fatjar with gradle and shadowjar

[ash.ta]

hi,

i'm struggling with a gradle build in attempt to build a fatjar.

following some examples i've found, i created the following gradle.build:

import com.github.jengelman.gradle.plugins.shadow.transformers.AppendingTransformer

apply plugin: "java"
apply plugin: "scala"
apply plugin: "com.github.johnrengelman.shadow"

sourceCompatibility = 1.8
version = '0.0.1'

if (!JavaVersion.current().java8Compatible) {
    throw new IllegalStateException("Java 8 is mandatory for building this project")
}

repositories {
    mavenCentral()
    jcenter()
}

buildscript {
    repositories {
        jcenter {
            url "http://jcenter.bintray.com/"
        }
    }
    dependencies {
        classpath 'com.github.jengelman.gradle.plugins:shadow:1.2.2'
    }
}

dependencies {

    compile("com.typesafe.akka:akka-actor_2.11:2.4.1")
    compile("com.typesafe.akka:akka-cluster_2.11:2.4.1")
    compile("com.typesafe.akka:akka-cluster-tools_2.11:2.4.1")
    compile("com.typesafe.akka:akka-http-experimental_2.11:2.0.1")
    compile("com.typesafe.akka:akka-http-core-experimental_2.11:2.0.1")
    compile("org.scala-lang:scala-library:2.11.7")

    testCompile("junit:junit:4.11")
}

tasks.withType(ScalaCompile) {
    scalaCompileOptions.useAnt = false
}

task wrapper(type: Wrapper) {
    gradleVersion = '2.9'
}
jar {
    manifest {
        attributes "Main-Class": "com.whatever.Main"
        attributes "Build-Version": version 
    }
    from {
        configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
    }
    archiveName 'fat.jar'
}

shadowJar {
    transform(AppendingTransformer) {
        resource = 'reference.conf'
    }
}

 unfortunately, i still fail to run created jar due to the following error:

Exception in thread "main" com.typesafe.config.ConfigException$Missing: No configuration setting found for key 'akka.version'

does anyone have an idea what do i miss here?

thanks!

[Viktor Klang]

Hi Ash,

It's situations like these Google Groups shine since they are searchable: https://groups.google.com/forum/#!searchin/akka-user/%22No$20configuration$20setting$20found$20for$20key%22%7Csort:date

Also, the Akka Documentation has a lot of effort put into it, and is a great source of information:

http://doc.akka.io/docs/akka/2.4.1/general/configuration.html#When_using_JarJar__OneJar__Assembly_or_any_jar-bundler

Please let us know if you didn't find the answer in there,

Happy hAkking!

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[ash.ta]

hey,

thanks for the tips. 

i guess i understand what's wrong now: while shadowJar plugin is mentioned as the one that should do the job of merging reference.conf files, it doesn't happen with the build script i run.

i get a jar full of different reference.confs. therefore i think the problem is with the script itself.

thanks