Ruby syntax validity checker (JRuby) Javascript syntax validity checker. (Rhino)

build.sbt

libraryDependencies += "org.jruby" % "jruby" % "1.7.2"

libraryDependencies += "org.mozilla" % "rhino" % "1.7R4"

lint.scala

import org.jruby.util._
import java.io.File
import org.mozilla.javascript._

import org.jruby._
 

/** A wrapper around file, allowing iteration either on direct children 
     or on directory tree */
class RichFile(file: File) {
 
  def children = new Iterable[File] {
    def iterator = if (file.isDirectory) file.listFiles.iterator else Iterator.empty
  }
 
  def andTree : Iterable[File] = 
    Seq(file) ++ children.flatMap(child => new RichFile(child).andTree)
}
 
/** implicitely enrich java.io.File with methods of RichFile */
object RichFile {
  implicit def toRichFile(file: File) = new RichFile(file)
}

object Linter { 
  
  def main(args: Array[String]) = {
    import RichFile._


    val root = new File("/home/oct/code/project")
    // filtering comes for free
    val r = Ruby.getDefaultInstance
    
    for(f <- root.andTree) {
      if(f.getName.endsWith(".rb")) {
        val source = scala.io.Source.fromFile(f)
        val lines = source.mkString
        source.close ()
        try {
          val rootNode = r.parse(lines,f.getName,r.getCurrentContext.getCurrentScope,0, false)
        } catch { 
          case exception: exceptions.RaiseException => {
            Console.println("Syntax error in "+f)
            Console.println(exception)
          }
        }
      } else if(f.getName.endsWith(".js")) {
        val source = scala.io.Source.fromFile(f)
        val lines = source.mkString
        source.close ()
        val js_parser = new Parser()
        try {
          js_parser.parse(lines, f.getName, 0)
        } catch {
          case exception: EvaluatorException => {
            Console.println("Syntax error in "+f)
            Console.println(exception)
          }
        }
      }
    }
  }
}