From: Alexandre Julliard Date: Sat, 4 Mar 2006 14:32:19 +0000 (+0100) Subject: contrib/emacs: Add an Emacs VC backend. X-Git-Tag: v1.3.0-rc1~51^2~6 X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=486a974acce1bd560ae8edc1895ff91253271675;p=git.git contrib/emacs: Add an Emacs VC backend. Add a basic Emacs VC backend. It currently supports the following commands: checkin, checkout, diff, log, revert, and annotate. There is only limited support for working with revisions other than HEAD. Signed-off-by: Alexandre Julliard Signed-off-by: Junio C Hamano --- diff --git a/contrib/emacs/vc-git.el b/contrib/emacs/vc-git.el new file mode 100644 index 000000000..2453cdcfa --- /dev/null +++ b/contrib/emacs/vc-git.el @@ -0,0 +1,135 @@ +;;; vc-git.el --- VC backend for the git version control system + +;; Copyright (C) 2006 Alexandre Julliard + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the GNU General Public License as +;; published by the Free Software Foundation; either version 2 of +;; the License, or (at your option) any later version. +;; +;; This program is distributed in the hope that it will be +;; useful, but WITHOUT ANY WARRANTY; without even the implied +;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR +;; PURPOSE. See the GNU General Public License for more details. +;; +;; You should have received a copy of the GNU General Public +;; License along with this program; if not, write to the Free +;; Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, +;; MA 02111-1307 USA + +;;; Commentary: + +;; This file contains a VC backend for the git version control +;; system. +;; +;; To install: put this file on the load-path and add GIT to the list +;; of supported backends in `vc-handled-backends'. +;; +;; TODO +;; - changelog generation +;; - working with revisions other than HEAD +;; + +(defvar git-commits-coding-system 'utf-8 + "Default coding system for git commits.") + +(defun vc-git--run-command-string (file &rest args) + "Run a git command on FILE and return its output as string." + (let* ((ok t) + (str (with-output-to-string + (with-current-buffer standard-output + (unless (eq 0 (apply #'call-process "git" nil '(t nil) nil + (append args (list (file-relative-name file))))) + (setq ok nil)))))) + (and ok str))) + +(defun vc-git--run-command (file &rest args) + "Run a git command on FILE, discarding any output." + (let ((name (file-relative-name file))) + (eq 0 (apply #'call-process "git" nil (get-buffer "*Messages") nil (append args (list name)))))) + +(defun vc-git-registered (file) + "Check whether FILE is registered with git." + (with-temp-buffer + (let* ((dir (file-name-directory file)) + (name (file-relative-name file dir))) + (when dir (cd dir)) + (and (eq 0 (call-process "git" nil '(t nil) nil "ls-files" "-c" "-z" "--" name)) + (let ((str (buffer-string))) + (and (> (length str) (length name)) + (string= (substring str 0 (1+ (length name))) (concat name "\0")))))))) + +(defun vc-git-state (file) + "git-specific version of `vc-state'." + (let ((diff (vc-git--run-command-string file "diff-index" "-z" "HEAD" "--"))) + (if (and diff (string-match ":[0-7]\\{6\\} [0-7]\\{6\\} [0-9a-f]\\{40\\} [0-9a-f]\\{40\\} [ADMU]\0[^\0]+\0" diff)) + 'edited + 'up-to-date))) + +(defun vc-git-workfile-version (file) + "git-specific version of `vc-workfile-version'." + (let ((str (with-output-to-string + (with-current-buffer standard-output + (call-process "git" nil '(t nil) nil "symbolic-ref" "HEAD"))))) + (if (string-match "^\\(refs/heads/\\)?\\(.+\\)$" str) + (match-string 2 str) + str))) + +(defun vc-git-revert (file &optional contents-done) + "Revert FILE to the version stored in the git repository." + (if contents-done + (vc-git--run-command file "update-index" "--") + (vc-git--run-command file "checkout" "HEAD"))) + +(defun vc-git-checkout-model (file) + 'implicit) + +(defun vc-git-workfile-unchanged-p (file) + (let ((sha1 (vc-git--run-command-string file "hash-object" "--")) + (head (vc-git--run-command-string file "ls-tree" "-z" "HEAD" "--"))) + (and head + (string-match "[0-7]\\{6\\} blob \\([0-9a-f]\\{40\\}\\)\t[^\0]+\0" head) + (string= (car (split-string sha1 "\n")) (match-string 1 head))))) + +(defun vc-git-register (file &optional rev comment) + "Register FILE into the git version-control system." + (vc-git--run-command file "update-index" "--add" "--")) + +(defun vc-git-print-log (file) + (let ((name (file-relative-name file)) + (coding-system-for-read git-commits-coding-system)) + (vc-do-command nil 'async "git" name "rev-list" "--pretty" "HEAD" "--"))) + +(defun vc-git-diff (file &optional rev1 rev2) + (let ((name (file-relative-name file))) + (if (and rev1 rev2) + (vc-do-command "*vc-diff*" 0 "git" name "diff-tree" "-p" rev1 rev2 "--") + (vc-do-command "*vc-diff*" 0 "git" name "diff-index" "-p" (or rev1 "HEAD") "--")) + ; git-diff-index doesn't set exit status like diff does + (if (vc-git-workfile-unchanged-p file) 0 1))) + +(defun vc-git-checkin (file rev comment) + (let ((coding-system-for-write git-commits-coding-system)) + (vc-git--run-command file "commit" "-m" comment "--only" "--"))) + +(defun vc-git-checkout (file &optional editable rev destfile) + (vc-git--run-command file "checkout" (or rev "HEAD"))) + +(defun vc-git-annotate-command (file buf &optional rev) + ; FIXME: rev is ignored + (let ((name (file-relative-name file))) + (call-process "git" nil buf nil "annotate" name))) + +(defun vc-git-annotate-time () + (and (re-search-forward "[0-9a-f]+\t(.*\t\\([0-9]+\\)-\\([0-9]+\\)-\\([0-9]+\\) \\([0-9]+\\):\\([0-9]+\\):\\([0-9]+\\) \\([-+0-9]+\\)\t[0-9]+)" nil t) + (vc-annotate-convert-time + (apply #'encode-time (mapcar (lambda (match) (string-to-number (match-string match))) '(6 5 4 3 2 1 7)))))) + +;; Not really useful since we can't do anything with the revision yet +;;(defun vc-annotate-extract-revision-at-line () +;; (save-excursion +;; (move-beginning-of-line 1) +;; (and (looking-at "[0-9a-f]+") +;; (buffer-substring (match-beginning 0) (match-end 0))))) + +(provide 'vc-git)