--- /dev/null
+;;; cus-dep.el --- Find customization dependencies.
+;;
+;; Copyright (C) 1997 Free Software Foundation, Inc.
+;;
+;; Author: Per Abrahamsen <abraham@dina.kvl.dk>, then
+;; Richard Stallman <rms@gnu.ai.mit.edu>, then
+;; Hrvoje Niksic <hniksic@srce.hr> (rewritten for XEmacs)
+;; Maintainer: Hrvoje Niksic <hniksic@srce.hr>
+;; Keywords: internal
+
+;; This file is part of XEmacs.
+
+;; XEmacs 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 2, or (at your option)
+;; any later version.
+
+;; XEmacs 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 XEmacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Synched up with: Not synched with FSF.
+
+\f
+;;; Commentary:
+
+;; This file generates the custom-load files, loaded by cus-load.el.
+;; The only entry point is `Custom-make-dependencies'.
+
+;; It works by scanning all the `.el' files in a directory, and
+;; evaluates any `defcustom', `defgroup', or `defface' expression that
+;; it finds. The symbol changed by this expression is stored to a
+;; hash table as the hash key, file name being the value.
+
+;; After all the files have been examined, custom-loads.el is
+;; generated by mapping all the atoms, and seeing if any of them
+;; contains a `custom-group' property. This property is a list whose
+;; each element's car is the "child" group symbol. If that property
+;; is in the hash-table, the file name will be looked up from the
+;; hash-table, and added to cusload-file. Because the hash-table is
+;; cleared whenever we process a new directory, we cannot get confused
+;; by custom-loads from another directory, or from a previous
+;; installation. This is also why it is perfectly safe to have old
+;; custom-loads around, and have them loaded by `cus-load.el' (as
+;; invoked by `cus-edit.el').
+
+;; A trivial, but useful optimization is that if cusload-file exists,
+;; and no .el files in the directory are newer than cusload-file, it
+;; will not be generated. This means that the directories where
+;; nothing has changed will be skipped.
+
+;; The `custom-add-loads' function, used by files generated by
+;; `Custom-make-dependencies', updates the symbol's `custom-loads'
+;; property (a list of strings) with a new list of strings,
+;; eliminating the duplicates. Additionally, it adds the symbol to
+;; `custom-group-hash-table'. It is defined in `cus-load.el'.
+
+;; Example:
+
+;; (custom-add-loads 'foo 'custom-loads '("bar" "baz"))
+;; (get 'foo 'custom-loads)
+;; => ("bar" "baz")
+;;
+;; (custom-add-loads 'foo 'custom-loads '("hmph" "baz" "quz"))
+;; (get 'foo 'custom-loads)
+;; => ("bar" "baz" "hmph" "qux")
+
+;; Obviously, this allows correct incremental loading of custom-load
+;; files. This is not necessary under FSF (they simply use `put'),
+;; since they have only one file with custom dependencies. With the
+;; advent of packages, we cannot afford the same luxury.
+
+\f
+;;; Code:
+
+(require 'cl)
+(require 'widget)
+(require 'cus-face)
+
+;; Don't change this, unless you plan to change the code in
+;; cus-start.el, too.
+(defconst cusload-base-file "custom-load.el")
+
+;; Be very careful when changing this function. It looks easy to
+;; understand, but is in fact very easy to break. Be sure to read and
+;; understand the commentary above!
+
+;;;###autoload
+(defun Custom-make-dependencies (&optional subdirs)
+ "Extract custom dependencies from .el files in SUBDIRS.
+SUBDIRS is a list of directories. If it is nil, the command-line
+arguments are used. If it is a string, only that directory is
+processed. This function is especially useful in batch mode.
+
+Batch usage: xemacs -batch -l cus-dep.el -f Custom-make-dependencies DIRS"
+ (interactive "DDirectory: ")
+ (and (stringp subdirs)
+ (setq subdirs (list subdirs)))
+ (or subdirs
+ ;; Usurp the command-line-args
+ (setq subdirs command-line-args-left
+ command-line-args-left nil))
+ (setq subdirs (mapcar #'expand-file-name subdirs))
+ (with-temp-buffer
+ (let ((enable-local-eval nil)
+ (hash (make-hash-table :test 'eq)))
+ (dolist (dir subdirs)
+ (princ (format "Processing %s\n" dir))
+ (let ((cusload-file (expand-file-name cusload-base-file dir))
+ (files (directory-files dir t "\\`[^=].*\\.el\\'")))
+ ;; A trivial optimization: if no file in the directory is
+ ;; newer than custom-load.el, no need to do anything!
+ (if (and (file-exists-p cusload-file)
+ (dolist (file files t)
+ (when (file-newer-than-file-p file cusload-file)
+ (return nil))))
+ (princ "(No changes need to be written)\n")
+ ;; Process directory
+ (dolist (file files)
+ (when (file-exists-p file)
+ (erase-buffer)
+ (insert-file-contents file)
+ (goto-char (point-min))
+ (let ((name (file-name-sans-extension
+ (file-name-nondirectory file))))
+ ;; Search for defcustom/defface/defgroup
+ ;; expressions, and evaluate them.
+ (ignore-errors
+ (while (re-search-forward
+ "^(defcustom\\|^(defface\\|^(defgroup"
+ nil t)
+ (beginning-of-line)
+ (let ((expr (read (current-buffer))))
+ (eval expr)
+ ;; Hash the file of the affected symbol.
+ (setf (gethash (nth 1 expr) hash) name)))))))
+ (cond
+ ((zerop (hash-table-count hash))
+ (princ "(No customization dependencies")
+ (when (file-exists-p cusload-file)
+ (princ (format ", deleting %s" cusload-file))
+ (delete-file cusload-file))
+ (princ ")\n"))
+ (t
+ (princ (format "Generating %s...\n" cusload-base-file))
+ (with-temp-file cusload-file
+ (insert ";;; " cusload-base-file
+ " --- automatically extracted custom dependencies\n"
+ "\n;;; Code:\n\n")
+ (mapatoms
+ (lambda (sym)
+ (let ((members (get sym 'custom-group))
+ item where found)
+ (when members
+ (while members
+ (setq item (car (car members))
+ members (cdr members)
+ where (gethash item hash))
+ (unless (or (null where)
+ (member where found))
+ (if found
+ (insert " ")
+ (insert "(custom-add-loads '"
+ (symbol-name sym) " '("))
+ (prin1 where (current-buffer))
+ (push where found)))
+ (when found
+ (insert "))\n"))))))
+ (insert "\n;;; custom-load.el ends here\n"))
+ (clrhash hash)))))))))
+
+(provide 'cus-dep)
+
+;;; cus-dep.el ends here
projects / chise / xemacs-chise.git.1 / blobdiff