reproduce code for issue 479

src/sbt-test/shading/jdk17/build.sbt

@@ -0,0 +1,19 @@
+scalaVersion := "2.13.12"
+
+assembly / assemblyShadeRules := Seq(
+  ShadeRule.rename("example.A" -> "example.B").inProject
+)
+
+TaskKey[Unit]("writeSealedJavaCodeIf17") := {
+  if (scala.util.Properties.isJavaAtLeast("17")) {
+    IO.write(
+      file("A.java"),
+      """package example;
+
+      public sealed interface A {
+        final class X implements A {}
+      }
+      """
+    )
+  }
+}

src/sbt-test/shading/jdk17/project/plugins.sbt

@@ -0,0 +1,7 @@
+{
+  val pluginVersion = System.getProperty("plugin.version")
+  if (pluginVersion == null)
+    throw new RuntimeException("""|The system property 'plugin.version' is not defined.
+                                  |Specify this property using the scriptedLaunchOpts -D.""".stripMargin)
+  else addSbtPlugin("com.eed3si9n" % "sbt-assembly" % pluginVersion)
+}

src/sbt-test/shading/jdk17/test

@@ -0,0 +1,2 @@
+> writeSealedJavaCodeIf17
+> assembly