Re: [gentoo-portage-dev] accessing portage updates through it's data structures

[Tom Hosiawa]

> > Anybody have any ideas how I can basically do 'emerge -puDNv' directly
> > from my superkaramba python program, and get the updates available
> > directly from the portage data structures?
>
> What is needed for -uDNv is mostly locked away in emerge, unfortunately.
> The following couple of lines should get you everything other than --newuse
> though. As you only seem to be interested in what packages are available
> for updating, the ordering shouldn't really matter.
>
>
> import portage
>
> pdb = portage.db["/"]["porttree"].dbapi
> vdb = portage.db["/"]["vartree"].dbapi
>
> installed_pkgs = dict([(key, vdb.match(key)) for key in vdb.cp_all()])
> latest_pkgs = dict([(key, portage.best(pdb.match(key))) for key in installed_pkgs])
> updatable_pkgs = [latest_pkgs[key] for key in latest_pkgs if latest_pkgs[key] not in installed_pkgs[key]]
> updatable_pkgs = [pkg for pkg in updatable_pkgs if pkg]
>
>
> That last line there is to kill off the None elements that end up in
> updatable_pkgs when there is a package installed that has no versions
> available in the rsync tree. Other than that, portage.catpkgsplit() will
> split a package identifier into [cat, pkg, ver, rev].

Thanks, I'll need more flexibility thoough. I'll just strip down
emerge for what I need and include it with my program.
--
Tom

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