1 ;;; gnus-compat.el --- Compatability functions for Gnus
3 ;; Copyright (C) 2012 Free Software Foundation, Inc.
5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
25 ;; This package defines and redefines a bunch of functions for Gnus
26 ;; usage. The basic (and somewhat unsound) idea is to make all
27 ;; Emacsen look like the current trunk of Emacs. So it will define
28 ;; functions "missing" in other Emacs instances, and redefine other
29 ;; functions to work like the Emacs trunk versions.
31 (eval-when-compile (require 'cl))
36 ;; XEmacs doesn't have this function.
37 (when (and (not (fboundp 'help-function-arglist))
38 (fboundp 'function-arglist))
39 (defun help-function-arglist (def &optional preserve-names)
40 "Return a formal argument list for the function DEF.
41 PRESERVE-NAMES is ignored."
42 (cdr (car (read-from-string (downcase (function-arglist def)))))))
44 ;; Modify this function on Emacs 23.1 and earlier to always return the
46 (when (and (fboundp 'help-function-arglist)
47 (eq (help-function-arglist 'car) t))
48 (defvar gnus-compat-original-help-function-arglist
49 (symbol-function 'help-function-arglist))
50 (defun help-function-arglist (def &optional preserve-names)
51 "Return a formal argument list for the function DEF.
52 PRESERVE-NAMES is ignored."
53 (let ((orig (funcall gnus-compat-original-help-function-arglist def)))
56 ;; Built-in subrs have the arglist hidden in the doc string.
57 (let ((doc (documentation def)))
59 (string-match "\n\n\\((fn\\( .*\\)?)\\)\\'" doc))
60 (cdr (car (read-from-string (downcase (match-string 1 doc)))))))))))
62 (when (= (length (help-function-arglist 'delete-directory)) 1)
63 (defvar gnus-compat-original-delete-directory
64 (symbol-function 'delete-directory))
65 (defun delete-directory (directory &optional recursive trash)
66 "Delete the directory named DIRECTORY. Does not follow symlinks.
67 If RECURSIVE is non-nil, all files in DIRECTORY are deleted as well.
69 (interactive "DDirectory: ")
71 (funcall gnus-compat-original-delete-directory directory)
72 (dolist (file (directory-files directory t))
73 (unless (member (file-name-nondirectory file) '("." ".."))
74 (if (file-directory-p file)
75 (delete-directory file t)
77 (delete-directory directory))))
79 (provide 'gnus-compat)
81 ;; gnus-compat.el ends here