Introduction: Auto-generate Kotlin DSL
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Auto-generates DSL (Domain Specific Language) for your Kotlin projects using annotations.

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Table of Contents

  1. Documentation
  2. Download

Create expressive, immutable and type-safe DSL without boilerplate code:

person {
    name = "Juan"
    age = 34
    newAddress {
        street = "200 Celebration Bv"
        zipCode = 34747
        location {
            lat = 100.0
            lng = 100.0
    friends {
        +person {
            name = "Arturo"
            age = 28
        +person {
            name = "Tiwa"
            age = 30

To generate the previous DSL you just need to provide your desired classes with @AutoDsl:

class Person(
    val name: String,
    val age: Int,
    val address: Address?,
    val friends: List<Person>?

@AutoDsl("newAddress") // set custom name for DSL
data class Address(      // can be used in data classes
    val street: String,
    val zipCode: Int,
    val location: Location?

class Location {
    val lat: Double
    val lng: Double

    constructor() {
        lat = 0.0
        lng = 0.0

    // in multiple constructors you can specify which one to use.
    constructor(lat: Double, lng: Double) { = lat
        this.lng = lng

AutoDsl will be generating a builder class and extension function for the annotated class providing this super expressive DSL.

For required parameters like name the DSL will throw an exception at runtime indicating exactly which field is missed. To make it optional just set the property as nullable with the question mark like friends. The value will be null in case it's not set.

Note: Default parameters in constructor is not currently supported as there is no way to get that value in the process to generate the code. There is a workaround that you can use explained in the wiki page.


Visit the Wiki for a full list of features and more details: AutoDsl-Wiki

For more Examples


Add repository:
repositories {
    maven { url "" }
Add the dependencies
dependencies {
    api "com.juanchosaravia.autodsl:annotation:latest_version"
    kapt "com.juanchosaravia.autodsl:processor:latest_version"

Pending Features

  • Support external builders with new annotation @ManualDsl(type=MyBuilder::class).
  • Custom names for builders to improve integration with Java.


If you want to debug the processor do the following steps:

  1. Run this command:
     ./gradlew clean :app:build --no-daemon -Dorg.gradle.debug=true -Dkotlin.compiler.execution.strategy="in-process" -Dkotlin.daemon.jvm.options="-Xdebug,-Xrunjdwp:transport=dt_socket\,address=5005\,server=y\,suspend=n"
  2. In IntelliJ Idea go to Tools > Edit Configurations > press "+" icon in the left top corner. Add a new "Remote". Set a Name and check the "Single instance only" flag to true.
  3. Press "Debug" button to run the newly created "Remote" configuration.


  • Update version in release-brintray.gradle file:
    libraryVersion = 'x.y.z'
  • Setup bintray user and pass in
  • Run:
    ./gradlew :annotation:bintrayUpload
    ./gradlew :processor:bintrayUpload


Copyright 2018 Juan Ignacio Saravia

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.  
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