Shell.scala

import java.io._
import java.net._
import scala.io._
import scala.xml._

object Shell {
  val sjis = "Shift_JIS"
  val utf8 = "UTF8"
  val jis = "jis"
  val eucjp = "EUC_JP" 
  
  implicit def toRichSource(src:Source) = new { 
    def read = src.getLines.foldLeft(""){(r, line) => r + line + "\n"} 
  }
  implicit def strAddtoURL(s:String) = new { def toURL = new URL(s) }
  implicit def regexAddmatchRegex(r:scala.util.matching.Regex) = new { def =~(s:String) = s.matches(r.toString)}
  implicit def strAddmatchRegex(s1:String) = new { 
    def =~(s2:String) = s2.matches(s1.toString)  
    def =~(r:scala.util.matching.Regex) = s1.matches(r.toString)
    def encode(charset:String) = new String(s1.getBytes("iso-8859-1"), charset)
  }
  def open(url:URL):Source = {      
    Source.fromURL( url )
  }
  
  implicit val path = "./"
  def ls(implicit path:String) = {
    val f = new File(path)
    
    if (f.isFile) List(f)
    else if(f.isDirectory) f.listFiles.toList
    else List()    
  }

  def exec(cmd:String)(implicit filter:(String) => String) = {
    val process = Runtime.getRuntime().exec(cmd)
    val in = process.getInputStream()
    val br = new BufferedReader(new InputStreamReader(in))
    
    val sw = new StringWriter()
    val pw = new PrintWriter(sw)
    var s = br.readLine
    while(s != null){
      pw.println( filter(s) )
      s = br.readLine
    }
    sw.toString
  }
  def main(args : Array[String]) : Unit = {
    println( exec("ls -l /"){ x => "\\\\  " + x.split(" ")(0) + "  //" } )
    println( exec("ls -l /") )
    
   // val xml = XML.loadString(html.encode(sjis).replaceAll("FIXED HREF","href").replaceAll("<!--.*",""))
    //val url = xml \\ "ref" \ "@href" text
  }
}