[elpa] master b2b4bd6 107/187: * async-bytecomp.el: New file.

[Michael Albinus]

branch: master
commit b2b4bd62cf5c9d96a5a7a395e4f522044d47c7d4
Author: Thierry Volpiatto <address@hidden>
Commit: Thierry Volpiatto <address@hidden>

    * async-bytecomp.el: New file.
---
 async-bytecomp.el |   94 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 94 insertions(+), 0 deletions(-)

diff --git a/async-bytecomp.el b/async-bytecomp.el
new file mode 100644
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--- /dev/null
+++ b/async-bytecomp.el
@@ -0,0 +1,94 @@
+;;; async-bytecomp.el --- Async functions to compile elisp files async
+
+;; Copyright (C) 2014 John Wiegley
+;; Copyright (C) 2014 Thierry Volpiatto
+
+;; Authors: John Wiegley <address@hidden>
+;;          Thierry Volpiatto <address@hidden>
+
+;; 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