code.delx.au - gnu-emacs-elpa/blob - scripts/download-dependencies.el

   1 ;;; scripts/download-dependencies.el --- Get files for development. -*- lexical-binding: t; -*-
   2
   3 ;; Copyright (C) 2014-2015  Free Software Foundation, Inc.
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; This program is free software; you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation, either version 3 of the License, or
  10 ;; (at your option) any later version.
  11
  12 ;; This program is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 ;; This script downloads some dependencies for development so they don't need to
  21 ;; be version-controlled.
  22
  23 ;;; Code:
  24
  25 (defconst directory (file-name-directory (or load-file-name buffer-file-name))
  26   "This file's directory.")
  27
  28 (defun resolve-path (path)
  29   "Resolve a path relative to this file's directory."
  30   (expand-file-name path directory))
  31
  32 (defun strip-headers ()
  33   "Remove the http headers included in the output of
  34 `url-retrieve-synchronously'."
  35   (goto-char 1)
  36   (kill-paragraph 1) ; The headers are 1 paragraph. I hope.
  37   (kill-line)        ; A line separates the headers from the file's content.
  38   )
  39
  40 ;; Download any missing dependencies.
  41 (let ((files '("https://raw.githubusercontent.com/mooz/js2-mode/master/js2-mode.el"
  42                "https://raw.githubusercontent.com/rejeep/ert-async.el/master/ert-async.el")))
  43   (make-directory (resolve-path "../libraries") t)
  44   (dolist (file files)
  45     (let* ((basename (file-name-nondirectory file))
  46            (destination (resolve-path (concat "../libraries/" basename))))
  47       (when (null (file-exists-p destination))
  48         (with-current-buffer (url-retrieve-synchronously file)
  49           (strip-headers)
  50           (write-file destination))))))
  51
  52 ;;; download-dependencies.el ends here