delta client/server infrastructure

src/app/delta/CMakeLists.txt

@@ -0,0 +1,32 @@
+
+add_library(delta-service delta.proto)
+target_link_libraries(delta-service
+  PUBLIC
+    protobuf::libprotobuf
+    gRPC::grpc
+    gRPC::grpc++
+)
+
+target_include_directories(delta-service
+  PUBLIC
+    ${CMAKE_CURRENT_BINARY_DIR}
+    ${PROTOBUF_INCLUDE_PATH}
+)
+
+get_target_property(grpc_cpp_plugin_location gRPC::grpc_cpp_plugin LOCATION)
+
+# compile the message types
+protobuf_generate(TARGET delta-service LANGUAGE cpp)
+
+# compile the GRPC services
+protobuf_generate(
+  TARGET
+    delta-service
+  LANGUAGE
+    grpc
+  GENERATE_EXTENSIONS
+    .grpc.pb.h
+    .grpc.pb.cc
+  PLUGIN
+    "protoc-gen-grpc=${grpc_cpp_plugin_location}"
+)