Hi, I have a multiplatfrom application project setup with `jvm()` as one of the targets. When I run ...

# multiplatform

[andrewreitz]

Hi, I have a multiplatfrom application project setup with jvm() as one of the targets. When I run gradlew tasks I don’t see any way to execute the jvm project. I see the other run tasks for native and js, is there something I need to do to setup the jvm one to be executable?

[Big Chungus]

Add application plugin and you'll get run task

[andrewreitz]

that adds a run task but doesn’t seem to be setup correctly. Doesn’t appear to build the jvm code or know where the compiled class files are

[andrewreitz]

is there extra setup that needs to be done for the application plugin?

[Big Chungus]

You also need to set your main class

[Big Chungus]

Or you can do it without a plugin https://www.github.com/mpetuska/kamp/tree/master/app%2Fbuild.gradle.kts

[andrewreitz]

I set the main class. That’s where it fails saying that class isn’t generated

[Big Chungus]

How do you set it?

[Big Chungus]

You also need withJava() in jvm block to make this work with the plugin

[andrewreitz]

Oh, that’s what I’m missing

[Big Chungus]

No idea why, but it refuses to work without it

[andrewreitz]

what’s tgis?

[Big Chungus]

Typo

[andrewreitz]

I was looking through the source and saw that function I assumed it automatically ran that when using jvm() guess not

[Big Chungus]

That dsl enables src/jvmMain/java

[andrewreitz]

just having jvm was working https://github.com/AndrewReitz/kotlin-multiplatform-ray-tracer/blob/master/raytracer-console/console.gradle.kts

[andrewreitz]

made a separate module just to run the jvm code though 😞

Would like to have it all in one.

[Big Chungus]

Do it manually as I've linked above

[Big Chungus]

Or get it working with application plugin. Both work fine with multiplatform plugin

[andrewreitz]

jvm {
  withJava()
}

is all I should need to add?

[Big Chungus]

No, you also need to add application plugin and set main class properly

[andrewreitz]

yeah I did that

[Big Chungus]

How do you set main class?

[andrewreitz]

application {
  mainClass.set("raytracer.console.MainKt")
}

[andrewreitz]

application doesn’t trigger a build
there are no compiled class files in the build folder

[andrewreitz]

So I get

Error: Could not find or load main class raytracer.console.MainKt
Caused by: java.lang.ClassNotFoundException: raytracer.console.MainKt

[Big Chungus]

It should, it triggered everything fone the last time I've used it

[andrewreitz]

🤷 last time I tried adding the application plugin broke everything

[Big Chungus]

Where does your main file lie? Send me relative path from gradle file

[andrewreitz]

src/commonMain/kotlin/raytracer/console/main.kt

[andrewreitz]

It’s all in this repo https://github.com/AndrewReitz/kotlin-multiplatform-ray-tracer/blob/master/raytracer-console/src/commonMain/kotlin/raytracer/console/main.kt
if that helps at all

[Big Chungus]

I dunno, should work. Anyways, just write your own jvm exec task as I've done above

[Big Chungus]

And drop application plugin

[andrewreitz]

ok thanks for the help