package version

import (
	"encoding/json"
	"flag"
	"fmt"
	"os"
)

var (
	BuildVersion string
	BuildTime    string
	CommitSha1   string
	AppName      string
)

func init() {
	var showVer bool
	flag.BoolVar(&showVer, "v", false, "display build version")
	flag.Parse()
	if showVer {
		info := make(map[string]interface{})
		info["version"] = BuildVersion
		info["build"] = BuildTime
		info["commit"] = CommitSha1
		info["name"] = AppName

		b, err := json.Marshal(info)
		if nil != err {
			fmt.Println("internal error:", err)
			os.Exit(1)
		} else {
			fmt.Println(string(b))
			os.Exit(0)
		}
	}
}