--- /dev/null
+;;; async-bytecomp.el --- Async functions to compile elisp files async
+
+;; Copyright (C) 2014 John Wiegley
+;; Copyright (C) 2014 Thierry Volpiatto
+
+;; Authors: John Wiegley <jwiegley@gmail.com>
+;; Thierry Volpiatto <thierry.volpiatto@gmail.com>
+
+;; Version: 1.0
+;; Keywords: dired async byte-compile
+;; X-URL: https://github.com/jwiegley/dired-async
+
+;; 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 2, 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., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+;;
+;; This package provide the `async-byte-recompile-directory' function
+;; which allows, as the name says to recompile a directory outside of
+;; your running emacs.
+;; The benefit is your files will be compiled in a clean environment without
+;; the old *.el files loaded.
+;; Among other things, this fix a bug in package.el which recompile
+;; the new files in the current environment with the old files loaded, creating
+;; errors in most packages after upgrades.
+;;
+;; NB: This package is advicing the function `package--compile'.
+
+;;; Code:
+
+(require 'async)
+
+(defvar async-byte-compile-log-file "/tmp/async-bytecomp.log")
+
+(defun async-byte-recompile-directory (directory &optional arg force)
+ (cl-loop with dir = (directory-files directory t "\\.elc\\'")
+ unless dir return nil
+ for f in dir
+ when (file-exists-p f) do (delete-file f))
+ (let ((call-back
+ `(lambda (&optional ignore)
+ (if (file-exists-p async-byte-compile-log-file)
+ (progn
+ (pop-to-buffer (generate-new-buffer-name
+ byte-compile-log-buffer))
+ (erase-buffer)
+ (insert-file-contents async-byte-compile-log-file)
+ (compilation-mode)
+ (delete-file async-byte-compile-log-file)
+ (let ((n 0))
+ (save-excursion
+ (goto-char (point-min))
+ (while (re-search-forward "^.*:Error:" nil t)
+ (incf n)))
+ (when (> n 0)
+ (message "Failed to compile %d files in directory `%s'" n ,directory))))
+ (message "Directory `%s' compiled asynchronously with success" ,directory)))))
+ (async-start
+ `(lambda ()
+ (require 'bytecomp)
+ ,(async-inject-variables "\\`load-path\\'")
+ (let ((default-directory (file-name-as-directory ,directory))
+ error-data)
+ (add-to-list 'load-path default-directory)
+ (byte-recompile-directory ,directory ,arg ,force)
+ (when (get-buffer byte-compile-log-buffer)
+ (setq error-data (with-current-buffer byte-compile-log-buffer
+ (buffer-substring-no-properties (point-min) (point-max))))
+ (unless (string= error-data "")
+ (with-temp-file ,async-byte-compile-log-file
+ (erase-buffer)
+ (insert error-data))))))
+ call-back)
+ (message "Started compiling asynchronously directory %s..." directory)))
+
+(defadvice package--compile (around byte-compile-async activate)
+ (package-activate-1 pkg-desc)
+ (async-byte-recompile-directory (package-desc-dir pkg-desc) 0 t))
+
+(provide 'async-bytecomp)
+
+;;; async-bytecomp.el ends here