flags.go

package main

import "fmt"
import "github.com/spf13/cobra"
import "os"

var works bool

func init() {
	rootCmd.PersistentFlags().BoolVar(&works, "works", false, "testing flag behaviour")
}

var rootCmd = &cobra.Command{
	Use: "flags",
	Run: func(cmd *cobra.Command, args []string) {
		if !cmd.Flags().Lookup("works").Changed {
			fmt.Printf("use default")
		} else {
			if works {
				fmt.Printf("works set to true")
			} else {
				fmt.Printf("works set to false")
			}
		}
	},
}

func main() {
	if err := rootCmd.Execute(); err != nil {
		fmt.Sprintf("err=%s", err)
		os.Exit(1)
	}
}