Getting version name, and version code from env variables

build.gradle

private static String getVersionName() {
    String versionName = "$System.env.ANDROID_VERSION_NAME"
    if (versionName == null || versionName.isEmpty()) {
        int versionCode = getVersionCode()
        return "1.0.$versionCode"
    } else {
        return versionName
    }
}

...

private static int getVersionCode() {
    try {
        return Integer.parseInt("$System.env.ANDROID_VERSION_CODE")
    } catch (NumberFormatException numberFormatException) {
        println(numberFormatException.message)
        return 0
    }
}