golang flag使用示例

1. package main
   

2. import (
   

3. "fmt"
   

4. "flag"
   

5. )
   

6. 
   

7. func main(){
   

8. 
   

9. data_path := flag.String("D","/home/manu/sample/","DB data path")
   

10. log_file := flag.String("l","/home/manu/sample.log","log file")
    

11. nowait_flag :=flag.Bool("W",false,"do not wait until operation completes")
    

12. 
    

13. flag.Parse()
    

14. 
    

15. var cmd string = flag.Arg(0);
    

16. 
    

17. fmt.Printf("action : %s\n",cmd)
    

18. fmt.Printf("data path: %s\n",*data_path)
    

19. fmt.Printf("log file : %s\n",*log_file)
    

20. fmt.Printf("nowait : %v\n",*nowait_flag)
    

21. 
    

22. fmt.Printf("-------------------------------------------------------\n")
    

23. 
    

24. fmt.Printf("there are %d non-flag input param\n",flag.NArg())
    

25. for i,param := range flag.Args(){
    

26. fmt.Printf("#%d :%s\n",i,param)
    

27. }
    

28. 
    

29. 
    

30. }