Emacs Relative Line Numbering

I use both vim and Emacs because I grew up using a lot of vim then decided to switch over to Emacs one day. The obvious choice was to switch to using Evil Mode. This post is not about that, at least not entirely. One of the things I missed dearly about vim was the ease with which you could use line numbers to move around and edit. I always found C-u preface very crufty. The implicit numeric argument that precedes a command is what makes you super fast with navigation in vim. However, I had come to like love Emacs to go back. So I copied took inspiration and wrote some ELisp code from the Internet and modified it to achieve the exact result I wanted. This is something that works out of the box on my Emacs - 26.1

Demo

Code

Throw this in your .emacs and watch the magic!

(defvar my-linum-current-line-number 0)

(setq linum-format 'my-linum-relative-line-numbers)

(defun my-linum-relative-line-numbers (line-number)
  (let ((test2 (- line-number my-linum-current-line-number)))
    (propertize
     (number-to-string (cond ((<= test2 0) (* -1 test2))
                             ((> test2 0) test2)))
     'face 'linum)))

(defadvice linum-update (around my-linum-update)
  (let ((my-linum-current-line-number (line-number-at-pos)))
    ad-do-it))
(ad-activate 'linum-update)

(global-linum-mode t)