Mailinglist Archive: zypp-devel (56 mails)

["Boyd Timothy" <btimothy@xxxxxxxxx>]

On Dec 14, 2007 2:54 PM, Michael Andres <ma@xxxxxxx> wrote:
> On Thu, Dec 13, Michael Andres wrote:
>
> > > Please take a minute and review the following code:
> > >
> > > http://pastebin.ca/812178
> [...]
> > Is this what you had in mind?  Isn't there an easier way to get this
> > information?
> >
> > I noticed that this only works for packages that are not installed.
> > Is there a mechanism that would work for packages that are installed?
>
> Attached a small test program. Maybe you want to give it a try and see
> whether it matches your expectations. It computes 'dependent packages'
> (whatever this exacly means) for both, installed and available packages.
>
> 'NAME [EDITION [ARCH]]:' is a prompt. Enter a name and it looks for the
> best available package. If you specify an edition, it will first look for
> an installed one:
>
>
>   NAME [EDITION [ARCH]]: A
>   AdobeICCProfiles (I 2.0-74)(A 2.0-74.1 2.0-74 2.0-74)
>
>   NAME [EDITION [ARCH]]: AdobeICCProfiles
>   Package: U__s_[S1:1][package]AdobeICCProfiles-2.0-74.1.noarch
>   depends on (0) {}
>
>   NAME [EDITION [ARCH]]: AdobeICCProfiles  2.0-74
>   Package: I_TsU[S0:0][package]AdobeICCProfiles-2.0-74.noarch
>   depends on (0) {}
>
>             U__s_.. - U means uninstalled
>             I_TsU.. - I means installed
>
>
>
> A more exiting ;=O example:
>
> NAME [EDITION [ARCH]]: sendmail
> Package: U__s_[S1:1][package]sendmail-8.14.1-53.1.x86_64
>  depends on (16) {
>   I__s_[S0:0][package]filesystem-10.3-50.x86_64
>   I__s_[S0:0][package]sed-4.1.5-64.x86_64
>   I__s_[S0:0][package]fillup-1.42-179.x86_64
>   I__s_[S0:0][package]coreutils-6.9-43.x86_64
>   I__s_[S0:0][package]glibc-2.6.1-18.3.x86_64
>   I__s_[S0:0][package]libopenssl0_9_8-0.9.8e-45.5.x86_64
>   I__s_[S0:0][package]libdb-4_5-4.5.20-29.x86_64
>   I__s_[S0:0][package]openldap2-client-2.3.37-20.x86_64
>   I__s_[S0:0][package]cyrus-sasl-2.1.22-82.x86_64
>   I__s_[S0:0][package]tcpd-7.6-791.x86_64
>   I__s_[S0:0][package]m4-1.4.10-17.x86_64
>   I__s_[S0:0][package]netcfg-10.3-39.noarch
>   I__s_[S0:0][package]procmail-3.22-139.x86_64
>   I__s_[S0:0][package]bash-3.2-61.x86_64
>   I__s_[S0:0][package]perl-base-5.8.8-76.2.x86_64
>   I__s_[S0:0][package]insserv-1.09.0-46.x86_64
> }
> NAME [EDITION [ARCH]]: postfix
>  Package: U__s_[S1:1][package]postfix-2.4.5-20.1.x86_64
>  depends on (15) {
>   I__s_[S0:0][package]openldap2-client-2.3.37-20.x86_64
>   I__s_[S0:0][package]insserv-1.09.0-46.x86_64
>   I__s_[S0:0][package]sed-4.1.5-64.x86_64
>   I__s_[S0:0][package]fillup-1.42-179.x86_64
>   I__s_[S0:0][package]coreutils-6.9-43.x86_64
>   I__s_[S0:0][package]glibc-2.6.1-18.3.x86_64
>   I__s_[S0:0][package]libopenssl0_9_8-0.9.8e-45.5.x86_64
>   I__s_[S0:0][package]pcre-7.2-14.2.x86_64
>   I__s_[S0:0][package]libdb-4_5-4.5.20-29.x86_64
>   I__s_[S0:0][package]cyrus-sasl-2.1.22-82.x86_64
>   I__s_[S0:0][package]netcfg-10.3-39.noarch
>   I__s_[S0:0][package]bash-3.2-61.x86_64
>   I__s_[S0:0][package]grep-2.5.2-28.x86_64
>   I__s_[S0:0][package]pwdutils-3.1.4-27.x86_64
>   I__s_[S0:0][package]gawk-3.1.5g-25.x86_64
> }
>
>
>
> Compared to http://pastebin.ca/812178:
>
> - I load all the repos AND the target system. This is necessary to process
>   installed packages and IMO gives a better result for available packages.
>
> - In 'FindDependent' I get the interesting PoolItem via 'getPi'. You use
>   the PoolProxy class and get the selectable->candidateObj().
>
>   Even if the candidateObj's edition does not match the one you're looking
>   for, it might be that a package with a matching edition is in the
>   Selctable. 'getPi' tries a bit harder to find a package with your
>   edition.
>
> - For solving I use 'setForceResolve( true )' to minimize the cases where
>   the solver fails. Otherwise sendmail in the example above would not
>   succeed, because it conflicts with my postfix installed.
>
>   And I don't solve installed items, which is ok provided the system is in
>   a consistent state. But one could as well solve in any case.
>
> - Finaly zypp::forEachPoolItemMatchedBy extracts the dependent packages.
>
>
>
>
> @ // TODO: Figure out how to determine whether a package is installed or not
>
> - You usually have a PoolItem pi
> - A PoolItem has a status: pi.status()
> - The status tells (among other things) whether it is installed:
>   pi.status().isInstalled()
>
> In your case: it->item.status().isInstalled()

Thanks Michael for the code, suggestions, and review.  I'll let you
know how the progress goes.

Boyd
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