Re: [gentoo-user] Re: Emerge question: What's with the @?

[Paul Hartman <paul.hartman+gentoo@gmail.com>]

On Tue, Jan 13, 2009 at 1:37 PM, Chris Lieb <chris.lieb@gmail.com> wrote:
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> Nick Cunningham wrote:
>>
>>
>> 2009/1/13 Chris Lieb <chris.lieb@gmail.com <mailto:chris.lieb@gmail.com>>
>>
>>     I've noticed lately on the ML that people have been talking about using
>>     package sets, such as @world and @installed.  I figured it was a part of
>>     portage 2.1.6* since using @world with 2.1.4* would result in an error
>>     message about an invalid package atom.  However, after upgrading to
>>     portage 2.1.6.4, I still get the same error when doing something like
>>     'emerge -up @world'.
>>
>>     What are these package sets?  What is the difference between 'emerge -up
>>     world' and 'emerge -up @world'?  Why don't these package sets ever work
>>     for me?
>>
>>     Thanks,
>>     Chris
>>
>>
>> A set is basically just group of packages, you can either define you own
>> using /etc/portage/ or using gentoo provided ones like @world and
>> @system (which will replace the current emerge system/world usage
>> eventually), aswell as useful sets such as @live-rebuild (any package
>> that uses a cvs/svn/git eclass, so basically any -9999 ebuild) and
>> @module-rebuild which is handy for rebuilding kernel modules. Also id
>> imagine meta-packages will eventually move over to sets as it makes
>> rebuilding everything or removing it much easier, currently theres only
>> kde4 that makes large usage of sets but id imagine once portage 2.20
>> goes stable we'l see great set adoption.
>> An easy way to see what sets are available is to use the emerge
>> --list-sets command.
>>
>> -Nick
>
> Thanks for the info.  The @module-rebuild should come in handy.  Any
> idea on when we'll see 2.2* hit stable?
>
> Thanks again,
> Chris

"When it's ready" I guess is the standard answer there. :) it's masked
in ~arch as well, but you can simply unmask it if you want to use it.
That's what I did. I have these sets available in my system currently:

    downgrade
    installed
    live-rebuild
    module-rebuild
    preserved-rebuild
    security
    system
    unavailable
    world

@live-rebuild is especially handy to rebuild live cvs/svn/etc ebuilds
(that -9999 stuff)

Paul