[gentoo-user] Remove redundant entries in "world" - howto

[gentoo-user] Remove redundant entries in "world" - howto

[Helmut Jarausch]

Hi,

does anybody know about an easy method to remove all entries from
/var/lib/portage/world
which would have been pulled in anyway
even if they were not contained in world.

My current attempt would be to write a script
which executes emerge -vpc on each entry in world.
If it wouldn't be removed it's obsolete in world.

Unfortunately this has to be done in several rounds.

Many thanks for a hint,
Helmut.

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Matthew Summers]

On Wed, Dec 8, 2010 at 5:23 AM, Helmut Jarausch
<jarausch@igpm.rwth-aachen.de> wrote:
> Hi,
>
> does anybody know about an easy method to remove all entries from
> /var/lib/portage/world
> which would have been pulled in anyway
> even if they were not contained in world.
>
> My current attempt would be to write a script
> which executes emerge -vpc on each entry in world.
> If it wouldn't be removed it's obsolete in world.
>
> Unfortunately this has to be done in several rounds.
>
> Many thanks for a hint,
> Helmut.
>
>

You may find that using 'emerge --deselect some-package' to be what
you need. It removeds the file from your world file, but does not
unmerge the package. That command switch is the functional opposite of
--noreplace.

I think you will find a wealth of information in the manpage for
emerge. Happy reading!

-- 
Matthew W. Summers

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Helmut Jarausch]

On 12/08/10 14:40:56, Matthew Summers wrote:
> On Wed, Dec 8, 2010 at 5:23 AM, Helmut Jarausch
> <jarausch@igpm.rwth-aachen.de> wrote:
> > Hi,
> >
> > does anybody know about an easy method to remove all entries from
> > /var/lib/portage/world
> > which would have been pulled in anyway
> > even if they were not contained in world.
> >
> > My current attempt would be to write a script
> > which executes emerge -vpc on each entry in world.
> > If it wouldn't be removed it's obsolete in world.
> >
> > Unfortunately this has to be done in several rounds.
> >
> > Many thanks for a hint,
> > Helmut.
> >
> >
> 
> You may find that using 'emerge --deselect some-package' to be what
> you need. It removeds the file from your world file, but does not
> unmerge the package. That command switch is the functional opposite 
> of
> --noreplace.
> 
> I think you will find a wealth of information in the manpage for
> emerge. Happy reading!

Sorry, but I still don't see it.
The main question is which packages might be removed
from 'world'?

Helmut.

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Alan McKinnon]

Apparently, though unproven, at 17:22 on Wednesday 08 December 2010, Helmut 
Jarausch did opine thusly:

> On 12/08/10 14:40:56, Matthew Summers wrote:
> > On Wed, Dec 8, 2010 at 5:23 AM, Helmut Jarausch
> > 
> > <jarausch@igpm.rwth-aachen.de> wrote:
> > > Hi,
> > > 
> > > does anybody know about an easy method to remove all entries from
> > > /var/lib/portage/world
> > > which would have been pulled in anyway
> > > even if they were not contained in world.
> > > 
> > > My current attempt would be to write a script
> > > which executes emerge -vpc on each entry in world.
> > > If it wouldn't be removed it's obsolete in world.
> > > 
> > > Unfortunately this has to be done in several rounds.
> > > 
> > > Many thanks for a hint,
> > > Helmut.
> > 
> > You may find that using 'emerge --deselect some-package' to be what
> > you need. It removeds the file from your world file, but does not
> > unmerge the package. That command switch is the functional opposite
> > of
> > --noreplace.
> > 
> > I think you will find a wealth of information in the manpage for
> > emerge. Happy reading!
> 
> Sorry, but I still don't see it.
> The main question is which packages might be removed
> from 'world'?


Your tools for this are two eyeballs and a brain. World gets bloated when 
users emerge libs and apps blindly that are covered by other packages and -
meta ebuilds (avoid this with emerge -1)

Edit the world file and remove everything you think might not be needed. Leave 
only apps you know for sure you need and want. Then run "emerge -p --depclean" 
which may or may not want to remove stuff. Inspect the list and add important 
stuff back into world with "emerge -n". Repeat until --depclean returns null 
output.

eix-test-obsolete also gives useful clues about redundant world entries, but 
not in a clearly laid out section like you are after. I know of no app that 
does that.


-- 
alan dot mckinnon at gmail dot com

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Neil Bothwick]

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On Wed, 08 Dec 2010 16:22:13 +0100, Helmut Jarausch wrote:

> Sorry, but I still don't see it.
> The main question is which packages might be removed
> from 'world'?

If you don't use it directly, it should probably be removed - so lib* for
a start. Then run emerge --depclean -p and see what would be uninstalled.


-- 
Neil Bothwick

I have a mind like a steel...uh...thingamajig...

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Re: [gentoo-user] Remove redundant entries in "world" - howto

[Mark Knecht]

On Wed, Dec 8, 2010 at 3:23 AM, Helmut Jarausch
<jarausch@igpm.rwth-aachen.de> wrote:
> Hi,
>
> does anybody know about an easy method to remove all entries from
> /var/lib/portage/world
> which would have been pulled in anyway
> even if they were not contained in world.
>
> My current attempt would be to write a script
> which executes emerge -vpc on each entry in world.
> If it wouldn't be removed it's obsolete in world.
>
> Unfortunately this has to be done in several rounds.
>
> Many thanks for a hint,
> Helmut.
>
>

In my experience the world file isn't huge - 50-100 lines - but only
if it contains the things that really need to be there. I've simply
commented out specific entries and run emerge -pvDuN @world to
determine if the entry wasn't necessary, and if it wasn't then removed
it. When I've boiled it down to things that need to be there (I.e. - I
can still run emerge -pvDuN @world and there would be no changes) then
I run emerge - p --depclean to look at what can be removed, make sure
it's OK, and then run depclean for real.

Hope this helps,
Mark

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Albert Hopkins]

On Wed, 2010-12-08 at 07:57 -0800, Mark Knecht wrote:
> On Wed, Dec 8, 2010 at 3:23 AM, Helmut Jarausch
> <jarausch@igpm.rwth-aachen.de> wrote:
> > Hi,
> >
> > does anybody know about an easy method to remove all entries from
> > /var/lib/portage/world
> > which would have been pulled in anyway
> > even if they were not contained in world.
> >
> > My current attempt would be to write a script
> > which executes emerge -vpc on each entry in world.
> > If it wouldn't be removed it's obsolete in world.
> >
> > Unfortunately this has to be done in several rounds.
> >
> > Many thanks for a hint,
> > Helmut.
> >
> >
> 
> In my experience the world file isn't huge - 50-100 lines - but only
> if it contains the things that really need to be there. I've simply
> commented out specific entries and run emerge -pvDuN @world to
> determine if the entry wasn't necessary, and if it wasn't then removed
> it. When I've boiled it down to things that need to be there (I.e. - I
> can still run emerge -pvDuN @world and there would be no changes) then
> I run emerge - p --depclean to look at what can be removed, make sure
> it's OK, and then run depclean for real.

I have a script I used to locate "redudancies" in the world file.  It
requires gentoolkit.  It basically looks at packages in world that have
reverse dependencies also in world (but only goes one level deep).  Just

# auditworld < /var/lib/portage/world

http://paste.pocoo.org/show/302273/

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Stroller]

On 8/12/2010, at 4:11pm, Albert Hopkins wrote:
> ...
> I have a script I used to locate "redudancies" in the world file.  It
> requires gentoolkit.  It basically looks at packages in world that have
> reverse dependencies also in world (but only goes one level deep).  Just
> 
> # auditworld < /var/lib/portage/world
> 
> http://paste.pocoo.org/show/302273/

I think this only works on ~ARCH, right?

On x86 I get:

Traceback (most recent call last):
  File "./auditworld", line 20, in <module>
    import gentoolkit.sets
ImportError: No module named sets

Stroller

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Albert Hopkins]

On Wed, 2010-12-08 at 16:28 +0000, Stroller wrote:

> > http://paste.pocoo.org/show/302273/
> 
> I think this only works on ~ARCH, right?
> 
> On x86 I get:
> 
> Traceback (most recent call last):
>   File "./auditworld", line 20, in <module>
>     import gentoolkit.sets
> ImportError: No module named sets
> 

... probaby.  I have an older (untested) version you can try:

http://paste.pocoo.org/show/302309/

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Kevin O'Gorman]

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On Wed, Dec 8, 2010 at 8:28 AM, Stroller <stroller@stellar.eclipse.co.uk>wrote:

>
> On 8/12/2010, at 4:11pm, Albert Hopkins wrote:
> > ...
> > I have a script I used to locate "redudancies" in the world file.  It
> > requires gentoolkit.  It basically looks at packages in world that have
> > reverse dependencies also in world (but only goes one level deep).  Just
> >
> > # auditworld < /var/lib/portage/world
> >
> > http://paste.pocoo.org/show/302273/
>
> I think this only works on ~ARCH, right?
>
> On x86 I get:
>
> Traceback (most recent call last):
>  File "./auditworld", line 20, in <module>
>    import gentoolkit.sets
> ImportError: No module named set
>

Are you sure it's even it gentoolkit?  I have that but no auditworld on x86.
It's not in gentoolkit-dev either.

-- 
Kevin O'Gorman, PhD

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Re: [gentoo-user] Remove redundant entries in "world" - howto

[Sebastian Beßler]

> Are you sure it's even it gentoolkit?  I have that but no auditworld on x86.
> It's not in gentoolkit-dev either.

It's not IN gentoolkit, it NEEDS gentoolkit.

It is here: http://paste.pocoo.org/show/302273/

Greetings

Sebastian Beßler

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Helmut Jarausch]

On 12/08/10 17:11:58, Albert Hopkins wrote:
> I have a script I used to locate "redudancies" in the world file.  It
> requires gentoolkit.  It basically looks at packages in world that
> have
> reverse dependencies also in world (but only goes one level deep). 
> Just
> 
> # auditworld < /var/lib/portage/world
> 
> http://paste.pocoo.org/show/302273/

Many thanks, I've updated it a bit to generate a new world
file (using python3)
http://paste.pocoo.org/show/302337/
One should have a look at the diffs (e.g. meld) before replacing
the old world file.

Helmut.

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Daniel Pielmeier]

Helmut Jarausch <jarausch@igpm.rwth-aachen.de>:
> Hi,
>
> does anybody know about an easy method to remove all entries from
> /var/lib/portage/world
> which would have been pulled in anyway
> even if they were not contained in world.
>
> My current attempt would be to write a script
> which executes emerge -vpc on each entry in world.
> If it wouldn't be removed it's obsolete in world.
>
> Unfortunately this has to be done in several rounds.

As far as I know there is currently no tool available for something like this.

I have a skript which runs emerge -pv --depclean for every entry in
world. If depclean returns reverse dependencies the package in
question is redundant in world. It takes quite some time but works
reliable. There are false positives for packages with PDEPENDS, but
you will recognize this when "emerge -pv --depclean" wants to remove
packages which you want to keep afterwards and you can add them back
manually.

Another method would be removing the world file (backup before) and
run the regenworld script afterwards. The result is not really minimal
so there will still be redundant entries.

I asked the portage maintainer about such a tool, as it would be best
if it uses the portage API to speed things up. He didn't not see the
point of such a script but thought about writing something which
creates a minimal word file. If you want such a functionality I
recommend to open a bug about it.

-- 
Daniel Pielmeier

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Johannes Kimmel]

On 12/08/2010 12:23 PM, Helmut Jarausch wrote:
> Hi,
>
> does anybody know about an easy method to remove all entries from
> /var/lib/portage/world
> which would have been pulled in anyway
> even if they were not contained in world.
>
> My current attempt would be to write a script
> which executes emerge -vpc on each entry in world.
> If it wouldn't be removed it's obsolete in world.
>
> Unfortunately this has to be done in several rounds.
>
> Many thanks for a hint,
> Helmut.
>
>

Hi,

I wanted to add, that a minimal world in my opinion isn't always what 
you want. For example in the time I searched for a suitable window 
manager for me I did a lot of depclean these days and accidently removed 
the xserver. There was no harm done, but I figured, that my world file 
should contain all packages, that should never removed automatically 
unless I want to. This way there is a little less danger involved using 
depclean. So this type of work might only be done by hand.

Johannes Kimmel

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Pau Peris]

The following lines creates an auditWorldFile.log log file which will
show packages requires by other packages, so theones you can safely
remove.


#!/bin/bash

n=`wc -l /var/lib/portage/world|awk '{ print $1 }'`;
for i in `seq 1 $n`;do
        pkg=`cat /var/lib/portage/world|head -n$i|tail -n1`;
        echo -e "Packages depending on $pkg." >> /tmp/auditWorldFile.log
        equery d $pkg >> /tmp/auditWorldFile.log
        echo -e "" >> /tmp/auditWorldFile.log
done;


2010/12/8 Johannes Kimmel <johannes.kimmel@gmx.de>:
> On 12/08/2010 12:23 PM, Helmut Jarausch wrote:
>>
>> Hi,
>>
>> does anybody know about an easy method to remove all entries from
>> /var/lib/portage/world
>> which would have been pulled in anyway
>> even if they were not contained in world.
>>
>> My current attempt would be to write a script
>> which executes emerge -vpc on each entry in world.
>> If it wouldn't be removed it's obsolete in world.
>>
>> Unfortunately this has to be done in several rounds.
>>
>> Many thanks for a hint,
>> Helmut.
>>
>>
>
> Hi,
>
> I wanted to add, that a minimal world in my opinion isn't always what you
> want. For example in the time I searched for a suitable window manager for
> me I did a lot of depclean these days and accidently removed the xserver.
> There was no harm done, but I figured, that my world file should contain all
> packages, that should never removed automatically unless I want to. This way
> there is a little less danger involved using depclean. So this type of work
> might only be done by hand.
>
> Johannes Kimmel
>
>

Re: [gentoo-user] Remove redundant entries in "world" - howto

[Frank Steinmetzger]

On Wednesday 15 December 2010 19:24:22 Pau Peris wrote:

> n=`wc -l /var/lib/portage/world|awk '{ print $1 }'`;
> for i in `seq 1 $n`;do
>         pkg=`cat /var/lib/portage/world|head -n$i|tail -n1`;
>         echo -e "Packages depending on $pkg." >> /tmp/auditWorldFile.log
>         equery d $pkg >> /tmp/auditWorldFile.log
>         echo -e "" >> /tmp/auditWorldFile.log
> done;

or without the counting loop:

while read pkg; do
	echo ....
done < /var/lib/portage/world

;-)
-- 
Gruß | Greetings | Qapla'
Beamy, Scot me up!