(require 'package)
(add-to-list 'package-archives
             '("marmalade" . "http://marmalade-repo.org/packages/"))
(add-to-list 'package-archives
             '("melpa" . "http://melpa.org/packages/"))
(add-to-list 'package-archives
             '("org" . "http://orgmode.org/elpa/"))

(package-initialize)
(defvar my-packages '(clojure-mode
                      cider
                      ac-cider))
(dolist (p my-packages)
  (when (not (package-installed-p p))
    (package-install p)))