I searched the existing forums and didn't find an answer, and I tried a bunch of boolean stuff and it didn't work.
Recently discovered my CD ripping program has been putting the record label in different fields for mp3s vs. FLACs. I had planned to copy those values into COPYRIGHT with some extra text added on with a custom action. Everything I try to accomplish just ends up swapping empty field value with the occupied field value.
So I'm trying to figure out an action where if the one field value, PUBLISHER, has data it will copy it to COPYRIGHT. If PUBLISHER is empty, then it can be assumed LABEL is not empty, and it will copy LABEL to COPYRIGHT.
My attempt was $if(length(%publisher%=0),%label%,%publisher)