build.gradle

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.0'
    }
}

allprojects {
    apply plugin: 'idea'

    group = 'com.micronautics'
    version = '1.3.1'

    apply plugin: 'java'
    apply plugin: 'maven-publish'
    apply plugin: 'com.jfrog.bintray'
    apply plugin: 'maven'
}

subprojects {
    sourceCompatibility = 1.7
    targetCompatibility = 1.7

    dependencies {
        testCompile 'junit:junit:4.7'
    }

    // custom tasks for creating source/javadoc jars
    task sourcesJar(type: Jar, dependsOn: classes) {
        classifier = 'sources'
        from sourceSets.main.allSource
    }

    task javadocJar(type: Jar, dependsOn: javadoc) {
        classifier = 'javadoc'
        from javadoc.destinationDir
    }

    // add javadoc/source jar tasks as artifacts
    artifacts {
        archives sourcesJar, javadocJar
    }

    repositories {
        jcenter()
    }

    publishing {
        publications {
            mavenJava(MavenPublication) {
                if (plugins.hasPlugin('war')) {
                    from components.web
                } else {
                    from components.java
                }

                artifact sourcesJar {
                    classifier "sources"
                }

                artifact javadocJar {
                    classifier "javadoc"
                }
            }
        }
    }

    bintray {
        user = bintrayUser //this usually comes form gradle.properties file in ~/.gradle
        key = bintrayKey //this usually comes form gradle.properties file in ~/.gradle
        publications = ['mavenJava'] // see publications closure
        pkg { //package will be created if does not exist
            repo = 'Java-WebSocket'
            userOrg = 'micronautics' // an optional organization name when the repo belongs to one of the user's orgs
            name = 'Java-WebSocket'
            desc = 'Publishing Java-WebSocket HEAD because that project seems abandoned'
            websiteUrl = 'https://github.com/TooTallNate/Java-WebSocket'
            issueTrackerUrl = 'https://github.com/TooTallNate/Java-WebSocket/issues'
            vcsUrl = 'https://github.com/TooTallNate/Java-WebSocket.git'
            licenses = ['MIT']
            labels = ['WebSocket', 'Java']
        }
    }
}

//task wrapper(type: Wrapper) {
//    gradleVersion = '2.2.1'
//}

output

$ gradle bintrayUpload
:bintrayUpload FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Some problems were found with the configuration of task ':bintrayUpload'.
> No value has been specified for property 'packageName'.
> No value has been specified for property 'user'.
> No value has been specified for property 'apiKey'.
> No value has been specified for property 'repoName'.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.