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

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

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