Broken attempt so far: in ignoreMissingUpdate, don't download jar files, fixes #130

Author: jrudolph

src/main/scala-sbt-0.13/sbt/dependencygraph/DependencyGraphSbtCompat.scala

@@ -11,5 +11,10 @@ object DependencyGraphSbtCompat {
       def withMissingOk(missingOk: Boolean): UpdateConfiguration =
         updateConfig.copy(missingOk = missingOk)
     }
+
+    implicit class RichInlineConfiguration(val i: InlineConfiguration) extends AnyVal {
+      def withDependencies(newDependencies: Vector[ModuleID]): InlineConfiguration =
+        i.copy(dependencies = newDependencies)
+    }
   }
 }

src/main/scala/net/virtualvoid/sbt/graph/DependencyGraphKeys.scala

@@ -95,7 +95,6 @@ trait DependencyGraphKeys {
   val ivyReport = TaskKey[File](
     "ivy-report",
     "A task which returns the location of the ivy report file for a given configuration (default `compile`).")
-  val ignoreMissingUpdate = Keys.update in ivyReport
   val filterScalaLibrary = SettingKey[Boolean](
     "filter-scala-library",
     "Specifies if scala dependency should be filtered in dependency-* output")
@@ -104,6 +103,7 @@ trait DependencyGraphKeys {
     "dependency-license-info",
     "Aggregates and shows information about the licenses of dependencies")
 
+  val ignoreMissingUpdate = TaskKey[UpdateReport]("dependencyUpdate", "Specialized update task for sbt-dependency-graph")
   // internal
   private[graph] val moduleGraphStore = TaskKey[ModuleGraph]("module-graph-store", "The stored module-graph from the last run")
   val whatDependsOn = InputKey[String]("what-depends-on", "Shows information about what depends on the given module")

src/main/scala/net/virtualvoid/sbt/graph/DependencyGraphSettings.scala

@@ -37,8 +37,18 @@ object DependencyGraphSettings {
 
   def baseSettings = Seq(
     ivyReportFunction := ivyReportFunctionTask.value,
-    updateConfiguration in ignoreMissingUpdate := updateConfiguration.value.withMissingOk(true),
 
+    // create our own version of `update` that will
+    //  * not fail on missing artifacts
+    //  * not actually download any jar files but only poms
+    updateConfiguration in ignoreMissingUpdate := updateConfiguration.value.withMissingOk(true),
+    moduleSettings in ignoreMissingUpdate := {
+      moduleSettings.value match {
+        case i: InlineConfiguration ⇒ i.withDependencies(i.dependencies.map(_.pomOnly()).toVector)
+        case x                      ⇒ x
+      }
+    },
+    ivyModule in ignoreMissingUpdate := { val is = ivySbt.value; new is.Module((moduleSettings in ignoreMissingUpdate).value) },
     ignoreMissingUpdate :=
       // inTask will make sure the new definition will pick up `updateConfiguration in ignoreMissingUpdate`
       SbtAccess.inTask(ignoreMissingUpdate, Classpaths.updateTask).value,