Erstelle in deiner IDEA ein neues Projekt(Maven) lade dir den Sourcecode herunter und füge den ersten Ordner ein und nimm die Maven die du in der pom.xml einfügen musst:

<repositories>
<!-- This adds the Spigot Maven repository to the build -->
<repository>
<id>spigot-repo</id>
<url> https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
</repository>
</repositories>

<dependencies>
<!--This adds the Spigot API artifact to the build -->
<dependency>
<groupId>org.spigotmc</groupId>
<artifactId>spigot-api</artifactId>
<version>1.20.2-R0.1-SNAPSHOT</version>
<scope>provided</scope>
</dependency>
</dependencies>

Und zack hast du den Sourcecode in deiner IDEA


Create a new project (Maven) in your IDE, download the source code, and add the first folder. Then include the Maven configuration that you need to add in the pom.xml file

<repositories>
<!-- This adds the Spigot Maven repository to the build -->
<repository>
<id>spigot-repo</id>
<url> https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
</repository>
</repositories>

<dependencies>
<!--This adds the Spigot API artifact to the build -->
<dependency>
<groupId>org.spigotmc</groupId>
<artifactId>spigot-api</artifactId>
<version>1.20.2-R0.1-SNAPSHOT</version>
<scope>provided</scope>
</dependency>
</dependencies>

:And there you go, you have the source code in your IDE.