golang的框架如何在不同服务之间实现代码复用？

// mycommon/foo.go
package mycommon

func Foo() string {
  return "Hello, world!"
}

// myservice1/main.go
package main

import (
  "github.com/your-org/mycommon"
)

func main() {
  fmt.Println(mycommon.Foo())
}

// libcommon.go
package main

import (
  "fmt"
)

func Foo() {
  fmt.Println("Hello, world!")
}

func main() {
  Foo()
}

go build -buildmode=c-shared -o libcommon.so main.go

// myservice1/main.go
package main

/*
#cgo LDFLAGS: -L. -lcommon
*/
import "C"

func main() {
  C.Foo()
}

// greetings.proto
syntax = "proto3";

package greetings; // 协议包名

message Request {
  string name = 1;
}

message Response {
  string message = 1;
}

service Greeter {
  rpc SayHello(Request) returns (Response);
}

protoc --go_out=plugins=grpc:. greetings.proto

// server/main.go
package main

import (
  "context"

  "github.com/your-org/greetings/greeterpb"
)

func main() {
  // ... gRPC server logic here ...
}

// client/main.go
package main

import (
  "context"

  "github.com/your-org/greetings/greeterpb"
)

func main() {
  // ... gRPC client logic here ...
}

package common

import (
  "fmt"
  "net/http"
)

// AuthenticateUser 验证用户信息
func AuthenticateUser(username, password string) (*http.Request, error) {
  // ... authentication logic here ...
}

import (
  "github.com/your-org/common"
)

func main() {
  // ... user service logic here ...
}

import (
  "github.com/your-org/common"
)

func main() {
  // ... order service logic here ...
}