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98 lines
3.3 KiB
EmacsLisp
98 lines
3.3 KiB
EmacsLisp
;;; em-banner.el --- sample module that displays a login banner
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;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004,
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;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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;; Author: John Wiegley <johnw@gnu.org>
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;; There is nothing to be done or configured in order to use this
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;; module, other than to select it by customizing the variable
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;; `eshell-modules-list'. It will then display a version information
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;; message whenever Eshell is loaded.
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;;
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;; This code is only an example of a how to write a well-formed
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;; extension module for Eshell. The better way to display login text
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;; is to use the `eshell-script' module, and to echo the desired
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;; strings from the user's `eshell-login-script' file.
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;;
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;; There is one configuration variable, which demonstrates how to
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;; properly define a customization variable in an extension module.
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;; In this case, it allows the user to change the string which
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;; displays at login time.
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;;; Code:
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(eval-when-compile
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(require 'cl)
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(require 'esh-mode)
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(require 'eshell))
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(require 'esh-util)
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(defgroup eshell-banner nil
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"This sample module displays a welcome banner at login.
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It exists so that others wishing to create their own Eshell extension
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modules may have a simple template to begin with."
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:tag "Login banner"
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;; :link '(info-link "(eshell)Login banner")
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:group 'eshell-module)
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;;; User Variables:
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(defcustom eshell-banner-message "Welcome to the Emacs shell\n\n"
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"*The banner message to be displayed when Eshell is loaded.
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This can be any sexp, and should end with at least two newlines."
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:type 'sexp
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:group 'eshell-banner)
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(put 'eshell-banner-message 'risky-local-variable t)
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(defcustom eshell-banner-load-hook '(eshell-banner-initialize)
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"*A list of functions to run when `eshell-banner' is loaded."
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:type 'hook
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:group 'eshell-banner)
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(defun eshell-banner-initialize ()
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"Output a welcome banner on initialization."
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;; it's important to use `eshell-interactive-print' rather than
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;; `insert', because `insert' doesn't know how to interact with the
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;; I/O code used by Eshell
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(unless eshell-non-interactive-p
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(assert eshell-mode)
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(assert eshell-banner-message)
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(let ((msg (eval eshell-banner-message)))
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(assert msg)
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(eshell-interactive-print msg))))
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(eshell-deftest banner banner-displayed
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"Startup banner is displayed at point-min"
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(assert eshell-banner-message)
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(let ((msg (eval eshell-banner-message)))
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(assert msg)
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(goto-char (point-min))
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(looking-at msg)))
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(provide 'em-banner)
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;;; arch-tag: e738b4ef-8671-42ae-a757-291779b92491
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;;; em-banner.el ends here
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