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libertytrek
Apprentice
Joined: 18 Jul 2007
Posts: 258
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 Posted: Mon Mar 02, 2015 1:07 pm Post subject: Question about cleaning up world file |
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Hi all,
Googling on a minor issue with perl-cleaner after the 5.20 upgrade, I ran across a post from the gentoo user mail list from Mick that said:
"you shouldn't really have any libs in your world file. Any required
would be pulled in as dependencies."
Is this in fact true?
I checked mine, and found:
# grep -i libs /var/lib/portage/world
app-emulation/emul-linux-x86-baselibs
dev-libs/apr
dev-libs/apr-util
dev-libs/boost
dev-libs/elfutils
dev-libs/glib
dev-libs/gmp
dev-libs/libaio
dev-libs/libdnet
dev-libs/libevent
dev-libs/libffi
dev-libs/libgcrypt
dev-libs/libgpg-error
dev-libs/libksba
dev-libs/libpcre
dev-libs/libyaml
dev-libs/oniguruma
dev-libs/openssl
media-libs/libjpeg-turbo
media-libs/libpng
net-libs/libtirpc
net-libs/serf
sys-libs/cracklib
sys-libs/glibc
sys-libs/libcap
sys-libs/timezone-data
So, should I delete all of these? Even glib and glibc?
Also - is there a definitive guide (preferably for non programmer types) on just how to properly clean the world file?
Thanks. |
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charles17
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Joined: 02 Mar 2008
Posts: 3664
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| Posted: Mon Mar 02, 2015 1:52 pm Post subject: |
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Just deselect them. | Quote: | | # emerge --deselect=y <package> |
And check | Quote: | | $ for i in $(cat /var/lib/portage/world); do equery d $i; done |
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gerard27
Advocate
Joined: 04 Jan 2004
Posts: 2377
Location: Netherlands
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| Posted: Mon Mar 02, 2015 2:03 pm Post subject: |
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libertytrek,
Deselect might damage your system.
Run
Gerard.
_________________
To install Gentoo I use sysrescuecd.Based on Gentoo,has firefox to browse Gentoo docs and mc to browse (and edit) files.
The same disk can be used for 32 and 64 bit installs.
You can follow the Handbook verbatim.
http://www.sysresccd.org/Download |
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libertytrek
Apprentice
Joined: 18 Jul 2007
Posts: 258
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| Posted: Mon Mar 02, 2015 2:20 pm Post subject: |
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Ran that, but:
# emaint -p world
Emaint: check world 100% [============================================>]
That was the only output... |
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lexflex
Guru
Joined: 05 Mar 2006
Posts: 363
Location: the Netherlands
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| Posted: Mon Mar 02, 2015 2:24 pm Post subject: Re: Question about cleaning up world file |
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Hi,
| libertytrek wrote: | Hi all,
"you shouldn't really have any libs in your world file. Any required would be pulled in as dependencies."
Is this in fact true?
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The world file only should contain the files you explicitly installed. It does not need to contain the dependencies since they are -indeed- pulled in during emerge (and cleaned if the dependency is no longer needed, for example when useflags are changed). However: In some ( rare) cases you might need a library for some (experimental) program for which no ebuild is available. In that case you can explicitly install that library, and it is added to the world file.
My guess would be those entries you see are added because of 'reinstalls' of packages later on, without using '--oneshot' ( oneshot just (re)emerges a package without adding it to the world file).
| Quote: | Also - is there a definitive guide (preferably for non programmer types) on just how to properly clean the world file?
Thanks. |
I dont know, but basically, for each file you need to decide if you would have installed it explicitly, or that it would have been pulled in automatically.
As suggested, you can use 'equery depends' to see what packages depend on a given package. If so, it would have been pulled in automatically.
For example: libgpg-error is not in my world file, and 'equery depends libgpg-error' shows it depends on app-crypt/gnupg.
Alex. |
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libertytrek
Apprentice
Joined: 18 Jul 2007
Posts: 258
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| Posted: Mon Mar 02, 2015 2:33 pm Post subject: |
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Thanls textflex...
So, what would be the worst case scenario if I deleted one that I had installed but forgotten about and still needed? |
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lexflex
Guru
Joined: 05 Mar 2006
Posts: 363
Location: the Netherlands
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| Posted: Mon Mar 02, 2015 2:38 pm Post subject: |
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| libertytrek wrote: | | So, what would be the worst case scenario if I deleted one that I had installed but forgotten about and still needed? |
Well, there might be dependencies on that packages that would get removed if you emerge clean your system.
I guess you would need to re-emerge the files if needed.
Best is to always double-check, for example using emerge update pretend, to see if other packages get removed.
Also , do not 'unmerge' packages: You want to keep them on your system , but only remove them from your worldfile....
Before starting to remove packages from the worldfile (using emerge) you best make a copy of your worldfile (cp /var/lib/portage/world to world_bu_date or something) , so you can easily look up the files that where there before you started cleaning... |
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lexflex
Guru
Joined: 05 Mar 2006
Posts: 363
Location: the Netherlands
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libertytrek
Apprentice
Joined: 18 Jul 2007
Posts: 258
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| Posted: Mon Mar 02, 2015 3:17 pm Post subject: |
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| Nice, thanks again! |
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Irre
Guru
Joined: 09 Nov 2013
Posts: 434
Location: Stockholm
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| Posted: Mon Mar 02, 2015 7:47 pm Post subject: |
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We discussed this some days ago. This script removes not needed entries in the world-file: | Code: | for i in `cat /var/lib/portage/world`
do
if emerge -p --depclean $i |
grep "These are the packages that would be unmerged:">/dev/null
then echo $i >>/var/lib/portage/world-new
else echo "removing:" $i
fi
done
mv /var/lib/portage/world /var/lib/portage/world-previous
mv /var/lib/portage/world-new /var/lib/portage/world
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charles17
Advocate
Joined: 02 Mar 2008
Posts: 3664
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| Posted: Tue Mar 03, 2015 12:34 pm Post subject: |
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| gerard82 wrote: | | Deselect might damage your system. |
Could you please drop some words on how/why deselecting packages could damage a system? |
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steveL
Watchman
Joined: 13 Sep 2006
Posts: 5153
Location: The Peanut Gallery
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| Posted: Tue Mar 03, 2015 3:01 pm Post subject: |
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I find this easiest:
| Code: | cp -p /var/lib/portage/world /root/world.bak
nano /var/lib/portage/world |
because ctrl-K to delete entries is so quick. :) |
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