Re: git submodule should honor "-c credential.helper" command line argument

From: Jeff King <peff@peff.net>
Date: Feb 3, 2016, 04:25 UTC
Message-ID: <20160203042554.GA21179@sigill.intra.peff.net>
In-Reply-To: <56B0E3AA.30804@syntevo.com>

On Tue, Feb 02, 2016 at 06:13:14PM +0100, Marc Strapetz wrote:

Show 16 quoted lines

> git -c credential.helper=helper submodule update --init submodule
> 
> does not invoke "helper", but falls back to the default strategies.
> When configuring in ~/.gitconfig:
> 
> [credential]
>   helper=helper
> 
> git submodule update --init submodule
> 
> works fine. This behavior is somewhat unexpected -- is this a bug or by
> intention? In case intention, what's the recommended way to "inject"
> credentials helpers to work on submodules without modifying Git's config
> files?
> 
> Tested with Git 2.5.0 (Windows).

I think the problem is that when git "switches" to working in the submodule repository, it clears the environment, which includes any "-c" command switches. This makes sense for some situations, but not for others. This thread shows a similar problem:

  http://thread.gmane.org/gmane.comp.version-control.git/264840

Jens suggested there adding an option to tell clone to pass specific variables to the submodule, which I think makes sense. AFAIK, nobody has done any work yet on that approach.

-Peff