actual changes :3

grpc-backend/Makefile

@@ -0,0 +1,30 @@
+# Paths
+PROTO_DIR = proto
+GOOGLEAPIS_DIR = googleapis
+OUT_DIR = gen
+
+PROTO_FILE = osu_music.proto
+
+# Protoc plugins (assumed in PATH)
+PROTOC ?= protoc
+PROTOC_GEN_GO ?= protoc-gen-go
+PROTOC_GEN_GO_GRPC ?= protoc-gen-go-grpc
+PROTOC_GEN_GRPC_GATEWAY ?= protoc-gen-grpc-gateway
+PROTOC_GEN_OPENAPIV2 ?= protoc-gen-openapiv2
+
+all: generate
+
+generate:
+	$(PROTOC) \
+		-I $(PROTO_DIR) \
+		-I $(GOOGLEAPIS_DIR) \
+		--go_out $(OUT_DIR) --go_opt paths=source_relative \
+		--go-grpc_out $(OUT_DIR) --go-grpc_opt paths=source_relative \
+		--grpc-gateway_out $(OUT_DIR) --grpc-gateway_opt paths=source_relative \
+		--openapiv2_out $(OUT_DIR)/swagger \
+		$(PROTO_DIR)/$(PROTO_FILE)
+
+clean:
+	rm -rf $(OUT_DIR)
+
+.PHONY: all generate clean