java_protobuf_sbt.sbt

val grpcJavaVersion = "1.3.0"

val downloadJGrpc = {
  val grpcArtifactId = "protoc-gen-grpc-java"

  val jgrpcExeFileName = {
    val os = if (scala.util.Properties.isMac) "osx-x86_64"
    else if (scala.util.Properties.isWin) "windows-x86_64"
    else "linux-x86_64"

    s"protoc-gen-grpc-java-$grpcJavaVersion-$os.exe"
  }
  val remoteUrl = url(s"http://repo1.maven.org/maven2/io/grpc/$grpcArtifactId/$grpcJavaVersion/$jgrpcExeFileName")
  val exe: File = Files.createTempDirectory("tmp").toFile / jgrpcExeFileName
  println("downloading grpc protoc plugin (for Java)")
  if (!exe.exists()){
    println("grpc protoc plugin (for Java) does not exist. Downloading.")
    IO.download(remoteUrl, exe)
    exe.setExecutable(true)
  }
  exe
}

val modelsSettings = Seq(
  libraryDependencies ++= Seq(
    "com.google.protobuf" % "protobuf-java" % "3.3.1" % "protobuf",
    "com.trueaccord.scalapb" %% "scalapb-runtime" % com.trueaccord.scalapb.compiler.Version.scalapbVersion % "protobuf",
    "com.trueaccord.scalapb" %% "scalapb-runtime-grpc" % com.trueaccord.scalapb.compiler.Version.scalapbVersion,
    "io.grpc" % "grpc-netty" % grpcJavaVersion,
    "io.grpc" % "grpc-protobuf" % grpcJavaVersion,
    "io.grpc" % "grpc-stub" % grpcJavaVersion,
    "io.grpc" % "protoc-gen-grpc-java" % grpcJavaVersion
  ),
  publishArtifact in (Compile, packageDoc) := false,
  PB.protoSources in Compile := Seq(file("models/protobuf")),
  PB.targets in Compile := Seq(
    PB.gens.java -> (sourceManaged in Compile).value,
    scalapb.gen(javaConversions=true) -> (sourceManaged in Compile).value,
    protocbridge.BuiltinGenerator("jgrpc") -> (sourceManaged in Compile).value
  ),
  PB.protocOptions in Compile ++= Seq(
    s"--plugin=protoc-gen-jgrpc=$downloadJGrpc"
  )
)