can a

rule

have no input parameters? I can't seem to find any example in the repo. My use case is that a rule makes a

Process

call and returns a scalar value; it doesn't really need any inputs. Right now I have to do

await Get(OutputClass, str, "")

with the rule being

async def foo(dummy: str = "") -> OutputClass:

to satisfy the build graph.

It's valid to have no params. You would either put the type in the "calling" rule's function signature, or use

Get(OutputClass, {})

. We want to simplify that to

Get(OutputClass)

if you have any interest in implementing that syntactic sugar 🙂