David S. thedava

Deterministic save load in Factorio

One of the key parts of the save/load process in Factorio is that it must be deterministic. This means that for a given save file (when no external factors change) saving, exiting, and loading the save shouldn't change any observable behavior.

There are a few reasons and benefits for this strict requirement:

Without it: You couldn't join a running multiplayer game (and by proxy save, exit, and resume one)
Without it: the replay system wouldn't work if you ever saved, exited, and resumed playing.
With it: we can easily test that saving and loading produces no observable change letting us know we implemented save/load correctly.
With it: you won't see things change randomly as a result of "reloading" like you do in so many other games.

[LINUX] Factorio Headless Server Guide

So, with credit to the Factorio wiki and cbednarski's helpful gist, I managed to eventually setup a Factorio headless server. Although, I thought the process could be nailed down/simplified to be a bit more 'tutorialised' and also to document how I got it all working for my future records.

The specific distro/version I'm using for this guide being Ubuntu Server 16.04.1 LTS. Although, that shouldn't matter, as long as your distro supports systemd (just for this guide, not a Factorio headless requirement, although most distros use it as standard now). The version of Factorio I shall be using is 0.14.20, although should work for any version of Factorio 0.14.12 and higher.

Just a note to newcomers: If there are any issues with the installation steps, people in the comments are doing a good job

	#cloud-config

	# Option 1 - Full installation using cURL
	package_update: true
	package_upgrade: true

	groups:
	- docker

	system_info:

	<?php
	// Simply place the following two functions in _support/Helper/Acceptance.php
	// Then you can call $I->verifyRedirect(...) inside your tests

	namespace Helper;
	class Acceptance extends \Codeception\Module
	{

	/**
	* Ensure that a particular URL does NOT contain a 301/302

	<?php
	namespace Application\Service;

	use Zend\Cache\Storage\Adapter\MemcachedOptions;
	use Zend\Cache\Storage\Adapter\MemcachedResourceManager;
	use Zend\Cache\StorageFactory;
	use Zend\ServiceManager\FactoryInterface;
	use Zend\ServiceManager\ServiceLocatorInterface;
	use Zend\Session\SaveHandler\Cache;

	<?php

	/*
	* (c) Mark Badolato <[email protected]>
	*
	* This content is released under the {@link http://www.opensource.org/licenses/MIT MIT License.}
	*/

	namespace Bado;