build.gradle

plugins {
    id 'org.spongepowered.plugin' version '0.5.2'
    id 'com.github.johnrengelman.shadow' version '1.2.3' // to package the repository with your project
}
group 'com.example'
version '1.0-SNAPSHOT'
repositories {
    maven {
        url 'https://jitpack.io' // required, used to access the repository
    }
}
configurations {
    compile.extendsFrom shadow // easier than typing the same line twice, once under shadow and once under compile
}
dependencies {
    compile 'org.spongepowered:spongeapi:4.1.0'
    shadow ('com.github.pie-flavor:extradatatranslations:master-SNAPSHOT') { // package the repository
        setTransitive(false) // don't resolve the dependencies (otherwise it'll package SpongeAPI and its subdependencies as well)
    }
}
shadowJar {
    classifier = null
    configurations = [project.configurations.shadow] // otherwise it's compile
}
build.dependsOn(shadowJar) // otherwise you'd have to run shadowJar manually