Autowiring with tasks

build.gradle

task analyzeTestJar(type: AnalyzeJar) {
    jar = testJar
}

task copy(type:Copy) {
    from testJar
    into 'build/myJars'
}

class AnalyzeJar extends DefaultTask {
    Task jar

    AnalyzeJar() {
        inputs.files { jar.outputs.files }
    }

    @TaskAction
    def analyze() {
        println "Size: ${jar.archivePath.size()}"
        project.exec {
            commandLine "unzip", "-t", jar.archivePath
        }
    }
}