I've been reading and re-reading the docs, and everywhere it just says that by default sbt uses the project base directory and src/main/scala to look for scala sources, but I could not find any mention of how that default can be changed.
I have seen vague references to an "exclude" filters, but what I need is the opposite.
I would like to compile a subset of a large scala project into a smaller self-contained artifact. Is there a way to tell sbt exactly what files I want it to include? Something like "**/util/*.scala" for example?
It is possible to customize sources path in SBT:
scalaSource in Compile := baseDirectory.value / "src"
scalaSource in Test := baseDirectory.value / "test-src"
More in documentation.