How to detect the current OS from Gradle

Question

I found this answer about how to do it with Groovy:

Detecting the platform (Window or Linux) by Groovy/Grails:

Answer 1

One can differentiate the build environment in between Linux, Unix, Windows and OS X - while the Gradle nativeplatform.platform.OperatingSystem differentiates the target environment (incl. FreeBSD and Solaris).

import org.gradle.internal.os.OperatingSystem

String osName = OperatingSystem.current().getName();
String osVersion = OperatingSystem.current().getVersion();
println "*** $osName $osVersion was detected."

if (OperatingSystem.current().isLinux()) {
    // Consider Linux.
} else if (OperatingSystem.current().isUnix()) {
    // Consider UNIX.
} else if (OperatingSystem.current().isWindows()) {
    // Consider Windows.
} else if (OperatingSystem.current().isMacOsX()) {
    // Consider OS X.
} else {
    // Unknown OS.
}

One can also use an Ant task (source):

import org.apache.tools.ant.taskdefs.condition.Os

task checkWin() << {
    if (Os.isFamily(Os.FAMILY_WINDOWS)) {
        // Consider Windows.
    }
}