Function compute_default_attr_source

attr.c:1201–1231

}

static int compute_default_attr_source(struct object_id *attr_source)
{
	int ignore_bad_attr_tree = 0;

	if (!default_attr_source_tree_object_name)
		default_attr_source_tree_object_name = getenv(GIT_ATTR_SOURCE_ENVIRONMENT);

	if (!default_attr_source_tree_object_name && git_attr_tree) {
		default_attr_source_tree_object_name = git_attr_tree;
		ignore_bad_attr_tree = 1;
	}

	if (!default_attr_source_tree_object_name)
		return 0;

	if (!startup_info->have_repository) {
		if (!ignore_bad_attr_tree)
			die(_("cannot use --attr-source or GIT_ATTR_SOURCE without repo"));
		return 0;
	}

	if (repo_get_oid_treeish(the_repository,
				 default_attr_source_tree_object_name,
				 attr_source)) {
		if (!ignore_bad_attr_tree)
			die(_("bad --attr-source or GIT_ATTR_SOURCE"));
		return 0;
	}

	return 1;
}

static struct object_id *default_attr_source(void)
{