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pm-utils ping-pong upgrade/downgrade problem in F7



Hello,

pm-utils-0.99.3-6.fc7 and pm-utils-0.99.4-3.fc7 have a ping-pong 
upgrade/downgrade problem which bites smart:  pm-utils-0.99.3-6.fc7 obsoletes 
(unversioned!) radeontool and vbetool, pm-utils-0.99.4-3.fc7 requires them 
(unversioned too), resulting in:

# rpm -q pm-utils radeontool vbetool
pm-utils-0.99.4-3.fc7.x86_64
radeontool-1.5-2.fc7.x86_64
vbetool-0.7-2.fc7.x86_64

# smart upgrade
[...]
Upgrading packages (1):
  pm-utils-0 99 3-6 fc7 x86_64
Downgrading packages (1):
  pm-utils-0 99 3-6 fc7 x86_64

Here smart decides to downgrade to pm-utils-0.99.3-6.fc7 because it sees it 
obsoletes the installed radeontool and vbetool versions.  Once the downgrade 
is done, vbetool and radeontool are gone too.  The "Upgrading packages" 
message looks like a smart bug, ditto the fact that it doesn't say beforehand 
that it's going to remove radeontool and vbetool.  Anyway, after that 
transaction:

# smart upgrade
[...]
Upgrading packages (1):
  pm-utils-0 99 4-3 fc7 x86_64
Downgrading packages (2):
  radeontool-1 5-2 fc7 x86_64   vbetool-0 7-2 fc7 x86_64

Ok, back we go to 0.99.4-3.fc7, and get radeontool and vbetool back too.  
After that, again:

# smart upgrade
[...]
Upgrading packages (1):
  pm-utils-0 99 3-6 fc7 x86_64
Downgrading packages (1):
  pm-utils-0 99 3-6 fc7 x86_64

Etc etc.  Duh.  yum does not appear to be affected by this.  I suppose this 
could be argued to be a bug either in smart or yum (I don't have that strong 
opinions about which one it is although yum behaves in the desired way in 
this particular case), but it once again provides one example why unversioned 
Obsoletes and Provides are bad (which is why I'm posting here instead of 
reporting this to Bugzilla).

I'm not sure about this and haven't tested, but I guess adding
    Obsoletes: pm-utils < %{version}-%{release}
to the new pm-utils could help smart get over it.  Thoughts?


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