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To: gentoo-user@lists.gentoo.org
From:  Nikos Chantziaras <realnc@arcor.de>
Subject: [gentoo-user]  Re: Short cut for unmerging all packages that are not longer in the
 tree
Date:  Thu, 22 Oct 2009 17:05:37 +0300
Organization:  Lucas Barks
Message-ID: <hbpord$gut$1@ger.gmane.org>
References:  <tkrat.fe158f5b398a298c@igpm.rwth-aachen.de>
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On 10/22/2009 02:14 PM, Helmut Jarausch wrote:
> Hi,
>
> is there an easy way to unmerge all packages which are no longer in
> the current portage tree.
> (Those make problems on update world)
>
> Many thanks for a hint,
> Helmut.

Quick 'n dirty one-liner:

   for f in $(qlist -IC); do stat /usr/portage/"$f" > /dev/null; done

For packages not in the tree, you will get something like:

   stat: cannot stat `/usr/portage/x11-themes/foobar': No such file
   or directory

meaning that x11-themes/foobar is not in the tree.  Of course this 
doesn't check overlays.