From: Jeff King <peff@peff.net>
Date: Thu, 05 Jul 2007 13:58:24 GMT
Subject: Re: [PATCH 2/2] filter-branch: fail gracefully when a filter fails
Message-ID: <20070705135824.GB5493@sigill.intra.peff.net>
In-Reply-To: <Pine.LNX.4.64.0707041535420.4071@racer.site>

On Wed, Jul 04, 2007 at 03:36:01PM +0100, Johannes Schindelin wrote:

> 	It is slightly ugly that the output of msg-filter is written
> 	to a temporary file. But I do not know a better method to
> 	catch a failing msg-filter. Help?

If you mean, in general, to catch the exit code of the first part of a
pipe, you have to do something like this:

status=`((cmd1; echo $? >&3) | cmd2) 3>&1`

which is pretty ugly in itself, and if you want the stdout of cmd2, then
you have to add even more redirection. I'm not sure it's worth it.

-Peff