build.sbt

slick <<= slickCodeGenTask

lazy val slick = TaskKey[Seq[File]]("gen-tables")

lazy val slickCodeGenTask = (baseDirectory, dependencyClasspath in Compile, runner in Compile, streams) map {
  (dir, cp, r, s) =>
    println()
    val outputDir = (dir / "app" ).getPath // place generated files in app sources folder
    val url = "jdbc:postgresql://host:port/database"
    val jdbcDriver = "org.postgresql.Driver"
    val slickDriver = "scala.slick.driver.PostgresDriver"
    val pkg = "models.db"
    val cp2 = cp.files ++ Seq(new java.io.File((dir / "target" / "scala-2.10" / "classes").getPath))
    toError(r.run("sbt.CustomSourceCodeGenerator", cp2, Array(slickDriver, jdbcDriver, url, outputDir, pkg, "user", "password"), s.log))
    val fname = outputDir + "/models/db/Tables.scala"
    Seq(file(fname))
}