How to script Gradle in order to publish shadowjar into Artifactory

Question

I am using shadowJar in my java project. I would like to push the outcome into artifactory.

My gradle script look like this, I am not sure how to connect the dots:

Answer 1

You can just use this:

build.gradle.kts

plugins {
    kotlin("jvm")
    `maven-publish`
    id("com.github.johnrengelman.shadow") version "6.0.0"
}

publishing {
    publications {
        val publication = create<MavenPublication>("shadow")
        project.shadow.component(publication)
    }
}

Answer 2

Have you looked at the Artifactory Gradle Plugin? This can help you with what you need, resolving and deploying artifacts from and to Artifactory.

You can publish using the plugin by omitting the 'artifactory' plugin from a project that does not publish anything. Note that this does not apply to the root project that contains the convention object, and so, requires the plugin to be applied. Activate the corresponding artifactoryPublish Gradle task manually for each project to which you wish to apply the plugin. For example in our Gradle project example you can run: ./gradlew clean api:artifactoryPublish shared:artifactoryPublish

Answer 3

Here is what I did to get Gradle to publish to our Nexus repo using the shadow plugin and the maven-publish plugin: (run publish task: "gradle publish")

plugins {
    id 'com.github.johnrengelman.shadow' version '1.2.4'
}

apply plugin: 'maven-publish'

publishing {
    publications {
        shadow(MavenPublication) {
            from components.shadow
            groupId 'myGroupId'
            artifactId 'myArtifactId'
        }
    }
    repositories {
        maven {
            url "http://nexus.mycompany.com/repository/stuff"
            credentials {
                username = "${System.env.NEXUS_USERNAME}"
                password = "${System.env.NEXUS_PASSWORD}"
            }
        }
    }
}

Answer 4

None of the other answers take multimodule projects into consideration. For a multimodule project, no one configures publication for every single module; instead, it's done in the root build file.

Also, in a multimodule project, usually only one module needs to be shadowed as an executable JAR. It makes no sense to apply the shadow plugin to every module.

Here's how to achieve all of the above using Kotlin DSL:

In the subproject:

plugins {
    id("com.github.johnrengelman.shadow")
}
...
project.tasks.findByName("jar")?.enabled = false

tasks.withType<com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar> {
    mergeServiceFiles()
    archiveClassifier.set("")
    manifest {
        attributes(mapOf("Main-Class" to "com.mycompany.MainClass"))
    }
}

In the root project:

publications {
    create<MavenPublication>("maven") {
        afterEvaluate {
            val shadowJar = tasks.findByName("shadowJar")
            if (shadowJar == null) from(components["java"])
            else artifact(shadowJar)
        }
        artifact(kdocJar)
        artifact(sourcesJar)
    }
    ...
}

The key is the afterEvaluate configuration. See this for details.

The project.shadow.component(publication) everyone keeps talking about doesn't exist in the root project and will not compile in a Kotlin DSL. It's the ShadowExtension that only exists in the project where the plugin is applied.

Answer 5

The publication section determines what you're publishing using the maven-publish plugin.

In your current config, from components.java is going to publish the default jar artifact of your project and artifact sourceJar publishes the sourceJar. In order to publish a different jar, you need to modify (or add a new) publication.

shadowJar {
  baseName = 'myproject-shadow'
  classifier = ''
}

publishing {
  publications {
    shadow(MavenPublication) {
      from components.shadow
      artifactId = 'myproject-shadow'
    }
  }
}

The version used in the name of the jar comes from project.version.

Answer 6

The API has changed in the shadow plugin, this works for me with com.github.jengelman.gradle.plugins:shadow:2.0.1: http://imperceptiblethoughts.com/shadow/#publishing_shadow_jars

5. Publishing Shadow JARs
5.1. Publishing with Maven-Publish Plugin
The Shadow plugin will automatically configure the necessary tasks 
in the presence of Gradle’s maven-publish plugin. The plugin provides
the component method from the shadow extension to configure the 
publication with the necessary artifact and dependencies in the 
POM file.

Publishing a Shadow JAR with the Maven-Publish Plugin
apply plugin: 'java'
apply plugin: 'maven-publish'
apply plugin: 'com.github.johnrengelman.shadow'

publishing {
  publications {
    shadow(MavenPublication) { publication ->
      project.shadow.component(publication)
    }
  }
  repositories {
    maven {
      url "http://repo.myorg.com"
    }
  }
}