[gentoo-user] Short cut for unmerging all packages that ar..

On Thursday 22 October 2009 15:42:41 Johannes Kimmel wrote:
> 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.
>
> if packages are not in the portage tree, they should not be pulled in
> anymore. therefore "emerge --depclean" could help.

depclean only removes packages that it knows for a fact are no longer needed.
This means

- not in world
- not linked to by anything
- not depended on by anything

"not in the tree" is not part of that list. If you have a package in world
that is not in the tree anymore, depclean will leave it as is. It will remove
ancient mere deps that are somehow still lying around though

--
alan dot mckinnon at gmail dot com

On Thu, 22 Oct 2009 14:09:31 +0200, Alan McKinnon
<alan.mckinnon RemoveThis @gmail.com>
wrote:
> On Thursday 22 October 2009 15:42:41 Johannes Kimmel wrote:
>> 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.
>>
>> if packages are not in the portage tree, they should not be pulled in
>> anymore. therefore "emerge --depclean" could help.
>
> depclean only removes packages that it knows for a fact are no longer
> needed.
> This means
>
> - not in world
> - not linked to by anything
> - not depended on by anything
>
> "not in the tree" is not part of that list. If you have a package in
world
> that is not in the tree anymore, depclean will leave it as is. It will
> remove
> ancient mere deps that are somehow still lying around though

Yep, if the package is in world, delclean will not help.

You could always do it the bash way. I have no idea if there's any tool
out there that will make this easier, but it's simple enough to script it,
something like this should work:

qlist -I --nocolor | while read pkg; do
if [ ! -d "/var/portage/$pkg" ]; then
echo "$pkg is not in portage"
fi
done

This will not catch overlays, but it could be easily extended to do so,
it's just a generic (and untested) example. It should work I guess. It just
dumps the list of installed packages, then tries to find a dir with the
same name under your portage directory and if it doesn't exist then the
package name is printed.

--
Jesús Guerrero

On Thursday 22 October 2009 15:58:17 Jesús Guerrero wrote:
> > depclean only removes packages that it knows for a fact are no longer
> > needed.
> > This means
> >
> > - not in world
> > - not linked to by anything
> > - not depended on by anything
> >
> > "not in the tree" is not part of that list. If you have a package in
>
> world
>
> > that is not in the tree anymore, depclean will leave it as is. It will
> > remove
> > ancient mere deps that are somehow still lying around though
>
> Yep, if the package is in world, delclean will not help.
>
> You could always do it the bash way. I have no idea if there's any tool
> out there that will make this easier, but it's simple enough to script it,
> something like this should work:
>
> qlist -I --nocolor | while read pkg; do
> if [ ! -d "/var/portage/$pkg" ]; then
> echo "$pkg is not in portage"
> fi
> done
>
> This will not catch overlays, but it could be easily extended to do so,
> it's just a generic (and untested) example. It should work I guess. It just
> dumps the list of installed packages, then tries to find a dir with the
> same name under your portage directory and if it doesn't exist then the
> package name is printed.
>


The best place for this would be

equery orphan <params>

or similar. I'm sure the maintainer will gratefully accept patches

--
alan dot mckinnon at gmail dot com

Thanks to all of you for your help,
Helmut.

--
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany

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.