Re: [PATCH] push: do not add submodule odb as an alternate when recursing on demand

[Junio C Hamano <gitster@pobox.com>]

Stefan Beller <sbeller@google.com> writes:

> "git push --recurse-submodules=on-demand" adds each submodule as an
> alternate with add_submodule_odb before checking whether the
> submodule has anything to push and pushing it if so.
>
> However, it never accesses any objects from the submodule.
> ...
> Use is_submodule_populated_gently instead, which is simpler and
> cheaper.
>
> Signed-off-by: Stefan Beller <sbeller@google.com>
> ---
>
>  Originally I intended to send this out as part of a larger series,
>  but the series is getting too large series, sending all things in smaller
>  units!

This vaguely reminds me that you sent something imilar perhaps for a
different codepath.

Is "is it populated" a good thing to check here, though?  IIRC,
add-submodule-odb allows you to add the object database of an
inactivated submodule, so this seems to change the behaviour.  I do
not know if the behaviour change is a good thing (i.e. bugfix) or
not (i.e. regression) offhand, though.

Thanks.

> diff --git a/submodule.c b/submodule.c
> index 111a3007fc..e20216bc0f 100644
> --- a/submodule.c
> +++ b/submodule.c
> @@ -966,7 +966,9 @@ static int push_submodule(const char *path,
>  			  const struct string_list *push_options,
>  			  int dry_run)
>  {
> -	if (add_submodule_odb(path))
> +	int code;
> +
> +	if (!is_submodule_populated_gently(path, &code))
>  		return 1;
>  
>  	if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {