go flags学习

参考：
https://github.com/fanux/sealos/blob/master/cmd/init.go
https://blog.51cto.com/u_15081058/2594831

package main


import (
   "fmt"
   "github.com/spf13/cobra"
   "os"
)
var initCmd = &cobra.Command{
   Use:   "init",
   Run: func(test101 *cobra.Command, args []string) {
      fmt.Println(s)

   },
}

var s []string
var test= []string{"che","yunhua"}
func init() {
   rootCmd.AddCommand(initCmd)
   initCmd.Flags().StringSliceVarP(&s,"master","m",test,"plase is a string slinc")


}
var rootCmd = &cobra.Command{
   Use:   "test101",
   Short: "simplest way install kubernetes tools.",
   // Uncomment the following line if your bare application
   // has an action associated with it:
   // Run: func(cmd *cobra.Command, args []string) { },
}

// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
   if err := rootCmd.Execute(); err != nil {
      fmt.Println(err)
      os.Exit(1)
   }
}

func main() {
   Execute()

}