[Aptitude-devel] Bug#570377: aptitude chooses to remove packages instead of upgrading

[Daniel Hartwig]

On 6 February 2014 06:37, Vincent Lefevre <vincent at vinc17.net> wrote:
> On 2014-02-05 00:56:26 +0800, Daniel Hartwig wrote:
>> On 4 February 2014 19:53, Vincent Lefevre <vincent at vinc17.net> wrote:
>> > On 2014-02-04 10:49:53 +0800, Daniel Hartwig wrote:
>> >> Again, I am only addressing the proposed patch.  There are better
>> >> options, such as adjusting the default value of
>> >> Aptitude::ProblemResolver::SolutionCost to account for the number of
>> >> removals vs installs, or similar, but people should use such settings
>> >> and provide feedback on the quality of the solutions and their order.
>> >
>> > It would be better if aptitude could tell the reasons that led to the
>> > proposed solution.
>>
>> Do you mean:
>>
>>  --\ icedtea6-plugin depends upon openjdk-6-jre (= 6b18-1.8.13-0+squeeze2)
>>     -> Remove icedtea6-plugin [6b18-1.8.13-0+squeeze2 (now, oldstable)]
>>   --\ openjdk-6-jre depends upon libjpeg8
>>     -> Remove openjdk-6-jre [6b18-1.8.13-0+squeeze2 (now)]
>>
>> ?
>
> Something like that. Perhaps that's what the -v --show-why options do.
>

Use 'o' when examining a solution in the curses interface.  On the
command line, set Aptitude::CmdLine::Resolver-Show-Steps=1.