https://github.com/fancellu/cats-effect-decline-example

Cats effect Decline (Composable command-line parsing for Scala) example
https://github.com/fancellu/cats-effect-decline-example

cats-effect-3 decline refined

Last synced: about 2 months ago
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Cats effect Decline (Composable command-line parsing for Scala) example

• Host: GitHub
• URL: https://github.com/fancellu/cats-effect-decline-example
• Owner: fancellu
• Created: 2022-10-27T15:44:18.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2022-10-27T15:49:03.000Z (over 3 years ago)
• Last Synced: 2025-02-25T10:33:17.251Z (over 1 year ago)
• Topics: cats-effect-3, decline, refined
• Language: Scala
• Homepage:
• Size: 1.95 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
## Cats effect Decline example

### Composable command-line parsing for Scala

https://ben.kirw.in/decline/

## Using in an effectful manner

Just run the below examples, replacing ```com.felstar.HelloWorld``` with ```com.felstar.HelloWorldIO```

### To run

Run it with no params

```

sbt "runMain com.felstar.HelloWorld" 

```

Run it with --help param, displays the help for the app and its params

```

sbt "runMain com.felstar.HelloWorld --help" 

```

Run it with --target param

```

sbt "runMain com.felstar.HelloWorld --target Dino" 

```

Run it with -t short param

```

sbt "runMain com.felstar.HelloWorld -t Ralf" 

```

Run it with positional params

```

sbt "runMain com.felstar.HelloWorld Dave Ralf" 

```

Run it with forbidden name for positional param

```

sbt "runMain com.felstar.HelloWorld John" 

```

Run it with refined number that doesn't match PosInt

```

sbt "runMain com.felstar.HelloWorld --posInt -123" 

```

Run it with unparseable number

```

sbt "runMain com.felstar.HelloWorld --posInt woof" 

```