emacs-prelude/prelude/prelude-packages.el

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;;; prelude-packages.el --- Emacs Prelude: default package selection.
;;
;; Copyright (c) 2011-2012 Bozhidar Batsov
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;;
;; Author: Bozhidar Batsov <bozhidar@batsov.com>
;; URL: http://batsov.com/emacs-prelude
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;; Version: 1.0.0
;; Keywords: convenience
;; This file is not part of GNU Emacs.
;;; Commentary:
;; Takes care of the automatic installation of all the packages required by
;; Emacs Prelude.
;;; License:
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License
;; as published by the Free Software Foundation; either version 3
;; of the License, or (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Code:
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(require 'cl)
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(require 'package)
(add-to-list 'package-archives
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'("melpa" . "http://melpa.milkbox.net/packages/") t)
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(package-initialize)
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(setq url-http-attempt-keepalives nil)
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(defvar prelude-packages
'(ack-and-a-half expand-region gist helm helm-projectile magit magithub melpa
rainbow-mode volatile-highlights yasnippet zenburn-theme)
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"A list of packages to ensure are installed at launch.")
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(defun prelude-packages-installed-p ()
(loop for p in prelude-packages
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when (not (package-installed-p p)) do (return nil)
finally (return t)))
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(unless (prelude-packages-installed-p)
;; check for new packages (package versions)
(message "%s" "Emacs Prelude is now refreshing its package database...")
(package-refresh-contents)
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(message "%s" " done.")
;; install the missing packages
(dolist (p prelude-packages)
(when (not (package-installed-p p))
(package-install p))))
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(provide 'prelude-packages)
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;;; prelude-packages.el ends here