Re: Emacs git-mode feature request: support fill-paragraph correctly

From: Bruce Stephens <bruce.stephens@isode.com>
Date: Jan 26, 2009, 19:11 UTC
Message-ID: <8063k1zxts.fsf@tiny.isode.net>
In-Reply-To: <87mydet0yg.fsf@write-only.cryp.to>

Peter Simons <simons@cryp.to> writes:

[...]

> The buffer is in "log-edit" mode.

Ah, OK.  That makes sense.

Show 6 quoted lines

>  > In that case you could stick this in your .emacs if you wanted to
>  > use message-mode:
>  >
>  > (setq auto-mode-alist (cons '("COMMIT_EDITMSG" . message-mode) auto-mode-alist))
>
> Unfortunately, it's not that easy.

True. I don't use git-mode (well, not much). I use git commit from the command line, which runs emacsclient as its editor.

> I'm not an Emacs expert, but I'd assume that switching into a
> different mode would change the meaning of C-c C-c.

Yep.  Quite likely other things, too.

OK, something like this:

(add-hook 'log-edit-mode-hook (lambda ()
		(let ((regexp "--text follows this line--$\\|[  ]*$\\|-- $\\|---+$\\|^\f$\\|.*wrote:$\\|\\(\\([         ]*[-_.[:word:]]+>+\\|[  ]*[]>|}+]\\)+\\)[  ]*$\\|<#!*/?\\(multipart\\|part\\|external\\|mml\\|secure\\)"))
                   (setq paragraph-start regexp
                         paragraph-separate regexp)))

I copied the regexp from the value in message-mode. (In a junk buffer use M-x message-mode, then C-h v paragraph-start and copy & paste.)

I imagine large parts of the regexp aren't relevant for your purposes so you could remove them if you wanted. You might also define a function rather than using lambda---that would make it a bit easier to test.