Check connected devices before adding genymotion configuration

build-hasDevicesPlugged.gradle

/**
This Gist shows how to check the presence of connected devices before applying another .gradle file.
It has been tested with Android Gradle Plugin from 1.2.0 to 1.5.0.
*/

apply plugin: 'com.android.application'

android {
  Your app config...
}

/**
 * This method returns whether a device is plugged or not to adb.
 * It also prints the list of connected devices when there is.
 * @param project the current Gradle project
 * @return returns true is there is at least one device plugged or false otherwise
 */
boolean hasDevicesPlugged(Project project) {
    //Partially extracted from: https://android.googlesource.com/platform/tools/build/+/925c0b5cf8730105dd5aa8c851141d5688d07789/gradle/src/main/groovy/com/android/build/gradle/internal/tasks/TestFlavorTask.groovy#156
    AndroidDebugBridge.initIfNeeded(false /*clientSupport*/)
    AndroidDebugBridge bridge = AndroidDebugBridge.createBridge(project.android.getAdbExe().absolutePath, false /*forceNewBridge*/)
    long timeOut = 30000 // 30 sec
    int sleepTime = 1000
    while (!bridge.hasInitialDeviceList() && timeOut > 0) {
        sleep(sleepTime)
        timeOut -= sleepTime
    }
    if (timeOut <= 0 && !bridge.hasInitialDeviceList()) {
        throw new BuildException("Timeout getting device list.", null)
    }

    if (bridge.devices.size() < 1) {
        return false
    }

    println "Devices found:"
    for (IDevice device : bridge.devices) {
        println device.name
    }
    return true
}

if(hasDevicesPlugged(project)) {
    // import your gradle script according to your needs
    apply from: "genymotion.gradle"
}