Use Exec in State

main-command/src/main/contraband-scala/sbt/CommandSource.scala

@@ -0,0 +1,32 @@
+/**
+ * This code is generated using sbt-datatype.
+ */
+
+// DO NOT EDIT MANUALLY
+package sbt
+final class CommandSource private (
+  val channelName: String) extends Serializable {
+  
+  
+  
+  override def equals(o: Any): Boolean = o match {
+    case x: CommandSource => (this.channelName == x.channelName)
+    case _ => false
+  }
+  override def hashCode: Int = {
+    37 * (17 + channelName.##)
+  }
+  override def toString: String = {
+    "CommandSource(" + channelName + ")"
+  }
+  protected[this] def copy(channelName: String = channelName): CommandSource = {
+    new CommandSource(channelName)
+  }
+  def withChannelName(channelName: String): CommandSource = {
+    copy(channelName = channelName)
+  }
+}
+object CommandSource {
+  
+  def apply(channelName: String): CommandSource = new CommandSource(channelName)
+}

main-command/src/main/contraband-scala/sbt/Exec.scala

@@ -0,0 +1,40 @@
+/**
+ * This code is generated using sbt-datatype.
+ */
+
+// DO NOT EDIT MANUALLY
+package sbt
+final class Exec private (
+  val commandLine: String,
+  val source: Option[sbt.CommandSource]) extends Serializable {
+  
+  
+  
+  override def equals(o: Any): Boolean = o match {
+    case x: Exec => (this.commandLine == x.commandLine) && (this.source == x.source)
+    case _ => false
+  }
+  override def hashCode: Int = {
+    37 * (37 * (17 + commandLine.##) + source.##)
+  }
+  override def toString: String = {
+    "Exec(" + commandLine + ", " + source + ")"
+  }
+  protected[this] def copy(commandLine: String = commandLine, source: Option[sbt.CommandSource] = source): Exec = {
+    new Exec(commandLine, source)
+  }
+  def withCommandLine(commandLine: String): Exec = {
+    copy(commandLine = commandLine)
+  }
+  def withSource(source: Option[sbt.CommandSource]): Exec = {
+    copy(source = source)
+  }
+  def withSource(source: sbt.CommandSource): Exec = {
+    copy(source = Option(source))
+  }
+}
+object Exec {
+  
+  def apply(commandLine: String, source: Option[sbt.CommandSource]): Exec = new Exec(commandLine, source)
+  def apply(commandLine: String, source: sbt.CommandSource): Exec = new Exec(commandLine, Option(source))
+}

main-command/src/main/contraband/state.contra

@@ -0,0 +1,11 @@
+package sbt
+@target(Scala)
+
+type Exec {
+  commandLine: String!
+  source: sbt.CommandSource
+}
+
+type CommandSource {
+  channelName: String!
+}

main-command/src/main/scala/sbt/BasicCommands.scala

@@ -6,7 +6,7 @@ import sbt.internal.util.complete.{ Completion, Completions, DefaultParsers, His
 import sbt.internal.util.Types.{ const, idFun }
 import sbt.internal.inc.classpath.ClasspathUtilities.toLoader
 import sbt.internal.inc.ModuleUtilities
-import sbt.internal.{ Exec, ConsolePromptEvent, ConsoleUnpromptEvent }
+import sbt.internal.{ ConsolePromptEvent, ConsoleUnpromptEvent }
 import sbt.internal.client.NetworkClient
 import DefaultParsers._
 import Function.tupled
@@ -82,13 +82,13 @@ object BasicCommands {
     state
   }
 
-  def multiParser(s: State): Parser[Seq[String]] =
+  def multiParser(s: State): Parser[List[String]] =
     {
       val nonSemi = token(charClass(_ != ';').+, hide = const(true))
-      (token(';' ~> OptSpace) flatMap { _ => matched((s.combinedParser & nonSemi) | nonSemi) <~ token(OptSpace) } map (_.trim)).+
+      (token(';' ~> OptSpace) flatMap { _ => matched((s.combinedParser & nonSemi) | nonSemi) <~ token(OptSpace) } map (_.trim)).+ map { _.toList }
     }
 
-  def multiApplied(s: State) =
+  def multiApplied(s: State): Parser[() => State] =
     Command.applyEffect(multiParser(s))(_ ::: s)
 
   def multi = Command.custom(multiApplied, Help(Multi, MultiBrief, MultiDetailed))
@@ -101,11 +101,11 @@ object BasicCommands {
     if (s.remainingCommands.isEmpty) arg :: s else s
   }
   def append = Command(AppendCommand, Help.more(AppendCommand, AppendLastDetailed))(otherCommandParser) { (s, arg) =>
-    s.copy(remainingCommands = s.remainingCommands :+ arg)
+    s.copy(remainingCommands = s.remainingCommands :+ Exec(arg, s.source))
   }
 
   def setOnFailure = Command(OnFailure, Help.more(OnFailure, OnFailureDetailed))(otherCommandParser) { (s, arg) =>
-    s.copy(onFailure = Some(arg))
+    s.copy(onFailure = Some(Exec(arg, s.source)))
   }
   private[sbt] def compatCommands = Seq(
     Command.command(Compat.ClearOnFailure) { s =>
@@ -114,7 +114,7 @@ object BasicCommands {
     },
     Command.arb(s => token(Compat.OnFailure, hide = const(true)).flatMap(x => otherCommandParser(s))) { (s, arg) =>
       s.log.warn(Compat.OnFailureDeprecated)
-      s.copy(onFailure = Some(arg))
+      s.copy(onFailure = Some(Exec(arg, s.source)))
     },
     Command.command(Compat.FailureWall) { s =>
       s.log.warn(Compat.FailureWallDeprecated)
@@ -187,7 +187,7 @@ object BasicCommands {
     val line = reader.readLine(prompt)
     line match {
       case Some(line) =>
-        val newState = s.copy(onFailure = Some(Shell), remainingCommands = line +: Shell +: s.remainingCommands).setInteractive(true)
+        val newState = s.copy(onFailure = Some(Exec(Shell, None)), remainingCommands = Exec(line, s.source) +: Exec(Shell, None) +: s.remainingCommands).setInteractive(true)
         if (line.trim.isEmpty) newState else newState.clearGlobalLog
       case None => s.setInteractive(false)
     }
@@ -197,9 +197,11 @@ object BasicCommands {
     val exchange = State.exchange
     val s1 = exchange.run(s0)
     exchange.publishEvent(ConsolePromptEvent(s0))
-    val Exec(line, source) = exchange.blockUntilNextExec
+    val exec: Exec = exchange.blockUntilNextExec
+    val line = exec.commandLine
+    val source = exec.source
     println(s"server (line, source): ($line, $source)")
-    val newState = s1.copy(onFailure = Some(Server), remainingCommands = line +: Server +: s1.remainingCommands).setInteractive(true)
+    val newState = s1.copy(onFailure = Some(Exec(Server, None)), remainingCommands = Exec(line, source) +: Exec(Server, None) +: s1.remainingCommands).setInteractive(true)
     exchange.publishEvent(ConsoleUnpromptEvent(source))
     if (line.trim.isEmpty) newState
     else newState.clearGlobalLog
@@ -212,8 +214,8 @@ object BasicCommands {
       applyEffect(p)({ inputArg =>
         val arguments = inputArg.toList ++
           (s0.remainingCommands.toList match {
-            case "shell" :: Nil => Nil
-            case xs             => xs
+            case e :: Nil if e.commandLine == "shell" :: Nil => Nil
+            case xs                                          => xs map { _.commandLine }
           })
         NetworkClient.run(arguments)
         "exit" :: s0.copy(remainingCommands = Nil)
@@ -233,7 +235,7 @@ object BasicCommands {
         val port = math.abs(portAndSuccess)
         val previousSuccess = portAndSuccess >= 0
         readMessage(port, previousSuccess) match {
-          case Some(message) => (message :: (ReadCommand + " " + port) :: s).copy(onFailure = Some(ReadCommand + " " + (-port)))
+          case Some(message) => (message :: (ReadCommand + " " + port) :: s).copy(onFailure = Some(Exec(ReadCommand + " " + (-port), s.source)))
           case None =>
             System.err.println("Connection closed.")
             s.fail
@@ -241,7 +243,7 @@ object BasicCommands {
       case Right(from) =>
         val notFound = notReadable(from)
         if (notFound.isEmpty)
-          readLines(from) ::: s // this means that all commands from all files are loaded, parsed, and inserted before any are executed
+          readLines(from).toList ::: s // this means that all commands from all files are loaded, parsed, and inserted before any are executed
         else {
           s.log.error("Command file(s) not readable: \n\t" + notFound.mkString("\n\t"))
           s

main-command/src/main/scala/sbt/BasicKeys.scala

@@ -11,6 +11,6 @@ object BasicKeys {
   val serverPort = AttributeKey[Int]("server-port", "The port number used by server command.", 10000)
   private[sbt] val interactive = AttributeKey[Boolean]("interactive", "True if commands are currently being entered from an interactive environment.", 10)
   private[sbt] val classLoaderCache = AttributeKey[ClassLoaderCache]("class-loader-cache", "Caches class loaders based on the classpath entries and last modified times.", 10)
-  private[sbt] val OnFailureStack = AttributeKey[List[Option[String]]]("on-failure-stack", "Stack that remembers on-failure handlers.", 10)
+  private[sbt] val OnFailureStack = AttributeKey[List[Option[Exec]]]("on-failure-stack", "Stack that remembers on-failure handlers.", 10)
   private[sbt] val explicitGlobalLogLevels = AttributeKey[Boolean]("explicit-global-log-levels", "True if the global logging levels were explicitly set by the user.", 10)
 }

main-command/src/main/scala/sbt/Command.scala

@@ -89,16 +89,16 @@ object Command {
     }
 
   /** This is the main function State transfer function of the sbt command processing, called by MainLoop.next, */
-  def process(command: String, state: State): State =
+  def process(command: Exec, state: State): State =
     {
       val parser = combine(state.definedCommands)
-      val newState = parse(command, parser(state)) match {
+      val newState = parse(command.commandLine, parser(state)) match {
         case Right(s) => s() // apply command.  command side effects happen here
         case Left(errMsg) =>
           state.log.error(errMsg)
           state.fail
       }
-      State.exchange.publishEvent(ExecStatusEvent("Ready", newState.remainingCommands.toVector))
+      State.exchange.publishEvent(ExecStatusEvent("Ready", newState.remainingCommands.toVector map { _.commandLine }))
       newState
     }
   def invalidValue(label: String, allowed: Iterable[String])(value: String): String =

main-command/src/main/scala/sbt/State.scala

@@ -27,11 +27,12 @@ final case class State(
     configuration: xsbti.AppConfiguration,
     definedCommands: Seq[Command],
     exitHooks: Set[ExitHook],
-    onFailure: Option[String],
-    remainingCommands: Seq[String],
+    onFailure: Option[Exec],
+    remainingCommands: List[Exec],
     history: State.History,
     attributes: AttributeMap,
     globalLogging: GlobalLogging,
+    source: Option[CommandSource],
     next: State.Next
 ) extends Identity {
   lazy val combinedParser = Command.combine(definedCommands)(this)
@@ -45,14 +46,20 @@ trait Identity {
 
 /** Convenience methods for State transformations and operations. */
 trait StateOps {
-  def process(f: (String, State) => State): State
+  def process(f: (Exec, State) => State): State
 
   /** Schedules `commands` to be run before any remaining commands.*/
-  def :::(commands: Seq[String]): State
+  def :::(newCommands: List[String]): State
+
+  /** Schedules `commands` to be run before any remaining commands.*/
+  def ++:(newCommands: List[Exec]): State
 
   /** Schedules `command` to be run before any remaining commands.*/
   def ::(command: String): State
 
+  /** Schedules `command` to be run before any remaining commands.*/
+  def +:(command: Exec): State
+
   /** Sets the next command processing action to be to continue processing the next command.*/
   def continue: State
 
@@ -69,6 +76,9 @@ trait StateOps {
   /** Sets the next command processing action to do.*/
   def setNext(n: State.Next): State
 
+  /** Sets the current command source channel.*/
+  def setSource(source: CommandSource): State
+
   @deprecated("Use setNext", "0.11.0") def setResult(ro: Option[xsbti.MainResult]): State
 
   /**
@@ -158,9 +168,9 @@ object State {
    * @param executed the list of the most recently executed commands, with the most recent command first.
    * @param maxSize the maximum number of commands to keep, or 0 to keep an unlimited number.
    */
-  final class History private[State] (val executed: Seq[String], val maxSize: Int) {
+  final class History private[State] (val executed: Seq[Exec], val maxSize: Int) {
     /** Adds `command` as the most recently executed command.*/
-    def ::(command: String): History =
+    def ::(command: Exec): History =
       {
         val prependTo = if (maxSize > 0 && executed.size >= maxSize) executed.take(maxSize - 1) else executed
         new History(command +: prependTo, maxSize)
@@ -168,8 +178,8 @@ object State {
     /** Changes the maximum number of commands kept, adjusting the current history if necessary.*/
     def setMaxSize(size: Int): History =
       new History(if (size <= 0) executed else executed.take(size), size)
-    def currentOption: Option[String] = executed.headOption
-    def previous: Option[String] = executed.drop(1).headOption
+    def currentOption: Option[Exec] = executed.headOption
+    def previous: Option[Exec] = executed.drop(1).headOption
   }
   /** Constructs an empty command History with a default, finite command limit.*/
   def newHistory = new History(Vector.empty, HistoryCommands.MaxLines)
@@ -177,29 +187,37 @@ object State {
   def defaultReload(state: State): Reboot =
     {
       val app = state.configuration.provider
-      new Reboot(app.scalaProvider.version, state.remainingCommands, app.id, state.configuration.baseDirectory)
+      new Reboot(
+        app.scalaProvider.version,
+        state.remainingCommands map { case e: Exec => e.commandLine },
+        app.id, state.configuration.baseDirectory
+      )
     }
 
   private[sbt] lazy val exchange = new CommandExchange()
 
   /** Provides operations and transformations on State. */
   implicit def stateOps(s: State): StateOps = new StateOps {
-    def process(f: (String, State) => State): State =
+    def process(f: (Exec, State) => State): State =
       s.remainingCommands match {
-        case Seq() => exit(true)
-        case Seq(x, xs @ _*) =>
+        case List() => exit(true)
+        case x :: xs =>
           log.debug(s"> $x")
           f(x, s.copy(remainingCommands = xs, history = x :: s.history))
       }
-    def :::(newCommands: Seq[String]): State = s.copy(remainingCommands = newCommands ++ s.remainingCommands)
-    def ::(command: String): State = (command :: Nil) ::: this
+
+    def :::(newCommands: List[String]): State = ++:(newCommands map { Exec(_, s.source) })
+    def ++:(newCommands: List[Exec]): State = s.copy(remainingCommands = newCommands ::: s.remainingCommands)
+    def ::(command: String): State = +:(Exec(command, s.source))
+    def +:(command: Exec): State = (command :: Nil) ++: this
     def ++(newCommands: Seq[Command]): State = s.copy(definedCommands = (s.definedCommands ++ newCommands).distinct)
     def +(newCommand: Command): State = this ++ (newCommand :: Nil)
     def baseDir: File = s.configuration.baseDirectory
     def setNext(n: Next) = s.copy(next = n)
+    def setSource(x: CommandSource): State = s.copy(source = Some(x))
     def setResult(ro: Option[xsbti.MainResult]) = ro match { case None => continue; case Some(r) => setNext(new Return(r)) }
     def continue = setNext(Continue)
-    def reboot(full: Boolean) = { runExitHooks(); throw new xsbti.FullReload(s.remainingCommands.toArray, full) }
+    def reboot(full: Boolean) = { runExitHooks(); throw new xsbti.FullReload((s.remainingCommands map { case e: Exec => e.commandLine }).toArray, full) }
     def reload = runExitHooks().setNext(new Return(defaultReload(s)))
     def clearGlobalLog = setNext(ClearGlobalLog)
     def keepLastLog = setNext(KeepLastLog)
@@ -220,7 +238,7 @@ object State {
         else
           applyOnFailure(s, remaining, s.copy(remainingCommands = remaining))
       }
-    private[this] def applyOnFailure(s: State, remaining: Seq[String], noHandler: => State): State =
+    private[this] def applyOnFailure(s: State, remaining: List[Exec], noHandler: => State): State =
       s.onFailure match {
         case Some(c) => s.copy(remainingCommands = c +: remaining, onFailure = None)
         case None    => noHandler

main-command/src/main/scala/sbt/internal/CommandChannel.scala

@@ -18,11 +18,12 @@ abstract class CommandChannel {
   def publishEvent(event: EventMessage): Unit
   def publishBytes(bytes: Array[Byte]): Unit
   def shutdown(): Unit
+  def name: String
 }
 
-case class Exec(commandLine: String, source: Option[CommandSource])
+// case class Exec(commandLine: String, source: Option[CommandSource])
 
-case class CommandSource(channelName: String)
+// case class CommandSource(channelName: String)
 
 /*
  * This is a data passed specifically for local prompting console.

main-command/src/main/scala/sbt/internal/CommandExchange.scala

@@ -5,7 +5,7 @@ import java.net.SocketException
 import java.util.concurrent.ConcurrentLinkedQueue
 import java.util.concurrent.atomic.AtomicInteger
 import sbt.internal.server._
-import sbt.protocol.{ EventMessage, Serialization }
+import sbt.protocol.{ EventMessage, Serialization, ChannelAcceptedEvent }
 import scala.collection.mutable.ListBuffer
 import scala.annotation.tailrec
 import BasicKeys.serverPort
@@ -74,6 +74,7 @@ private[sbt] final class CommandExchange {
           s.log.info(s"new client connected from: ${socket.getPort}")
           val channel = new NetworkChannel(newChannelName, socket)
           subscribe(channel)
+          channel.publishEvent(ChannelAcceptedEvent(channel.name))
         }
       server match {
         case Some(x) => // do nothing

main-command/src/main/scala/sbt/internal/ConsoleChannel.scala

@@ -6,7 +6,7 @@ import BasicKeys._
 import java.io.File
 import sbt.protocol.EventMessage
 
-private[sbt] final class ConsoleChannel(name: String) extends CommandChannel {
+private[sbt] final class ConsoleChannel(val name: String) extends CommandChannel {
   private var askUserThread: Option[Thread] = None
   def makeAskUserThread(s: State): Thread = new Thread("ask-user-thread") {
     val history = (s get historyPath) getOrElse Some(new File(s.baseDir, ".history"))

main-command/src/main/scala/sbt/internal/client/NetworkClient.scala

@@ -11,7 +11,8 @@ import sbt.protocol._
 import sbt.internal.util.JLine
 import java.util.concurrent.atomic.{ AtomicBoolean, AtomicReference }
 
-class NetworkClient(arguments: List[String]) {
+class NetworkClient(arguments: List[String]) { self =>
+  private val channelName = new AtomicReference("_")
   private val status = new AtomicReference("Ready")
   private val lock: AnyRef = new AnyRef {}
   private val running = new AtomicBoolean(true)
@@ -38,15 +39,7 @@ class NetworkClient(arguments: List[String]) {
     println(s"client on port $port")
     val socket = new Socket(InetAddress.getByName(host), port)
     new ServerConnection(socket) {
-      override def onEvent(event: EventMessage): Unit =
-        event match {
-          case e: ExecStatusEvent =>
-            lock.synchronized {
-              status.set(e.status)
-            }
-            println(event)
-          case e => println(e.toString)
-        }
+      override def onEvent(event: EventMessage): Unit = self.onEvent(event)
       override def onShutdown(): Unit =
         {
           running.set(false)
@@ -54,6 +47,17 @@ class NetworkClient(arguments: List[String]) {
     }
   }
 
+  def onEvent(event: EventMessage): Unit =
+    event match {
+      case e: ChannelAcceptedEvent =>
+        channelName.set(e.channelName)
+        println(event)
+      case e: ExecStatusEvent =>
+        status.set(e.status)
+        println(event)
+      case e => println(e.toString)
+    }
+
   def start(): Unit =
     {
       val reader = JLine.simple(None, JLine.HandleCONT, injectThreadSleep = true)

main-command/src/main/scala/sbt/internal/server/NetworkChannel.scala

@@ -9,7 +9,7 @@ import java.net.{ Socket, SocketTimeoutException }
 import java.util.concurrent.atomic.AtomicBoolean
 import sbt.protocol.{ Serialization, CommandMessage, ExecCommand, EventMessage }
 
-final class NetworkChannel(name: String, connection: Socket) extends CommandChannel {
+final class NetworkChannel(val name: String, connection: Socket) extends CommandChannel {
   private val running = new AtomicBoolean(true)
   private val delimiter: Byte = '\n'.toByte
   private val out = connection.getOutputStream
@@ -50,7 +50,11 @@ final class NetworkChannel(name: String, connection: Socket) extends CommandChan
   }
   thread.start()
 
-  def publishEvent(event: EventMessage): Unit = ()
+  def publishEvent(event: EventMessage): Unit =
+    {
+      val bytes = Serialization.serializeEvent(event)
+      publishBytes(bytes)
+    }
 
   def publishBytes(event: Array[Byte]): Unit =
     {

main/src/main/scala/sbt/Cross.scala

@@ -137,7 +137,7 @@ object Cross {
           Seq(s"$SwitchCommand $verbose $version", projects.map(_ + "/" + aggCommand).mkString("all ", " ", ""))
       }
 
-      allCommands ::: CrossRestoreSessionCommand :: captureCurrentSession(state, x)
+      allCommands.toList ::: CrossRestoreSessionCommand :: captureCurrentSession(state, x)
     }
   }
 
@@ -169,7 +169,7 @@ object Cross {
   private def switchCommandImpl(state: State, args: Switch): State = {
     val switchedState = switchScalaVersion(args, state)
 
-    args.command.toSeq ::: switchedState
+    args.command.toList ::: switchedState
   }
 
   private def switchScalaVersion(switch: Switch, state: State): State = {

main/src/main/scala/sbt/Main.scala

@@ -94,9 +94,9 @@ object StandardMain {
       import BasicCommandStrings.isEarlyCommand
       val userCommands = configuration.arguments.map(_.trim)
       val (earlyCommands, normalCommands) = (preCommands ++ userCommands).partition(isEarlyCommand)
-      val commands = earlyCommands ++ normalCommands
+      val commands = (earlyCommands ++ normalCommands).toList map { x => Exec(x, None) }
       val initAttrs = BuiltinCommands.initialAttributes
-      val s = State(configuration, initialDefinitions, Set.empty, None, commands, State.newHistory, initAttrs, initialGlobalLogging, State.Continue)
+      val s = State(configuration, initialDefinitions, Set.empty, None, commands, State.newHistory, initAttrs, initialGlobalLogging, None, State.Continue)
       s.initializeClassLoaderCache
     }
 }
@@ -129,7 +129,7 @@ object BuiltinCommands {
   // This parser schedules the default boot commands unless overridden by an alias
   def bootParser(s: State) =
     {
-      val orElse = () => DefaultBootCommands ::: s
+      val orElse = () => DefaultBootCommands.toList ::: s
       delegateToAlias(BootCommand, success(orElse))(s)
     }
 
@@ -242,7 +242,7 @@ object BuiltinCommands {
   }
 
   def initialize = Command.command(InitCommand) { s =>
-    /*"load-commands -base ~/.sbt/commands" :: */ readLines(readable(sbtRCs(s))) ::: s
+    /*"load-commands -base ~/.sbt/commands" :: */ readLines(readable(sbtRCs(s))).toList ::: s
   }
 
   def eval = Command.single(EvalCommand, Help.more(EvalCommand, evalDetailed)) { (s, arg) =>

main/src/main/scala/sbt/internal/IvyConsole.scala

@@ -20,7 +20,7 @@ object IvyConsole {
   final val Name = "ivy-console"
   lazy val command =
     Command.command(Name) { state =>
-      val Dependencies(managed, repos, unmanaged) = parseDependencies(state.remainingCommands, state.log)
+      val Dependencies(managed, repos, unmanaged) = parseDependencies(state.remainingCommands map { _.commandLine }, state.log)
       val base = new File(CommandUtil.bootDirectory(state), Name)
       IO.createDirectory(base)
 
@@ -39,7 +39,7 @@ object IvyConsole {
       val append = Load.transformSettings(Load.projectScope(currentRef), currentRef.build, rootProject, depSettings)
 
       val newStructure = Load.reapply(session.original ++ append, structure)
-      val newState = state.copy(remainingCommands = "console-quick" :: Nil)
+      val newState = state.copy(remainingCommands = Exec("console-quick", None) :: Nil)
       Project.setProject(session, newStructure, newState)
     }
 

main/src/main/scala/sbt/internal/Script.scala

@@ -19,7 +19,7 @@ object Script {
   final val Name = "script"
   lazy val command =
     Command.command(Name) { state =>
-      val scriptArg = state.remainingCommands.headOption getOrElse sys.error("No script file specified")
+      val scriptArg = state.remainingCommands.headOption map { _.commandLine } getOrElse sys.error("No script file specified")
       val scriptFile = new File(scriptArg).getAbsoluteFile
       val hash = Hash.halve(Hash.toHex(Hash(scriptFile.getAbsolutePath)))
       val base = new File(CommandUtil.bootDirectory(state), hash)

protocol/src/main/contraband-scala/sbt/protocol/ChannelAcceptedEvent.scala

@@ -0,0 +1,32 @@
+/**
+ * This code is generated using sbt-datatype.
+ */
+
+// DO NOT EDIT MANUALLY
+package sbt.protocol
+final class ChannelAcceptedEvent private (
+  val channelName: String) extends sbt.protocol.EventMessage() with Serializable {
+  
+  
+  
+  override def equals(o: Any): Boolean = o match {
+    case x: ChannelAcceptedEvent => (this.channelName == x.channelName)
+    case _ => false
+  }
+  override def hashCode: Int = {
+    37 * (17 + channelName.##)
+  }
+  override def toString: String = {
+    "ChannelAcceptedEvent(" + channelName + ")"
+  }
+  protected[this] def copy(channelName: String = channelName): ChannelAcceptedEvent = {
+    new ChannelAcceptedEvent(channelName)
+  }
+  def withChannelName(channelName: String): ChannelAcceptedEvent = {
+    copy(channelName = channelName)
+  }
+}
+object ChannelAcceptedEvent {
+  
+  def apply(channelName: String): ChannelAcceptedEvent = new ChannelAcceptedEvent(channelName)
+}

protocol/src/main/contraband-scala/sbt/protocol/codec/ChannelAcceptedEventFormats.scala

@@ -0,0 +1,27 @@
+/**
+ * This code is generated using sbt-datatype.
+ */
+
+// DO NOT EDIT MANUALLY
+package sbt.protocol.codec
+import _root_.sjsonnew.{ deserializationError, serializationError, Builder, JsonFormat, Unbuilder }
+trait ChannelAcceptedEventFormats { self: sjsonnew.BasicJsonProtocol =>
+implicit lazy val ChannelAcceptedEventFormat: JsonFormat[sbt.protocol.ChannelAcceptedEvent] = new JsonFormat[sbt.protocol.ChannelAcceptedEvent] {
+  override def read[J](jsOpt: Option[J], unbuilder: Unbuilder[J]): sbt.protocol.ChannelAcceptedEvent = {
+    jsOpt match {
+      case Some(js) =>
+      unbuilder.beginObject(js)
+      val channelName = unbuilder.readField[String]("channelName")
+      unbuilder.endObject()
+      sbt.protocol.ChannelAcceptedEvent(channelName)
+      case None =>
+      deserializationError("Expected JsObject but found None")
+    }
+  }
+  override def write[J](obj: sbt.protocol.ChannelAcceptedEvent, builder: Builder[J]): Unit = {
+    builder.beginObject()
+    builder.addField("channelName", obj.channelName)
+    builder.endObject()
+  }
+}
+}

protocol/src/main/contraband-scala/sbt/protocol/codec/EventMessageFormats.scala

@@ -5,6 +5,6 @@
 // DO NOT EDIT MANUALLY
 package sbt.protocol.codec
 import _root_.sjsonnew.{ deserializationError, serializationError, Builder, JsonFormat, Unbuilder }
-trait EventMessageFormats { self: sjsonnew.BasicJsonProtocol with sbt.protocol.codec.LogEventFormats with sbt.protocol.codec.ExecStatusEventFormats =>
-implicit lazy val EventMessageFormat: JsonFormat[sbt.protocol.EventMessage] = flatUnionFormat2[sbt.protocol.EventMessage, sbt.protocol.LogEvent, sbt.protocol.ExecStatusEvent]("type")
+trait EventMessageFormats { self: sjsonnew.BasicJsonProtocol with sbt.protocol.codec.ChannelAcceptedEventFormats with sbt.protocol.codec.LogEventFormats with sbt.protocol.codec.ExecStatusEventFormats =>
+implicit lazy val EventMessageFormat: JsonFormat[sbt.protocol.EventMessage] = flatUnionFormat3[sbt.protocol.EventMessage, sbt.protocol.ChannelAcceptedEvent, sbt.protocol.LogEvent, sbt.protocol.ExecStatusEvent]("type")
 }

protocol/src/main/contraband-scala/sbt/protocol/codec/JsonProtocol.scala

@@ -4,5 +4,5 @@
 
 // DO NOT EDIT MANUALLY
 package sbt.protocol.codec
-trait JsonProtocol extends sjsonnew.BasicJsonProtocol with sbt.protocol.codec.ExecCommandFormats with sbt.protocol.codec.CommandMessageFormats with sbt.protocol.codec.LogEventFormats with sbt.protocol.codec.ExecStatusEventFormats with sbt.protocol.codec.EventMessageFormats
+trait JsonProtocol extends sjsonnew.BasicJsonProtocol with sbt.protocol.codec.ExecCommandFormats with sbt.protocol.codec.CommandMessageFormats with sbt.protocol.codec.ChannelAcceptedEventFormats with sbt.protocol.codec.LogEventFormats with sbt.protocol.codec.ExecStatusEventFormats with sbt.protocol.codec.EventMessageFormats
 object JsonProtocol extends JsonProtocol

protocol/src/main/contraband/server.contra

@@ -17,6 +17,10 @@ type ExecCommand implements CommandMessage {
 interface EventMessage {
 }
 
+type ChannelAcceptedEvent implements EventMessage {
+  channelName: String!
+}
+
 ## Log event.
 type LogEvent implements EventMessage {
   level: String!