test.el

(require 'package)

(setq packages-archives '("melpa" . "https://melpa.org/packages/"))
(defvar *my-packages* '(company
                        slime-company
                        doom-themes
                        powerline
                        airline-themes)
  "My wonderful packages")

(defun ensure-package (package)
  "Install PACKAGE if is not already installed."
  (unless (package-installed-p package)
    (package-install package)))


(package-initialize)
(package-refresh-contents)
(mapcar #'ensure-package *my-packages*)