How to inherit unmanaged dependencies in submodules in sbt?

Question

I have a project which looks like this, using sbt 0.13.2:

base
 - project
   - Build.scala
   - plugins.sbt
 - lib
   - unmanaged jar #1
   - unmanaged jar #2
 - core
    - src
      - .......
 - clp
    - src 
      - .......
 - server
    - src
      - ......

where core contains common code and clp and server are two related projects which both depend on core.

I'm trying to find the right mojo in Build.scala such that all three of these modules depend on base/lib. Currently I'm cheating by using a symlink'd lib dir in each of the modules, but I'd like to do it automatically without the symlinks.

Here's an example of Build.scala file - how should I modify this to make the dependencies work?

import sbt._
import Keys._

object RootBuild extends Build {
  lazy val buildSettings = Defaults.defaultSettings ++ Seq(
    scalaVersion := "2.11.1",
    unmanagedBase := baseDirectory.value / "lib"
  )

  lazy val standardSettings = buildSettings ++ Seq(
    libraryDependencies ++= Seq(
      "org.scalatest" % "scalatest_2.11" % "2.1.6" % "test",
      "org.testng" % "testng" % "6.8.8"
    )
  )

  lazy val Projects = Seq(root, core, clp)

  lazy val root = Project("root", file("."), settings=standardSettings) aggregate(core, clp)
  lazy val core = Project("core", file("core"), settings=standardSettings)
  lazy val clp = Project("clp", file("clp"), settings=standardSettings) dependsOn core
  lazy val server = Project("server", file("server"), settings=standardSettings) depensOn core
}

Answer 1

This is a correct build.sbt:

lazy val a, b = project settings(
  Defaults.defaultSettings ++ Seq(
    unmanagedBase := (unmanagedBase in ThisProject).value
  ): _*
)

The idea is to set unmanagedBase for the submodules based upon the value of the setting in the root project (that's defined implicitly).

In your particular case it'd be as follows:

import sbt._
import Keys._

object RootBuild extends Build {
  lazy val buildSettings = Defaults.defaultSettings ++ Seq(
    scalaVersion := "2.11.1"
  )

  lazy val standardSettings = buildSettings ++ Seq(
    libraryDependencies ++= Seq(
      "org.scalatest" % "scalatest_2.11" % "2.1.6" % "test",
      "org.testng" % "testng" % "6.8.8"
    )
  )

  lazy val submoduleSettings = standardSettings ++ Seq(
    unmanagedBase := (unmanagedBase in ThisProject).value    
  )

  lazy val root = project in file(".") settings(standardSettings: _*) aggregate(core, clp)
  lazy val core = project settings(submoduleSettings: _*)
  lazy val clp = project settings(submoduleSettings: _*) dependsOn core
  lazy val server = project settings(submoduleSettings: _*) dependsOn core
}