new wdl4s dependency

build.sbt

@@ -34,7 +34,7 @@ resolvers ++= Seq(
 )
 
 libraryDependencies ++= Seq(
-  "org.broadinstitute" %% "wdl4s" % "0.8",
+  "org.broadinstitute" %% "wdl4s" % "0.10-ae6c153-SNAP",
   //---------- Test libraries -------------------//
   "org.scalatest" %% "scalatest" % "2.2.5" % Test
 )

src/main/scala/wdltool/GraphPrint.scala

@@ -10,7 +10,8 @@ object GraphPrint {
   case class WorkflowDigraph(workflowName: String, digraph: Set[String])
 
   def generateWorkflowDigraph(file: String, allNodesMode: Boolean): WorkflowDigraph = {
-    val namespace = WdlNamespaceWithWorkflow.load(Files.readAllLines(Paths.get(file)).asScala.mkString(System.lineSeparator()), Seq(WdlNamespace.fileResolver _))
+    // It's ok to use .get here, we're happy to throw an exception and crash the program!
+    val namespace = WdlNamespaceWithWorkflow.load(Files.readAllLines(Paths.get(file)).asScala.mkString(System.lineSeparator()), Seq(WdlNamespace.fileResolver _)).get
 
     val digraph = if (allNodesMode) {
       listAllGraphNodes(namespace)

src/main/scala/wdltool/Main.scala

@@ -94,7 +94,7 @@ object Main extends App {
   private[this] def continueIf(valid: => Boolean)(block: => Termination): Termination = if (valid) block else BadUsageTermination
 
   private[this] def loadWdl(path: String)(f: WdlNamespace => Termination): Termination = {
-    Try(WdlNamespace.loadUsingPath(Paths.get(path), None, None)) match {
+    WdlNamespace.loadUsingPath(Paths.get(path), None, None) match {
       case Success(namespace) => f(namespace)
       case Failure(t) => UnsuccessfulTermination(t.getMessage)
     }