circe / circe-config

Yet another Typesafe config Scala wrapper powered by circe

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Small library for translating between HOCON, Java properties, and JSON documents and circe's JSON AST.

At a high-level it can be used as a circe powered front-end for the Typesafe config library to enable boilerplate free loading of settings into Scala types. More generally it provides parsers and printers for interoperating with Typesafe config's JSON AST.


To use this library configure your sbt project with the following line:

libraryDependencies += "io.circe" %% "circe-config" % "0.4.1"



scala> import com.typesafe.config.{ ConfigFactory, ConfigMemorySize }
scala> import
scala> import io.circe.config.syntax._
scala> import scala.concurrent.duration.FiniteDuration

scala> case class ServerSettings(host: String, port: Int, timeout: FiniteDuration, maxUpload: ConfigMemorySize)
scala> case class HttpSettings(server: ServerSettings, version: Option[Double])
scala> case class AppSettings(http: HttpSettings)

scala> val config = ConfigFactory.load()

res0: Either[io.circe.Error,ServerSettings] = Right(ServerSettings(localhost,8080,5 seconds,ConfigMemorySize(5242880)))

res1: Either[io.circe.Error,HttpSettings] = Right(HttpSettings(ServerSettings(localhost,8080,5 seconds,ConfigMemorySize(5242880)),Some(1.1)))

res2: Either[io.circe.Error,AppSettings] = Right(AppSettings(HttpSettings(ServerSettings(localhost,8080,5 seconds,ConfigMemorySize(5242880)),Some(1.1))))

Based on this application.conf.


Contributions are very welcome. Please see instructions on how to create issues and submit patches.


To release version x.y.z run:

> sbt -Dproject.version=x.y.z release


circe-config is licensed under the Apache License, Version 2.0 (the "License"); you may not use this software except in compliance with the License.

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.