Mailinglist Archive: zypp-devel (56 mails)

[Stefan Schubert <schubi@xxxxxxx>]

Duncan Mac-Vicar Prett schrieb:
> - Do a solver run for the case of installing a single package and see which 
> packages the solver mark for installation (isToBeInstalled() isBySolver()) 
> but this also would mark a broken requires for another package for 
> installation, like you have mplayer installed which depends on libsdl, but 
> libsdl was uninstalled by rpm -force, the solver will mark for installation 
> even if it is not a requires of foo, anyway I am not 100% sure if this is the 
> behavior libzypp does right now (moving the system automatically to a 
> consistant state).
>   
Ähm, the solver does regard dependencies of to be installed packages only.
So, if libsdl is not required by foo the solver will not blame the
requirements of
libsdl from mplayer.
Anyway, you need a solver run here. In this case you can use following
API of
the solver:

    /**
     * Gives information about WHO has pused an installation of an given
item.
     *
     * \param item    Evaluate additional information for this resolvable.
     * \return A list of structures which contains:
     *        item     Item which has triggered the installation of the
given param item.
     *        cap      Capability which has triggerd this installation
     *        capKind  Kind of that capability (e.g. 
Dep::REQUIRES,Dep::RECOMMENDS,... )
     *
     * Note: In order to have a result start a solver run before. Not
matter if it is valid or invalid.
     *
     */
    const solver::detail::ItemCapKindList isInstalledBy (const
PoolItem_Ref item);

    /**
     * Gives information about WHICH additional items will be installed
due the installation of an item.
     *
     * \param item     Evaluate additional information for this resolvable.
     * \return A list of structures which contains:
     *        item     Item which will be installed due to the
installation of the given param item too.
     *        cap      Capability which causes the installation
     *        capKind  Kind of that capability (e.g. 
Dep::REQUIRES,Dep::RECOMMENDS,... )
     *
     * Note: In order to have a result start a solver run before. Not
matter if it is valid or invalid.
     *
     */     
    const solver::detail::ItemCapKindList installs (const PoolItem_Ref
item);

I am not sure if we can provide this information in the future by the
new SAT-solver. But we
will try it. :-)
The other way (without solving) has been already described by Michl
Andres on this mailing-list.

Greetings
Stefan
-- 
*******************************************************************************
Stefan Schubert
SUSE LINUX GmbH - Maxfeldstrasse 5 - D-90409 Nuernberg, Germany
e-mail: schubi@xxxxxxx
-------------------------------------------------------------------------------
SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg)


-- 
To unsubscribe, e-mail: zypp-devel+unsubscribe@xxxxxxxxxxxx
For additional commands, e-mail: zypp-devel+help@xxxxxxxxxxxx