Broken dependency checking on software removal (does not handle or-depends)

[João Pinto]

Binary package hint: software-center

If you install 7zip and then try to remove it you will get a dialog saying that file-roller will need to be removed.
a) 7zip is not a depedency of file-roller
b) probably because of a) file-roller is not removed even if you choose to proceed

ProblemType: Bug
Architecture: amd64
Date: Sun Sep 27 23:34:20 2009
DistroRelease: Ubuntu 9.10
Package: software-center 0.4.0 (and 1.1.7 on lucid)
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-11.36-generic
SourcePackage: software-center
Uname: Linux 2.6.31-11-generic x86_64

[Michael Vogt (mvo)]

The problem is:

Package: file-roller
Depends: libc6 (>= 2.4), libgconf2-4 (>= 2.23.2), libglib2.0-0 (>= 2.18.0), libgtk2.0-0 (>= 2.16.0), liblaunchpad-integration1 (>= 0.1.17), libnautilus-extension1 (>= 1:2.26.2), libpango1.0-0 (>= 1.14.0), gconf2 (>= 2.10.1-2), tar (>= 1.13.25), bzip2 (>= 1.0.1), gzip (>= 1.3.2), unzip | p7zip-full, zip | p7zip-full

p7zip-full is part of a or-dependency group and that is not handled (yet) with software-store in the dependency checking (the low-level code will do the right thing, just the display is wrong).

[Matthew Paul Thomas (mpt)]

What is an "or-dependency group"? Does this require showing any interface that isn't designed yet, or does it just involve not showing the "These items must be removed as well" alert in some cases where it is currently shown?

[João Pinto (joaopinto)]

Matthew,
if you "apt-cache show file-roller" you get "..., unzip | p7zip-full, ...", the package depends on unzip or p7zip-full.

The dialog should not be shown if there is an alternative package installed to satisfy the dependency.

[Sebastian Heinlein (glatzor)]

You should use the Simulate method of a transaction to calculate the to be removed packages. Currently you just make a call to apt.Cache.get_installed_rdepends. This doesn't cover a full dependency resolution. Furthermore already queued transaction won't be taken into account. (see. distro/Ubuntu.py: get_removal_warning)

[Alberto Salvia Novella (es20490446e)]

If you are still experiencing this bug, please:

1. Into the tag list, add the first name of the affected release
2. Set this bug status back to "confirmed".

Thank you.

[Launchpad Janitor (janitor)]

[Expired for software-center (Ubuntu) because there has been no activity for 60 days.]