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60370d40 | 1 | ;;; em-banner.el --- sample module that displays a login banner |
affbf647 | 2 | |
3146b070 | 3 | ;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
114f9c96 | 4 | ;; 2008, 2009, 2010 Free Software Foundation, Inc. |
affbf647 | 5 | |
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6 | ;; Author: John Wiegley <johnw@gnu.org> |
7 | ||
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8 | ;; This file is part of GNU Emacs. |
9 | ||
4ee57b2a | 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
affbf647 | 11 | ;; it under the terms of the GNU General Public License as published by |
4ee57b2a GM |
12 | ;; the Free Software Foundation, either version 3 of the License, or |
13 | ;; (at your option) any later version. | |
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14 | |
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. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
4ee57b2a | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
affbf647 | 22 | |
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23 | ;;; Commentary: |
24 | ||
25 | ;; There is nothing to be done or configured in order to use this | |
26 | ;; module, other than to select it by customizing the variable | |
27 | ;; `eshell-modules-list'. It will then display a version information | |
28 | ;; message whenever Eshell is loaded. | |
29 | ;; | |
30 | ;; This code is only an example of a how to write a well-formed | |
31 | ;; extension module for Eshell. The better way to display login text | |
32 | ;; is to use the `eshell-script' module, and to echo the desired | |
33 | ;; strings from the user's `eshell-login-script' file. | |
34 | ;; | |
35 | ;; There is one configuration variable, which demonstrates how to | |
36 | ;; properly define a customization variable in an extension module. | |
37 | ;; In this case, it allows the user to change the string which | |
38 | ;; displays at login time. | |
39 | ||
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40 | ;;; Code: |
41 | ||
42 | (eval-when-compile | |
43 | (require 'cl) | |
44 | (require 'esh-mode) | |
45 | (require 'eshell)) | |
46 | ||
47 | (require 'esh-util) | |
48 | ||
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49 | ;;;###autoload |
50 | (eshell-defgroup eshell-banner nil | |
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51 | "This sample module displays a welcome banner at login. |
52 | It exists so that others wishing to create their own Eshell extension | |
53 | modules may have a simple template to begin with." | |
54 | :tag "Login banner" | |
55 | ;; :link '(info-link "(eshell)Login banner") | |
56 | :group 'eshell-module) | |
57 | ||
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58 | ;;; User Variables: |
59 | ||
60 | (defcustom eshell-banner-message "Welcome to the Emacs shell\n\n" | |
ec60da52 | 61 | "The banner message to be displayed when Eshell is loaded. |
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62 | This can be any sexp, and should end with at least two newlines." |
63 | :type 'sexp | |
64 | :group 'eshell-banner) | |
65 | ||
66 | (put 'eshell-banner-message 'risky-local-variable t) | |
67 | ||
affbf647 | 68 | (defcustom eshell-banner-load-hook '(eshell-banner-initialize) |
ec60da52 | 69 | "A list of functions to run when `eshell-banner' is loaded." |
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70 | :type 'hook |
71 | :group 'eshell-banner) | |
72 | ||
73 | (defun eshell-banner-initialize () | |
74 | "Output a welcome banner on initialization." | |
75 | ;; it's important to use `eshell-interactive-print' rather than | |
76 | ;; `insert', because `insert' doesn't know how to interact with the | |
77 | ;; I/O code used by Eshell | |
78 | (unless eshell-non-interactive-p | |
79 | (assert eshell-mode) | |
80 | (assert eshell-banner-message) | |
81 | (let ((msg (eval eshell-banner-message))) | |
82 | (assert msg) | |
83 | (eshell-interactive-print msg)))) | |
84 | ||
85 | (eshell-deftest banner banner-displayed | |
86 | "Startup banner is displayed at point-min" | |
87 | (assert eshell-banner-message) | |
88 | (let ((msg (eval eshell-banner-message))) | |
89 | (assert msg) | |
90 | (goto-char (point-min)) | |
91 | (looking-at msg))) | |
92 | ||
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93 | (provide 'em-banner) |
94 | ||
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95 | ;; Local Variables: |
96 | ;; generated-autoload-file: "esh-groups.el" | |
97 | ;; End: | |
98 | ||
cbee283d | 99 | ;; arch-tag: e738b4ef-8671-42ae-a757-291779b92491 |
affbf647 | 100 | ;;; em-banner.el ends here |