WARNING: Missing 'go_package' option in "filename.proto"

项目结构：

.
├── go.mod
├── go.sum
├── main.go
└── protoFiles
    └── stu.proto

---

修改前的stu.proto：

syntax = "proto3";

package protoFiles;

enum Sex{
   Male = 0;
   Female = 1;
}

message Student{
   int32 id = 1;
   string name = 2;
   Sex sex = 3;
}

---

修改后的stu.proto：

syntax = "proto3";
option go_package = ".;protoFiles";

package protoFiles;

enum Sex{
   Male = 0;
   Female = 1;
}

message Student{
   int32 id = 1;
   string name = 2;
   Sex sex = 3;
}