protobuf组织结构

此处以一个项目talkischeap为例。

​ 运行程序时，一般在talkischeap目录下运行。

基本文件目录结构：

talkischeap
	-| proto
		-| addressboook.proto
	-| google
		-| protobuf
			-| timestd.proto

具体代码：

addressbook.proto代码：

// [START declaration]
syntax = "proto3";
package tutorial;  //注意包名是tutorial


option go_package = "proto/tutorialtb"; //注意指定生成的go程序的包是package tutorialtb。和文件名无关，文件名是proto文件的相对名称。

import "google/protobuf/timestd.proto";
// 注意导入了相对位置在google/protobuf目录下的timestd.proto.

message Person {
  string name = 1;
  int32 id = 2;  // Unique ID number for this person.
  string email = 3;

  enum PhoneType {
    MOBILE = 0;
    HOME = 1;
    WORK = 2;
  }

  message PhoneNumber {
    string number = 1;
    PhoneType type = 2;
  }

  repeated PhoneNumber phones = 4;

  google.protobuf.Timestamp last_updated = 5;
  //注意此处，引用的是google.protobuf包下的Timstamp，在timestd.proto包中。
  
}

// Our address book file is just one of these.
message AddressBook {
  repeated Person people = 1;
}
// [END messages]

​ timestd.proto中的代码

syntax = "proto3";

package google.protobuf;  //注意包名是google.protobuf.

option go_package = "proto/tutorialpb/timestamp";
//注意指定生成的go程序的包是package timestamp。和文件名无关，文件名是proto文件的相对名称。


message Timestamp {
  // Represents seconds of UTC time since Unix epoch
  // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
  // 9999-12-31T23:59:59Z inclusive.
  int64 seconds = 1;

  // Non-negative fractions of a second at nanosecond resolution. Negative
  // second values with fractions must still have non-negative nanos values
  // that count forward in time. Must be from 0 to 999,999,999
  // inclusive.
  int32 nanos = 2;
}

最终生成的目录结构如下：

talkischeap
	-| proto
		-| addressboook.proto
	-| tutorialpb
		-| timestamp
			-| tiemstd.pb.go
	-| tutorialtb
		-| addressbook.pb.go
	-| google
		-| protobuf
			-| timestd.proto

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