Re: [gentoo-dev] Re: [PATCH 3/5] xdg.eclass: move deps to RDEPEND

[Mike Gilbert]

On Mon, Oct 1, 2018 at 9:17 AM James Le Cuirot <chewi@g.o> wrote:
>
> On Mon, 1 Oct 2018 09:00:38 -0400
> Mike Gilbert <floppym@g.o> wrote:
>
> > > The reason why it is in DEPEND though is that none of these tools
> > > are required at runtime. They are needed at postinst and postrm
> > > stages which afaik makes them DEPEND on EAPI previous to EAPI 7 and
> > > BDEPEND in EAPI 7 if I'm not mistaken.
> >
> > This is incorrect; programs executed in pkg_postinst/pkg_postrm should
> > be present in RDEPEND. Consider a binpkg installation, which would
> > ignore DEPEND, but would still execute pkg_postinst.
> >
> > Another option: since xdg-utils.eclass functions will politely skip
> > the updates if the tools are missing, we could just drop the
> > dependency from xdg.eclass entirely and wait for the tools to get
> > installed through some indirect means.
>
> Unfortunately there is no correct answer here as we didn't consider
> this scenario when planning EAPI 7. We should have looked at Exherbo,
> which does make this important distinction. There is a bug report open.
>
> https://bugs.gentoo.org/660306
>
> What I will say is that we should not attempt to executing anything
> from within ROOT or SYSROOT unless it known to be interpreted
> (e.g. a shell script) and there is no feasible alternative. I add that
> exclusion clause because I have been forced to do this with
> python-config.

That's a good point; both update-desktop-database and
update-mime-database are compiled binaries, and should probably be
executed from BROOT (/) instead. I'll revise my patchset.