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author | Gerd Moellmann <gerd@gnu.org> | 2000-06-23 05:24:10 +0000 |
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committer | Gerd Moellmann <gerd@gnu.org> | 2000-06-23 05:24:10 +0000 |
commit | affbf6477576c38d98111b55fbb1eb5b13d1a735 (patch) | |
tree | e7cccedd38944fc20cf2d20a3949246d8d558bf7 /lisp/eshell/em-banner.el | |
parent | 022499fab948938bb763c2a33a8c5ba0c5969fcd (diff) | |
download | emacs-affbf6477576c38d98111b55fbb1eb5b13d1a735.tar.gz |
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Diffstat (limited to 'lisp/eshell/em-banner.el')
-rw-r--r-- | lisp/eshell/em-banner.el | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/lisp/eshell/em-banner.el b/lisp/eshell/em-banner.el new file mode 100644 index 00000000000..f56bef25503 --- /dev/null +++ b/lisp/eshell/em-banner.el @@ -0,0 +1,90 @@ +;;; em-banner --- sample module that displays a login banner + +;; Copyright (C) 1999, 2000 Free Sofware Foundation + +;; This file is part of GNU Emacs. + +;; GNU Emacs 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. + +;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the +;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, +;; Boston, MA 02111-1307, USA. + +(provide 'em-banner) + +(eval-when-compile (require 'esh-maint)) + +(defgroup eshell-banner nil + "This sample module displays a welcome banner at login. +It exists so that others wishing to create their own Eshell extension +modules may have a simple template to begin with." + :tag "Login banner" + :link '(info-link "(eshell.info)Login banner") + :group 'eshell-module) + +;;; Commentary: + +;; There is nothing to be done or configured in order to use this +;; module, other than to select it by customizing the variable +;; `eshell-modules-list'. It will then display a version information +;; message whenever Eshell is loaded. +;; +;; This code is only an example of a how to write a well-formed +;; extension module for Eshell. The better way to display login text +;; is to use the `eshell-script' module, and to echo the desired +;; strings from the user's `eshell-login-script' file. +;; +;; There is one configuration variable, which demonstrates how to +;; properly define a customization variable in an extension module. +;; In this case, it allows the user to change the string which +;; displays at login time. + +;;; User Variables: + +(defcustom eshell-banner-message "Welcome to the Emacs shell\n\n" + "*The banner message to be displayed when Eshell is loaded. +This can be any sexp, and should end with at least two newlines." + :type 'sexp + :group 'eshell-banner) + +(put 'eshell-banner-message 'risky-local-variable t) + +;;; Code: + +(require 'esh-util) + +(defcustom eshell-banner-load-hook '(eshell-banner-initialize) + "*A list of functions to run when `eshell-banner' is loaded." + :type 'hook + :group 'eshell-banner) + +(defun eshell-banner-initialize () + "Output a welcome banner on initialization." + ;; it's important to use `eshell-interactive-print' rather than + ;; `insert', because `insert' doesn't know how to interact with the + ;; I/O code used by Eshell + (unless eshell-non-interactive-p + (assert eshell-mode) + (assert eshell-banner-message) + (let ((msg (eval eshell-banner-message))) + (assert msg) + (eshell-interactive-print msg)))) + +(eshell-deftest banner banner-displayed + "Startup banner is displayed at point-min" + (assert eshell-banner-message) + (let ((msg (eval eshell-banner-message))) + (assert msg) + (goto-char (point-min)) + (looking-at msg))) + +;;; em-banner.el ends here |