How to configure spring-boot repackage with gradle-script-kotlin

Question

With regular gradle I would configure a main class like so:

bootRepackage {
    mainClass = 'demo.Application'
}

With gradle-script-kotlin, this does not work.
I think I need to somehow use the Project.configure inline function, but I have tried a few different things and I haven’t been able to make it work.

Show your main class. Possible your class is ApplicationKt. — Ruslan
– Ruslan, Commented Sep 22, 2016 at 10:41
I have multiple main classes, which is part of the reason I need to configure it, if you have only one main class it gets discovered anyway. No the problem isn't the class name, the above wont even compile let alone be evaluated. — Magnus
– Magnus, Commented Sep 22, 2016 at 12:11
I have tried about 6 different ways of configuring the plugin all yielding various errors, I didnt include them in the question because I wanted to keep it concise and targeted to question at hand. Im not trying to solve an error, im trying to discover the proper way of doing it. — Magnus
– Magnus, Commented Sep 22, 2016 at 23:12
Okay, then please checkout this project: github.com/IRus/kotlin-meetup — Ruslan
– Ruslan, Commented Sep 23, 2016 at 10:02

mkobit · Accepted Answer · 2017-09-09 01:52:49Z

2

Update - September 8th, 2017

In newer versions of the Kotlin support, you have a couple other more idiomatic ways to accomplish this:

tasks {
  "bootRepackage"(Repackage::class) {
    mainClass = "demo.Application"
  }
}

And also:

val bootRepackage by tasks.getting(Repackage::class) {
  mainClass = "demo.Application"
}

I'm sure the task will change in a new version of Spring Boot.

bootRepackage is a task of type org.springframework.boot.gradle.repackage.RepackageTask. With 0.4.1, there are no extension methods available to make this configuration obvious. You will have to do something like the following:

import org.springframework.boot.gradle.repackage.RepackageTask

(tasks.getByName("bootRepackage") as RepackageTask).apply {
  mainClass = "demo.Application"
}

Relevant open issues for Task configuration:

#34 - Support task selection and configuration

edited Sep 9, 2017 at 1:52

answered Dec 10, 2016 at 16:11

mkobit

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