lisp/version.el

   1 ;;; version.el --- record version number of Emacs
   2
   3 ;; Copyright (C) 1985, 1992, 1994-1995, 1999-2012
   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 Name of the system on which Emacs was built.")
  45
  46 (defun emacs-version (&optional here) "\
  47 Return string describing the version of Emacs that is running.
  48 If optional argument HERE is non-nil, insert string at point.
  49 Don't use this function in programs to choose actions according
  50 to the system configuration; look at `system-configuration' instead."
  51   (interactive "P")
  52   (let ((version-string
  53          (format (if (not (called-interactively-p 'interactive))
  54                      "GNU Emacs %s (%s%s%s)\n of %s on %s"
  55                    "GNU Emacs %s (%s%s%s) of %s on %s")
  56                  emacs-version
  57                  system-configuration
  58                  (cond ((featurep 'motif)
  59                         (concat ", " (substring motif-version-string 4)))
  60                        ((featurep 'gtk)
  61                         (concat ", GTK+ Version " gtk-version-string))
  62                        ((featurep 'x-toolkit) ", X toolkit")
  63                        ((featurep 'ns)
  64                         (format ", NS %s" ns-version-string))
  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 (called-interactively-p 'interactive)
  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 (eq system-type 'windows-nt)
  84     (purecopy (concat "\n$Id: " (subst-char-in-string ?\n ?\s (emacs-version))
  85                       " $\n")))
  86
  87 ;; Local Variables:
  88 ;; version-control: never
  89 ;; no-byte-compile: t
  90 ;; End:
  91
  92 ;;; version.el ends here