It would be nice if we could bunlde a compose-desktop app as fat-jar (Jar which contains all depende...

# compose-desktop

[Timo Drick]

It would be nice if we could bunlde a compose-desktop app as fat-jar (Jar which contains all dependency) I know that there is this nativeDistributions support in the compose.desktop plugin. But it generates very complicated install packages (Even for small projects over 100mb). Are there any plans to support this?

[suresh]

Compose is a normal jvm app. You can apply the shadow plugin to create the fat jar.

plugins {
    application
    kotlin("jvm") version "1.4.10"
    id("org.jetbrains.compose") version "0.2.0-build127"
    id("com.github.johnrengelman.shadow") version "6.1.0"
}

...

application {
    mainClass.set("MainKt")
    mainClassName = mainClass.get()
}

[suresh]

$ ./gradlew build 
$ java -jar build/libs/compose-desktop-sample-1.0.0-all.jar

[suresh]

Since they removed compose.desktop.all dependency, i think the fat jar won't be cross platform. You have to build it for each platform

[olonho]

note, that you can manually enumerate all the platforms you want to support

[Timo Drick]

i can not use the application plugin: > Cannot add task 'run' as a task with that name already exists.

[Timo Drick]

But shadowJar works.

[Timo Drick]

But configuration must be done this way:

tasks {
    named<ShadowJar>("shadowJar") {
        archiveBaseName.set(packageName)
        mergeServiceFiles()
        manifest {
            attributes(mapOf("Main-Class" to mainClass))
        }
    }
}

[ckloss]

As far as I know, there is no way to use the plugin application together with the compose.desktop block in the same script. So the error "Cannot add task 'run' ..."

[olonho]

Yep, please file a feature request for fat jar in Compose plugin

[Animesh Sahu]

Though, you can pack native distributions. Last time I checked, the windows package was ~41mb for a simple hello world screen.

[Timo Drick]

Maybe it would also be cool to use something like proguard to strip the unused classes like in Android.

[Animesh Sahu]

@Timo Drick its already quite optimized, it packs JRE, skia library, its JNI binding, and compose itself with your code. JRE is > 50MB iirc, jpackage links only required part of JRE in the executable.

[Animesh Sahu]

Kotlin/Native one should be under 15MB more like 10MB as ~8MB is skia library iirc, which might be implemented in future.