Simple package management for Emacs

packages.el

;; Package manager for ELPA (and add MELPA).
(require 'package)
(add-to-list 'package-archives
             '("melpa" . "https://melpa.org/packages/"))
(package-initialize)

;; Function to install all required packages on a new machine.
(defun jim-install-packages ()
  (interactive)
  (defvar jim-packages
    '(go-mode flymake-go dot-mode whole-line-or-region auto-complete go-autocomplete arduino-mode))
  (package-refresh-contents)
  (dolist (p jim-packages)
    (when (not (package-installed-p p))
      (package-install p))))