Gradle init script that adds `depsize` task that will display the size of each dependencies.

java-dep-size-init.gradle.kts

/*
 * Registers tasks to get the dependency size
 */


fun listConfigurationDependencies(configuration: Configuration ) {
    val multiplier = 1024.0
    val formatStr = "%,10.2f"

    val size = configuration.map { it.length() / (multiplier * multiplier) }.sum()

    val out = StringBuffer()
    out.append("\nConfiguration name: \"${configuration.name}\"\n")
    if (size > 0) {
        out.append("Total dependencies size:".padEnd(65))
        out.append("${String.format(formatStr, size)} Mb\n\n")

        configuration.sortedBy { -it.length() }
            .forEach {
                out.append(it.name.padEnd(65))
                out.append("${String.format(formatStr, (it.length() / multiplier))} kb\n")
            }
    } else {
        out.append("No dependencies found")
    }
    println(out)
}

allprojects { // this is Project
    plugins.withType(JavaPlugin::class.java) {
        // println("applied java ${name}")

        tasks.register("depsize") {
            group = "help"
            description = "Prints dependencies for \"runtimeClasspath\" configuration"
            // TODO allow to pass configuration name as parameter (compileClasspath)
            doLast {
                listConfigurationDependencies(configurations["runtimeClasspath"])
            }
        }
        tasks.register("depsize-all-configurations") {
            group = "help"
            description = "Prints dependencies for all available configurations"
            doLast {
                configurations
                    .filter { it.isCanBeResolved }
                    .forEach { listConfigurationDependencies(it) }
            }
        }
    }
}