example cross building sbt config file

Build.scala

import sbt._
import sbt.Keys._

object ScalaTestEmbededMongoBuild extends Build {
    lazy val root = Project(id = "simplyscala-server", base = file("."),
        settings = Project.defaultSettings ++ Seq(
            name := "scalatest-embedmongo",
            organization := "com.github.simplyscala",
            description := "API to use embeded mongoDb database for testing in Scala",

            version := "0.2.2",

            scalaVersion := "2.10.1",

            crossScalaVersions := Seq("2.9.1", "2.9.2", "2.10"),

            libraryDependencies <++= (scalaVersion) { scalaVersion => Seq(
                "de.flapdoodle.embed" % "de.flapdoodle.embed.mongo" % "1.41",
                "org.scalatest" %% "scalatest" % CrossDependencies.scalatest_version(scalaVersion) % "test",
                "com.novus" %% "salat" % CrossDependencies.salat_version(scalaVersion) % "test")
            )},
        )
    )

    object CrossDependencies {
        def scalatest_version(scala_version: String) = if(scala_version startsWith "2.9") "1.8" else "1.9.1"
        def salat_version(scala_version: String) = if(scala_version startsWith "2.9") "1.9.2-SNAPSHOT" else "1.9.5"
    }
}