Where do I find the file that controls if a unit action is turn ending or not?

[criZp]

I was thinking of making a mod that makes promotions work more like in civ 5, where giving the promotion doesn't heal the unit, but also isn't turn ending. Attacking and pillaging isn't always turn ending (depending on how many move points the unit got left), so should be possible to do the same with promoting?

But I've looked through a lot of files now, and can't find any place where this is controlled. Does anybody know where it is?