Function sync_submodule

builtin/submodule--helper.c:1429–1520

#define SYNC_CB_INIT { 0 }

static void sync_submodule(const char *path, const char *prefix,
			   const char *super_prefix, unsigned int flags)
{
	const struct submodule *sub;
	char *remote_key = NULL;
	char *sub_origin_url, *super_config_url, *displaypath, *default_remote;
	struct strbuf sb = STRBUF_INIT;
	char *sub_config_path = NULL;
	int code;

	if (!is_submodule_active(the_repository, path))
		return;

	if (validate_submodule_path(path) < 0)
		die(NULL);

	sub = submodule_from_path(the_repository, null_oid(the_hash_algo), path);

	if (sub && sub->url) {
		if (starts_with_dot_dot_slash(sub->url) ||
		    starts_with_dot_slash(sub->url)) {
			char *up_path = get_up_path(path);

			sub_origin_url = resolve_relative_url(sub->url, up_path, 1);
			super_config_url = resolve_relative_url(sub->url, NULL, 1);
			free(up_path);
		} else {
			sub_origin_url = xstrdup(sub->url);
			super_config_url = xstrdup(sub->url);
		}
	} else {
		sub_origin_url = xstrdup("");
		super_config_url = xstrdup("");
	}

	displaypath = get_submodule_displaypath(path, prefix, super_prefix);

	if (!(flags & OPT_QUIET))
		printf(_("Synchronizing submodule url for '%s'\n"),
			 displaypath);

	strbuf_reset(&sb);
	strbuf_addf(&sb, "submodule.%s.url", sub->name);
	if (repo_config_set_gently(the_repository, sb.buf, super_config_url))
		die(_("failed to register url for submodule path '%s'"),
		      displaypath);

	if (!is_submodule_populated_gently(path, NULL))
		goto cleanup;

	strbuf_reset(&sb);
	code = get_default_remote_submodule(path, &default_remote);
	if (code)
		exit(code);

	remote_key = xstrfmt("remote.%s.url", default_remote);
	free(default_remote);