autodepclean script (was "how to remove HAL")
 

On Tue, Aug 17, 2010 at 09:49:22PM +0200, Enrico Weigelt wrote

> I've just experimented a bit with that and it turned out that
> --depclean doesn't clean up the buildtime-only deps. But if I
> remove one of them (eg. cabextract), they don't get pulled in again
> (that's indicating the depending ebuilds are written properly).

This reminds me of a script I've been working on to remove unnecessary
cruft. Everything that follows is run as root, because it runs
"emerge". The attached script "autodepclean" parses the output from
"emerge --pretend --depclean" and generates a script "cleanscript" that
you can run to clean up your system. This should handle your situation,
but it's also a general solution to the entire class of problems of
cleaning up when you remove all programs or USE flags that pull in a
lib. It is not restricted to just HAL

Warning, this script is beta. Use with care. It will remove
gentoo-sources versions higher than your current kernel. This is
technically correct for removing unused ebuilds. But it may not be what
you want.

--
Walter Dnes <waltdnes@waltdnes.org>
#!/bin/bash
# autodepclean script v 0.01 released under GPL v3 by Walter Dnes 2010/08/18
# Generates a file "cleanscript" to remove unused ebuilds, including
# buildtime-only dependancies.
#
# Warning; this script is still beta. I recommend that you check the output
# in cleanscript before running it. It is agressive about removing unused
# gentoo-sources versions. This includes those that are higher than your
# current kernel. This is technically correct for removing unused ebuilds,
# but it may not be what you want.
#
echo "#!/bin/bash" > cleanscript
echo "#" > cleanscript.000
emerge --pretend --depclean |
grep -A1 "^ .*/" |
grep -v "^ *" |
grep -v "^--" |
sed ":/: {
N
s:
::
s/ selected: /-/
s/^ /emerge --depclean =/
}" >> cleanscript.000
while read
do
echo "${REPLY}" >> cleanscript
if [ "${REPLY:0:6}" == "emerge" ]; then
echo "revdep-rebuild" >> cleanscript
fi
done < cleanscript.000
chmod 744 cleanscript

autodepclean script (was "how to remove HAL")
 

On Thursday 19 August 2010, Walter Dnes wrote:
> On Tue, Aug 17, 2010 at 09:49:22PM +0200, Enrico Weigelt wrote
>
> > I've just experimented a bit with that and it turned out that
> > --depclean doesn't clean up the buildtime-only deps. But if I
> > remove one of them (eg. cabextract), they don't get pulled in again
> > (that's indicating the depending ebuilds are written properly).
>
> This reminds me of a script I've been working on to remove
> unnecessary cruft. Everything that follows is run as root, because
> it runs "emerge". The attached script "autodepclean" parses the
> output from "emerge --pretend --depclean" and generates a script
> "cleanscript" that you can run to clean up your system. This should
> handle your situation, but it's also a general solution to the
> entire class of problems of cleaning up when you remove all programs
> or USE flags that pull in a lib. It is not restricted to just HAL
>
> Warning, this script is beta. Use with care. It will remove
> gentoo-sources versions higher than your current kernel. This is
> technically correct for removing unused ebuilds. But it may not be
> what you want.

I'm unclear about the aim of your script, what does different from
"emerge -a --depclean" followed by "revdep-rebuild -- -a"?

Ciao
Francesco
--
Linux Version 2.6.35-gentoo-r1, Compiled #1 SMP PREEMPT Wed Aug 11
07:11:30 CEST 2010
Two 1GHz AMD Athlon 64 Processors, 4GB RAM, 4021.84 Bogomips Total
aemaeth

autodepclean script (was "how to remove HAL")
 

On Sat, Aug 21, 2010 at 12:07:40PM +0200, Francesco Talamona wrote

> I'm unclear about the aim of your script, what does different from
> "emerge -a --depclean" followed by "revdep-rebuild -- -a"?

The autodepclean script automatically generates a list of of target
ebuuilds to clean out (i.e. "cleanscript"). This gives you the
opportunity to review it and delete items from the list before going
ahead. Does "emerge -a --depclean" allow you to skip individual items?

--
Walter Dnes <waltdnes@waltdnes.org>

autodepclean script (was "how to remove HAL")
 

On Sunday 22 August 2010, Walter Dnes wrote:
> On Sat, Aug 21, 2010 at 12:07:40PM +0200, Francesco Talamona wrote
>
> > I'm unclear about the aim of your script, what does different from
> > "emerge -a --depclean" followed by "revdep-rebuild -- -a"?
>
> The autodepclean script automatically generates a list of of target
> ebuuilds to clean out (i.e. "cleanscript"). This gives you the
> opportunity to review it and delete items from the list before going
> ahead. Does "emerge -a --depclean" allow you to skip individual
> items?

Ah ok, now i see the point. Usually I prefer to stop depclean (answering
no) and specify the exceptions with emerge --noreplace.

This is because the exclusion of some packages from depclean can affect
the following result of it.

If you install a package having many dependencies, with emerge --oneshot
and then run emerge --depclean you'll see that is easier to run two
times depclean than edit the generated list :)

Cheers
Francesco
--
Linux Version 2.6.35-gentoo-r1, Compiled #1 SMP PREEMPT Wed Aug 11
07:11:30 CEST 2010
Two 2.9GHz AMD Athlon 64 Processors, 4GB RAM, 11657 Bogomips Total
aemaeth