--- /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>
+
+;; 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 'cl-lib)
+(require 'async)
+
+(defcustom async-bytecomp-allowed-packages
+ '(async helm helm-core helm-ls-git helm-ls-hg magit)
+ "Packages in this list will be compiled asynchronously by `package--compile'.
+All the dependencies of these packages will be compiled async too,
+so no need to add dependencies to this list.
+The value of this variable can also be a list with a single element,
+the symbol `all', in this case packages are always compiled asynchronously."
+ :group 'async
+ :type '(repeat (choice symbol)))
+
+(defvar async-byte-compile-log-file "~/.emacs.d/async-bytecomp.log")
+
+;;;###autoload
+(defun async-byte-recompile-directory (directory &optional quiet)
+ "Compile all *.el files in DIRECTORY asynchronously.
+All *.elc files are systematically deleted before proceeding."
+ (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))
+ ;; Ensure async is reloaded when async.elc is deleted.
+ ;; This happen when recompiling its own directory.
+ (load "async")
+ (let ((call-back
+ `(lambda (&optional ignore)
+ (if (file-exists-p async-byte-compile-log-file)
+ (let ((buf (get-buffer-create byte-compile-log-buffer))
+ (n 0))
+ (with-current-buffer buf
+ (goto-char (point-max))
+ (let ((inhibit-read-only t))
+ (insert-file-contents async-byte-compile-log-file)
+ (compilation-mode))
+ (display-buffer buf)
+ (delete-file async-byte-compile-log-file)
+ (unless ,quiet
+ (save-excursion
+ (goto-char (point-min))
+ (while (re-search-forward "^.*:Error:" nil t)
+ (cl-incf n)))
+ (if (> n 0)
+ (message "Failed to compile %d files in directory `%s'" n ,directory)
+ (message "Directory `%s' compiled asynchronously with warnings" ,directory)))))
+ (unless ,quiet
+ (message "Directory `%s' compiled asynchronously with success" ,directory))))))
+ (async-start
+ `(lambda ()
+ (require 'bytecomp)
+ ,(async-inject-variables "\\`\\(load-path\\)\\|byte\\'")
+ (let ((default-directory (file-name-as-directory ,directory))
+ error-data)
+ (add-to-list 'load-path default-directory)
+ (byte-recompile-directory ,directory 0 t)
+ (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)
+ (unless quiet (message "Started compiling asynchronously directory %s" directory))))
+
+(defvar package-archive-contents)
+(declare-function package-desc-reqs "package.el" (cl-x))
+
+(defun async-bytecomp--get-package-deps (pkg &optional only)
+ ;; Same as `package--get-deps' but parse instead `package-archive-contents'
+ ;; because PKG is not already installed and not present in `package-alist'.
+ (let* ((pkg-desc (cadr (assq pkg package-archive-contents)))
+ (direct-deps (cl-loop for p in (package-desc-reqs pkg-desc)
+ for name = (car p)
+ when (assq name package-archive-contents)
+ collect name))
+ (indirect-deps (unless (eq only 'direct)
+ (delete-dups
+ (cl-loop for p in direct-deps append
+ (async-bytecomp--get-package-deps p))))))
+ (cl-case only
+ (direct direct-deps)
+ (separate (list direct-deps indirect-deps))
+ (indirect indirect-deps)
+ (t (delete-dups (append direct-deps indirect-deps))))))
+
+(defun async-bytecomp-get-allowed-pkgs ()
+ (when (and async-bytecomp-allowed-packages
+ (listp async-bytecomp-allowed-packages))
+ (if package-archive-contents
+ (cl-loop for p in async-bytecomp-allowed-packages
+ when (assq p package-archive-contents)
+ append (async-bytecomp--get-package-deps p) into reqs
+ finally return
+ (delete-dups
+ (append async-bytecomp-allowed-packages reqs)))
+ async-bytecomp-allowed-packages)))
+
+(defadvice package--compile (around byte-compile-async)
+ (let ((cur-package (package-desc-name pkg-desc))
+ (pkg-dir (package-desc-dir pkg-desc)))
+ (if (or (equal async-bytecomp-allowed-packages '(all))
+ (memq cur-package (async-bytecomp-get-allowed-pkgs)))
+ (progn
+ (when (eq cur-package 'async)
+ (fmakunbound 'async-byte-recompile-directory))
+ ;; Add to `load-path' the latest version of async and
+ ;; reload it when reinstalling async.
+ (when (string= cur-package "async")
+ (cl-pushnew pkg-dir load-path)
+ (load "async-bytecomp"))
+ ;; `async-byte-recompile-directory' will add directory
+ ;; as needed to `load-path'.
+ (async-byte-recompile-directory (package-desc-dir pkg-desc) t))
+ ad-do-it)))
+
+;;;###autoload
+(define-minor-mode async-bytecomp-package-mode
+ "Byte compile asynchronously packages installed with package.el.
+Async compilation of packages can be controlled by
+`async-bytecomp-allowed-packages'."
+ :group 'async
+ :global t
+ (if async-bytecomp-package-mode
+ (ad-activate 'package--compile)
+ (ad-deactivate 'package--compile)))
+
+(provide 'async-bytecomp)
+
+;;; async-bytecomp.el ends here