Go
YAML

YAML形式の設定ファイルの作成

import (
    "io/ioutil"
    "path/filepath"

    "gopkg.in/yaml.v2"
)

func main() {
    filename, _ := filepath.Abs("config/config.yml")
    yamlFile, err := ioutil.ReadFile(filename)
    var config Config
    err = yaml.Unmarshal(yamlFile, &config)
    if err != nil {
        panic(err)
    }
    //env can be accessed from config.Env
}

type Config struct {
    Env                 string `yaml:"env"`
}

//config.yml should be placed in config/config.yml for example, and needs to have the following line for the above example:
//env: test