sbt build task to see dependencies in a project.

versionReport.sbt

//https://groups.google.com/forum/#!topic/simple-build-tool/rcPh-lWbDtk
lazy val versionReport = TaskKey[String]("version-report")

  // Add this setting to your project.
  versionReport <<= (externalDependencyClasspath in Compile, streams) map {
     (cp: Seq[Attributed[File]], streams) =>
       val report = cp.map {
         attributed =>
           attributed.get(Keys.moduleID.key) match {
             case Some(moduleId) => "%40s %20s %10s %10s".format(
               moduleId.organization,
               moduleId.name,
               moduleId.revision,
               moduleId.configurations.getOrElse("")
             )
             case None           =>
               // unmanaged JAR, just
               attributed.data.getAbsolutePath
           }
       }.mkString("\n")
       streams.log.info(report)
       report
    }