# [PATCH] git.el: automatically revert emacs buffers

3 messages from 2008-01-21 to 2008-02-07. Participants: Sergei Organov, Alexandre Julliard.
Thread: https://gitlist.dev/t/11895

## Sergei Organov, 2008-01-21 18:07

Subject: [PATCH] git.el: automatically revert emacs buffers
Message-ID: <874pcnh4ej.fsf@osv.gnss.ru>
URL: https://gitlist.dev/e/874pcnh4ej.fsf%40osv.gnss.ru

```
If new custom variable git-auto-revert is 't', after git-revert-file,
revert corresponding emacs buffers from reverted files provided the
buffers were not changed. This is how pcl-cvs behaves.

* git-auto-revert: new customizable variable.
* git-revert-some-buffers: new function.
* git-revert-file: call git-revert-some-buffers.

Signed-off-by: Sergei Organov <osv@javad.com>
---
 contrib/emacs/git.el |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/contrib/emacs/git.el b/contrib/emacs/git.el
index d8a0638..c3c0c45 100644
--- a/contrib/emacs/git.el
+++ b/contrib/emacs/git.el
@@ -112,6 +112,11 @@ if there is already one that displays the same directory."
   :group 'git
   :type 'boolean)
 
+(defcustom git-auto-revert t
+  "Non-nil if `git-revert-file' should automatically revert corresponding buffers."
+  :group 'git
+  :type 'boolean)
+
 
 (defface git-status-face
   '((((class color) (background light)) (:foreground "purple"))
@@ -989,6 +994,23 @@ Return the list of files that haven't been handled."
           (git-success-message "Removed" files))
       (message "Aborting"))))
 
+;; stolen from pcl-cvs's cvs-revert-if-needed
+(defun git-revert-some-buffers (fis)
+  (dolist (fileinfo fis)
+    (let* ((file (git-fileinfo->name fileinfo))
+	   (buffer (find-buffer-visiting file)))
+      ;; For a revert to happen the user must be editing the file...
+      (unless (or (null buffer)
+		  (buffer-modified-p buffer))
+	(with-current-buffer buffer
+	  (ignore-errors
+	    (revert-buffer 'ignore-auto 'dont-ask 'preserve-modes)
+	    ;; `preserve-modes' avoids changing the (minor) modes.  But we
+	    ;; do want to reset the mode for VC, so we do it explicitly.
+	    (vc-find-file-hook)
+	    (when (eq (git-fileinfo->state fileinfo) 'unmerged)
+	      (smerge-mode 1))))))))
+
 (defun git-revert-file ()
   "Revert changes to the marked file(s)."
   (interactive)
@@ -1008,6 +1030,7 @@ Return the list of files that haven't been handled."
       (when modified
         (apply #'git-call-process-env nil nil "checkout" "HEAD" modified))
       (git-update-status-files (append added modified) 'uptodate)
+      (if git-auto-revert (git-revert-some-buffers files))
       (git-success-message "Reverted" (git-get-filenames files)))))
 
 (defun git-resolve-file ()
-- 
1.5.4.18.gd0b8

```

## Alexandre Julliard, 2008-02-07 12:57

Subject: Re: [PATCH] git.el: automatically revert emacs buffers
Message-ID: <87ir10q5yy.fsf@wine.dyndns.org>
URL: https://gitlist.dev/e/87ir10q5yy.fsf%40wine.dyndns.org
In-Reply-To: <874pcnh4ej.fsf@osv.gnss.ru>

```
Sergei Organov <osv@javad.com> writes:

> If new custom variable git-auto-revert is 't', after git-revert-file,
> revert corresponding emacs buffers from reverted files provided the
> buffers were not changed. This is how pcl-cvs behaves.
>
> * git-auto-revert: new customizable variable.
> * git-revert-some-buffers: new function.
> * git-revert-file: call git-revert-some-buffers.

I had implemented this a bit differently in the patch series I just
sent, I did it the VC way by also checking for modified buffers and
refusing to revert their corresponding files. I didn't add a custom
variable for it though, so I'll merge that part of your patch.

-- 
Alexandre Julliard
julliard@winehq.org

```

## Sergei Organov, 2008-02-07 13:03

Subject: Re: [PATCH] git.el: automatically revert emacs buffers
Message-ID: <87tzkk2a12.fsf@osv.gnss.ru>
URL: https://gitlist.dev/e/87tzkk2a12.fsf%40osv.gnss.ru
In-Reply-To: <87ir10q5yy.fsf@wine.dyndns.org>

```
Alexandre Julliard <julliard@winehq.org> writes:
> Sergei Organov <osv@javad.com> writes:
>
>> If new custom variable git-auto-revert is 't', after git-revert-file,
>> revert corresponding emacs buffers from reverted files provided the
>> buffers were not changed. This is how pcl-cvs behaves.
>>
>> * git-auto-revert: new customizable variable.
>> * git-revert-some-buffers: new function.
>> * git-revert-file: call git-revert-some-buffers.
>
> I had implemented this a bit differently in the patch series I just
> sent, I did it the VC way by also checking for modified buffers and
> refusing to revert their corresponding files. I didn't add a custom
> variable for it though, so I'll merge that part of your patch.

I don't think the custom variable is necessary. I added it only because
PCL-CVS had it, even though I didn't ever customize it in PCL-CVS. So
please feel free to drop my patch entirely.

-- Sergei Organov.

```