lisp/cus-dep.el

   1 ;;; cus-dep.el --- find customization dependencies
   2 ;;
   3 ;; Copyright (C) 1997, 2001-2012  Free Software Foundation, Inc.
   4 ;;
   5 ;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
   6 ;; Keywords: internal
   7 ;; Package: emacs
   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 3 of the License, or
  14 ;; (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 (eval-when-compile (require 'cl))
  29 (require 'widget)
  30 (require 'cus-face)
  31
  32 (defvar generated-custom-dependencies-file "cus-load.el"
  33   "Output file for `custom-make-dependencies'.")
  34
  35 ;; See finder-no-scan-regexp in finder.el.
  36 (defvar custom-dependencies-no-scan-regexp "\\(^\\.#\\|\\(loaddefs\\|\
  37 ldefs-boot\\|cus-load\\|finder-inf\\|esh-groups\\|subdirs\\)\\.el$\\)"
  38   "Regexp matching file names not to scan for `custom-make-dependencies'.")
  39
  40 (autoload 'autoload-rubric "autoload")
  41
  42 (defun custom-make-dependencies ()
  43   "Batch function to extract custom dependencies from .el files.
  44 Usage: emacs -batch -l ./cus-dep.el -f custom-make-dependencies DIRS"
  45   (let ((enable-local-eval nil)
  46         subdir)
  47     (with-temp-buffer
  48       ;; Use up command-line-args-left else Emacs can try to open
  49       ;; the args as directories after we are done.
  50       (while (setq subdir (pop command-line-args-left))
  51         (message "Directory %s" subdir)
  52         (let ((files (directory-files subdir nil "\\`[^=].*\\.el\\'"))
  53               (default-directory (expand-file-name subdir))
  54               (preloaded (concat "\\`"
  55                                  (regexp-opt (mapcar
  56                                               (lambda (f)
  57                                                 (file-name-sans-extension
  58                                                  (file-name-nondirectory f)))
  59                                               preloaded-file-list) t)
  60                                  "\\.el\\'")))
  61           (dolist (file files)
  62             (unless (or (string-match custom-dependencies-no-scan-regexp file)
  63                         (string-match preloaded file)
  64                         (not (file-exists-p file)))
  65               (erase-buffer)
  66               (insert-file-contents file)
  67               (goto-char (point-min))
  68               (string-match "\\`\\(.*\\)\\.el\\'" file)
  69               (let ((name (file-name-nondirectory (match-string 1 file)))
  70                     (load-file-name file))
  71                 (if (save-excursion
  72                       (re-search-forward
  73                      (concat "(provide[ \t\n]+\\('\\|(quote[ \t\n]\\)[ \t\n]*"
  74                              (regexp-quote name) "[ \t\n)]")
  75                      nil t))
  76                     (setq name (intern name)))
  77                 (condition-case nil
  78                     (while (re-search-forward
  79                             "^(def\\(custom\\|face\\|group\\)" nil t)
  80                       (beginning-of-line)
  81                       (let ((expr (read (current-buffer))))
  82                         (condition-case nil
  83                             (let ((custom-dont-initialize t))
  84                               (eval expr)
  85                               (put (nth 1 expr) 'custom-where name))
  86                           (error nil))))
  87                   (error nil)))))))))
  88   (message "Generating %s..." generated-custom-dependencies-file)
  89   (set-buffer (find-file-noselect generated-custom-dependencies-file))
  90   (setq buffer-undo-list t)
  91   (erase-buffer)
  92   (insert (autoload-rubric generated-custom-dependencies-file
  93                            "custom dependencies" t))
  94   (search-backward "\f")
  95   (mapatoms (lambda (symbol)
  96               (let ((members (get symbol 'custom-group))
  97                     where found)
  98                 (when members
  99                   (dolist (member
 100                            ;; So x and no-x builds won't differ.
 101                            (sort (mapcar 'car members) 'string<))
 102                     (setq where (get member 'custom-where))
 103                     (unless (or (null where)
 104                                 (member where found))
 105                       (push where found)))
 106                   (when found
 107                     (insert "(put '" (symbol-name symbol)
 108                             " 'custom-loads '")
 109                     (prin1 (nreverse found) (current-buffer))
 110                     (insert ")\n"))))))
 111   (insert "\
 112 ;; These are for handling :version.  We need to have a minimum of
 113 ;; information so `customize-changed-options' could do its job.
 114
 115 ;; For groups we set `custom-version', `group-documentation' and
 116 ;; `custom-tag' (which are shown in the customize buffer), so we
 117 ;; don't have to load the file containing the group.
 118
 119 ;; `custom-versions-load-alist' is an alist that has as car a version
 120 ;; number and as elts the files that have variables or faces that
 121 ;; contain that version. These files should be loaded before showing
 122 ;; the customization buffer that `customize-changed-options'
 123 ;; generates.
 124
 125 ;; This macro is used so we don't modify the information about
 126 ;; variables and groups if it's already set. (We don't know when
 127 ;; " (file-name-nondirectory generated-custom-dependencies-file)
 128       " is going to be loaded and at that time some of the
 129 ;; files might be loaded and some others might not).
 130 \(defmacro custom-put-if-not (symbol propname value)
 131   `(unless (get ,symbol ,propname)
 132      (put ,symbol ,propname ,value)))
 133
 134 ")
 135   (let ((version-alist nil))
 136     (mapatoms (lambda (symbol)
 137                 (let ((version (get symbol 'custom-version))
 138                       where)
 139                   (when version
 140                     (setq where (get symbol 'custom-where))
 141                     (when where
 142                       (if (or (custom-variable-p symbol)
 143                               (custom-facep symbol))
 144                           ;; This means it's a variable or a face.
 145                           (progn
 146                             (if (assoc version version-alist)
 147                                 (unless
 148                                     (member where
 149                                             (cdr (assoc version version-alist)))
 150                                   (push where (cdr (assoc version version-alist))))
 151                               (push (list version where) version-alist)))
 152                         ;; This is a group
 153                         (insert "(custom-put-if-not '" (symbol-name symbol)
 154                                 " 'custom-version ")
 155                         (prin1 version (current-buffer))
 156                         (insert ")\n")
 157                         (insert "(custom-put-if-not '" (symbol-name symbol))
 158                         (insert " 'group-documentation ")
 159                         (prin1 (get symbol 'group-documentation) (current-buffer))
 160                         (insert ")\n")
 161                         (when (get symbol 'custom-tag)
 162                           (insert "(custom-put-if-not '" (symbol-name symbol))
 163                           (insert " 'custom-tag ")
 164                           (prin1 (get symbol 'custom-tag) (current-buffer))
 165                           (insert ")\n"))
 166                         ))))))
 167
 168     (insert "\n(defvar custom-versions-load-alist "
 169             (if version-alist "'" ""))
 170     (prin1 version-alist (current-buffer))
 171     (insert "\n \"For internal use by custom.\")\n"))
 172   (save-buffer)
 173   (message "Generating %s...done" generated-custom-dependencies-file))
 174
 175 \f
 176
 177 ;;; cus-dep.el ends here