;;; async-bytecomp.el --- Compile elisp files asynchronously -*- lexical-binding: t -*-
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;; Copyright (C) 2014-2016 Free Software Foundation, Inc.
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;; Authors: John Wiegley <jwiegley@gmail.com>
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;; Thierry Volpiatto <thierry.volpiatto@gmail.com>
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;; Keywords: dired async byte-compile
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;; X-URL: https://github.com/jwiegley/dired-async
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2, or (at
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;; your option) any later version.
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;; This program is distributed in the hope that it will be useful, but
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;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;
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;; This package provide the `async-byte-recompile-directory' function
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;; which allows, as the name says to recompile a directory outside of
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;; your running emacs.
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;; The benefit is your files will be compiled in a clean environment without
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;; the old *.el files loaded.
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;; Among other things, this fix a bug in package.el which recompile
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;; the new files in the current environment with the old files loaded, creating
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;; errors in most packages after upgrades.
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;;
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;; NB: This package is advicing the function `package--compile'.
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;;; Code:
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(require 'cl-lib)
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(require 'async)
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(defcustom async-bytecomp-allowed-packages
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'(async helm helm-core helm-ls-git helm-ls-hg magit)
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"Packages in this list will be compiled asynchronously by `package--compile'.
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All the dependencies of these packages will be compiled async too,
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so no need to add dependencies to this list.
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The value of this variable can also be a list with a single element,
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the symbol `all', in this case packages are always compiled asynchronously."
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:group 'async
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:type '(repeat (choice symbol)))
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(defvar async-byte-compile-log-file
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(concat user-emacs-directory "async-bytecomp.log"))
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;;;###autoload
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(defun async-byte-recompile-directory (directory &optional quiet)
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"Compile all *.el files in DIRECTORY asynchronously.
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All *.elc files are systematically deleted before proceeding."
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(cl-loop with dir = (directory-files directory t "\\.elc\\'")
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unless dir return nil
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for f in dir
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when (file-exists-p f) do (delete-file f))
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;; Ensure async is reloaded when async.elc is deleted.
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;; This happen when recompiling its own directory.
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(load "async")
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(let ((call-back
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(lambda (&optional _ignore)
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(if (file-exists-p async-byte-compile-log-file)
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(let ((buf (get-buffer-create byte-compile-log-buffer))
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(n 0))
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(with-current-buffer buf
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(goto-char (point-max))
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(let ((inhibit-read-only t))
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(insert-file-contents async-byte-compile-log-file)
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(compilation-mode))
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(display-buffer buf)
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(delete-file async-byte-compile-log-file)
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(unless quiet
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(save-excursion
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(goto-char (point-min))
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(while (re-search-forward "^.*:Error:" nil t)
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(cl-incf n)))
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(if (> n 0)
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(message "Failed to compile %d files in directory `%s'" n directory)
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(message "Directory `%s' compiled asynchronously with warnings" directory)))))
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(unless quiet
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(message "Directory `%s' compiled asynchronously with success" directory))))))
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(async-start
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`(lambda ()
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(require 'bytecomp)
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,(async-inject-variables "\\`\\(load-path\\)\\|byte\\'")
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(let ((default-directory (file-name-as-directory ,directory))
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error-data)
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(add-to-list 'load-path default-directory)
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(byte-recompile-directory ,directory 0 t)
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(when (get-buffer byte-compile-log-buffer)
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(setq error-data (with-current-buffer byte-compile-log-buffer
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(buffer-substring-no-properties (point-min) (point-max))))
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(unless (string= error-data "")
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(with-temp-file ,async-byte-compile-log-file
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(erase-buffer)
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(insert error-data))))))
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call-back)
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(unless quiet (message "Started compiling asynchronously directory %s" directory))))
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(defvar package-archive-contents)
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(defvar package-alist)
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(declare-function package-desc-reqs "package.el" (cl-x))
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(defun async-bytecomp--get-package-deps (pkg &optional only)
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;; Same as `package--get-deps' but parse instead `package-archive-contents'
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;; because PKG is not already installed and not present in `package-alist'.
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;; However fallback to `package-alist' in case PKG no more present
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;; in `package-archive-contents' due to modification to `package-archives'.
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;; See issue #58.
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(let* ((pkg-desc (cadr (or (assq pkg package-archive-contents)
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(assq pkg package-alist))))
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(direct-deps (cl-loop for p in (package-desc-reqs pkg-desc)
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for name = (car p)
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when (or (assq name package-archive-contents)
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(assq name package-alist))
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collect name))
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(indirect-deps (unless (eq only 'direct)
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(delete-dups
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(cl-loop for p in direct-deps append
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(async-bytecomp--get-package-deps p))))))
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(cl-case only
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(direct direct-deps)
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(separate (list direct-deps indirect-deps))
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(indirect indirect-deps)
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(t (delete-dups (append direct-deps indirect-deps))))))
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(defun async-bytecomp-get-allowed-pkgs ()
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(when (and async-bytecomp-allowed-packages
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(listp async-bytecomp-allowed-packages))
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(if package-archive-contents
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(cl-loop for p in async-bytecomp-allowed-packages
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when (assq p package-archive-contents)
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append (async-bytecomp--get-package-deps p) into reqs
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finally return
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(delete-dups
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(append async-bytecomp-allowed-packages reqs)))
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async-bytecomp-allowed-packages)))
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(defadvice package--compile (around byte-compile-async)
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(let ((cur-package (package-desc-name pkg-desc))
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(pkg-dir (package-desc-dir pkg-desc)))
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(if (or (equal async-bytecomp-allowed-packages '(all))
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(memq cur-package (async-bytecomp-get-allowed-pkgs)))
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(progn
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(when (eq cur-package 'async)
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(fmakunbound 'async-byte-recompile-directory))
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;; Add to `load-path' the latest version of async and
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;; reload it when reinstalling async.
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(when (string= cur-package "async")
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(cl-pushnew pkg-dir load-path)
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(load "async-bytecomp"))
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;; `async-byte-recompile-directory' will add directory
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;; as needed to `load-path'.
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(async-byte-recompile-directory (package-desc-dir pkg-desc) t))
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ad-do-it)))
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;;;###autoload
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(define-minor-mode async-bytecomp-package-mode
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"Byte compile asynchronously packages installed with package.el.
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Async compilation of packages can be controlled by
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`async-bytecomp-allowed-packages'."
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:group 'async
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:global t
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(if async-bytecomp-package-mode
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(ad-activate 'package--compile)
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(ad-deactivate 'package--compile)))
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;;;###autoload
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(defun async-byte-compile-file (file)
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"Byte compile Lisp code FILE asynchronously.
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Same as `byte-compile-file' but asynchronous."
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(interactive "fFile: ")
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(let ((call-back
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(lambda (&optional _ignore)
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(let ((bn (file-name-nondirectory file)))
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(if (file-exists-p async-byte-compile-log-file)
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(let ((buf (get-buffer-create byte-compile-log-buffer))
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start)
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(with-current-buffer buf
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(goto-char (setq start (point-max)))
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(let ((inhibit-read-only t))
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(insert-file-contents async-byte-compile-log-file)
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(compilation-mode))
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(display-buffer buf)
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(delete-file async-byte-compile-log-file)
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(save-excursion
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(goto-char start)
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(if (re-search-forward "^.*:Error:" nil t)
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(message "Failed to compile `%s'" bn)
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(message "`%s' compiled asynchronously with warnings" bn)))))
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(message "`%s' compiled asynchronously with success" bn))))))
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(async-start
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`(lambda ()
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(require 'bytecomp)
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,(async-inject-variables "\\`load-path\\'")
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(let ((default-directory ,(file-name-directory file)))
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(add-to-list 'load-path default-directory)
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(byte-compile-file ,file)
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(when (get-buffer byte-compile-log-buffer)
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(setq error-data (with-current-buffer byte-compile-log-buffer
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(buffer-substring-no-properties (point-min) (point-max))))
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(unless (string= error-data "")
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(with-temp-file ,async-byte-compile-log-file
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(erase-buffer)
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(insert error-data))))))
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call-back)))
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(provide 'async-bytecomp)
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;;; async-bytecomp.el ends here
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