Bug#92569: apt can't handle an upgrade of the xemacs21* packages

[Matt Zimmerman <mdz@debian.org>]

On Thu, May 17, 2001 at 10:18:13AM +0200, Adrian Bunk wrote:

> > > # apt-get install xemacs21 xemacs21-bin xemacs21-nomule xemacs21-support
> >...                                        ^^^^^^^^^^^^^^^
> 
> I tell apt explicitely to install xemacs21-nomule and this should fulfill the
> dependency above. More general:
> 
>   Package: a Depends: x | y | z
> 
> 
> Then an
> 
>   apt-get install a z
> 
> 
> wants to install package "x" additionally to "a" and "z".

I don't know if this is true or not, but it isn't implied by the example of
xemacs21, where the situation is somewhat different:

Package: xemacs21 Depends: xemacs21-mule
Package: xemacs21-nomule Provides: xemacs21

The order in which the packages are specified makes a difference.  If you
apt-get install xemacs21 xemacs21-nomule, you get xemacs21-mule, while if you
apt-get install xemacs21-nomule xemacs21, you don't (transcript below).

If xemacs21 were a pure virtual package, I might agree with you, but since
xemacs21 is a real package and you specifically asked to install it, I think
that apt is doing the right thing by installing the real package.  In fact, I
might question the case where 'install xemacs21-nomule xemacs21' *doesn't*
install xemacs21.

mizar:/home/mdz# apt-get install xemacs21-nomule xemacs21
Reading Package Lists... Done
Building Dependency Tree... Done
The following extra packages will be installed:
  libcompfaceg1 xemacs21-basesupport xemacs21-bin xemacs21-support 
The following NEW packages will be installed:
  libcompfaceg1 xemacs21 xemacs21-basesupport xemacs21-bin xemacs21-nomule
  xemacs21-support 
0 packages upgraded, 6 newly installed, 0 to remove and 0  not upgraded.
Need to get 18.3MB of archives. After unpacking 52.9MB will be used.
Do you want to continue? [Y/n] n
Abort.
mizar:/home/mdz# apt-get install xemacs21 xemacs21-nomule
Reading Package Lists... Done
Building Dependency Tree... Done
The following extra packages will be installed:
  libcompfaceg1 xemacs21-basesupport xemacs21-bin xemacs21-mule
  xemacs21-mulesupport xemacs21-support 
The following NEW packages will be installed:
  libcompfaceg1 xemacs21 xemacs21-basesupport xemacs21-bin xemacs21-mule
  xemacs21-mulesupport xemacs21-nomule xemacs21-support 
0 packages upgraded, 8 newly installed, 0 to remove and 0  not upgraded.
Need to get 23.0MB of archives. After unpacking 67.6MB will be used.
Do you want to continue? [Y/n] n
Abort.
mizar:/home/mdz# 


-- 
 - mdz