Creating fat JARs using the Ktor Gradle plugin

Configure the Ktor plugin

To build a fat JAR, you need to configure the Ktor plugin first:

1. Open the build.gradle.kts file and add the plugin to the plugins block:

   plugins { id("io.ktor.plugin") version "2.3.12" }

2. Make sure the main application class is configured:

   application { mainClass.set("com.example.ApplicationKt") }

3. Optionally, you can configure the name of the fat JAR to be generated using the ktor.fatJar extension:

   ktor { fatJar { archiveFileName.set("fat.jar") } }

Build and run a fat JAR

The Ktor plugin provides the following tasks for creating and running fat JARs:

• buildFatJar: builds a combined JAR of a project and runtime dependencies. You should see the ***-all.jar file in the build/libs directory when this build completes.

• runFatJar: builds a fat JAR of a project and runs it.