import java.io.{File, FileWriter}
import sbt._
import Keys._

object InitPlugin extends Plugin
{
  override lazy val settings = Seq(commands += initCommand)

  def using[A <: {def close(): Unit}, B](param: A)(f: A => B): B =
    try { f(param) } finally { param.close() }

  def writeToFile(fileName:String, data:String) =
    using (new FileWriter(fileName)) {
      fileWriter => fileWriter.write(data)
    }

  lazy val initCommand =
    Command.command("init") { (state: State) =>
      new File("lib").mkdir()
      new File("project").mkdir()
      new File("src/main/resources").mkdirs()
      new File("src/main/scala").mkdirs()
      new File("src/test/resources").mkdirs()
      new File("src/test/scala").mkdirs()
      writeToFile("build.sbt", "name := \"hello\"\n\nversion := \"1.0\"\n\nscalaVersion := \"2.9.2\"")
      writeToFile(".gitignore", "bin/\ntarget/")
      state
    }
}