Sat Dec 1 12:01:11 EST 2018

Naming pull and push side

( This is going to be obscure missing context.  No time to explain.. )

What is this pattern?
- binary is called "run_codegen"
- source is called "makefile.hs"

Inbetween sits "build".  Why is the outside (the binary) different
from the inside (the data structure passed to "build").

Basically, malke "build" explicit.

makefile.hs could be a separate module exporting only a data