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/* NEST (New Scala Test)
* Copyright 2007-2011 LAMP/EPFL
* @author Paul Phillips
*/
package scala.tools
package cmd
package program
import nsc.io._
import scala.sys.process._
object Scmp {
private val scmpUsage = """
|Usage: scmp [options] <cmd line>
|Example: scmp --p1 '-no-specialization -Ydebug' scalac src/library/scala/Function1.scala
|
|Note: the command line must start with a path to scalac.
|""".stripMargin
private val scmpOptions = List(
"p1" -> "options for the first run only",
"p2" -> "options for the second run only"
)
private val scmpInfo = Simple.scalaProgramInfo("scmp", scmpUsage)
lazy val ScmpSpec = Simple(scmpInfo, Nil, scmpOptions, x => returning(x)(_.onlyKnownOptions = false))
def main(args0: Array[String]): Unit = {
if (args0.isEmpty)
return println(scmpUsage)
val runner = ScmpSpec instance args0
import runner._
val p1args = parsed.getOrElse("--p1", "")
val p2args = parsed.getOrElse("--p2", "")
if (p1args.isEmpty && p2args.isEmpty)
return println("At least one of --p1 and --p2 must be given.")
if (residualArgs.isEmpty)
return println("There is no command to run.")
def createCmd(extras: String) =
fromArgs(residualArgs.patch(1, toArgs(extras), 0))
def runCmd(cmd: String) = {
val tmpfile = File.makeTemp()
(cmd #> tmpfile.jfile !)
tmpfile
}
val cmds = List(p1args, p2args) map createCmd
println(cmds.mkString("Running command lines:\n ", "\n ", ""))
val files = cmds map runCmd map (_.path)
val diff = "diff %s %s".format(files: _*).!!
if (diff.isEmpty) println("No differences.")
else println(diff)
}
}
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