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

[Andrei POPESCU]

On Sb, 08 feb 14, 19:45:11, Chris Tillman wrote:
> 
> OK, so my proposal is to set the default SolutionCost to "safety, removals"
> or else "safety, priority, removals", figure out what the performance
> problems are with these and resolve them before releasing. You suggested
> adjusting the default SolutionCost Daniel, rather than the default safety
> cost for removals, which to me is a much better way of stating that we like
> removals slightly less than we like install-default or keep. How about it?

Your proposal is definitely an improvement, however:

# LANG=C aptitude full-upgrade
The following packages will be upgraded: 
  libldb1 
1 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 109 kB of archives. After unpacking 27.6 kB will be freed.
The following packages have unmet dependencies:
 samba-libs : Depends: libldb1 (< 1:1.1.17~) but 1:1.1.17-1 is to be installed.
The following actions will resolve these dependencies:

      Remove the following packages:              
1)      gvfs-backends                             
2)      kde-runtime                               
3)      konsole                                   
4)      krusader                                  
5)      libsmbclient                              
6)      lokalize                                  
7)      mplayer2                                  
8)      phonon-backend-vlc                        
9)      samba-libs                                
10)     smplayer                                  
11)     smplayer-l10n                             
12)     vlc                                       
13)     vlc-nox                                   
14)     vlc-plugin-notify                         
15)     vlc-plugin-vlsub                          
16)     xbmc                                      
17)     xbmc-bin                                  

      Leave the following dependencies unresolved:
18)     gnome-bluetooth recommends gvfs-backends  
19)     kdelibs5-plugins recommends kde-runtime   
20)     pacpl recommends mplayer                  
21)     pcmanfm recommends gvfs-backends          
22)     tuxcmd-modules recommends gvfs-backends   
23)     youtube-dl recommends mplayer2 | mplayer  


Accept this solution? [Y/n/q/?] n
The following actions will resolve these dependencies:

     Keep the following packages at their current version:
1)     libldb1 [1:1.1.16-1 (now, testing)]                



Accept this solution? [Y/n/q/?] y
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
Need to get 0 B of archives. After unpacking 0 B will be used.


I tried the default, "safety,priority,removals", "safety,removals", but 
only "removals" comes up with the correct solution:

# LANG=C aptitude full-upgrade
The following packages will be upgraded: 
  libldb1 
1 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 109 kB of archives. After unpacking 27.6 kB will be freed.
The following packages have unmet dependencies:
 samba-libs : Depends: libldb1 (< 1:1.1.17~) but 1:1.1.17-1 is to be installed.
The following actions will resolve these dependencies:

     Keep the following packages at their current version:
1)     libldb1 [1:1.1.16-1 (now, testing)]                



Accept this solution? [Y/n/q/?] y
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
Need to get 0 B of archives. After unpacking 0 B will be used.

Hope this helps,
Andrei
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