* Added execTask that runs a ProcessBuilder

* Added implicit from scala.xml.Elem to ProcessBuilder that uses the element's text as the command.  For example:
    <x> {command.absolutePath} -x {a.absolutePath} </x>
 * Added methods to PathFinder to get the results as Strings or Files



git-svn-id: https://simple-build-tool.googlecode.com/svn/trunk@839 d89573ee-9141-11dd-94d4-bdf5e562f29c

src/main/scala/sbt/Path.scala

@@ -264,6 +264,8 @@ sealed abstract class PathFinder extends NotNull
 		addTo(pathSet)
 		wrap.Wrappers.readOnly(pathSet)
 	}
+	final def getFiles: scala.collection.Set[File] = Set( get.map(_.asFile).toSeq : _*)
+	final def getPaths: scala.collection.Set[String] = Set( get.map(_.absolutePath).toSeq : _*)
 	private[sbt] def addTo(pathSet: Set[Path])
 }
 private class BasePathFinder(base: PathFinder) extends PathFinder

src/main/scala/sbt/Process.scala

@@ -17,6 +17,7 @@ object Process
 	implicit def apply(builder: JProcessBuilder): ProcessBuilder = new SimpleProcessBuilder(builder)
 	implicit def apply(file: File): FilePartialBuilder = new FileBuilder(file)
 	implicit def apply(url: URL): URLPartialBuilder = new URLBuilder(url)
+	implicit def apply(command: scala.xml.Elem): ProcessBuilder = apply(command.text)
 }
 
 trait URLPartialBuilder extends NotNull

src/main/scala/sbt/ScalaProject.scala

@@ -53,6 +53,15 @@ trait SimpleScalaProject extends Project
 				pathClean orElse restored
 			}
 		}
+	def execTask(command: => ProcessBuilder): Task =
+		task
+		{
+			val exitValue = command ! log
+			if(exitValue == 0)
+				None
+			else
+				Some("Nonzero exit value: " + exitValue)
+		}
 }
 trait ScalaProject extends SimpleScalaProject with FileTasks with MultiTaskProject
 {