package main

import (
	"fmt"
	"time"
	"github.com/spf13/pflag"
	"github.com/spf13/viper"
)

func f1() {
	v := viper.New()

	flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
	flagSet.String("name", "", "test")

	v.BindPFlags(flagSet)
	flagSet.VisitAll(func(flag *pflag.Flag) {
		flag.Value.Set("set")
		flag.Changed = true
	})
	fmt.Print(v.Get("name"))
}

func main() {

	flagSet := pflag.NewFlagSet("test", pflag.ContinueOnError)
	flagSet.IntSlice("ok2", []int{1, 2}, "")
	flagSet.StringSlice("ok1", []string{"s1", "s2"}, "")
	flagSet.DurationSlice("fail", []time.Duration{time.Second, time.Hour}, "")

	v := viper.New()
	v.BindPFlags(flagSet)

	ok1 := v.AllSettings()["ok1"]
	fmt.Printf("%v %T\n", ok1, ok1) //[s1 s2] []string

	ok2 := v.AllSettings()["ok2"]
	fmt.Printf("%v %T\n", ok2, ok2) //[1 2] []int

	fail := v.AllSettings()["fail"]
	fmt.Printf("%v %T\n", fail, fail) //[1s,1h0m0s] string
}