package utils
 
 import (
 	"fmt"
 	"os"
 
 	flag "github.com/docker/docker/pkg/mflag"
 )
 
 // ParseFlags is a utility function that adds a help flag if withHelp is true,

 // calls cmd.Parse(args) and prints a relevant error message if there are
 // incorrect number of arguments. It returns error only if error handling is
 // set to ContinueOnError and parsing fails. If error handling is set to
 // ExitOnError, it's safe to ignore the return value.

 // TODO: move this to a better package than utils
 func ParseFlags(cmd *flag.FlagSet, args []string, withHelp bool) error {
 	var help *bool
 	if withHelp {
 		help = cmd.Bool([]string{"#help", "-help"}, false, "Print usage")
 	}
 	if err := cmd.Parse(args); err != nil {
 		return err
 	}
 	if help != nil && *help {
 		cmd.Usage()
 		// just in case Usage does not exit
 		os.Exit(0)
 	}
 	if str := cmd.CheckArgs(); str != "" {

 		ReportError(cmd, str, withHelp)

 	}
 	return nil
 }

 
 func ReportError(cmd *flag.FlagSet, str string, withHelp bool) {
 	if withHelp {
 		if os.Args[0] == cmd.Name() {
 			str += ". See '" + os.Args[0] + " --help'"
 		} else {
 			str += ". See '" + os.Args[0] + " " + cmd.Name() + " --help'"
 		}
 	}
 	fmt.Fprintf(cmd.Out(), "docker: %s.\n", str)
 	os.Exit(1)
 }