No-arg compiler plugin

Gradle

Add the plugin and specify the list of annotations that must lead to generating a no-arg constructor for the annotated classes.

buildscript { dependencies { classpath "org.jetbrains.kotlin:kotlin-noarg:$kotlin_version" } } apply plugin: "kotlin-noarg" 

Or using the Gradle plugins DSL:

plugins { id "org.jetbrains.kotlin.plugin.noarg" version "1.6.0" } 

Then specify the list of no-arg annotations:

noArg { annotation("com.my.Annotation") } 

Enable invokeInitializers option if you want the plugin to run the initialization logic from the synthetic constructor. By default, it is disabled.

noArg { invokeInitializers = true } 

Maven

<plugin> <artifactId>kotlin-maven-plugin</artifactId> <groupId>org.jetbrains.kotlin</groupId> <version>${kotlin.version}</version> <configuration> <compilerPlugins> <!-- Or "jpa" for JPA support --> <plugin>no-arg</plugin> </compilerPlugins> <pluginOptions> <option>no-arg:annotation=com.my.Annotation</option> <!-- Call instance initializers in the synthetic constructor --> <!-- <option>no-arg:invokeInitializers=true</option> --> </pluginOptions> </configuration> <dependencies> <dependency> <groupId>org.jetbrains.kotlin</groupId> <artifactId>kotlin-maven-noarg</artifactId> <version>${kotlin.version}</version> </dependency> </dependencies> </plugin> 

JPA support

As with the kotlin-spring plugin wrapped on top of all-open, kotlin-jpa is wrapped on top of no-arg. The plugin specifies @Entity, @Embeddable, and @MappedSuperclass no-arg annotations automatically.

That's how you add the plugin in Gradle:

buildscript { dependencies { classpath "org.jetbrains.kotlin:kotlin-noarg:$kotlin_version" } } apply plugin: "kotlin-jpa" 

Or using the Gradle plugins DSL:

plugins { id "org.jetbrains.kotlin.plugin.jpa" version "1.6.0" } 

In Maven, enable the jpa plugin:

<compilerPlugins> <plugin>jpa</plugin> </compilerPlugins> 

Command-line compiler

Add the plugin JAR file to the compiler plugin classpath and specify annotations or presets:

-Xplugin=$KOTLIN_HOME/lib/noarg-compiler-plugin.jar -P plugin:org.jetbrains.kotlin.noarg:annotation=com.my.Annotation -P plugin:org.jetbrains.kotlin.noarg:preset=jpa