Does `sbt compile` install things out of the current project directory?

I am a noob in scala. I installed it using coursier and am using sbt to try and write code in it. Basically, I use the two commands sbt compile and sbt run for my code. Along, with that I was experimenting with build.sbt. It seems that I've downloaded too many scala versions while running sbt compile again and again.

I have few questions regarding sbt compile

• Does it install things like scala jars outside of the project directory?
• Is there a way to delete all the things that are installed by sbt compile? Basically, I have a knack to know what's going on in my pc when running commands. Keep things clean and get a view of what directories does sbt use to install things. I simply want to undo what sbt compile does and run it again to observe things.

sbt clean only affects the target directory.

Yes, sbt stores (install is kind of a heavy word here) everything it downloads in a cache directory, so that if multiple projects depend on the same tools then you don't need to re-download and re-store them.

The specific folder depends on your OS, but it usually is in your home under .coursier/cache or something similar: https://get-coursier.io/docs/cache#default-location

However, unless you are dealing with a weird bug or just want to free disk space, just doing sbt clean will ensure your project is in a clean state.