1;;; cus-dep.el --- find customization dependencies
2;;
3;; Copyright (C) 1997, 2001, 2002, 2003, 2004, 2005,
4;;   2006, 2007 Free Software Foundation, Inc.
5;;
6;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
7;; Keywords: internal
8
9;; This file is part of GNU Emacs.
10
11;; GNU Emacs is free software; you can redistribute it and/or modify
12;; it under the terms of the GNU General Public License as published by
13;; the Free Software Foundation; either version 2, or (at your option)
14;; any later version.
15
16;; GNU Emacs is distributed in the hope that it will be useful,
17;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19;; GNU General Public License for more details.
20
21;; You should have received a copy of the GNU General Public License
22;; along with GNU Emacs; see the file COPYING.  If not, write to the
23;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24;; Boston, MA 02110-1301, USA.
25
26;;; Commentary:
27
28;;; Code:
29
30(eval-when-compile (require 'cl))
31(require 'widget)
32(require 'cus-face)
33
34(defvar generated-custom-dependencies-file "cus-load.el"
35  "Output file for \\[custom-make-dependencies].")
36
37(defun custom-make-dependencies ()
38  "Batch function to extract custom dependencies from .el files.
39Usage: emacs -batch -l ./cus-dep.el -f custom-make-dependencies DIRS"
40  (let ((enable-local-eval nil))
41    (set-buffer (get-buffer-create " cus-dep temp"))
42    (dolist (subdir command-line-args-left)
43      (message "Directory %s" subdir)
44      (let ((files (directory-files subdir nil "\\`[^=].*\\.el\\'"))
45	    (default-directory (expand-file-name subdir))
46	    (preloaded (concat "\\`"
47			       (regexp-opt (mapcar
48					    (lambda (f)
49					      (file-name-sans-extension
50					       (file-name-nondirectory f)))
51					    preloaded-file-list) t)
52			       "\\.el\\'")))
53	(dolist (file files)
54	  (when (and (file-exists-p file)
55		     ;; Ignore files that are preloaded.
56		     (not (string-match preloaded file)))
57	    (erase-buffer)
58	    (insert-file-contents file)
59	    (goto-char (point-min))
60	    (string-match "\\`\\(.*\\)\\.el\\'" file)
61	    (let ((name (file-name-nondirectory (match-string 1 file)))
62		  (load-file-name file))
63	      (if (save-excursion
64		    (re-search-forward
65		     (concat "(provide[ \t\n]+\\('\\|(quote[ \t\n]\\)[ \t\n]*"
66			     (regexp-quote name) "[ \t\n)]")
67		     nil t))
68		  (setq name (intern name)))
69	      (condition-case nil
70		  (while (re-search-forward
71			  "^(def\\(custom\\|face\\|group\\)" nil t)
72		    (beginning-of-line)
73		    (let ((expr (read (current-buffer))))
74		      (condition-case nil
75			  (let ((custom-dont-initialize t))
76			    (eval expr)
77			    (put (nth 1 expr) 'custom-where name))
78			(error nil))))
79		(error nil))))))))
80  (message "Generating %s..." generated-custom-dependencies-file)
81  (set-buffer (find-file-noselect generated-custom-dependencies-file))
82  (erase-buffer)
83  (insert ";;; " (file-name-nondirectory generated-custom-dependencies-file)
84      " --- automatically extracted custom dependencies
85;;\n;;; Code:
86
87")
88  (mapatoms (lambda (symbol)
89	      (let ((members (get symbol 'custom-group))
90                    where found)
91		(when members
92		  (dolist (member
93                           ;; So x and no-x builds won't differ.
94                           (sort (mapcar 'car members) 'string<))
95		    (setq where (get member 'custom-where))
96		    (unless (or (null where)
97				(member where found))
98		      (push where found)))
99		  (when found
100		    (insert "(put '" (symbol-name symbol)
101                            " 'custom-loads '")
102                    (prin1 (nreverse found) (current-buffer))
103                    (insert ")\n"))))))
104  (insert "\
105;; These are for handling :version.  We need to have a minimum of
106;; information so `customize-changed-options' could do its job.
107
108;; For groups we set `custom-version', `group-documentation' and
109;; `custom-tag' (which are shown in the customize buffer), so we
110;; don't have to load the file containing the group.
111
112;; `custom-versions-load-alist' is an alist that has as car a version
113;; number and as elts the files that have variables or faces that
114;; contain that version. These files should be loaded before showing
115;; the customization buffer that `customize-changed-options'
116;; generates.
117
118;; This macro is used so we don't modify the information about
119;; variables and groups if it's already set. (We don't know when
120;; " (file-name-nondirectory generated-custom-dependencies-file)
121      " is going to be loaded and at that time some of the
122;; files might be loaded and some others might not).
123\(defmacro custom-put-if-not (symbol propname value)
124  `(unless (get ,symbol ,propname)
125     (put ,symbol ,propname ,value)))
126
127")
128  (let ((version-alist nil))
129    (mapatoms (lambda (symbol)
130		(let ((version (get symbol 'custom-version))
131		      where)
132		  (when version
133		    (setq where (get symbol 'custom-where))
134		    (when where
135		      (if (or (custom-variable-p symbol)
136			      (custom-facep symbol))
137			  ;; This means it's a variable or a face.
138			  (progn
139			    (if (assoc version version-alist)
140				(unless
141				    (member where
142					    (cdr (assoc version version-alist)))
143				  (push where (cdr (assoc version version-alist))))
144			      (push (cons version (list where)) version-alist)))
145			;; This is a group
146			(insert "(custom-put-if-not '" (symbol-name symbol)
147				" 'custom-version ")
148			(prin1 version (current-buffer))
149			(insert ")\n")
150			(insert "(custom-put-if-not '" (symbol-name symbol))
151			(insert " 'group-documentation ")
152			(prin1 (get symbol 'group-documentation) (current-buffer))
153			(insert ")\n")
154			(when (get symbol 'custom-tag)
155			  (insert "(custom-put-if-not '" (symbol-name symbol))
156			  (insert " 'custom-tag ")
157			  (prin1 (get symbol 'custom-tag) (current-buffer))
158			  (insert ")\n"))
159			))))))
160
161    (insert "\n(defvar custom-versions-load-alist "
162	    (if version-alist "'" ""))
163    (prin1 version-alist (current-buffer))
164    (insert "\n \"For internal use by custom.\")\n"))
165
166  (insert "\
167
168\(provide '" (file-name-sans-extension
169	      (file-name-nondirectory generated-custom-dependencies-file)) ")
170
171;; Local Variables:
172;; version-control: never
173;; no-byte-compile: t
174;; no-update-autoloads: t
175;; End:\n;;; "
176              (file-name-nondirectory generated-custom-dependencies-file)
177              " ends here\n")
178  (let ((kept-new-versions 10000000))
179    (save-buffer))
180  (message "Generating %s...done" generated-custom-dependencies-file)
181  (kill-emacs))
182
183
184
185;; arch-tag: b7b6421a-bf7a-44fd-a382-6f44976bdf68
186;;; cus-dep.el ends here
187