Protobuf v3 osgi (#29172)

* register ActorSystem reference under ActorFactoryRef interface name

* reformat code

* add OSGi headers for akka-protobuf-v3

* change private package to only include proto files

build.sbt

@@ -303,6 +303,7 @@ lazy val protobuf = akkaModule("akka-protobuf")
   .disablePlugins(MimaPlugin)
 
 lazy val protobufV3 = akkaModule("akka-protobuf-v3")
+  .settings(OSGi.protobufV3)
   .settings(AutomaticModuleName.settings("akka.protobuf.v3"))
   .enablePlugins(ScaladocNoVerificationOfDiagrams)
   .disablePlugins(MimaPlugin)
@@ -317,6 +318,7 @@ lazy val protobufV3 = akkaModule("akka-protobuf-v3")
     exportJars := true, // in dependent projects, use assembled and shaded jar
     makePomConfiguration := makePomConfiguration.value
         .withConfigurations(Vector(Compile)), // prevent original dependency to be added to pom as runtime dep
+    packagedArtifact in (Compile, packageBin) := Scoped.mkTuple2((artifact in (Compile, packageBin)).value, OsgiKeys.bundle.value),
     packageBin in Compile := ReproducibleBuildsPlugin
         .postProcessJar((assembly in Compile).value), // package by running assembly
     // Prevent cyclic task dependencies, see https://github.com/sbt/sbt-assembly/issues/365

project/OSGi.scala

@@ -6,7 +6,6 @@ package akka
 
 import com.typesafe.sbt.osgi.OsgiKeys
 import com.typesafe.sbt.osgi.SbtOsgi._
-import com.typesafe.sbt.osgi.SbtOsgi.autoImport._
 import sbt._
 import sbt.Keys._
 import net.bzzt.reproduciblebuilds.ReproducibleBuildsPlugin
@@ -65,6 +64,17 @@ object OSGi {
 
   val protobuf = exports(Seq("akka.protobuf.*"))
 
+  val protobufV3 = osgiSettings ++ Seq(
+    OsgiKeys.importPackage := Seq(
+      "!sun.misc",
+      scalaJava8CompatImport(),
+      scalaVersion(scalaImport).value,
+      configImport(),
+      "*"),
+    OsgiKeys.exportPackage := Seq("akka.protobufv3.internal.*"),
+    OsgiKeys.privatePackage := Seq("google.protobuf.*")
+  )
+
   val jackson = exports(Seq("akka.serialization.jackson.*"))
 
   val remote = exports(Seq("akka.remote.*"))