Add compatibility shim to strip directories from mappings

Author: BillyAutrey

src/main/scala-2.12/com/typesafe/sbt/PluginCompat.scala

@@ -2,6 +2,7 @@ package com.typesafe.sbt
 
 import sbt.*
 import sbt.Keys.Classpath
+import com.typesafe.sbt.web.PathMapping
 import xsbti.FileConverter
 
 import java.nio.file.{ Path => NioPath }
@@ -28,4 +29,5 @@ private[sbt] object PluginCompat {
   def toFileRef(f: File)(implicit conv: FileConverter): FileRef = f
   def selectFirstPredicate: Seq[FileRef] => Boolean = files =>
     files.forall(_.isFile) && files.map(_.hashString).distinct.size == 1
+  def fileRefCompatible(path: PathMapping)(implicit conv: FileConverter): Boolean = true
 }

src/main/scala-3/com/typesafe/sbt/PluginCompat.scala

@@ -5,6 +5,7 @@ import java.io.{ File => IoFile }
 import sbt.*
 import sbt.Keys.Classpath
 import xsbti.{ FileConverter, HashedVirtualFileRef, VirtualFileRef }
+import com.typesafe.sbt.web.PathMapping
 
 private[sbt] object PluginCompat:
   type FileRef = HashedVirtualFileRef
@@ -30,4 +31,6 @@ private[sbt] object PluginCompat:
     conv.toVirtualFile(file.toPath)
   inline def selectFirstPredicate(using conv: FileConverter): Seq[FileRef] => Boolean = files =>
     files.forall(toFile(_).isFile) && files.map(_.contentHashStr).distinct.size == 1
+  inline def fileRefCompatible(path: PathMapping)(using conv: FileConverter): Boolean =
+    !toFile(path._1).isDirectory
 end PluginCompat

src/main/scala/com/typesafe/sbt/web/SbtWeb.scala

@@ -402,10 +402,11 @@ object SbtWeb extends AutoPlugin {
    * Create package mappings for assets in the webjar format. Use the webjars path prefix and exclude all web module
    * assets.
    */
-  def createWebJarMappings: Def.Initialize[Task[Seq[(FileRef, String)]]] = Def.task {
+  def createWebJarMappings: Def.Initialize[Task[Seq[PathMapping]]] = Def.task {
     def webModule(file: File) = webModuleDirectories.value.exists(dir => IO.relativize(dir, file).isDefined)
     implicit val fc: FileConverter = fileConverter.value
     mappings.value flatMap {
+      case mapping if !fileRefCompatible(mapping)  => None
       case (file, path) if webModule(toFile(file)) => None
       case (file, path)                            => Some(file -> (webJarsPathPrefix.value + path))
     }
@@ -450,10 +451,12 @@ object SbtWeb extends AutoPlugin {
   /**
    * Create package mappings for all assets, adding the optional prefix.
    */
-  def packageAssetsMappings: Def.Initialize[Task[Seq[(FileRef, String)]]] = Def.task {
+  def packageAssetsMappings: Def.Initialize[Task[Seq[PathMapping]]] = Def.task {
+    implicit val fc: FileConverter = fileConverter.value
     val prefix = packagePrefix.value
-    (Defaults.ConfigGlobal / pipeline).value map { case (file, path) =>
-      file -> (prefix + path)
+    (Defaults.ConfigGlobal / pipeline).value collect {
+      case (file, path) if fileRefCompatible((file, path)) =>
+        file -> (prefix + path)
     }
   }