reasonable is the single most important change portage can get.
>
> Also, if /var/db/pkg is to be cached, the existing /var/db/pkg layout
> should remain as a backup, so that the cache of what is installed can
> be restored easily should it ever get corrupted.  Portage can update
> that cache after updating the /var/db/pkg/ tree.
>
> -JimC
> --
> James Cloos <cloos@jhcloos.com>         OpenPGP: 1024D/ED7DAEA6
>
>

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