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(require 'package)

(add-to-list 'package-archives
             '("melpa"     . "http://melpa.milkbox.net/packages/"))
(add-to-list 'package-archives
             '("marmalade" . "http://marmalade-repo.org/packages/"))
(package-initialize)

(unless (file-exists-p "~/.emacs.d/elpa/archives/melpa")
  (package-refresh-contents))

(defun packages-install (packages)
  (mapcar (lambda (package)
            (when (not (package-installed-p package))
              (package-install package)))
          packages)
  (delete-other-windows))

;; Install extensions if they're missing
(defun init--install-packages ()
  (packages-install
   '(ace-jump-mode
     auctex
     better-defaults
     company
     company-inf-ruby
     centered-cursor-mode
     dired-details
     dired+
     erc-hl-nicks
     expand-region
     fill-column-indicator
     fullscreen-mode
     god-mode
     geiser
     guide-key
     haskell-mode
     helm
     hungry-delete
     ido-ubiquitous
     ido-vertical-mode
     idomenu
     inf-ruby
     info+
     js2-mode
     magit
     markdown-mode
     multiple-cursors
     nyan-mode
     page-break-lines
     paredit
     paren-face
     perspective
     projectile
     puppet-mode
     rich-minority
     ruby-block
     ruby-mode
     sicp
     scss-mode
     shell-switcher
     skewer-mode
     smart-mode-line
     smex
     sublime-themes
     tagedit
     typopunct
     undo-tree
     visual-regexp-steroids
     znc)))

(condition-case nil
    (init--install-packages)
  (error
   (package-refresh-contents)
   (init--install-packages)))