detectOS with gradle

build.gradle

import org.gradle.internal.os.OperatingSystem;

task detect {
    doLast {
        println("Groovy/Java says the current OS is " + System.getProperty("os.name"));
        println("Gradle says the current OS is " + OperatingSystem.current())
        println("Is this Linux? " + (OperatingSystem.current().isLinux() ? "Yup" : "Nah"))
        println("Is this Mac OS X? " + (OperatingSystem.current().isMacOsX() ? "Yup" : "Nah"))
        println("Is this Windows? " + (OperatingSystem.current().isWindows() ? "Yup" : "Nah"))
    }
}