1 files changed, 30 insertions, 0 deletions
diff --git a/stage1/ClassPath.scala b/stage1/ClassPath.scala
new file mode 100644
index 0000000..66a1b44
--- /dev/null
+++ b/stage1/ClassPath.scala
@@ -0,0 +1,30 @@
+package cbt
+import java.io._
+import java.net._
+import scala.collection.immutable.Seq
+
+object ClassPath{
+  def apply(files: File*): ClassPath = ClassPath(files.toVector)
+  def flatten( classPaths: Seq[ClassPath] ): ClassPath = ClassPath( classPaths.map(_.files).flatten )
+}
+case class ClassPath(files: Seq[File]){
+  private val duplicates = (files diff files.distinct).distinct
+  assert(
+    duplicates.isEmpty,
+    "Duplicate classpath entries found:\n" ++ duplicates.mkString("\n") ++ "\nin classpath:\n"++string
+  )
+  private val nonExisting = files.distinct.filterNot(_.exists)
+  assert(
+    duplicates.isEmpty,
+    "Classpath contains entires that don't exist on disk:\n" ++ nonExisting.mkString("\n") ++ "\nin classpath:\n"++string
+  )
+  
+  def +:(file: File) = ClassPath(file +: files)
+  def :+(file: File) = ClassPath(files :+ file)
+  def ++(other: ClassPath) = ClassPath(files ++ other.files)
+  def string = strings.mkString( File.pathSeparator )
+  def strings = files.map{
+    f => f.string ++ ( if(f.isDirectory) "/" else "" )
+  }
+  def toConsole = string
+}