Subject: Re: [PATCH v3 08/13] submodule--helper run-update-procedure: learn --remote

From: Junio C Hamano <[email-masked]>
Date: Thu, 03 Mar 2022 13:35:40 -0800

Glen Choo <[email-masked]> writes:

> @@ -3033,6 +3004,25 @@ static int update_submodule2(struct update_data *update_data)
>  		die(_("Unable to find current revision in submodule path '%s'"),
>  			update_data->displaypath);
>  
> +	if (update_data->remote) {
> +		char *remote_name = get_default_remote_submodule(update_data->sm_path);
> +		const char *branch = remote_submodule_branch(update_data->sm_path);
> +		char *remote_ref = xstrfmt("refs/remotes/%s/%s", remote_name, branch);
> +
> +		if (!update_data->nofetch) {
> +			if (fetch_in_submodule(update_data->sm_path, update_data->depth,
> +					      0, NULL))
> +				die(_("Unable to fetch in submodule path '%s'"),
> +				    update_data->sm_path);
> +		}
> +
> +		if (resolve_gitlink_ref(update_data->sm_path, remote_ref, &update_data->oid))
> +			die(_("Unable to find %s revision in submodule path '%s'"),
> +			    remote_ref, update_data->sm_path);
> +
> +		free(remote_ref);
> +	}

This, and ...

> @@ -409,21 +395,6 @@ cmd_update()
>  			just_cloned=
>  		fi
>  
> -		if test -n "$remote"
> -		then
> -			branch=$(git submodule--helper remote-branch "$sm_path")
> -			if test -z "$nofetch"
> -			then
> -				# Fetch remote before determining tracking $sha1
> -				fetch_in_submodule "$sm_path" $depth ||
> -				die "fatal: $(eval_gettext "Unable to fetch in submodule path '\$sm_path'")"
> -			fi
> -			remote_name=$(sanitize_submodule_env; cd "$sm_path" && git submodule--helper print-default-remote)
> -			sha1=$(sanitize_submodule_env; cd "$sm_path" &&
> -				git rev-parse --verify "${remote_name}/${branch}") ||
> -			die "fatal: $(eval_gettext "Unable to find current \${remote_name}/\${branch} revision in submodule path '\$sm_path'")"
> -		fi

... this change would "fix" the temporary breakage [05/13] may have
brought us.  From the series structure's point of view, doing
[05/13] after this would be more sensible.  If we leave the call to
"displaypath" still in the script after this series, [05/13] or its
equivalent should mention that ensure-core-worktree does not matter
for that particular call when it delays the call to it by moving it
to the beginning of the update_submodule2() from the much earlier
part of the script.

>  		out=$(git submodule--helper run-update-procedure \
>  			  ${wt_prefix:+--prefix "$wt_prefix"} \
>  			  ${GIT_QUIET:+--quiet} \
> @@ -434,6 +405,7 @@ cmd_update()
>  			  ${update:+--update "$update"} \
>  			  ${prefix:+--recursive-prefix "$prefix"} \
>  			  ${sha1:+--oid "$sha1"} \
> +			  ${remote:+--remote} \
>  			  "--" \
>  			  "$sm_path")