Re: [gentoo-portage-dev] custom profiles?

[Joakim Tjernlund <joakim.tjernlund@transmode.se>]

On Sat, 2015-03-14 at 10:58 -0700, Zac Medico wrote:
> On 03/14/2015 05:55 AM, Joakim Tjernlund wrote:
> > On Fri, 2015-03-13 at 10:51 -0700, Zac Medico wrote:
> > > On 03/13/2015 05:08 AM, Joakim Tjernlund wrote:
> > > > On Thu, 2015-03-12 at 17:51 -0700, Zac Medico wrote:
> > > > > On 03/12/2015 02:43 PM, Joakim Tjernlund wrote:
> > > > > > 
> > > > > > 
> > > > > > 
> > > > > > > 
> > > > > > > > Why is --dynamic-deps=y default? This feels like lying about your true deps, I am probably 
> > > > > > > > missing
> > > > > > > > something here, an example would be great:)  
> > > > > > > 
> > > > > > > It's a legacy behavior, since portage has always behaved this way, and ebuild developers have 
> > > > > > > relied 
> > > > > > > upon 
> > > > > > > it (resulting in broken dependency calculations without it).
> > > > > > 
> > > > > > Here is odd difference:
> > > > > > 
> > > > > > emerge --dynamic-deps=n changed-deps=y -a1 vanilla-sources
> > > > > > ...
> > > > > >    Nothing to merge
> > > > > > 
> > > > > 
> > > > > That's normal, because --changed-deps implies --selective (a number of options do this). If you add 
> > > > > --
> > > > > selective=n to the above command, you'll get the same result regardless of the --changed-deps 
> > > > > option.
> > > > 
> > > > I just did a sync and "emerge -aNDu --dynamic-deps=n --changed-deps=y --selective=n world" and
> > > > again portage wanted to rebuild > 150 pkgs.
> > > > --selective=n seems to be the culprit, should I expect this from --selective=n ?
> > > 
> > > Yes --selective=n is the opposite of --noreplace, so for the above command, it will rebuild everything 
> > > in 
> > > /var/lib/portage/world.
> > 
> > hmm, this kind of a bummer
> 
> I don't understand your motivation for using --selective=n with that command. Isn't the command useful 
> without it?

I have it my default emerge options 

> 
> > --dynamic-deps=n implies --changed-deps=y which implies --selective=n
> > and this makes the whole world to rebuild.
> 
> No, don't use --selective=n. I only mentioned it in order to explain the behavior that you observed.
> 
> > Using just --dynamic-deps=n was not really safe if I understood corretly?
> 
> It's safe, but you may need --changed-deps in order for your dependency calculations to work (depends on 
> how the dependencies of your installed packages have changed).

I am trying to find out what to put in emerge default options and this "may need"
does relay compute in terms of default options.
Does --dynamic-deps=n only work reliable with emerge -NDu world ?

 Jocke