Go中的getopt-like行为

使用“flag”包: http://golang.org/pkg/flag/ . 但是,它不执行双破折号参数。没有任何东西可以完全模仿GNU的getopt行为。

谷歌创造了一个 getopt 包装(包装) import "github.com/pborman/getopt" )它提供了更标准的命令行分析(与“flag”包相比)。

package main

import (
    "fmt"
    "os"
    "github.com/pborman/getopt"
)

func main() {
    optName := getopt.StringLong("name", 'n', "", "Your name")
    optHelp := getopt.BoolLong("help", 0, "Help")
    getopt.Parse()

    if *optHelp {
        getopt.Usage()
        os.Exit(0)
    }

    fmt.Println("Hello " + *optName + "!")
}

$ ./hello --help
Usage: hello [--help] [-n value] [parameters ...]
     --help        Help
 -n, --name=value  Your name

$ ./hello --name Bob
Hello Bob!

在“命令行用户界面”部分,有几个库可以解析 getopt-long parameters .

我试过了,用go1.0.2:

• 这个 code.google.com/p/opts-go (见 its documentation )这是不太可行的。
• 这个 github.com/droundy/goopt (见 its documentation ) complete set of examples .

例子:

package main

import (
    "fmt"
    goopt "github.com/droundy/goopt"
)

func main() {
    fmt.Println("flag")
    goopt.NoArg([]string{"--abc"}, "abc param, no value", noabc)

    goopt.Description = func() string {
        return "Example program for using the goopt flag library."
    }
    goopt.Version = "1.0"
    goopt.Summary = "goopt demonstration program"
    goopt.Parse(nil)
}

func noabc() error {
    fmt.Println("You should have an --abc parameter")
    return nil
}

提供的其他默认参数 goopt 以下内容:

 --help               Display the generated help message (calls Help())
 --create-manpage     Display a manpage generated by the goopt library (uses Author, Suite, etc)
 --list-options       List all known flags

我只是为你做的:

package main

import (
  "fmt";
  "os"
)

func main() {
  for i, arg := range os.Args {
    if arg == "-help" {
      fmt.Printf ("I need somebody\n")
    }else if arg == "-version" {
      fmt.Printf ("Version Zero\n")
    } else {
      fmt.Printf("arg %d: %s\n", i, os.Args[i])
    }
  }
}

也见 https://play.golang.org/p/XtNXG-DhLI

测试:

$ ./8.out -help -version monkey business
I need somebody
Version Zero
arg 3: monkey
arg 4: business

go-flags 非常完整,BSD许可,并且 example .

var opts struct {
      DSomething string `short:"d" description:"Whatever this is" required:"true"`
      ABC bool `long:"abc" description:"Something"`
}

fileArgs, err := flags.Parse(&opts)

if err != nil {
    os.Exit(1)
}

另一个选择是 Kingping 它为您期望从现代命令行解析库得到的所有标准产品提供支持。它有 --help 在多种格式、子命令、需求、类型、默认值等中,它仍在开发中。这里的其他建议似乎已经有一段时间没有更新了。

package main

import (
  "os"
  "strings"
  "gopkg.in/alecthomas/kingpin.v2"
)

var (
  app      = kingpin.New("chat", "A command-line chat application.")
  debug    = app.Flag("debug", "Enable debug mode.").Bool()
  serverIP = app.Flag("server", "Server address.").Default("127.0.0.1").IP()

  register     = app.Command("register", "Register a new user.")
  registerNick = register.Arg("nick", "Nickname for user.").Required().String()
  registerName = register.Arg("name", "Name of user.").Required().String()

  post        = app.Command("post", "Post a message to a channel.")
  postImage   = post.Flag("image", "Image to post.").File()
  postChannel = post.Arg("channel", "Channel to post to.").Required().String()
  postText    = post.Arg("text", "Text to post.").Strings()
)

func main() {
  switch kingpin.MustParse(app.Parse(os.Args[1:])) {
  // Register user
  case register.FullCommand():
    println(*registerNick)

  // Post message
  case post.FullCommand():
    if *postImage != nil {
    }
    text := strings.Join(*postText, " ")
    println("Post:", text)
  }
}

以及 --帮助 输出:

$ chat --help
usage: chat [<flags>] <command> [<flags>] [<args> ...]

A command-line chat application.

Flags:
  --help              Show help.
  --debug             Enable debug mode.
  --server=127.0.0.1  Server address.

Commands:
  help [<command>]
    Show help for a command.

  register <nick> <name>
    Register a new user.

  post [<flags>] <channel> [<text>]
    Post a message to a channel.

我想你想要的是多科特。我给你介绍一下 to an earlier answer 我张贴了详细信息。