I love vim keybindings. For older versions of Magit, I used this to allow j/k scrolling:
(define-key magit-status-mode-map (kbd "k") #'previous-line)
(define-key magit-status-mode-map (kbd "K") #'magit-discard-item)
(define-key magit-status-mode-map (kbd "j") #'next-line)
But now, of course, the keymaps have changed. I have a sort of hacked up solution that loops through all the keymaps, but it's quite complicated and brittle.
Is there any easy way to customize keybindings in magit?
I have the same issue (and I am the maintainer :-), and I'm afraid there's no completely trivial fix. (I don't use vim bindings, but I use C-{jikl} for character/line navigation, and in Magit i and k to go up/down a section.
To reproduce your old customizations you could do this:
(define-key magit-mode-map (kbd "k") #'previous-line)
(define-key magit-mode-map (kbd "K") #'magit-discard)
(define-key magit-mode-map (kbd "j") #'next-line)
And then search for "k" (M-x rgrep RET "K" RET *.el RET). Finally add for each found match:
(define-key KEYMAP (kbd "k") #'previous-line)
(define-key KEYMAP (kbd "K") COMMAND)
