Re: [PATCHv10 5/7] git submodule update: have a dedicated helper for cloning

> This introduces a new helper function in git submodule--helper
> which takes care of cloning all submodules, which we want to
> parallelize eventually.
>
> Some tests (such as empty URL, update_mode=none) are required in the
> helper to make the decision for cloning. These checks have been
> moved into the C function as well (no need to repeat them in the
> shell script).
>
> Signed-off-by: Stefan Beller <sbeller@google.com>
> ---
>  builtin/submodule--helper.c | 236 ++++++++++++++++++++++++++++++++++++++++++++
>  git-submodule.sh            |  45 +++------
>  2 files changed, 247 insertions(+), 34 deletions(-)
>
> diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
> index f4c3eff..e865fca 100644
> --- a/builtin/submodule--helper.c
> +++ b/builtin/submodule--helper.c
> @@ -255,6 +255,241 @@ static int module_clone(int argc, const char **argv, const char *prefix)
>         return 0;
>  }
>
> +static int git_submodule_config(const char *var, const char *value, void *cb)
> +{
> +       return submodule_config(var, value, cb);
> +}