Expose item/block remapping

[Belgabor]

It would be nice if you could do block/item remaps using MineTweaker. Now and then when doing modpacks you want to replace mods or provide an upgrade path for item/block changes a mod developer didn't implement. I'm not sure this is possible from Minetweaker, but what I mean is exposing the functionality @taelnia mentioned in this issue sinkillerj/ProjectE#313 in a generic way.

[stanhebben]

This an interesting suggestion and I will have a look at it after 3.0.10 is released.

[Yulife]

Please enlighten me @Belgabor, what exactly would this do? I am a bit confused :/

[stanhebben]

Such feature would allow remappings using scripts, allowing someone to say "if item X is unavailable (doesn't exist anymore), then use item Y". Thus ids that no longer exist due to mod changes can be remapped to other IDs and thus prevent/fix broken worlds due to mod updates.

I am not sure if it can be done, but there sure are people which would be grateful to have such feature handy for mod updates that break worlds, or for cases where mods have been removed from a modpack.

[taelnia]

Should be doable as long as the scripts are made outside of Minecraft. The remap event is triggered upon world load, so after all mods and minetweaker have run.