go-ucfg

ucfg - Universal Configuration
ucfg is a Golang library to handle hjson, json, and yaml configuration files in your Golang project. It was developed for the libbeat framework and used by all beats.

Dot notations
ufcg allows you to load yaml configuration files using dots instead of indentation. For example instead of having:

config:
user: name

with ucfg you can write:

config.user: name

 

实践
$ go get github.com/elastic/go-ucfg

package main
import (
        "fmt"
        "os"
        "github.com/elastic/go-ucfg"
        "github.com/elastic/go-ucfg/yaml"
    )

type person struct {
    Age int  `config:"age"`

}

type ExampleConfig struct {
    Counter  int        `config:"counter" validate:"min=0, max=9"`
    Person   person     `config:"config"`
}

// Defines default config option
var (
    defaultConfig = ExampleConfig{
                    Counter: 8,
                    Person: person{ Age: 8, },
    }
)

func main() {
    appConfig := defaultConfig // copy default config so it's not overwritten
    config, err := yaml.NewConfigWithFile("/home/cts/test/x.yml", ucfg.PathSep("."))
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }
    err = config.Unpack(&appConfig)
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    fmt.Printf("counter:%d, age:%d\n", appConfig.Counter, appConfig.Person.Age)
}

 

#x.yml
config.age: 18
counter: 8

或者

#x.yml
config:
        age: 18
counter: 9

运行结果：

cts@cts-pc:~/test$ ./test
counter:9, age:18