lisp/version.el

   1 ;;; version.el --- record version number of Emacs -*- no-byte-compile: t -*-
   2
   3 ;;; Copyright (C) 1985, 1992, 1994, 1995, 1999, 2000, 2001
   4 ;;;   Free Software Foundation, Inc.
   5
   6 ;; Maintainer: FSF
   7 ;; Keywords: internal
   8
   9 ;; This file is part of GNU Emacs.
  10
  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.
  15
  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.
  20
  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.
  25
  26 ;;; Commentary:
  27
  28 ;;; Code:
  29
  30 (defconst emacs-version "21.3.50" "\
  31 Version numbers of this version of Emacs.")
  32
  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.")
  38
  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.")
  44
  45 (defconst emacs-build-time (current-time) "\
  46 Time at which Emacs was dumped out.")
  47
  48 (defconst emacs-build-system (system-name))
  49
  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 'x-toolkit) ", X toolkit")
  65                        (t ""))
  66                  (if (and (boundp 'x-toolkit-scroll-bars)
  67                           (memq x-toolkit-scroll-bars '(xaw xaw3d)))
  68                      (format ", %s scroll bars"
  69                              (capitalize (symbol-name x-toolkit-scroll-bars)))
  70                    "")
  71                  (format-time-string "%Y-%m-%d" emacs-build-time)
  72                  emacs-build-system)))
  73     (if here
  74         (insert version-string)
  75       (if (interactive-p)
  76           (message "%s" version-string)
  77         version-string))))
  78
  79 ;; We hope that this alias is easier for people to find.
  80 (defalias 'version 'emacs-version)
  81
  82 ;; We put version info into the executable in the form that `ident' uses.
  83 (or (memq system-type '(vax-vms windows-nt))
  84     (purecopy (concat "\n$Id: " (subst-char-in-string ?\n ? (emacs-version))
  85                       " $\n")))
  86
  87 ;;Local variables:
  88 ;;version-control: never
  89 ;;End:
  90
  91 ;;; version.el ends here