Bug#658812: dpkg: Please add a hint in arch_remove about installed foreign packages

[Cyril Brulebois]

Package: dpkg
Version: 1.16.2~wipmultiarch
Severity: wishlist
Tags: patch

Hi,

let's go through the BTS since I see no experimental branch in the dpkg
repository… For the same reason, I'm attaching a debdiff rather than a
git commit.

It helped me tracked down all installed foreign packages, even though I
needed gdb to track down the last package.
 
Mraw
KiBi.

-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages dpkg depends on:
ii  libbz2-1.0   1.0.6-1
ii  libc6        2.13-26
ii  libselinux1  2.1.0-4.1
ii  tar          1.26-4
ii  xz-utils     5.1.1alpha+20110809-3
ii  zlib1g       1:1.2.5.dfsg-1.1

dpkg recommends no packages.

Versions of packages dpkg suggests:
ii  apt  0.8.15.9

-- no debconf information

diff -Nru dpkg-1.16.2~wipmultiarch/debian/changelog dpkg-1.16.2~wipmultiarch+kibi1/debian/changelog
--- dpkg-1.16.2~wipmultiarch/debian/changelog	2012-02-05 22:53:48.000000000 +0000
+++ dpkg-1.16.2~wipmultiarch+kibi1/debian/changelog	2012-02-06 03:07:28.000000000 +0000
@@ -1,3 +1,11 @@
+dpkg (1.16.2~wipmultiarch+kibi1) experimental; urgency=low
+
+  * When removing a foreign architecture fails due to some foreign
+    packages still being installed, mention the first one of them to
+    help users find out which packages to get rid of.
+
+ -- Cyril Brulebois <k...@debian.org>  Mon, 06 Feb 2012 03:05:44 +0000
+
 dpkg (1.16.2~wipmultiarch) experimental; urgency=low
 
   This is a WIP release, command line interfaces *will* change.
diff -Nru dpkg-1.16.2~wipmultiarch/src/main.c dpkg-1.16.2~wipmultiarch+kibi1/src/main.c
--- dpkg-1.16.2~wipmultiarch/src/main.c	2012-02-05 22:53:04.000000000 +0000
+++ dpkg-1.16.2~wipmultiarch+kibi1/src/main.c	2012-02-06 02:24:14.000000000 +0000
@@ -537,8 +537,8 @@
         warning(_("removing architecture '%s' currently in use by database"),
                 arch->name);
       else
-        ohshit(_("cannot remove architecture '%s' currently in use by the database"),
-               arch->name);
+        ohshit(_("cannot remove architecture '%s' currently in use by the database (for at least '%s')"),
+               arch->name, pkg->set->name);
       break;
     }
   }