Jumploader
Jumploader is a mod that allows the use of Fabric mods in Twitch modpacks, by loading Fabric as if it were a Forge mod. It works on both the client and server, however it's only necessary on the server if you want to launch the game using tools that only support Forge. Jumploader is fully configurable to load any Minecraft version and mod loader, but by default it will load the Fabric loader and library versions corresponding to your current version of the game. It only loads if your game was launched from Forge/ModLauncher, so it won't do anything if your Minecraft launcher already supports Fabric.
Warning: This mod will stop Forge mods from loading! Make sure you back up before you join worlds where you have used Forge mods previously - as all the blocks/items added by those mods will disappear.
What it does
- Loads Fabric (or a different configured mod loader) instead of Forge, from a Forge installation.
- Automatically loads the latest Fabric loader version for your version of the game, with no required configuration.
- If necessary, loads the unpatched Minecraft game, so that Fabric can be used with it.
- Ensures that Fabric and Mixin don't see the classes loaded by ModLauncher.
What it doesn't do
- Jumploader doesn't let you run Fabric mods in tandem with Forge mods - it hijacks the launching process so that Forge never loads. See Patchwork for a project aiming to do this.
- Jumploader doesn't currently work very well on the client for loading a Minecraft game with a different major version (including snapshots) to the currently loaded game, as supplementary assets (such as sounds) are downloaded separately by the game launcher. The Asset Validator mod fixes this issue.
Requirements
Requires a Forge version that uses ModLauncher (or ModLauncher on it's own, without Forge) - this usually means 1.13 or newer.
Support
I'm comp500#7396 on The Fabric Project Discord server. I'm also /u/comp500 on reddit and comp500 on Keybase. DM me or @ me at any time if you have any questions!
but could you make it so forge can load fabric mods in the forge loader? now that would be cool
In reply to FullMetalMaster1:
Fabric mods in tandem with Forge mods would be amazing
In reply to FullMetalMaster1:
Not with this mod.. and there are several issues with loading Fabric mods on Forge. The Patchwork project is aiming to allow Forge mods to run on Fabric, see their Github org (with Discord server linked) at https://github.com/PatchworkMC
In reply to comp500:
Fabric running on forge would prob be better in my honest opinion but eh ig.
Is there 1.16.2 support as it skipped from 1.16.1 to 1.16.3
In reply to xtinfinity:
...yes?
Minecraft 1.16.3 please?
Edit: Oh hello comp
In reply to TheYTG123:
I'm surprised curse added the label so quickly... anyway, Jumploader should work on all Minecraft versions that Forge and Fabric both support, no need to update Jumploader.
In reply to comp500:
Was just wondering; Is it possible to launch a version of Minecraft that is different from the one running using Jumploader?
Of course, no one would need this, but it seems interesting
Edit: I just saw that I asked it earlier lol
Nice mod ! Can I make an introduction to https://www.mcbbs.net/ ？I hope more Chinese player will use it! I will write your username and your curseforge website in the introduction!
In reply to marinamarissa:
Sure, as long as you also provide the license.
Does this makes Forge and Fabric mods compatible with each other too?
In reply to cursedlizard08:
Jumploader doesn't let you run Fabric mods in tandem with Forge mods - it hijacks the launching process so that Forge never loads. See Patchwork for a project aiming to do this.
It is theoretically possible to load Fabric loader under Forge while also allowing Forge mods to run, but Fabric loader currently doesn't support it and no mods made for Fabric will support it unless they are specifically designed to do so (which is very unlikely to be the case due to licensing issues with MCP).
What is the easiest way to work with the source code of a jumploader fork in Eclipse? I plan to integrate the PatchworkMC Patcher into Jumploader. Thus, all Forge Mods would be patched before Jumploader starts the Fabric Loader. I programmed mods 2 years ago. My Java and Eclipse knowledge have therefore been somewhat forgotten. I was able to set the dev-environment up, but I get this error message: "Failed to download jar: Authentication token is invalid, please go online to download the Minecraft JAR!"
In reply to msandro:
In a development environment, there's a specific line you have to uncomment for it to work the first time, but after that it should work the same as normal. I suggest helping with the Fabric loader provided mods PR instead though, it's being discussed in the FabLabs discord linked from https://github.com/FabLabsMC. Having this functionality built into Fabric loader should be a much more robust solution, and I wouldn't really want to maintain Patchwork patching as part of Jumploader (although the license permits you to do whatever you want).
In reply to comp500:
Thanks for the information. Yes you are right, the patcher actually has no place in Jumploader, but I was looking for a solution to use PatchworkMC in a modpack. Due to the restrictions of Twitch, it is currently not easy to install my modpack: https://www.curseforge.com/minecraft/modpacks/patchworkmc-testpack Therefore, I made it my task to create something on the basis of Jumploader. However, I fail when merging the dependencies. Eclipse finds all libraries, the Jar can also be built. but a few dependencies seemed to be missing when running in MC. My goal was to do the following with Jumploader (if the corresponding config settings are set):
1. Patch Forge Mods
2. Download PatchworkAPI into the Mods folder
3. Jumploader starts fabric
In reply to msandro:
Hmm, if you release it as a separate project that's fine. If you can send me a crash report / log from the missing dependencies I'll see if I can figure out what's going wrong - if you can build the jar it's probably set up properly, although I've never tested it in Eclipse as I use IntelliJ.
In reply to comp500:
Thank you, I will try it again in the weekend. Yesterday I destroyed my build.gradle while trying to merge the file from Patcher with the file from Jumploader again.
Can it load Fabric 1.16.1 on Forge 1.15.2? Twitch doesn't support creating 1.16.1 modpacks yet.
In reply to TheYTG123:
Twitch currently doesn't support 1.16 modpacks with either Forge or Fabric, but with Asset Validator in the mods folder and this file as your jumploader.json config, you can launch 1.16.1 from a 1.15.2 Forge instance. It's not supported natively in Jumploader as you need to override the dependencies that Mojang added in 1.16, but with those two it should work. See All of Fabric 3 for a modpack that uses it.
Edit: This isn't necessary anymore, Twitch supports 1.16 and 1.16.1 properly.