我知道这个问题是很久以前问过的，但我认为它可能会帮助一些人，谁是谷歌周围(像我)，并点击这个页面。

扇贝看起来也很有希望。

特点(引用自链接的github页面):

标志，单值和多值选项 posix风格的短选项名称(-a)带有分组(-abc) gnu风格的长选项名称(——opt) 属性参数(-Dkey=value， -D key1=value key2=value) 非字符串类型的选项和属性值(带有可扩展转换器) 对尾随参数的强大匹配 子命令

还有一些示例代码(也来自Github页面):

import org.rogach.scallop._;

object Conf extends ScallopConf(List("-c","3","-E","fruit=apple","7.2")) {
  // all options that are applicable to builder (like description, default, etc) 
  // are applicable here as well
  val count:ScallopOption[Int] = opt[Int]("count", descr = "count the trees", required = true)
                .map(1+) // also here work all standard Option methods -
                         // evaluation is deferred to after option construction
  val properties = props[String]('E')
  // types (:ScallopOption[Double]) can be omitted, here just for clarity
  val size:ScallopOption[Double] = trailArg[Double](required = false)
}


// that's it. Completely type-safe and convenient.
Conf.count() should equal (4)
Conf.properties("fruit") should equal (Some("apple"))
Conf.size.get should equal (Some(7.2))
// passing into other functions
def someInternalFunc(conf:Conf.type) {
  conf.count() should equal (4)
}
someInternalFunc(Conf)

我知道这个问题是很久以前问过的，但我认为它可能会帮助一些人，谁是谷歌周围(像我)，并点击这个页面。

扇贝看起来也很有希望。

特点(引用自链接的github页面):

标志，单值和多值选项 posix风格的短选项名称(-a)带有分组(-abc) gnu风格的长选项名称(——opt) 属性参数(-Dkey=value， -D key1=value key2=value) 非字符串类型的选项和属性值(带有可扩展转换器) 对尾随参数的强大匹配 子命令

还有一些示例代码(也来自Github页面):

import org.rogach.scallop._;

object Conf extends ScallopConf(List("-c","3","-E","fruit=apple","7.2")) {
  // all options that are applicable to builder (like description, default, etc) 
  // are applicable here as well
  val count:ScallopOption[Int] = opt[Int]("count", descr = "count the trees", required = true)
                .map(1+) // also here work all standard Option methods -
                         // evaluation is deferred to after option construction
  val properties = props[String]('E')
  // types (:ScallopOption[Double]) can be omitted, here just for clarity
  val size:ScallopOption[Double] = trailArg[Double](required = false)
}


// that's it. Completely type-safe and convenient.
Conf.count() should equal (4)
Conf.properties("fruit") should equal (Some("apple"))
Conf.size.get should equal (Some(7.2))
// passing into other functions
def someInternalFunc(conf:Conf.type) {
  conf.count() should equal (4)
}
someInternalFunc(Conf)

freecli

package freecli
package examples
package command

import java.io.File

import freecli.core.all._
import freecli.config.all._
import freecli.command.all._

object Git extends App {

  case class CommitConfig(all: Boolean, message: String)
  val commitCommand =
    cmd("commit") {
      takesG[CommitConfig] {
        O.help --"help" ::
        flag --"all" -'a' -~ des("Add changes from all known files") ::
        O.string -'m' -~ req -~ des("Commit message")
      } ::
      runs[CommitConfig] { config =>
        if (config.all) {
          println(s"Commited all ${config.message}!")
        } else {
          println(s"Commited ${config.message}!")
        }
      }
    }

  val rmCommand =
    cmd("rm") {
      takesG[File] {
        O.help --"help" ::
        file -~ des("File to remove from git")
      } ::
      runs[File] { f =>
        println(s"Removed file ${f.getAbsolutePath} from git")
      }
    }

  val remoteCommand =
   cmd("remote") {
     takes(O.help --"help") ::
     cmd("add") {
       takesT {
         O.help --"help" ::
         string -~ des("Remote name") ::
         string -~ des("Remote url")
       } ::
       runs[(String, String)] {
         case (s, u) => println(s"Remote $s $u added")
       }
     } ::
     cmd("rm") {
       takesG[String] {
         O.help --"help" ::
         string -~ des("Remote name")
       } ::
       runs[String] { s =>
         println(s"Remote $s removed")
       }
     }
   }

  val git =
    cmd("git", des("Version control system")) {
      takes(help --"help" :: version --"version" -~ value("v1.0")) ::
      commitCommand ::
      rmCommand ::
      remoteCommand
    }

  val res = runCommandOrFail(git)(args).run
}

这将产生以下用法:

使用

还有JCommander(免责声明:我创建了它):

object Main {
  object Args {
    @Parameter(
      names = Array("-f", "--file"),
      description = "File to load. Can be specified multiple times.")
    var file: java.util.List[String] = null
  }

  def main(args: Array[String]): Unit = {
    new JCommander(Args, args.toArray: _*)
    for (filename <- Args.file) {
      val f = new File(filename)
      printf("file: %s\n", f.getName)
    }
  }
}

我从来都不喜欢ruby那样的选项解析器。大多数使用它们的开发人员从来没有为他们的脚本编写合适的手册页，并且由于解析器的原因，最终会以没有以适当的方式组织的数页长的选项结束。

我一直喜欢用Perl的Getopt::Long来做事情。

我正在研究它的scala实现。早期的API看起来是这样的:

def print_version() = () => println("version is 0.2")

def main(args: Array[String]) {
  val (options, remaining) = OptionParser.getOptions(args,
    Map(
      "-f|--flag"       -> 'flag,
      "-s|--string=s"   -> 'string,
      "-i|--int=i"      -> 'int,
      "-f|--float=f"    -> 'double,
      "-p|-procedure=p" -> { () => println("higher order function" }
      "-h=p"            -> { () => print_synopsis() }
      "--help|--man=p"  -> { () => launch_manpage() },
      "--version=p"     -> print_version,
    ))

像这样调用脚本:

$ script hello -f --string=mystring -i 7 --float 3.14 --p --version world -- --nothing

将打印:

higher order function
version is 0.2

并返回:

remaining = Array("hello", "world", "--nothing")

options = Map('flag   -> true,
              'string -> "mystring",
              'int    -> 7,
              'double -> 3.14)

该项目托管在github scala-getoptions中。

另一个库:scarg