|  | // Copyright 2010 The Go Authors. All rights reserved. | 
|  | // Use of this source code is governed by a BSD-style | 
|  | // license that can be found in the LICENSE file. | 
|  |  | 
|  | package flag | 
|  |  | 
|  | import "os" | 
|  |  | 
|  | // Additional routines compiled into the package only during testing. | 
|  |  | 
|  | var DefaultUsage = Usage | 
|  |  | 
|  | // ResetForTesting clears all flag state and sets the usage function as directed. | 
|  | // After calling ResetForTesting, parse errors in flag handling will not | 
|  | // exit the program. | 
|  | func ResetForTesting(usage func()) { | 
|  | CommandLine = NewFlagSet(os.Args[0], ContinueOnError) | 
|  | CommandLine.Usage = commandLineUsage | 
|  | Usage = usage | 
|  | } |