tunnel: add gRPC over unix domain socket to the go backend

With gRPC it will be easier to extend the go backend API.
In this commit the Version function is reimplemented in gRPC.

1 files changed, 31 insertions, 0 deletions

diff --git a/tunnel/build.gradle b/tunnel/build.gradle
index ff1aad19..8cffa1e6 100644
--- a/tunnel/build.gradle
+++ b/tunnel/build.gradle
@@ -1,5 +1,6 @@
 plugins {
     id 'com.android.library'
+    id 'com.google.protobuf'
 }
 
 version wireguardVersionName
@@ -52,8 +53,38 @@ android {
 dependencies {
     implementation "androidx.annotation:annotation:$annotationsVersion"
     implementation "androidx.collection:collection:$collectionVersion"
+    implementation "io.grpc:grpc-okhttp:$grpcVersion"
+    implementation "io.grpc:grpc-protobuf-lite:$grpcVersion"
+    implementation "io.grpc:grpc-stub:$grpcVersion"
     compileOnly "com.google.code.findbugs:jsr305:$jsr305Version"
+    compileOnly "javax.annotation:javax.annotation-api:1.2"
     testImplementation "junit:junit:$junitVersion"
 }
 
+protobuf {
+    protoc {
+        // You still need protoc like in the non-Android case
+        artifact = "com.google.protobuf:protoc:$protocVersion"
+    }
+    plugins {
+        grpc {
+            artifact = "io.grpc:protoc-gen-grpc-java:$grpcVersion"
+        }
+    }
+    generateProtoTasks {
+        all().each { task ->
+            task.builtins {
+                java {
+                    option 'lite'
+                }
+            }
+            task.plugins {
+                grpc {
+                    option 'lite'
+                }
+            }
+        }
+    }
+}
+
 apply from: "publish.gradle"