# Scala-CLI-tools

**Repository Path**: SuperWindcloud/scala-cli-tools

## Basic Information

- **Project Name**: Scala-CLI-tools
- **Description**: decline是一个可组合的命令行解析库
- **Primary Language**: Unknown
- **License**: MulanPSL-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2024-12-02
- **Last Updated**: 2024-12-02

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# decline


一个可组合的命令行解析器，灵感来自 ['optparse-applicative'][optparse]
并建立在 ['cats'][cats] 之上。


```scala
import cats.syntax.all._
import com.monovore.decline._

object HelloWorld extends CommandApp(
  name = "hello-world",
  header = "Says hello!",
  main = {
    val userOpt =
      Opts.option[String]("target", help = "Person to greet.")
        .withDefault("world")

    val quietOpt = Opts.flag("quiet", help = "Whether to be quiet.").orFalse

    (userOpt, quietOpt).mapN { (user, quiet) => 

      if (quiet) println("...")
      else println(s"Hello $user!")
    }
  }
)
```


## 快速开始

> `libraryDependencies += "com.monovore" %% "decline" % "2.4.2-SNAPSHOT"` 

-  编写示例 , 编译运行
```
$ hello-world --help
Usage: hello-world [--target <string>] [--quiet]

Says hello!

Options and flags:
    --help
        Display this help text.
    --target <string>
        Person to greet.
    --quiet
        Whether to be quiet.

$ hello-world --target friend
Hello, friend!```