Scala script from within a Bash

docker_build.sh

#!/bin/sh
exec scala "$0" "$@"
!#

/***
scalaVersion := "2.11.11"

libraryDependencies ++= Seq(
  "com.typesafe" % "config" % "1.3.1"
)
*/

import java.io.File
import com.typesafe.config.{Config, ConfigFactory}
import sys.process._

case class JavaConfig(jreVersion: Int)
case class PythonConfig(pythVersion: Int)

object DockerBuild {
  def main(args: Array[String]) {
    println("My mission is to build Docker base images!")
    buildImage(loadConfig("application.conf"))
  }

  def loadConfig(cfgFileName: String): Config = {
    ConfigFactory.parseFile(new File(s"conf/$cfgFileName")).resolve()
  }

  def buildImage(cfg: Config) = {
    buildJavaImages(JavaConfig(jreVersion = cfg.getInt("docker.build.java.version")))
  }

  def buildJavaImages(javaCfg: JavaConfig) = {
    s"docker build --build-arg JRE_VERSION=${javaCfg.jreVersion} --tag=jothi/jre-alpine java/" !
  }
}
DockerBuild.main(args)