Library for runtime application configuration—interested?

[christhekeele]

It seems our heads are in the same place:

@hst337

That’s a great description, but in my opinion you’re trying to solve problem which is not actually that important for the ecosystem.

Configuring applications at runtime is not a problem of changing a value, but really is a problem of propagating the changed value, and at most of the times this propagation must be as much as consistent and as atomic as possible.

Application.put_env is not working. We need hooks for reconfiguration or something like this.

Hard, right? Now imagine this pool is distributed.

So, if I was up to writing a configuration library, I would start with adopting existing places where developers usually put the values they’ve read from configuration like persistent_term, ets, GenServer’s state. Next thing I would do, I would think about some configuration hook system, or something like this to have actions running when the values in the store are changed. And the last thing, I would provide some interfaces for tracking the transactional reconfigurations

I think you’re gonna love where I want to take this project, then! Admittedly, I’m targeting something smaller initially, but if you read through the aspirational goals, you’ll notice these are the problems I’m reaching towards. I think I’ve found the right level of core abstraction that is extensible to solve these problems, and want to ship that first—we’ll see how it goes from there!