Use gradle to upload jar to local Maven repository

Question

This question has been asked several times, but somehow I don't get this to work. Gradle is a great tool, but its documentation is anything but great. No examples make it almost impossible to understand for someone who doesn't use it on a daily basis.

I am using Android Studio and I want to upload my module output jar to my local Maven repository.

apply plugin: 'java'

dependencies {
    compile 'com.google.http-client:google-http-client-android:1.18.0-rc'
}


apply plugin: 'maven'
configure(install.repositories.mavenInstaller) {
    pom.project {
        groupId 'com.example'
        artifactId 'example'
        packaging 'jar'
    }
}

When I start a build in Android Studio, I can see on the Gradle tab that

:install

is invoked. I also get a new jar in my build folder, but that jar is not uploaded to Maven. [The Maven repo exists and the Google appengine gradle plugin uploads its jar from another module of the same project just fine.]

What am I missing?

Answer 1

I suspect the problem is that you are only editing the POM (via pom.project), instead of configuring the actual Maven coordinates used for installation. Try the following instead:

// best way to set group ID
group = 'com.example'

install {
    repositories.mavenInstaller {
        // only necessary if artifact ID diverges from project name
        // the latter defaults to project directory name and can be
        // configured in settings.gradle
        pom.artifactId = 'myName' 
        // shouldn't be needed as this is the default anyway
        pom.packaging = 'jar'
    }
}

PS: The samples directory in the full Gradle distribution contains many example builds, also for the maven plugin.