https://github.com/lhns/scala-commandline

Scala command line parser
https://github.com/lhns/scala-commandline

cli commandline parser scala

Last synced: 4 months ago
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Scala command line parser

• Host: GitHub
• URL: https://github.com/lhns/scala-commandline
• Owner: lhns
• License: apache-2.0
• Created: 2020-04-22T14:11:17.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2026-01-06T00:32:02.000Z (6 months ago)
• Last Synced: 2026-01-14T03:51:27.077Z (5 months ago)
• Topics: cli, commandline, parser, scala
• Language: Scala
• Homepage:
• Size: 162 KB
• Stars: 1
• Watchers: 1
• Forks: 1
• Open Issues: 13
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# scala-commandline

[![build](https://github.com/lhns/scala-commandline/actions/workflows/build.yml/badge.svg)](https://github.com/lhns/scala-commandline/actions/workflows/build.yml)

[![Maven Central](https://img.shields.io/maven-central/v/de.lhns/scala-commandline_2.13)](https://search.maven.org/artifact/de.lhns/scala-commandline_2.13)

[![Apache License 2.0](https://img.shields.io/github/license/lhns/scala-commandline.svg?maxAge=3600)](https://www.apache.org/licenses/LICENSE-2.0)

[![Scala Steward badge](https://img.shields.io/badge/Scala_Steward-helping-blue.svg?style=flat&logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA4AAAAQCAMAAAARSr4IAAAAVFBMVEUAAACHjojlOy5NWlrKzcYRKjGFjIbp293YycuLa3pYY2LSqql4f3pCUFTgSjNodYRmcXUsPD/NTTbjRS+2jomhgnzNc223cGvZS0HaSD0XLjbaSjElhIr+AAAAAXRSTlMAQObYZgAAAHlJREFUCNdNyosOwyAIhWHAQS1Vt7a77/3fcxxdmv0xwmckutAR1nkm4ggbyEcg/wWmlGLDAA3oL50xi6fk5ffZ3E2E3QfZDCcCN2YtbEWZt+Drc6u6rlqv7Uk0LdKqqr5rk2UCRXOk0vmQKGfc94nOJyQjouF9H/wCc9gECEYfONoAAAAASUVORK5CYII=)](https://scala-steward.org)

A small state-monad-based command line parser library written in scala.

### build.sbt

```sbt

libraryDependencies += "de.lhns" %% "scala-commandline" % "0.4.0"

```

## Example

```scala

case class Options(help: Boolean,

                   version: Boolean,

                   logLevel: Option[String],

                   decode: Boolean,

                   validate: Boolean,

                   params: Seq[String])

def main(args: Array[String]): Unit = {

  val options: Options = CommandLine(args) {

    for {

      default <- CommandLine.defaultOpts()

      /* shorthand for:

      empty <- CommandLine.isEmpty

      help <- CommandLine.opt("-h", "--help").flag

      version <- CommandLine.opt("--version").flag

      */

      logLevel <- CommandLine.opt("--loglevel").arg.map(_.lastOption)

      decode <- CommandLine.opt("-d", "--decode").flag

      validate <- CommandLine.opt("--validate").flag

      _ <- CommandLine.errorOnUnrecognizedOpts()

      params <- CommandLine.args

    } yield Options(

      help = default.empty || default.help,

      version = default.version,

      logLevel = logLevel,

      decode = decode,

      validate = validate,

      params = params

    )

  }

}

```

## License

This project uses the Apache 2.0 License. See the file called LICENSE.