try fetchDay(allocator, opts, session, day);

        const file_name = try std.fmt.allocPrint(allocator, "{s}/day{d:0>2}.txt", .{ INPUTS_DIR, day });
        defer allocator.free(file_name);
        const fd = cwd.openFile(file_name, std.fs.File.OpenFlags{}) catch |err| {
            switch (err) {
                error.FileNotFound => {
                    try fetchDay(allocator, opts, session, day);
                    continue;
                },
                else => return err,
            }
        };
        defer fd.close();