Re: [gentoo-portage-dev] repos.conf location w.r.t PORTAGE_CONFIGROOT

[Joakim Tjernlund]

On Wed, 2015-05-06 at 14:36 -0700, Zac Medico wrote:
> On 05/06/15 14:30, Joakim Tjernlund wrote:
> > On Wed, 2015-05-06 at 13:30 -0700, Zac Medico wrote:
> > > On 05/06/15 13:22, Joakim Tjernlund wrote:
> > > > On Wed, 2015-05-06 at 12:54 -0700, Zac Medico wrote:
> > > > > On 05/06/15 12:41, Joakim Tjernlund wrote:
> > > > > > On Wed, 2015-05-06 at 19:13 +0000, Joakim Tjernlund wrote:
> > > > > > > On Wed, 2015-05-06 at 11:37 -0700, Zac Medico wrote:
> > > > > > > > On 05/06/15 09:54, Joakim Tjernlund wrote:
> > > > > > > > > I am trying to rebuild an old cross sysroot and I got problems.
> > > > > > > > > I cannot make emerge to select my old ebuilds in an overlay over those
> > > > > > > > > in /usr/portage.
> > > > > > > > >
> > > > > > > > > What new is since last time I did this is /etc/portage/repos.conf/
> > > > > > > > > I suspect emerge always reads /etc/portage/repos.conf/ no matter
> > > > > > > > > what I set PORTAGE_CONFIGROOT / ROOT to ?
> > > > > > > > >
> > > > > > > > >  Jocke
> > > > > > > > >
> > > > > > > >
> > > > > > > > It instantiates 2 config instances, one using /etc/portage/repos.conf
> > > > > > > > (for build time DEPEND) and another one using
> > > > > > > > $PORTAGE_CONFIGROOT/etc/portage/repos.conf (for run time {P,R}DEPEND).
> > > > > > > > You can see that it's joined with PORTAGE_CONFIGROOT in the
> > > > > > > > load_repository_config function:
> > > > > > > >
> > > > > > > > https://gitweb.gentoo.org/proj/portage.git/tree/pym/portage/repository/config.py?id=0f191113cc
> > > > > > > > cd04
> > > > > > > > 9e11
> > > > > > > > fdbe
> > > > > > > > 73
> > > > > > > > 493eb1efbf4bf89e#n971
> > > > > > >
> > > > > > > I see, doesn't this prevent exactly what I want to do?
> > > > > > >
> > > > > > > I can't see why this should be needed, it only creates a mess, another example:
> > > > > > > I tried to specify exact version of my old binutils and while that worked, portage wanted
> > > > > > > to pull in a newer binutils-config from the hosts master gentoo repo and
> > > > > > > thus the build failed.
> > > > > > >
> > > > > > > If a someone really wants this behaviour, he can just add the hosts master repo
> > > > > > > in his PORTAGE_CONFIGROOT IMHO
> > > > > > >
> > > > >
> > > > > Maybe emerge --root-deps=rdeps is what you are looking for. This will
> > > > > cause it to ignore DEPEND.
> > > >
> > > > That is not the same is it? if I "emerge ncurses" it will build ncurses but still
> > > > take the ebuild from the hosts master since it is newer version.
> > > >
> > > > I realize now that I can change what repos are searched by using
> > > > PORTAGE_REPOSITORIES=/my/own/repos.conf/
> > > > but I still find the default behaviour very confusing and I don't see that it is useful.
> > >
> > > The idea is that you have separate repositories configured for each
> > > ROOT. If it's satisfying a build-time DEPEND that will be installed into
> > > ROOT=/, then it's supposed to use the repositories configured for ROOT=/.
> >
> > I see, but in my case I only install into my sysroot so I don't want this behaviour.
>
> So, why don't you use the --root-deps option?

Just did(and --root-deps=rdeps too) and it didn't work, still wants to use
my newer hosts pkgs. :(

>
> > Can you not add a test for CHOST/CBULID/CTARGET (never remeber which is which) so portage
> > only adds the hosts repo if they are the same?
> > Basically only add the master repo if not cross-building?
>
> It would have to be tied to an option like --root-deps. I still suspect
> that --root-deps is what you really want.

No, I really think that portage is over doing things here.
Anyone that is using ROOT and PORTAGE_CONFIGROOT only needs the main repo iff
DEPEND pkgs are installed into /. When cross building you don't what DEPEND installed
into / or having the cross build use any DEPENDS which already are installed in /
In the cross case portage should only use what PORTAGE_CONFIGROOT points to. If the
cross builder wants to use /usr/portage he just adds this to the PORTAGE_CONFIGROOT's repos.conf

 Jocke