On 10/20/2017 6:24 PM, Ken Brown wrote:
> Jon,
> 
> Have you ever tested the "obsoletes:" feature of setup/libsolv?  I tried 
> adding an "obsoletes:" line to setup.ini, and it didn't seem to have any 
> effect.

It turns out that it *is* working (after a minor fix, attached), but not 
always as I expect.  Suppose A requires B and C obsoletes B.  Then the 
"obsoletes" statement appears to have no effect.  If I remove the 
dependence of A on B, then setup does propose uninstalling B and 
installing C.

I guess the issue is that libsolv interprets "C obsoletes B" as 
"uninstall B and install C", and it won't uninstall B while something 
requires it.

Ken