"no main manifest attribute" Kotlin, Gradle

[zax71]

Not sure why this error is occurring, I thought it was because the main class wasn't defined in Gradle, but it seems to be defined correctly. My main.kt file and build.gradle.kts are available here.

File Structure:

[Tomasan7]

You need to set main class in the application block. https://docs.gradle.org/current/userguide/application_plugin.html

[zax71]

That didn't seam to fix it

[emortaldev]

https://wiki.minestom.net/setup/your-first-server#build-the-server-jar
which on .kts is equivalent to

tasks {
    named<ShadowJar>("shadowJar") {
        manifest {
            attributes (
                "Main-Class" to "me.zax71.stomKor.MainKt",
                "Multi-Release" to true
            )
        }
    }
}

(Since you're using Kotlin, you have to append "Kt")
btw your package name should be lowercase

[zax71]

I switched to Java for that project now, but i'll mark this as the solution as it seams logical

[ThatOneToast]

I am facing the same issue, and this did not solve it for me.

[ThatOneToast]

Adding the application plugin, and then in your build gradle add

plugins {
    kotlin("jvm") version "2.0.0"
    id("com.github.johnrengelman.shadow") version "8.1.1"
    id("application")
}

application {
    mainClass = "org.example.MainKt"
}

tasks {
    named<ShadowJar>("shadowJar") {
        manifest {
            attributes(
                "Main-Class" to "org.example.MainKt",
                "Multi-Release" to true
            )
        }
    }
}

This solved it for me.