I've got a large data analysis project containing dozens of R scripts that depend in complicated ways on each other and so I thought it would be a good idea to formalize all these dependencies and set the project in a build system that runs things in the correct order and re-runs anything that changes or anything that's downstream from things that change.
But even after some hours worth of googling I haven't found any build systems that are custom-made for R (though there are plenty for more genreal purposes). I've previously worked with waf to organize data analysis projects in Python and know I could use waf to run R scripts as well. But having to manage a whole Python environment just to run some R scripts seems clunky.
What are other people using to solve this problem?