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I have a gradle ant task that starts a H2 database. The build script looks like this:

apply plugin: 'java'

repositories 
 mavenCentral()


dependencies 
 runtime 'com.h2database:h2:1.3.168'


task startH2Db 
 group = 'database'
 description='Starts the H2 TCP database server on port 9092 and web admin on port 8082'
 doLast
 ant.java( fork:true, spawn:true, classname:'org.h2.tools.Server', dir:projectDir)
 arg(value: "-tcp")
 arg(value: "-web")
 arg(value: "-tcpPort")
 arg(value: "9092")
 arg(value: "-webPort")
 arg(value: "8082")
 arg(value: "-webAllowOthers")
 classpath 
 pathelement(path:"$sourceSets.main.runtimeClasspath.asPath")
 
 
 

Given that Gradle are now supporting Kotlin, I decided to try and convert this build.gradle into a build.gradle.ktsfile.

I'm struggling to find documentation on how to do this in Kotlin. I've found examples of other ant tasks, but nothing with args like above. I have got as far as this:

plugins 
 java


repositories 
 mavenCentral()


dependencies 
 runtime ("com.h2database:h2:1.3.168")


tasks 
 register("startH2Database") 
 group = "database"
 description = "Starts the H2 TCP database server on port 9092 and web admin on port 8082"
 doLast 
 ant.withGroovyBuilder 
 "java"("fork" to true, "spawn" to true, "classname" to "org.h2.tools.Server", "dir" to projectDir)
 
 
 

How do I configure the args and the classpath? Is there any extra documentation other than what's listed here: https://docs.gradle.org/current/userguide/ant.html?

You may check more examples in the Gradle Kotlin DSL repository, e.g.
https://github.com/gradle/kotlin-dsl/blob/master/samples/ant/build.gradle.kts

So your Ant call may look like

ant.withGroovyBuilder 
 "java"( 
 "fork" to true, 
 "spawn" to true, 
 "classname" to "org.h2.tools.Server", 
 "dir" to projectDir
 )
 "arg"("value" to "-tcp")
 "arg"("value" to "-web")
 "arg"("value" to "-tcpPort")
 "arg"("value" to "9092")
 "arg"("value" to "-webPort")
 "arg"("value" to "8082")
 "arg"("value" to "-webAllowOthers")
 "classpath" 
 "pathelement"(
 "path" to configurations["runtime"].asPath
 )