Since my dataflow li­brary Croupi­er is sort-of-­func­tion­al, I need­ed a project where I could ex­er­cise it.

This is im­por­tan­t, be­cause it's how you know if the de­sign of a li­brary is good, ex­ten­si­ble, and so on.

So, I de­cid­ed to write a min­i­mal make-­like-thing.

Well, good news, that was easy!

In about 50 lines of code I could write a thing that will run shell com­mands in a de­pen­den­cy dataflow!

It's called Hacé (don't both­er about how to pro­nounce it, I don't care) which is "im­per­a­tive make, sec­ond per­son sin­gu­lar" in ar­gen­tini­an span­ish, so it's an or­der to make.

I will spend a week or two mak­ing it in­to some­thing semi-use­ful, since it has some ad­van­tages over Make­files, such as re­act­ing to file con­tent and not file date, but its des­tiny is prob­a­bly just to be a test­bed for Croupi­er.