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[emacs.git] / lisp / version.el
blobd489eeea02ea15233677680aeec17cd5d55dd264
1 ;;; version.el --- record version number of Emacs -*- no-byte-compile: t -*-
3 ;;; Copyright (C) 1985, 1992, 1994, 1995, 1999, 2000, 2001
4 ;;; Free Software Foundation, Inc.
6 ;; Maintainer: FSF
7 ;; Keywords: internal
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
26 ;;; Commentary:
28 ;;; Code:
30 (defconst emacs-version "21.3.50" "\
31 Version numbers of this version of Emacs.")
33 (defconst emacs-major-version
34 (progn (string-match "^[0-9]+" emacs-version)
35 (string-to-int (match-string 0 emacs-version)))
36 "Major version number of this version of Emacs.
37 This variable first existed in version 19.23.")
39 (defconst emacs-minor-version
40 (progn (string-match "^[0-9]+\\.\\([0-9]+\\)" emacs-version)
41 (string-to-int (match-string 1 emacs-version)))
42 "Minor version number of this version of Emacs.
43 This variable first existed in version 19.23.")
45 (defconst emacs-build-time (current-time) "\
46 Time at which Emacs was dumped out.")
48 (defconst emacs-build-system (system-name))
50 (defun emacs-version (&optional here) "\
51 Return string describing the version of Emacs that is running.
52 If optional argument HERE is non-nil, insert string at point.
53 Don't use this function in programs to choose actions according
54 to the system configuration; look at `system-configuration' instead."
55 (interactive "P")
56 (let ((version-string
57 (format (if (not (interactive-p))
58 "GNU Emacs %s (%s%s%s)\n of %s on %s"
59 "GNU Emacs %s (%s%s%s) of %s on %s")
60 emacs-version
61 system-configuration
62 (cond ((featurep 'motif)
63 (concat ", " (substring motif-version-string 4)))
64 ((featurep 'gtk)
65 (concat ", GTK+ Version " gtk-version-string))
66 ((featurep 'x-toolkit) ", X toolkit")
67 (t ""))
68 (if (and (boundp 'x-toolkit-scroll-bars)
69 (memq x-toolkit-scroll-bars '(xaw xaw3d)))
70 (format ", %s scroll bars"
71 (capitalize (symbol-name x-toolkit-scroll-bars)))
72 "")
73 (format-time-string "%Y-%m-%d" emacs-build-time)
74 emacs-build-system)))
75 (if here
76 (insert version-string)
77 (if (interactive-p)
78 (message "%s" version-string)
79 version-string))))
81 ;; We hope that this alias is easier for people to find.
82 (defalias 'version 'emacs-version)
84 ;; We put version info into the executable in the form that `ident' uses.
85 (or (memq system-type '(vax-vms windows-nt))
86 (purecopy (concat "\n$Id: " (subst-char-in-string ?\n ? (emacs-version))
87 " $\n")))
89 ;;Local variables:
90 ;;version-control: never
91 ;;End:
93 ;;; arch-tag: e60dc445-6218-4a4c-a7df-f15a818642a0
94 ;;; version.el ends here