1 files changed, 58 insertions, 0 deletions
diff --git a/tunnel/build.gradle.kts b/tunnel/build.gradle.kts
index fff3857d..7f6bd0e6 100644
--- a/tunnel/build.gradle.kts
+++ b/tunnel/build.gradle.kts
@@ -1,5 +1,6 @@
 @file:Suppress("UnstableApiUsage")
 
+import com.google.protobuf.gradle.*
 import org.gradle.api.tasks.testing.logging.TestLogEvent
 
 val pkg: String = providers.gradleProperty("wireguardPackageName").get()
@@ -7,6 +8,7 @@ val pkg: String = providers.gradleProperty("wireguardPackageName").get()
 plugins {
     alias(libs.plugins.android.library)
     `maven-publish`
+    alias(libs.plugins.google.protobuf)
     signing
 }
 
@@ -67,10 +69,66 @@ android {
 dependencies {
     implementation(libs.androidx.annotation)
     implementation(libs.androidx.collection)
+    implementation(libs.grpc.android)
+    implementation(libs.grpc.okhttp)
+    implementation(libs.grpc.protobuf.lite)
+    implementation(libs.grpc.stub)
+    compileOnly(libs.javax.annotation.api)
     compileOnly(libs.jsr305)
     testImplementation(libs.junit)
 }
 
+protobuf {
+    protoc {
+        // The artifact spec for the Protobuf Compiler
+        artifact = "com.google.protobuf:protoc:${libs.versions.protoc.get()}"
+    }
+    plugins {
+        // Optional: an artifact spec for a protoc plugin, with "grpc" as
+        // the identifier, which can be referred to in the "plugins"
+        // container of the "generateProtoTasks" closure.
+        id("grpc") {
+            artifact = "io.grpc:protoc-gen-grpc-java:${libs.versions.protocgengrpc.get()}"
+        }
+        id("java") {
+        }
+    }
+    generateProtoTasks {
+        all().forEach { task ->
+            task.plugins{
+                id("grpc") {
+                    option("lite")
+                }
+                id("java") {
+                    option("lite")
+                }
+            }
+        }
+    }
+}
+
+afterEvaluate({ ->
+    // All custom configurations created by the protobuf plugin,
+    // are only available at this point.
+    var protoc = configurations.named("protobufToolsLocator_protoc")
+    var protocCache = "${gradle.gradleUserHomeDir}/caches/protoc-bin-${libs.versions.protoc.get()}"
+
+    tasks.register("copyProtoc", Copy::class) {
+        // Used by tunnel/tools/libwg-go/Makefile run in tools/CMakeLists.txt
+        from(protoc)
+        into(protocCache)
+        rename("protoc-.*", "protoc")
+        setFileMode(7 * 64 + 7 * 8 + 5) // 0775
+    }
+
+    tasks.named("preBuild").get().dependsOn("copyProtoc")
+
+    // Extract duration.proto used by external library in libwg.proto
+    tasks.named("preDebugBuild").get().dependsOn(tasks.named("extractIncludeDebugProto").get())
+    tasks.named("preReleaseBuild").get().dependsOn(tasks.named("extractIncludeReleaseProto").get())
+    println("done afterEvaluate")
+})
+
 publishing {
     publications {
         register<MavenPublication>("release") {