Function printFlagSuggestions

help.go:215–248

(lastArg string, flags []Flag, writer io.Writer)

}

func printFlagSuggestions(lastArg string, flags []Flag, writer io.Writer) {
	// Trim to handle both "-short" and "--long" flags.
	cur := strings.TrimLeft(lastArg, "-")
	for _, flag := range flags {
		if bflag, ok := flag.(*BoolFlag); ok && bflag.Hidden {
			continue
		}

		usage := ""
		if docFlag, ok := flag.(DocGenerationFlag); ok {
			usage = docFlag.GetUsage()
		}

		name := strings.TrimSpace(flag.Names()[0])
		// this will get total count utf8 letters in flag name
		count := utf8.RuneCountInString(name)
		if count > 2 {
			count = 2 // reuse this count to generate single - or -- in flag completion
		}
		// if flag name has more than one utf8 letter and last argument in cli has -- prefix then
		// skip flag completion for short flags example -v or -x
		if strings.HasPrefix(lastArg, "--") && count == 1 {
			continue
		}
		// match if last argument matches this flag and it is not repeated
		if strings.HasPrefix(name, cur) && cur != name /* && !cliArgContains(name, os.Args)*/ {
			flagCompletion := fmt.Sprintf("%s%s", strings.Repeat("-", count), name)
			if usage != "" {
				flagCompletion = fmt.Sprintf("%s:%s", flagCompletion, usage)
			}
			fmt.Fprintln(writer, flagCompletion)
		}
	}
}

func DefaultCompleteWithFlags(ctx context.Context, cmd *Command) {
	args := os.Args