I accidently removed all of the libraries, so now every single class is shown as missing and my imports are not valid.

How can I add all of the libraries back and where can I find them?

You need to recreate your IDE project.

 

If you're using Eclipse, re-run

gradlew eclipse

.

 

If you're using IDEA, open build.gradle with it and re-import the project.

Okay, I've done that, but now look at this:

 

This happened the first time, and every time I compile it adds all of that shit with it...

 

Not too sure what's going on there since I don't use Eclipse myself.

 

Try running

gradlew cleanEclipse eclipse

to delete the project and then regenerate it.

Didn't change anything.

The simple solution would be to start again. Just make sure to backup the src/main folder so your mods source is saved (Just copy it back once everything is setup again).

 

One issue you can have with eclipse is that the commands for gradle don't always clean everything, so you can have a situation where eclipse saves some IDE file which the gradle comands never reset (One example is if you try and copy/paste the whole lot to a different hard drive, eclipse will have saved the old location in some IDE file which is never reset with gradle).

solved.