Generate Go file for protos with import dependencies using Protoc, a Reader service added to the proto

proto_folder\car\car_info.proto

syntax = "proto3";
package car;

import "common/vehicle_info.proto";

message Car {
    vehicle.Vehicle info = 1;
    string carType = 2;
}

service Reader {
    rpc GetPriceInfo(GetPriceInfoRequest) returns (GetPriceInfoResponse);
}

message GetPriceInfoRequest {
    string manufacturer = 1;
    string model = 2;
}

message GetPriceInfoResponse {
    vehicle.PurchaseEntity info = 1;
}

proto_folder\common\vehicle_info.proto

syntax = "proto3";
package vehicle;

message PurchaseEntity {
    string manufacturer = 1;
    string model = 2;
    int32 price = 3;
}

message Vehicle {
    PurchaseEntity info = 1;
    string engineType = 2;
    int32 wheelCount = 3;
    int32 registrationNumber = 4;
}

You can generate them together using..

protoc ^
    --proto_path=./proto_folder     ^
                                    ^
    --go_out=./generated_codes      ^
    --go_opt=Mcommon/vehicle_info.proto=generated_code_with_go_opt/vehicle_pkg ^
    --go_opt=Mcar/car_info.proto=generated_code_with_go_opt/car_pkg ^
                                    ^
    --go-grpc_out=./generated_codes ^
    --go-grpc_opt=Mcar/car_info.proto=generated_code_with_go_opt/car_pkg ^
                                    ^
    common/vehicle_info.proto       ^
    car/car_info.proto