[Go] gocron源码阅读-通过第三方cli包实现命令行参数获取和管理

gocron源码中使用的是下面这个第三方包来实现的，下面就单独的拿出来测试以下效果，和官方flag包差不多

go get github.com/urfave/cli

package main

import (
    "fmt"
    "log"
    "os"

    "github.com/urfave/cli"
)

func main() {
    app := cli.newapp()
    var flags []cli.flag
    flags = append(flags, cli.stringflag{
        name:  "host",
        value: "0.0.0.0",
        usage: "bind host",
    }, cli.intflag{
        name:  "port,p",
        value: 5090,
        usage: "bind port",
    }, cli.stringflag{
        name:  "env,e",
        value: "prod",
        usage: "runtime environment, dev|test|prod",
    })
    app.flags = flags

    app.action = func(c *cli.context) error {

        fmt.println("host:", c.string("host"))
        fmt.println("port:", c.string("port"))
        fmt.println("env:", c.string("env"))
        return nil
    }

    err := app.run(os.args)
    if err != nil {
        log.fatal(err)
    }
}