+;;; 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)) ")