Re: [gentoo-user] preserved-rebuild will not run at all

Mark Knecht <markknecht@×××××.com> wrote:

> On Sun, Dec 12, 2010 at 1:41 PM, Alan McKinnon <alan.mckinnon@×××××.com> wrote:
> > Apparently, though unproven, at 23:10 on Sunday 12 December 2010,
> > covici@××××××××××.com did opine thusly:
> >
> >> Alan McKinnon <alan.mckinnon@×××××.com> wrote:
> >> > Apparently, though unproven, at 22:35 on Sunday 12 December 2010,
> >> >
> >> > covici@××××××××××.com did opine thusly:
> >> > > Mark Knecht <markknecht@×××××.com> wrote:
> >> > > > On Sun, Dec 12, 2010 at 10:48 AM,  <covici@××××××××××.com> wrote:
> >> > > > > I have a fair number of preserved-libs, but it will not run at all
> >> > > > > and gives the rather strange message:
> >> > > > > Calculating dependencies... done!
> >> > > > >
> >> > > > > emerge: there are no ebuilds to satisfy "dev-tex/mplib:0".
> >> > > > > (dependency required by "@preserved-rebuild")
> >> > > > >
> >> > > > > Now I have no such package and an eix seems to indicate that there
> >> > > > > is no such, so how do I get this rebuild going again?
> >> > > > >
> >> > > > > Thanks in advance for all your help.
> >> > > > >
> >> > > > > --
> >> > > > > Your life is like a penny.  You're going to lose it.  The question
> >> > > > > is: How do
> >> > > > > you spend it?
> >> > > > >
> >> > > > >         John Covici
> >> > > > >         covici@××××××××××.com
> >> > > >
> >> > > > Probably searching for packages that depend on mplib, (equery) then
> >> > > > emerge -C them (it's what I'd probably do - depends...) then
> >> > > > re-emerge them if you still use them? Note that I'd go back to
> >> > > > finding what members of the world file need all this stuff and
> >> > > > emerge that with -DuN, maybe even doing a -depclean after the emerge
> >> > > > -C. It's all a guess though.
> >> > > >
> >> > > > Seems like this sort of thing happens when a package gets dumped in
> >> > > > an upgrade but somehow the ebuilds or package manager don't get
> >> > > > updated or just don't work perfectly.
> >> > > >
> >> > > > Again, all a guess but I can usually figure it out looking at equery
> >> > > > output, etc.
> >> > >
> >> > > Well, there was a package, but no ebuild, so I deleted the package and
> >> > > its going, but someone broke something.  I wish you could not delete an
> >> > > ebuild if you have the package, or it would put it somewhere to prevent
> >> > > this kind of thing.
> >> >
> >> > That will make portage store gigantic numbers of old and since upgraded
> >> > versions just in case maybe you might need it perhaps. Sounds like a lot
> >> > of pain for no gain. Sounds like exactly the kind of thing any decent
> >> > dev will reject.
> >> >
> >> > Besides, you can always get the old ebuild back from the Attic, or you
> >> > could copy it somewhere safe from /var/db/pkg/ before you delete it.
> >> >
> >> > Mark has the correct solution. mplib is not needed and was deleted.
> >> > However, it's in preserved-rebuild as being used by something. In all
> >> > likelyhood that something uses mplib purely optionally and you should
> >> > just rebuild that something. You provided no output so no-one here knows
> >> > how to fix your problem.
> >>
> >> There was no output, but what I sent and the only thing depended on
> >> mplib was the package with no ebuild, so I guess its fixed.  But
> >> something seems wrong here that you should have a package and the ebuild
> >> would go away like that.  I am not sure of the best solution.
> >
> > But you *don't* have the package, or it didn't uninstall cleanly. It's not in
> > the tree, it's not in eix, so it no longer exists. There would have been at
> > least 30 days notice in $PORTDIR/profiles/package.mask that it was going away,
> > and emerge gives output that there is a package present without an ebuild.
> >
> > Or maybe you deleted the ebuild yourself out of a local overlay.
> >
> > There's lots of ways this can happen. preserved-rebuild tracks that some part
> > of mplib is bieng used somehow, and it told you. Now you as the human being
> > get to decide how to proceed because the software cannot decide for you.
> >
> > The software is working as designed. What else did you expect it to do?
> >
> > One thing that is NOT a solution is to not delete the ebuild. That results in
> > your tree being out of sync with upstream. That is not allowed.
>
> covici,
> It strikes me that maybe I wasn't totally clear about this sort of fix. My bad.
>
> I _think_ that if you had a totally up to date system and a recent set
> of ebuilds on the system then likely none of them would depend on
> mplib. (Assuming it's been dropped for some reason.)
>
> The issue you need to sort of get your head around is that you are
> searching from some _older_, currently installed package that depends
> on this dropped library. Once you know the name of that package, if
> you emerge -C it then the system no longer requires it and complaints
> should go away. Assuming they do then I would likely do an emerge -p
> --depclean, which gets the system clean without the program you want,
> then I would emerge the newest version of that program which doesn't
> require mplib.
>
> Again, it's sort of an Easter Egg Hunt getting to all the older
> programs that required the library that's been removed. There may be
> more than one program that used it.
>
> One other possibility, I think, is that everything is OK with your
> programs but some mplib executable (possibly a *.so file or something)
> was left laying around and now revdep-rebuild is complaining that it
> cannot fix it. That one is relatively easy as you can search, using
> equery, for the package that provided it and if it's not on the system
> then just delete the *.so that it's complaining about.
>
> Whatever, do make sure that you double check the system with
> revdep-rebuild and emerge -pvDuN @world at the end to make sure your
> clean.
>
> Hope that helps,

I think I wound up doing what you said -- there was only one package and
that had no ebuild, but portage managed to unmerge it anyway and I did a
full update after that, so all should be working now.

Thanks.

-- 
Your life is like a penny.  You're going to lose it.  The question is:
How do
you spend it?

         John Covici
         covici@××××××××××.com