[wpkg-users] Strict depend/chain checks or conflicts on 1.3.1?

[Rainer Meier]

Hi Marco,

On 19.06.2014 18:24, Marco Gaiarin wrote:
> Mandi! Rainer Meier
>    In chel di` si favelave...
>
>> WPKG will in your case obviously first apply the libreoffice-help-it
>> package which is very likely directly assigned in profile.
>
> Ahem, no, in profile i set only:
>
> 	<package package-id="libreoffice" />
>
> So i suppose thatm, because 'libreoffice' chain 'libreoffice-help-it'
> and 'libreoffice-help-it' depend on 'libreoffice', there's no
> circularity.

There is. Chains are processed before the package installation is finished 
(since chained packages are part of the package installation which executes the 
chain). So therefore it still leads to circular dependency.

But in your log I see clearly that the execution starts at libreoffice-help-it 
and not at libreoffice. So the execution goes exactly as I described:
-> libreoffice-help-it -> libreoffice -> libreoffice-help-it


> Probably i've missed that:
>
>> (well, actually it's in the middle of it but WPKG would enter
>> vicious circle now entering installation of libreoffice-help-it
>> again).
>
> so, if i've understood well, 'chain' mean that i install BEFORE
> (or AT THE SAME TIME) 'libreoffice-help-it'. Right?

Chain means the package which is chained is executed right after all commands of 
the package which specifies the chain. But since exit status of chained/depends 
packages is evaluated to the package which specifies the chain is NOT finished 
until all chains/depends/includes are finished.

So in your case libreoffice will chain libreoffice-help-it and therefore after 
executing all libreoffice commands it will start execution of 
libreoffice-help-it. This will take place before libreoffice package is finally 
terminated since libreoffice needs to know the success state of 
chains/depends/includes in order to know the success state of libreoffice.


>> The result at the end is a completely updated system including
>> libreoffice and libreoffice-help-it packages. Even though an error
>> is reported due to internal dependency cycle.
>
> Yes, i've not run two time WPKG to keep log, and after posting that
> message i've found that effectively, all installation goes well.

I think on next WPKG run you won't have an error printed any more since all 
packages are updated successfully. The algorithm of WPKG just prevents loops and 
in your case even with circular dependency everything installs fine.


br,
Rainer