add "r o" and "d o" to magit: diff and rebase with origin/master

magit-origin-master.el

;;; Define "r o" (an "o" suffix) for "magit rebase onto origin/master"
(require 'magit)
(transient-define-suffix as-magit-rebase-onto-origin-master (args)
  "Rebase the current branch onto origin/master.

TODO(ariels): Make it better and also document it."
  :if 'magit-get-current-branch
  :description "origin/master"
  (interactive (list (magit-rebase-arguments)))
  (magit-git-rebase "origin/master" args))

(transient-insert-suffix 'magit-rebase "p"
  (list "o" #'as-magit-rebase-onto-origin-master))

(transient-define-suffix as-magit-diff-origin-master (args)
  "Diff with origin/master.

TODO(ariels): Make it better and also document it."
  :description "origin/master"
  (interactive (list (magit-rebase-arguments)))
  (magit-diff-setup-buffer "origin/master" nil args nil))

(transient-insert-suffix 'magit-diff "r"
  (list "o" #'as-magit-diff-origin-master))