protoc --go_out=./gen --go_opt=paths=source_relative test.proto

syntax = "proto3";
package test;
option go_package = "proto/test";
enum MyEnum {
 unknown = 0;
 name = 1;
 value = 2;
}

MyEnum_name redeclared in this block
MyEnum_value redeclared in this block

type MyEnum int32
const (
	MyEnum_unknown MyEnum = 0
	MyEnum_name MyEnum = 1
	MyEnum_value MyEnum = 2
)
// Enum value maps for MyEnum.
var (
	MyEnum_name = map[int32]string{
		0: "unknown",
		1: "name",
		2: "value",
	}
	MyEnum_value = map[string]int32{
		"unknown": 0,
		"name": 1,
		"value": 2,
	}
)