alt Hacker NewsI do this with plain ol' makefiles.
Even for projects where Make isn't part of the build pipeline, like Rails or C++, I have a standardized makefile I put in the project root, using includes for "secrets.mk", so I can do things like "make deploy" and it Just Works(tm).
Sometimes the old ways are best!
Another neat and simple trick it to have the first target in the Makefile print out a helpful message that tells the reader what the project is and how to use it. One of those things that is useful both when you are working on the project and when you later return to it, years later.