FML (Factorio Mod Loader) is a tui application to download and manage factorio mods on headless servers.
Mod management on headless factorio servers is rather painful because you always have to configure the mods you want to have installed in factorio and then either copy all of the mods to the server or at least copy the mod-list.json file and then use a script to download all mods specified in there.
FML aims to help here by being a tui application that can be installed on a headless server and can then be used to configure mods without having to copy files between machines.
You can find compiled binaries for every platform in the release section.
Download the archive for your corresponding platform, unzip it and add the included binary to your PATH.
Up-> Scroll upDown-> Scroll downTab-> Change tabsCtrl + C-> Quit FML
Enter-> Enabled/Disable modd-> Delete mod
/or start typing -> Switch to search barEscorDown-> Switch from search bar to mod listRight-> Switch from mod list to mod detailsLeft-> Switch from mod details to mod listEnter-> Download mod
If something goes wrong, FML will crash. It won't exit gracefully or handle most errors.
The current dependency management is very basic. When downloading a mod with required dependencies FML will download the latest release of all required mod dependencies, but thats about it. FML will not consider the factorio version or any constraints on the version of a dependency mod.
FML is currently modelled similar to how the mod portal in factorio works. This means the source of truth for installed mods are all mods that are installed in the mods directory. The source of truth is not the mod-list.json file in the mods directory. This file is only generated when exiting FML so the server knows which mods are enabled and which are not. Therefore, it currently isn't possible to add a mod-list.json file in the mods directory and ask FML to download all mods from it.