Go语言中使用urfave/cli命令行框架

package main
 
import (
   "fmt"
   "os"
)
 
func main() {
 
   if(len(os.Args) > 1) {
      for _,value := range os.Args{
         fmt.Printf( "%v\n",value)
      }
      return
   }
   fmt.Printf( "%s","没输入参数")
}

package main
 
import (
    "flag"
    "fmt"
)
 
var recusive bool
var test string
var level int
 
func init() {
    flag.BoolVar(&recusive, "r", false, "Recusive xxxx")
    flag.StringVar(&test, "t", "Default String", "string option")
    flag.IntVar(&level, "l", 1, "level of xxxx")
    flag.Parse()
}
 
func main() {
    fmt.Println("recusive:", recusive)
    fmt.Println("test:", test)
    fmt.Println("level:", level)
}

// StringVar defines a string flag with specified name, default value, and usage string.
// The argument p points to a string variable in which to store the value of the flag.
func StringVar(p *string, name string, value string, usage string) {
    CommandLine.Var(newStringValue(value, p), name, usage)
}

package main
 
import (
    "fmt"
    "os"
 
    "github.com/urfave/cli" //必须使用这个包
)
 
func main() {
 
    //定义两个变量用于接收控制台输入的值
    var stringValue string
    var boolValue bool
 
    //new一个app出来，就是我们的命令行程序
    app := cli.NewApp()
    app.Name = "TestCliApp" //起个名称
    app.Usage = "Test"      //描述一下用途
    app.Version = "2.0.0"   //设置一下版本号
    //重点可以设置一些选项操作
    //第一个是一个字符串的选项，第二个是一个布尔的选项
    app.Flags = []cli.Flag{
        cli.StringFlag{
            Name:        "StringOption,s",
            Value:       "DefaultValue",
            Usage:       "Display a string value",
            Destination: &stringValue,
        },
        cli.BoolFlag{
            Name:        "BoolOption,b",
            Usage:       "Display a bool value",
            Destination: &boolValue,
        },
    }
     
    //定义我们命令行程序主要的工作
    app.Action = func(c *cli.Context) error {
 
        if c.NArg() > 0 {
            cmds := c.Args()
            for index, v := range cmds {
                fmt.Printf("args[%d]=%v\t", index, v)
            }
        } else {
            fmt.Println("No Args")
        }
 
        fmt.Println("stringOption", stringValue)
        fmt.Println("boolOption", boolValue)
        return nil
    }
 
    //执行程序
    app.Run(os.Args)
}