What makes tup amazing is it traces which files a program touches, so assuming your programs obey the rule "I need to rerun if I have different command line arg

What makes tup amazing is it traces which files a program touches, so assuming your programs obey the rule "I need to rerun if I have different command line arguments or something I read has changed", you get perfect dependencies for any program. I use it for running experiments with custom programs and scripts all the time, and it just refund the parts I need.