lisp/version.el

   1 ;;; version.el --- record version number of Emacs.
   2
   3 ;;; Copyright (C) 1985, 1992, 1994, 1995, 1999, 2000
   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 ;;; Code:
  27
  28 (defconst emacs-version "21.0.94" "\
  29 Version numbers of this version of Emacs.")
  30
  31 (defconst emacs-major-version
  32   (progn (string-match "^[0-9]+" emacs-version)
  33          (string-to-int (match-string 0 emacs-version)))
  34   "Major version number of this version of Emacs.
  35 This variable first existed in version 19.23.")
  36
  37 (defconst emacs-minor-version
  38   (progn (string-match "^[0-9]+\\.\\([0-9]+\\)" emacs-version)
  39          (string-to-int (match-string 1 emacs-version)))
  40   "Minor version number of this version of Emacs.
  41 This variable first existed in version 19.23.")
  42
  43 (defconst emacs-build-time (current-time) "\
  44 Time at which Emacs was dumped out.")
  45
  46 (defconst emacs-build-system (system-name))
  47
  48 (defun emacs-version  (&optional here) "\
  49 Return string describing the version of Emacs that is running.
  50 If optional argument HERE is non-nil, insert string at point.
  51 Don't use this function in programs to choose actions according
  52 to the system configuration; look at `system-configuration' instead."
  53   (interactive "P")
  54   (let ((version-string
  55          (format (if (not (interactive-p))
  56                      "GNU Emacs %s (%s%s)\n of %s on %s"
  57                    "GNU Emacs %s (%s%s) of %s on %s")
  58                  emacs-version
  59                  system-configuration
  60                  (cond ((featurep 'motif) ", Motif")
  61                        ((featurep 'x-toolkit) ", X toolkit")
  62                        (t ""))
  63                  (format-time-string "%a %Y-%m-%d" emacs-build-time)
  64                  emacs-build-system)))
  65     (if here
  66         (insert version-string)
  67       (if (interactive-p)
  68           (message "%s" version-string)
  69         version-string))))
  70
  71 ;;; We hope that this alias is easier for people to find.
  72 (defalias 'version 'emacs-version)
  73
  74 ;;; We put version info into the executable in the form that ident(1) uses.
  75 (or (memq system-type '(vax-vms windows-nt))
  76     (purecopy (concat "\n$Id: " (subst-char-in-string ?\n ? (emacs-version))
  77                       " $\n")))
  78
  79 ;;Local variables:
  80 ;;version-control: never
  81 ;;End:
  82
  83 ;;; version.el ends here