Good day, I try to build .jar file for my server code to launch it on the virtual machine. Jar, built as artifact is launched with error

java -jar server.jar 
Exception in thread "main" java.lang.NoClassDefFoundError: kotlin/jvm/internal/Intrinsics
...

I googled, that the problem is in kotlin library, which should be packed into the jar in a specific way. Documentation here https://www.jetbrains.com/help/idea/create-your-first-kotlin-app.html?section=Gradle%20Groovy tells me, that I should add special code in build.gradle. There is my code on the picture. As you can see, "from" is grey... And I get next error for Gradle

* Exception is:
org.gradle.api.GradleScriptException: A problem occurred evaluating root project 'server'.
<131 internal calls>
Caused by: org.gradle.internal.metaobject.AbstractDynamicObject$CustomMessageMissingMethodException: Could not find method jar() for arguments [build_c5anurhkrrlxlaf3i7moe4k0u$_run_closure5@7f80db22] on task set of type org.gradle.api.internal.tasks.DefaultTaskContainer.
	at org.gradle.internal.metaobject.AbstractDynamicObject.methodMissingException(AbstractDynamicObject.java:182)
	at org.gradle.internal.metaobject.AbstractDynamicObject.invokeMethod(AbstractDynamicObject.java:166)
	at org.gradle.api.internal.tasks.DefaultTaskContainer_Decorated.invokeMethod(Unknown Source)
	at build_c5anurhkrrlxlaf3i7moe4k0u.run(/Users/stask/projects/motionLearning/chat/kotlinServer/server/build.gradle:100)
	at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:91)
	... 130 more

Could you help me, how to fix the build?

I strongly recommend not building a fat jar due to many reasons, some of them being that they are a bad practice abuse of Java functionality that can easily be done wrongly and in some cases even cannot work properly. Instead you should use the Gradle

application

plugin to build a proper distribution archive with everything you need (your code, your libs, generated start scripts for Windows and *nix, ...) by just applying one plugin and setting one propertyk https://docs.gradle.org/current/userguide/application_plugin.html

Thank you, it is a usefull link. I started to understand building process.

If you want the start scripts in

out/bin

in the final archive, then yes

In fact nothing was produced. I has default kotlin multiplatform build.gradle script, The folder remains empty

Ah, sorry, didn't think the multiplatform plugin is made so incompatible with the

application

plugin. To build a proper distribution with the

application

plugin you indeed need a little bit more boilerplate. But I would still prefer that anytime over building a fat jar. I just tried and this should work fine:

application {
    mainClass = 'broccole.Server'
}

def runtimeClasspath = files()
runtimeClasspath.from(configurations.jvmRuntimeClasspath)
runtimeClasspath.from(jvmJar)

run {
    classpath = runtimeClasspath
}

startScripts {
    classpath = runtimeClasspath
}

distributions {
    main {
        contents {
            into('lib') {
                from(runtimeClasspath)
            }
        }
    }
}

It fixes up the

run

task, the

startScripts

generation task and the distribution copy spec and thus the

installDist

,

distZip

and

distTar

tasks.

@Vampire thank you, I will try your solution and write feedback here.