This guide assumes you have git installed, if not, use this guide.
First and foremost, you will need to clone the repo using the .git in the Clone or Download button. The command you will run is likely:
git clone https://github.com/Time6628/CatClearLag.git
Make sure you are using the JDK
Go to the locally cloned repo, open your terminal or cmd and run gradlew build
For most terminals other than Windows cmd, you will need to prefix it with ./
If you receive an error about missing a tools.jar, you are not using the JDK.
If everything was successful you should find the built jar file in build/libs/