Root without Wipe topic

Is there a way to root my Nexus 5 without wiping the entire device? I've been looking around and all roads lead to unlocking the boot loader with adb, which wipes the device.

I remember on my GS2 & GS3 I could insert root into stock with just a couple of files, no flashing or adb.

Any help is appreciated.

Sent from my Nexus 5 using XDA Premium 4 mobile app