[op-sepp] Package dependencies only work on installing but not on removing packages

[Frank Thommen]

Hi Tobi,

basically I agree and I might go this way. But it requires lots of 
discipline by the software maintainers (which I can't really rely on 
here :-).  E.g. if an additional dependency (PATH, LD_LIBRARY_PATH, 
etc.) is added to start.pl after installation, this will not be 
reflected in the reverse index unless the respective seppadm function 
(install/webbuild/...) is run.  Adding to start.pl /after/ installation 
happens quite often in the case of complex scientific packages where 
dependencies appear only at runtime in specific functions (which are 
only used now and then).

Generally I'd need a foolproof mechanism which is probably still to 
check all META and start.pl files of all other packages when a package 
is removed.  This will require some time but we don't often remove 
package anyway ;-)

Cheers
frank


On 18.04.13 18:45, Tobi Oetiker wrote:
> Frank,
>
> I guess you would have to build a reverse index, but sinc you could store it like the other indexes which are already being built, this would not be all that difficult.
>
> cheers
>
> Tobias Oetiker
> tobi at oetiker.ch
> 062 775 9902
>
> On 18.04.2013, at 11:08, Frank Thommen <frank.thommen at embl-heidelberg.de> wrote:
>
>> Hi
>>
>> package dependencies are only checked at package installation time, but
>> not when UNinstalling them.  We have several time run into issues,
>> because a package has been removed which was required by others.
>>
>> Can you think for an easy way to implement such a check at
>> deinstallation time w/o searching through all META files of all other
>> packages?
>>
>> Cheers
>> frank
>>
>> --
>> Frank Thommen - Structures IT Management and Support - EMBL Heidelberg
>> frank.thommen at embl-heidelberg.de - +49 6221 387 8353
>>
>> _______________________________________________
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>>


-- 
Frank Thommen - Structures IT Management and Support - EMBL Heidelberg
frank.thommen at embl-heidelberg.de - +49 6221 387 8353