Scope dependency unpacking with scala version

src/main/scala/com/github/sbt/avro/SbtAvro.scala

@@ -124,14 +124,17 @@ object SbtAvro extends AutoPlugin {
   override lazy val projectSettings: Seq[Setting[_]] = defaultSettings ++
     Seq(Compile, Test).flatMap(c => inConfig(c)(configScopedSettings))
 
-  private def unpack(deps: Seq[File],
-                     extractTarget: File,
-                     includeFilter: FileFilter,
-                     excludeFilter: FileFilter,
-                     streams: TaskStreams): Seq[File] = {
+  private def unpack(
+    cacheBaseDirectory: File,
+    deps: Seq[File],
+    extractTarget: File,
+    includeFilter: FileFilter,
+    excludeFilter: FileFilter,
+    streams: TaskStreams
+  ): Seq[File] = {
     def cachedExtractDep(jar: File): Seq[File] = {
       val cached = FileFunction.cached(
-        streams.cacheDirectory / jar.name,
+        cacheBaseDirectory / jar.name,
         inStyle = FilesInfo.lastModified,
         outStyle = FilesInfo.exists
       ) { deps =>
@@ -157,6 +160,13 @@ object SbtAvro extends AutoPlugin {
   }
 
   private def unpackDependenciesTask(key: TaskKey[Seq[File]]) = Def.task {
+    val cacheBaseDirectory = Defaults.makeCrossTarget(
+      streams.value.cacheDirectory,
+      scalaBinaryVersion.value,
+      (pluginCrossBuild / sbtBinaryVersion).value,
+      sbtPlugin.value,
+      crossPaths.value
+    )
     val conf = configuration.value.toConfigRef
     val avroArtifacts = update
       .value
@@ -165,6 +175,7 @@ object SbtAvro extends AutoPlugin {
       .collect { case (`conf`, _, _, file) => file }
 
     unpack(
+      cacheBaseDirectory = cacheBaseDirectory,
       deps = avroArtifacts,
       extractTarget = (key / target).value,
       includeFilter = (key / includeFilter).value,

src/sbt-test/sbt-avro/publishing/build.sbt

@@ -1,18 +1,26 @@
 lazy val commonSettings = Seq(
   organization := "com.github.sbt",
   publishTo := Some(Opts.resolver.sonatypeReleases),
-  scalaVersion := "2.13.11",
+  scalaVersion := "2.13.15",
   libraryDependencies ++= Seq(
     "org.apache.avro" % "avro" % avroCompilerVersion
   )
 )
 
+lazy val javaOnlySettings = Seq(
+  crossScalaVersions := Seq.empty,
+  crossPaths := false,
+  autoScalaLibrary := false,
+)
+
 lazy val `external`: Project = project
   .in(file("external"))
   .settings(commonSettings)
+  .settings(javaOnlySettings)
   .settings(
     name := "external",
     version := "0.0.1-SNAPSHOT",
+    crossScalaVersions := Seq.empty,
     crossPaths := false,
     autoScalaLibrary := false,
     Compile / packageAvro / publishArtifact := true
@@ -21,6 +29,7 @@ lazy val `external`: Project = project
 lazy val `transitive`: Project = project
   .in(file("transitive"))
   .settings(commonSettings)
+  .settings(javaOnlySettings)
   .settings(
     name := "transitive",
     version := "0.0.1-SNAPSHOT",
@@ -36,13 +45,14 @@ lazy val root: Project = project
   .settings(commonSettings)
   .settings(
     name := "publishing-test",
+    crossScalaVersions := Seq("2.13.15", "2.12.20"),
     libraryDependencies ++= Seq(
-      "com.github.sbt" %% "transitive" % "0.0.1-SNAPSHOT" classifier "avro",
-      "com.github.sbt" %% "transitive" % "0.0.1-SNAPSHOT" % Test classifier "tests",
+      "com.github.sbt" % "transitive" % "0.0.1-SNAPSHOT" classifier "avro",
+      "com.github.sbt" % "transitive" % "0.0.1-SNAPSHOT" % Test classifier "tests",
       "org.specs2" %% "specs2-core" % "4.20.8" % Test
     ),
     // add additional transitive test jar
-    avroDependencyIncludeFilter := avroDependencyIncludeFilter.value || artifactFilter(name = "transitive_2.13", classifier = "tests"),
+    avroDependencyIncludeFilter := avroDependencyIncludeFilter.value || artifactFilter(name = "transitive", classifier = "tests"),
     // exclude specific avsc file
     Compile / avroUnpackDependencies / excludeFilter := (Compile / avroUnpackDependencies / excludeFilter).value || "exclude.avsc"
   )

src/sbt-test/sbt-avro/publishing/test

@@ -24,17 +24,30 @@ $ exists target/scala-2.13/src_managed/compiled_avro/main/com/github/sbt/avro/te
 $ exists target/scala-2.13/src_managed/compiled_avro/main/com/github/sbt/avro/test/external/Avsc.java
 $ exists target/scala-2.13/src_managed/compiled_avro/main/com/github/sbt/avro/test/transitive/Avsc.java
 
-> compile
+> +compile
 
 $ exists target/scala-2.13/classes/com/github/sbt/avro/test/external/Avdl.class
 $ exists target/scala-2.13/classes/com/github/sbt/avro/test/external/Avpr.class
 $ exists target/scala-2.13/classes/com/github/sbt/avro/test/external/Avsc.class
 $ exists target/scala-2.13/classes/com/github/sbt/avro/test/transitive/Avsc.class
 
-> Test/compile
+
+$ exists target/scala-2.12/classes/com/github/sbt/avro/test/external/Avdl.class
+$ exists target/scala-2.12/classes/com/github/sbt/avro/test/external/Avpr.class
+$ exists target/scala-2.12/classes/com/github/sbt/avro/test/external/Avsc.class
+$ exists target/scala-2.12/classes/com/github/sbt/avro/test/transitive/Avsc.class
+
+> Test/avroUnpackDependencies
 
 $ exists target/scala-2.13/src_managed/avro/test/test.avsc
+
+> Test/avroGenerate
+
 $ exists target/scala-2.13/src_managed/compiled_avro/test/com/github/sbt/avro/test/transitive/Test.java
+
+> +Test/compile
+
 $ exists target/scala-2.13/test-classes/com/github/sbt/avro/test/transitive/Test.class
+$ exists target/scala-2.12/test-classes/com/github/sbt/avro/test/transitive/Test.class
 
 > clean