lisp/version.el

   1 ;;; version.el --- record version number of Emacs -*- no-byte-compile: t -*-
   2
   3 ;; Copyright (C) 1985, 1992, 1994-1995, 1999-2011
   4 ;;   Free Software Foundation, Inc.
   5
   6 ;; Maintainer: FSF
   7 ;; Keywords: internal
   8 ;; Package: emacs
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;; This file is loaded uncompiled when dumping Emacs.
  28 ;; Doc-strings should adhere to the conventions of make-docfile.
  29
  30 ;;; Code:
  31
  32 (defconst emacs-major-version (progn (string-match "^[0-9]+" emacs-version) (string-to-number (match-string 0 emacs-version))) "\
  33 Major version number of this version of Emacs.
  34 This variable first existed in version 19.23.")
  35
  36 (defconst emacs-minor-version (progn (string-match "^[0-9]+\\.\\([0-9]+\\)" emacs-version) (string-to-number (match-string 1 emacs-version))) "\
  37 Minor version number of this version of Emacs.
  38 This variable first existed in version 19.23.")
  39
  40 (defconst emacs-build-time (current-time) "\
  41 Time at which Emacs was dumped out.")
  42
  43 (defconst emacs-build-system (system-name))
  44
  45 (defun emacs-version (&optional here) "\
  46 Return string describing the version of Emacs that is running.
  47 If optional argument HERE is non-nil, insert string at point.
  48 Don't use this function in programs to choose actions according
  49 to the system configuration; look at `system-configuration' instead."
  50   (interactive "P")
  51   (let ((version-string
  52          (format (if (not (called-interactively-p 'interactive))
  53                      "GNU Emacs %s (%s%s%s)\n of %s on %s"
  54                    "GNU Emacs %s (%s%s%s) of %s on %s")
  55                  emacs-version
  56                  system-configuration
  57                  (cond ((featurep 'motif)
  58                         (concat ", " (substring motif-version-string 4)))
  59                        ((featurep 'gtk)
  60                         (concat ", GTK+ Version " gtk-version-string))
  61                        ((featurep 'x-toolkit) ", X toolkit")
  62                        ((featurep 'ns)
  63                         (format ", NS %s" ns-version-string))
  64                        (t ""))
  65                  (if (and (boundp 'x-toolkit-scroll-bars)
  66                           (memq x-toolkit-scroll-bars '(xaw xaw3d)))
  67                      (format ", %s scroll bars"
  68                              (capitalize (symbol-name x-toolkit-scroll-bars)))
  69                    "")
  70                  (format-time-string "%Y-%m-%d" emacs-build-time)
  71                  emacs-build-system)))
  72     (if here
  73         (insert version-string)
  74       (if (called-interactively-p 'interactive)
  75           (message "%s" version-string)
  76         version-string))))
  77
  78 ;; We hope that this alias is easier for people to find.
  79 (defalias 'version 'emacs-version)
  80
  81 ;; We put version info into the executable in the form that `ident' uses.
  82 (or (eq system-type 'windows-nt)
  83     (purecopy (concat "\n$Id: " (subst-char-in-string ?\n ?\s (emacs-version))
  84                       " $\n")))
  85
  86 ;;Local variables:
  87 ;;version-control: never
  88 ;;End:
  89
  90 ;;; version.el ends here