How do I create an executable fat jar with Gradle with implementation dependencies

Question

I\'ve got a simple project in Gradle 4.6 and would like to make an executable jar of it. I\'ve tried shadow, gradle-fatjar-plugin, gradle-one

Answer 1

Based on the accepted answer, I needed to add one more line of code:

task fatJar(type: Jar) {
  manifest {
    attributes 'Main-Class': 'com.yourpackage.Main'
  }
  archiveClassifier = "all"
  from {
    configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
    configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
    }
  with jar
}

Without this additional line, it omitted my source files and only added the dependencies:

configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }

Answer 2

The same task can be achieved using Gradle Kotlin DSL in a similar way:

val jar by tasks.getting(Jar::class) {
    manifest {
        attributes["Main-Class"] = "com.package.YourClass"
    }

    from(configurations
        .runtime
        // .get() uncomment this on Gradle 6+
        // .files
        .map { if (it.isDirectory) it else zipTree(it) })
}

Answer 3

You can use the following code.

jar {
    manifest {
        attributes(
                'Main-Class': 'com.package.YourClass'
        )
    }
    from {
        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
    }
 }

Be sure to replace com.package.YourClass with the fully qualified class name containing static void main( String args[] ).

This will pack the runtime dependencies. Check the docs if you need more info.

Answer 4

from { configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) } }

This line is essential to me.

Answer 5

Kotlin 1.3.72 & JVM plugin, Gradle 6.5.1

Syntax is changing quickly in all these platforms

tasks {
    compileKotlin {
        kotlinOptions.jvmTarget = "1.8"
    }
    compileTestKotlin {
        kotlinOptions.jvmTarget = "1.8"
    }
    val main = sourceSets.main.get()
    //TODO
    register<Jar>("buildFatJar") {
        group = "app-backend"
        dependsOn(build)
        // shouldRunAfter(parent!!.tasks["prepCopyJsBundleToKtor"]) -> This is for incorporating KotlinJS gradle subproject resulting js file.
        manifest {
            attributes["Main-Class"] = "com.app.app.BackendAppKt"
        }

        from(configurations.compileClasspath.get().files.map { if (it.isDirectory) it else zipTree(it) })
        with(jar.get() as CopySpec)
        archiveBaseName.set("${project.name}-fat")
    }
}