%triggerpostun fires all the time

[Kai <kaisung gmail com>]

Hi,

I've create an rpm package named mypackage-3.0-1.i386.rpm that contains a triggerpostun section like this:

%triggerpostun -- mypackage < 2.0-1
echo Running trigger for %{version}-${release}


I expect the trigger to only run when upgrading a version of mypackage
less than 2.0-1.   However, it appears the trigger is run no matter
what version is being upgraded.

Can someone explain me the syntax and semantics of the triggerpostun directive?

Thanks,
-Kai