Allows you to use dired to add multiple files to a git repository. This is useful since staging files in magit is sluggish and takes a long time when you have a lot of files.

git-add-dired.el

(defun git-add-files(files)
  "Run git add with the input file"
  (interactive)      
  (shell-command (format "git add %s" files)))

(defun dired-git-add-marked-files() 
  "For each marked file in a dired buffer add it to the index"
  (interactive)
  (if (eq major-mode 'dired-mode)
      (let ((filenames (dired-get-marked-files))
	    (files ""))
	(dolist (fn filenames)
	  (setq fn (shell-quote-argument fn))
	  (setq files (concat files " " fn)))
	(git-add-files files))
    (error (format "Not a Dired buffer \(%s\)" major-mode))))