Re: [gentoo-dev] [RFC] New GLEP: file installation masks

[Michał Górny]

On Fri, 20 May 2016 16:00:38 -0400
Ian Stakenvicius <axs@g.o> wrote:

> On 20/05/16 11:49 AM, Michał Górny wrote:
> > On Fri, 20 May 2016 11:40:39 -0400
> > Michael Orlitzky <mjo@g.o> wrote:
> >
> >> On 05/20/2016 11:34 AM, Daniel Campbell wrote:
> >>>
> >>> ...and the user has this in their install.mask file:
> >>>
> >>> [bash-completion]
> >>> path=/some/other/path
> >>> desc=some other description
> >>>
> >>
> >> I don't think that's allowed; the groups are specified by each
> >> repository's metadata/install-mask.conf, not by the users.
> >>
> >> Although, you can ask the same question about overlays that have
> >> group-name clashes. Is that an error, or would we use the one from the
> >> overlay?
> >
> > Oh, you are correct. Originally I planned to handle that, and I forgot
> > about it.
> >
> > Since there can be multiple paths, we have two options: either
> > override, or amend like systemd does with *.d files. I think the former
> > would be less surprising.
> >
> > Override is simple -- entry from next file overrides previous,
> > and discards all data.
> >
> > Amending is harder. Description from next file overrides former, but
> > paths are appended. But there is special 'path=' (empty) that discards
> > all previous values and starts over. I don't think that's really a good
> > idea for repos.
>
>
> I'd vote override, simply because it would match the same behaviour
> seen with eclasses and we could leverage the same 'masters =' in
> repos.conf to manage order when dealing with multiple repos.

I thought about this more and decided we can't accept collisions
at all, since INSTALL_MASK is defined globally and not per ebuild. We
don't want the same mask to mean different things in different
repositories after all, do we? ;-)

-- 
Best regards,
Michał Górny
<http://dev.gentoo.org/~mgorny/>