;;; cus-dep.el --- find customization dependencies
;;
;; Copyright (C) 1997, 2001, 2002, 2003, 2004, 2005,
;;   2006, 2007, 2008 Free Software Foundation, Inc.
;;
;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
;; Keywords: internal

;; This file is part of GNU Emacs.

;; GNU Emacs 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 3, or (at your option)
;; any later version.

;; GNU Emacs 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:

;;; Code:

(eval-when-compile (require 'cl))
(require 'widget)
(require 'cus-face)

(defvar generated-custom-dependencies-file "cus-load.el"
  "Output file for \\[custom-make-dependencies].")

(defun custom-make-dependencies ()
  "Batch function to extract custom dependencies from .el files.
Usage: emacs -batch -l ./cus-dep.el -f custom-make-dependencies DIRS"
  (let ((enable-local-eval nil))
    (set-buffer (get-buffer-create " cus-dep temp"))
    (dolist (subdir command-line-args-left)
      (message "Directory %s" subdir)
      (let ((files (directory-files subdir nil "\\`[^=].*\\.el\\'"))
	    (default-directory (expand-file-name subdir))
	    (preloaded (concat "\\`"
			       (regexp-opt (mapcar
					    (lambda (f)
					      (file-name-sans-extension
					       (file-name-nondirectory f)))
					    preloaded-file-list) t)
			       "\\.el\\'")))
	(dolist (file files)
	  (when (and (file-exists-p file)
		     ;; Ignore files that are preloaded.
		     (not (string-match preloaded file)))
	    (erase-buffer)
	    (insert-file-contents file)
	    (goto-char (point-min))
	    (string-match "\\`\\(.*\\)\\.el\\'" file)
	    (let ((name (file-name-nondirectory (match-string 1 file)))
		  (load-file-name file))
	      (if (save-excursion
		    (re-search-forward
		     (concat "(provide[ \t\n]+\\('\\|(quote[ \t\n]\\)[ \t\n]*"
			     (regexp-quote name) "[ \t\n)]")
		     nil t))
		  (setq name (intern name)))
	      (condition-case nil
		  (while (re-search-forward
			  "^(def\\(custom\\|face\\|group\\)" nil t)
		    (beginning-of-line)
		    (let ((expr (read (current-buffer))))
		      (condition-case nil
			  (let ((custom-dont-initialize t))
			    (eval expr)
			    (put (nth 1 expr) 'custom-where name))
			(error nil))))
		(error nil))))))))
  (message "Generating %s..." generated-custom-dependencies-file)
  (set-buffer (find-file-noselect generated-custom-dependencies-file))
  (erase-buffer)
  (insert ";;; " (file-name-nondirectory generated-custom-dependencies-file)
      " --- automatically extracted custom dependencies
;;\n;;; Code:

")
  (mapatoms (lambda (symbol)
	      (let ((members (get symbol 'custom-group))
                    where found)
		(when members
		  (dolist (member
                           ;; So x and no-x builds won't differ.
                           (sort (mapcar 'car members) 'string<))
		    (setq where (get member 'custom-where))
		    (unless (or (null where)
				(member where found))
		      (push where found)))
		  (when found
		    (insert "(put '" (symbol-name symbol)
                            " 'custom-loads '")
                    (prin1 (nreverse found) (current-buffer))
                    (insert ")\n"))))))
  (insert "\
;; These are for handling :version.  We need to have a minimum of
;; information so `customize-changed-options' could do its job.

;; For groups we set `custom-version', `group-documentation' and
;; `custom-tag' (which are shown in the customize buffer), so we
;; don't have to load the file containing the group.

;; `custom-versions-load-alist' is an alist that has as car a version
;; number and as elts the files that have variables or faces that
;; contain that version. These files should be loaded before showing
;; the customization buffer that `customize-changed-options'
;; generates.

;; This macro is used so we don't modify the information about
;; variables and groups if it's already set. (We don't know when
;; " (file-name-nondirectory generated-custom-dependencies-file)
      " is going to be loaded and at that time some of the
;; files might be loaded and some others might not).
\(defmacro custom-put-if-not (symbol propname value)
  `(unless (get ,symbol ,propname)
     (put ,symbol ,propname ,value)))

")
  (let ((version-alist nil))
    (mapatoms (lambda (symbol)
		(let ((version (get symbol 'custom-version))
		      where)
		  (when version
		    (setq where (get symbol 'custom-where))
		    (when where
		      (if (or (custom-variable-p symbol)
			      (custom-facep symbol))
			  ;; This means it's a variable or a face.
			  (progn
			    (if (assoc version version-alist)
				(unless
				    (member where
					    (cdr (assoc version version-alist)))
				  (push where (cdr (assoc version version-alist))))
			      (push (cons version (list where)) version-alist)))
			;; This is a group
			(insert "(custom-put-if-not '" (symbol-name symbol)
				" 'custom-version ")
			(prin1 version (current-buffer))
			(insert ")\n")
			(insert "(custom-put-if-not '" (symbol-name symbol))
			(insert " 'group-documentation ")
			(prin1 (get symbol 'group-documentation) (current-buffer))
			(insert ")\n")
			(when (get symbol 'custom-tag)
			  (insert "(custom-put-if-not '" (symbol-name symbol))
			  (insert " 'custom-tag ")
			  (prin1 (get symbol 'custom-tag) (current-buffer))
			  (insert ")\n"))
			))))))

    (insert "\n(defvar custom-versions-load-alist "
	    (if version-alist "'" ""))
    (prin1 version-alist (current-buffer))
    (insert "\n \"For internal use by custom.\")\n"))

  (insert "\

\(provide '" (file-name-sans-extension
	      (file-name-nondirectory generated-custom-dependencies-file)) ")

;; Local Variables:
;; version-control: never
;; no-byte-compile: t
;; no-update-autoloads: t
;; End:\n;;; "
              (file-name-nondirectory generated-custom-dependencies-file)
              " ends here\n")
  (let ((kept-new-versions 10000000))
    (save-buffer))
  (message "Generating %s...done" generated-custom-dependencies-file)
  (kill-emacs))



;; arch-tag: b7b6421a-bf7a-44fd-a382-6f44976bdf68
;;; cus-dep.el ends here
