代码

https://github.com/fengchunjian/goexamples/viper

//main.go
package main

import (
    "fmt"
    "github.com/spf13/viper"
    "os"
    "strings"
)

const cmdRoot = "core"

func main() {
    viper.SetEnvPrefix(cmdRoot)
    viper.AutomaticEnv()
    replacer := strings.NewReplacer(".", "_")
    viper.SetEnvKeyReplacer(replacer)
    viper.SetConfigName(cmdRoot)
    viper.AddConfigPath("./")

    err := viper.ReadInConfig()
    if err != nil {
        fmt.Println(fmt.Errorf("Fatal error when reading %s config file:%s", cmdRoot, err))
        os.Exit(1)
    }

    environment := viper.GetBool("security.enabled")
    fmt.Println("security.enabled:", environment)

    fullstate := viper.GetString("statetransfer.timeout.fullstate")
    fmt.Println("statetransfer.timeout.fullstate:", fullstate)

    abcdValue := viper.GetString("peer.abcd")
    fmt.Println("peer.abcd:", abcdValue)
}

//core.yaml
statetransfer:
    recoverdamage: true
    blocksperrequest: 20
    maxdeltas: 200
    timeout:
        singleblock: 2s
        singlestatedelta: 2s
        fullstate: 60s
peer:
    abcd:   3322d

编译

go get github.com/spf13/viper
go build -o vip

处理go get github.com/spf13/viper过程中问题

unrecognized import path "golang.org/x/sys/unix"
unrecognized import path "golang.org/x/text/transform"
unrecognized import path "golang.org/x/text/unicode/norm"
解决办法：
git clone https://github.com/golang/sys.git $GOPATH/src/golang.org/x/sys
git clone https://github.com/golang/text.git $GOPATH/src/golang.org/x/text

运行

CORE_SECURITY_ENABLED=true ./vip
security.enabled: true
statetransfer.timeout.fullstate: 60s
peer.abcd: 3322d

参考文档

golang插件viper
http://blog.csdn.net/qq_27809391/article/details/54091977