;;; version.el --- record version number of Emacs
-;; Copyright (C) 1985, 1992, 1994-1995, 1999-2013 Free Software
+;; Copyright (C) 1985, 1992, 1994-1995, 1999-2015 Free Software
;; Foundation, Inc.
-;; Maintainer: FSF
+;; Maintainer: emacs-devel@gnu.org
;; Keywords: internal
;; Package: emacs
(defalias 'version 'emacs-version)
;; Set during dumping, this is a defvar so that it can be setq'd.
-(defvar emacs-bzr-version nil
- "String giving the bzr revision from which this Emacs was built.
-The format is: [revno] revision_id, where revno may be absent.
-Value is nil if Emacs was not built from a bzr checkout, or if we could
-not determine the revision.")
-
-(defun emacs-bzr-version-dirstate (dir)
- "Try to return as a string the bzr revision ID of directory DIR.
-This uses the dirstate file's parent revision entry.
-Returns nil if unable to find this information."
- (let ((file (expand-file-name ".bzr/checkout/dirstate" dir)))
- (when (file-readable-p file)
- (with-temp-buffer
- (insert-file-contents file)
- (and (looking-at "#bazaar dirstate flat format 3")
- (forward-line 3)
- (looking-at "[0-9]+\0\\([^\0\n]+\\)\0")
- (match-string 1))))))
-
-(defun emacs-bzr-version-bzr (_dir)
- "Ask bzr itself for the version information for directory DIR."
- ;; Comments on `bzr version-info':
- ;; i) Unknown files also cause clean != 1.
- ;; ii) It can be slow, contacting the upstream repo to get the
- ;; branch nick if one is not set locally, even with a custom
- ;; template that is not asking for the nick (as used here). You'd
- ;; think the latter part would be trivial to fix:
- ;; https://bugs.launchpad.net/bzr/+bug/882541/comments/3
- ;; https://bugs.launchpad.net/bzr/+bug/629150
- ;; You can set the nick locally with `bzr nick ...', which speeds
- ;; things up enormously. `bzr revno' does not have this issue, but
- ;; has no way to print the revision_id AFAICS.
- (message "Waiting for bzr...")
- (with-temp-buffer
- (if (zerop
- (call-process "bzr" nil '(t nil) nil "version-info"
- "--custom"
- "--template={revno} {revision_id} (clean = {clean})"
- "dir"))
- (buffer-string))))
-
-(defun emacs-bzr-get-version (&optional dir external)
- "Try to return as a string the bzr revision of the Emacs sources.
-The format is: [revno] revision_id, where revno may be absent.
-Value is nil if the sources do not seem to be under bzr, or if we could
-not determine the revision. Note that this reports on the current state
-of the sources, which may not correspond to the running Emacs.
-
-Optional argument DIR is a directory to use instead of `source-directory'.
-Optional argument EXTERNAL non-nil means to maybe ask `bzr' itself,
-if the sources appear to be under bzr. If `force', always ask bzr.
-Otherwise only ask bzr if we cannot find any information ourselves."
+(defvar emacs-repository-version nil
+ "String giving the repository revision from which this Emacs was built.
+Value is nil if Emacs was not built from a repository checkout,
+or if we could not determine the revision.")
+
+(define-obsolete-variable-alias 'emacs-bzr-version
+ 'emacs-repository-version "24.4")
+
+(define-obsolete-function-alias 'emacs-bzr-get-version
+ 'emacs-repository-get-version "24.4")
+
+(defun emacs-repository-get-version (&optional dir external)
+ "Try to return as a string the repository revision of the Emacs sources.
+The format of the returned string is dependent on the VCS in use.
+Value is nil if the sources do not seem to be under version
+control, or if we could not determine the revision. Note that
+this reports on the current state of the sources, which may not
+correspond to the running Emacs.
+
+Optional argument DIR is a directory to use instead of
+`source-directory'. Optional argument EXTERNAL is ignored and is
+retained for compatibility."
(or dir (setq dir source-directory))
- (when (file-directory-p (expand-file-name ".bzr/branch" dir))
- (if (eq external 'force)
- (emacs-bzr-version-bzr dir)
- (let (file loc rev)
- (cond ((file-readable-p
- (setq file (expand-file-name ".bzr/branch/last-revision" dir)))
- (with-temp-buffer
- (insert-file-contents file)
- (goto-char (point-max))
- (if (looking-back "\n")
- (delete-char -1))
- (buffer-string)))
- ;; OK, no last-revision. Is it a lightweight checkout?
- ((file-readable-p
- (setq file (expand-file-name ".bzr/branch/location" dir)))
- (setq rev (emacs-bzr-version-dirstate dir))
- ;; If the parent branch is local, try looking there for the rev.
- ;; Note: there is no guarantee that the parent branch's rev
- ;; corresponds to this branch. This branch could have
- ;; been made with a specific -r revno argument, or the
- ;; parent could have been updated since this branch was created.
- ;; To try and detect this, we check the dirstate revids
- ;; to see if they match.
- (if (and (setq loc (with-temp-buffer
- (insert-file-contents file)
- (if (looking-at "file://\\(.*\\)")
- (match-string 1))))
- (equal rev (emacs-bzr-version-dirstate loc)))
- (emacs-bzr-get-version loc)
- ;; If parent does not match, the best we can do without
- ;; calling external commands is to use the dirstate rev.
- rev))
- (external
- (emacs-bzr-version-bzr dir)))))))
+ (cond ((file-directory-p (expand-file-name ".git" dir))
+ (message "Waiting for git...")
+ (with-temp-buffer
+ (let ((default-directory (file-name-as-directory dir)))
+ (and (eq 0
+ (condition-case nil
+ (call-process "git" nil '(t nil) nil "rev-parse"
+ "HEAD")
+ (error nil)))
+ (not (zerop (buffer-size)))
+ (replace-regexp-in-string "\n" "" (buffer-string))))))))
;; We put version info into the executable in the form that `ident' uses.
(purecopy (concat "\n$Id: " (subst-char-in-string ?\n ?\s (emacs-version))