javadoc-sbtを使う方法

https://github.com/bartschuller/javadoc-sbt を使う方法

build.sbtのかわりに…

  lazy val scalastudy = Project(
    id = "scalastudy",
    base = file("."),
    settings = Project.defaultSettings ++ javadoc.JavadocPlugin.javadocSettings ++ Seq(
      name := "hogefuga",
      organization := "jp.example.exex",
      version := "0.1-SNAPSHOT",
      scalaVersion := "2.9.1",
      javadoc.JavadocPlugin.JavadocKeys.javadocOptions := Seq("-encoding", "UTF-8", "-charset", "UTF-8")
      // add other settings here
    )
  )

javadoc.JavadocPlugin.javadocSettingsを追加する。
javadocコマンドを実行する際のオプションはjavadoc.JavadocPlugin.JavadocKeys.javadocOptions := Seq("-encoding", "UTF-8", "-charset", "UTF-8")のようにして指定可能（もっと良い書き方あるのかも。教えて＞＜）