golang load config

main.go

package main

type Config struct {
	Server struct {
		Bind string `config:"default:0.0.0.0:9000;env:CONFIG_SERVER_BIND"`
		Mode string `config:"default:debug;env:CONFIG_SERVER_MODE"`
	}
}

var Data Config

func Load(v interface{}) error {

	// TODO

	return nil
}

func main() {
	if err := Load(&Data); err != nil {
		panic(err)
	}
}

Hi, I got a new method of configuration load in golang. As the code show, it allows programmer to set label "config" to describe default value and load value from environment name. But I don't know how to implement it.

It would be very thankful to help me out with TODO part.

envconfig does this, might meet your needs

type Config struct {
        Bind string `env:"CONFIG_SERVER_BIND,default=0.0.0.0:9000"`
        Mode string `env:"CONFIG_SERVER_MODE,default=debug"`
}

func New() (*Config, error) {
	var config Config

	if err := envconfig.Process(context.Background(), &config); err != nil {
		return nil, fmt.Errorf("error getting var envs: %w", err)
	}

	return &config, nil
}

envconfig does this, might meet your needs

Thanks, that's awesome.