You’re managing your cloud infrastructure using Terraform. You’ve got your first environment up and running and you’re already reaping the benefits of a codified infrastructure. Changes are easy. But, now you need to set up a second environment (staging, prod, whatever) and you’re finding that managing this is not straight forward. There’s a bunch of arguments to remember every time you switch between environments, and your switching a lot because you want to keep them in sync. Because this is hard you tend to use auto-complete, but then sometimes you forget to change something and accidentally apply prods config to staging. Well, as in many occasions, a Makefile can probably help you there.