Function reset_tree

builtin/stash.c:334–373

}

static int reset_tree(struct object_id *i_tree, int update, int reset)
{
	int nr_trees = 1;
	struct unpack_trees_options opts;
	struct tree_desc t[MAX_UNPACK_TREES];
	struct tree *tree;
	struct lock_file lock_file = LOCK_INIT;

	repo_read_index_preload(the_repository, NULL, 0);
	if (refresh_index(the_repository->index, REFRESH_QUIET, NULL, NULL, NULL))
		return -1;

	repo_hold_locked_index(the_repository, &lock_file, LOCK_DIE_ON_ERROR);

	memset(&opts, 0, sizeof(opts));

	tree = repo_parse_tree_indirect(the_repository, i_tree);
	if (repo_parse_tree(the_repository, tree))
		return -1;

	init_tree_desc(t, &tree->object.oid, tree->buffer, tree->size);

	opts.head_idx = 1;
	opts.src_index = the_repository->index;
	opts.dst_index = the_repository->index;
	opts.merge = 1;
	opts.reset = reset ? UNPACK_RESET_PROTECT_UNTRACKED : 0;
	opts.update = update;
	if (update)
		opts.preserve_ignored = 0; /* FIXME: !overwrite_ignore */
	opts.fn = oneway_merge;

	if (unpack_trees(nr_trees, t, &opts))
		return -1;

	if (write_locked_index(the_repository->index, &lock_file, COMMIT_LOCK))
		return error(_("unable to write new index file"));

	return 0;
}

static int create_index_from_tree(const struct object_id *tree_id,
				  const char *index_path)