Scala Yaml is a dependency-free Scala library that allows you to work with YAML.
The goal of this project is to create an idiomatic library which:
- provides compile time type safety
- semiautomatically derives codec instances
- has explicit error handling and helpful error messages
- cross compiles to Scala.js and Scala Native (waiting for Scala 3 support in SN)
Please see the guide for more information
Take part in our discussions, post your ideas, vote for feature requests, and have a real impact on how our next milestone will look like!
Add as a dependency:
- via sbt
libraryDependencies += "org.virtuslab" %% "scala-yaml" % "<version>"- via scala-cli
//> using dep org.virtuslab::scala-yaml:<version>and use it in your code!
import org.virtuslab.yaml.*
case class Address(city: String, zipcode: String) derives YamlCodec
case class Person(name: String, age: Int, address: Address) derives YamlCodec
val yaml = s"""name: John Wick
|age: 40
|address:
| city: Anywhere
| zipcode: 12-345
|""".stripMargin
val decoded = yaml.as[Person]
// Either[YamlError, Person] = Right(Person(John Wick,40,Address(Anywhere,12-345)))
case class Activity(kind: String, distance: Seq[Double]) derives YamlCodec
val activity = Activity("running", Seq(5.37, 4.98, 5.73))
val encoded = activity.asYaml
//kind: running
//distance:
// - 5.37
// - 4.98
// - 5.73