golang plugin example

config.yml

plugin:
  name: "test"

interface.go

package main

type IPlugin interface {
	Load()
	PluginName() string
}

main.go

// go build
package main

import (
	"fmt"
	"github.com/gookit/config/v2"
	"github.com/gookit/config/v2/yaml"
	"github.com/sirupsen/logrus"
	"log"
	"plugin"
)

func main() {
	LoadGlobalConfig("./config.yml")
	p, err := plugin.Open("plugin.so")
	if err != nil {
		log.Fatal(err)
	}

	symbol, err := p.Lookup("Instance")
	if err != nil {
		log.Fatal(err)
	}

	pl := symbol.(IPlugin)

	pl.Load()
	fmt.Println(pl.PluginName())
}

func LoadGlobalConfig(filepath string) {
	config.WithOptions(config.ParseEnv)

	config.AddDriver(yaml.Driver)

	err := config.LoadFiles(filepath)
	if err != nil {
		logrus.WithField("error", err).Errorln("Load config file failed.")
	}
}

plugin.go

// go build -buildmode=plugin -o plugin.so plugin.go interface.go 
package main

import (
	"github.com/gookit/config/v2"
)

type Plugin struct {
	name string
}

func (p *Plugin) Load() {
	// 测试在外界加载的 config，插件加载后是否可读
	p.name = config.String("plugin.name")
}

func (p *Plugin) PluginName() string {
	return p.name
}

var Instance Plugin