die function for RPM %pre, %post sections, etc

[Dan Trainor <info@xxxxxxxxxxxxxxxx>]

Hello, all -

I was wondering if RPM had a built-in "die" function, so that if I was
looking for some install prerequisites in %pre or some such, and if they
were not met, the RPM install would bail out with an error of my choice,
so that the install would not continue.

Anyone know if this is possible?

Thanks!
-dant