Re: [gentoo-portage-dev] prefix portage chaining

[Markus Duft]

On Thu, 2009-03-26 at 10:08 -0700, Ned Ludd wrote:
> On Thu, 2009-03-26 at 08:26 +0100, Markus Duft wrote:
> > On Wed, 2009-03-25 at 11:44 -0700, Ned Ludd wrote:
> > [snip]
> > >
> > >
> > > While much of what you are talking about here mainly applies to prefix,
> > > it looks to me from glancing over the code that you might of solved a
> > > long standing problem in the embedded world with cross compiling via
> > > portage. 222895  If that is the case, then I owe you a beer. one about
> > > the size of a keg.
> > >
> >
> > lol, thx for the beer ;)
> >
> > hmm... looking over that patch again, the only EPREFIX dependent thing
> > is, that i'm removing EPREFIX from the vartree class again :) so this
> > should pretty much plain apply to main too, and simply work. you may
> > want to rename READONLY_EPREFIX to READONLY_ROOT, but thats it :)
> >
> > the other stuff besides portage modification (baselayout patchery, etc.
> > is prefix specific again, so all you'd need is the portage changes.
> >
> > if you will try it, please let me know if it worked :) with the attached
> > patch "sed -i -e 's,READONLY_EPREFIX,READONLY_ROOT,g'", and applying to
> > an installed /usr/lib/portage should enable you to do it.
> > (backup /usr/lib/portage - i trust my work, but... we never know for
> > sure :))
> >
> > then add to make.conf: READONLY_ROOT=/my/other/root:DEPEND
> >
> > i hope this is what you where looking for...! and i hope it doesn't
> > somehow clash with the existing cross compile logic in portage regarding
> > where to merge to...
> >
> > Cheers, Markus
>
>
> patch failed a few hunks for me on ~arch vanilla-portage. I did point
> out the patch to one of the gentoo embedded/openmoko guys. Think they
> will be the most eager to test this.
>
> In our case if the code did work out whatever you call READONLY_ROOT we
> would probably need to expand to allow for more that one ROOT if it has
> to be defined in the parent /etc/make.conf

not the parent one, but the "childs" one. so you'd say
READONLY_ROOT="/:DEPEND" in your $ROOT. so when merging to $ROOT, '/'
will be searched for DEPENDs.

er... you can remove all hunks for vartree.py and remove the argument
"kill_eprefix" from all calls to vartree (should be one only i guess).
sorry - forgot about that.

Cheers, Markus

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