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758c81e8 | 1 | ;;; version.el --- record version number of Emacs |
6edcb099 | 2 | |
ab422c4d PE |
3 | ;; Copyright (C) 1985, 1992, 1994-1995, 1999-2013 Free Software |
4 | ;; Foundation, Inc. | |
6edcb099 DL |
5 | |
6 | ;; Maintainer: FSF | |
7 | ;; Keywords: internal | |
bd78fa1d | 8 | ;; Package: emacs |
6edcb099 DL |
9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
eb3fa2cf | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
6edcb099 | 13 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
6edcb099 DL |
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 | |
eb3fa2cf | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
6edcb099 | 24 | |
55535639 PJ |
25 | ;;; Commentary: |
26 | ||
6edcb099 DL |
27 | ;;; Code: |
28 | ||
758c81e8 GM |
29 | (defconst emacs-major-version |
30 | (progn (string-match "^[0-9]+" emacs-version) | |
31 | (string-to-number (match-string 0 emacs-version))) | |
32 | "Major version number of this version of Emacs. | |
6edcb099 DL |
33 | This variable first existed in version 19.23.") |
34 | ||
758c81e8 GM |
35 | (defconst emacs-minor-version |
36 | (progn (string-match "^[0-9]+\\.\\([0-9]+\\)" emacs-version) | |
37 | (string-to-number (match-string 1 emacs-version))) | |
38 | "Minor version number of this version of Emacs. | |
6edcb099 DL |
39 | This variable first existed in version 19.23.") |
40 | ||
758c81e8 GM |
41 | (defconst emacs-build-time (current-time) |
42 | "Time at which Emacs was dumped out.") | |
6edcb099 | 43 | |
758c81e8 GM |
44 | (defconst emacs-build-system (system-name) |
45 | "Name of the system on which Emacs was built.") | |
6edcb099 | 46 | |
694ea8e3 JB |
47 | (defvar motif-version-string) |
48 | (defvar gtk-version-string) | |
49 | (defvar ns-version-string) | |
50 | ||
758c81e8 GM |
51 | (defun emacs-version (&optional here) |
52 | "Return string describing the version of Emacs that is running. | |
6edcb099 DL |
53 | If optional argument HERE is non-nil, insert string at point. |
54 | Don't use this function in programs to choose actions according | |
55 | to the system configuration; look at `system-configuration' instead." | |
56 | (interactive "P") | |
f1180544 | 57 | (let ((version-string |
32226619 | 58 | (format (if (not (called-interactively-p 'interactive)) |
7262075d GM |
59 | "GNU Emacs %s (%s%s%s)\n of %s on %s" |
60 | "GNU Emacs %s (%s%s%s) of %s on %s") | |
6edcb099 DL |
61 | emacs-version |
62 | system-configuration | |
f1180544 | 63 | (cond ((featurep 'motif) |
fdbccd8b | 64 | (concat ", " (substring motif-version-string 4))) |
09d685fb LK |
65 | ((featurep 'gtk) |
66 | (concat ", GTK+ Version " gtk-version-string)) | |
64bd6fd1 | 67 | ((featurep 'x-toolkit) ", X toolkit") |
601fb9b8 | 68 | ((featurep 'ns) |
cb83c00b | 69 | (format ", NS %s" ns-version-string)) |
6edcb099 | 70 | (t "")) |
3fac5d64 GM |
71 | (if (and (boundp 'x-toolkit-scroll-bars) |
72 | (memq x-toolkit-scroll-bars '(xaw xaw3d))) | |
73 | (format ", %s scroll bars" | |
74 | (capitalize (symbol-name x-toolkit-scroll-bars))) | |
75 | "") | |
82b90229 | 76 | (format-time-string "%Y-%m-%d" emacs-build-time) |
6edcb099 | 77 | emacs-build-system))) |
f1180544 | 78 | (if here |
6edcb099 | 79 | (insert version-string) |
32226619 | 80 | (if (called-interactively-p 'interactive) |
6edcb099 DL |
81 | (message "%s" version-string) |
82 | version-string)))) | |
83 | ||
c979fbdf | 84 | ;; We hope that this alias is easier for people to find. |
6edcb099 DL |
85 | (defalias 'version 'emacs-version) |
86 | ||
a1ed8b05 | 87 | ;; Set during dumping, this is a defvar so that it can be setq'd. |
758c81e8 GM |
88 | (defvar emacs-bzr-version nil |
89 | "String giving the bzr revision from which this Emacs was built. | |
f40a9709 | 90 | The format is: [revno] revision_id, where revno may be absent. |
539aa513 | 91 | Value is nil if Emacs was not built from a bzr checkout, or if we could |
a1ed8b05 GM |
92 | not determine the revision.") |
93 | ||
f40a9709 GM |
94 | (defun emacs-bzr-version-dirstate (dir) |
95 | "Try to return as a string the bzr revision ID of directory DIR. | |
96 | This uses the dirstate file's parent revision entry. | |
97 | Returns nil if unable to find this information." | |
98 | (let ((file (expand-file-name ".bzr/checkout/dirstate" dir))) | |
99 | (when (file-readable-p file) | |
100 | (with-temp-buffer | |
101 | (insert-file-contents file) | |
102 | (and (looking-at "#bazaar dirstate flat format 3") | |
103 | (forward-line 3) | |
104 | (looking-at "[0-9]+\0\\([^\0\n]+\\)\0") | |
105 | (match-string 1)))))) | |
106 | ||
9d3aa82c | 107 | (defun emacs-bzr-version-bzr (_dir) |
72aa16e1 GM |
108 | "Ask bzr itself for the version information for directory DIR." |
109 | ;; Comments on `bzr version-info': | |
110 | ;; i) Unknown files also cause clean != 1. | |
111 | ;; ii) It can be slow, contacting the upstream repo to get the | |
112 | ;; branch nick if one is not set locally, even with a custom | |
113 | ;; template that is not asking for the nick (as used here). You'd | |
114 | ;; think the latter part would be trivial to fix: | |
115 | ;; https://bugs.launchpad.net/bzr/+bug/882541/comments/3 | |
116 | ;; https://bugs.launchpad.net/bzr/+bug/629150 | |
117 | ;; You can set the nick locally with `bzr nick ...', which speeds | |
118 | ;; things up enormously. `bzr revno' does not have this issue, but | |
119 | ;; has no way to print the revision_id AFAICS. | |
120 | (message "Waiting for bzr...") | |
121 | (with-temp-buffer | |
122 | (if (zerop | |
123 | (call-process "bzr" nil '(t nil) nil "version-info" | |
124 | "--custom" | |
125 | "--template={revno} {revision_id} (clean = {clean})" | |
126 | "dir")) | |
127 | (buffer-string)))) | |
128 | ||
129 | (defun emacs-bzr-get-version (&optional dir external) | |
f40a9709 GM |
130 | "Try to return as a string the bzr revision of the Emacs sources. |
131 | The format is: [revno] revision_id, where revno may be absent. | |
539aa513 | 132 | Value is nil if the sources do not seem to be under bzr, or if we could |
a1ed8b05 | 133 | not determine the revision. Note that this reports on the current state |
263f20cd GM |
134 | of the sources, which may not correspond to the running Emacs. |
135 | ||
72aa16e1 GM |
136 | Optional argument DIR is a directory to use instead of `source-directory'. |
137 | Optional argument EXTERNAL non-nil means to maybe ask `bzr' itself, | |
138 | if the sources appear to be under bzr. If `force', always ask bzr. | |
139 | Otherwise only ask bzr if we cannot find any information ourselves." | |
263f20cd | 140 | (or dir (setq dir source-directory)) |
fea895b1 | 141 | (when (file-directory-p (expand-file-name ".bzr/branch" dir)) |
72aa16e1 GM |
142 | (if (eq external 'force) |
143 | (emacs-bzr-version-bzr dir) | |
144 | (let (file loc rev) | |
145 | (cond ((file-readable-p | |
146 | (setq file (expand-file-name ".bzr/branch/last-revision" dir))) | |
147 | (with-temp-buffer | |
148 | (insert-file-contents file) | |
149 | (goto-char (point-max)) | |
150 | (if (looking-back "\n") | |
151 | (delete-char -1)) | |
152 | (buffer-string))) | |
153 | ;; OK, no last-revision. Is it a lightweight checkout? | |
154 | ((file-readable-p | |
155 | (setq file (expand-file-name ".bzr/branch/location" dir))) | |
156 | (setq rev (emacs-bzr-version-dirstate dir)) | |
157 | ;; If the parent branch is local, try looking there for the rev. | |
158 | ;; Note: there is no guarantee that the parent branch's rev | |
159 | ;; corresponds to this branch. This branch could have | |
160 | ;; been made with a specific -r revno argument, or the | |
161 | ;; parent could have been updated since this branch was created. | |
162 | ;; To try and detect this, we check the dirstate revids | |
163 | ;; to see if they match. | |
164 | (if (and (setq loc (with-temp-buffer | |
165 | (insert-file-contents file) | |
166 | (if (looking-at "file://\\(.*\\)") | |
167 | (match-string 1)))) | |
168 | (equal rev (emacs-bzr-version-dirstate loc))) | |
169 | (emacs-bzr-get-version loc) | |
170 | ;; If parent does not match, the best we can do without | |
171 | ;; calling external commands is to use the dirstate rev. | |
172 | rev)) | |
173 | (external | |
174 | (emacs-bzr-version-bzr dir))))))) | |
a1ed8b05 | 175 | |
e6abda02 | 176 | ;; We put version info into the executable in the form that `ident' uses. |
6cf2a23e EZ |
177 | (purecopy (concat "\n$Id: " (subst-char-in-string ?\n ?\s (emacs-version)) |
178 | " $\n")) | |
6edcb099 | 179 | |
6edcb099 | 180 | ;;; version.el ends here |