Setting a key local.sbt so that it is applied in a multi-project

Question

How do I set key in a local.sbt in such a way that every subproject finds it ?

I'm trying to use Coursier plugin in a multi project, but since I'm testing it, I'm trying not to check it in in our git repo.

So I put it in my project/local.sbt and I was trying to set coursierUseSbtCredentials := true in a local.sbt. This has no visible effect.

• The authenticated nexus is defined in the commonSettings val in my build.sbt

  val commonSettings = Seq(
    ...
    resolvers += "my-nexus" at "http://blah",
    credentials += ... 
  )
  

  which every sub-project uses with .settings(commonSettings) (as per best-practices guide)

• If I put coursierUseSbtCredentials := true in commonSettings it does work, but then I'd have to add it in my build.sbt, which I would rather not do.

How do I set this key so that every subproject can see it and in such a way that it is external to the build.sbt file ? (e.g. local.sbt ?)

Answer 1

Create a local plugin at project/SetupCoursierPlugin.scala:

import sbt._

import coursier.CoursierPlugin, CoursierPlugin.autoImport._

object SetupCoursierPlugin extends AutoPlugin {
  override def requires = CoursierPlugin
  override def trigger  = allRequirements

  override def projectSettings = Seq(
    coursierUseSbtCredentials := true
  )
}