From the P2 repository

All versions of the plug-in are also deployed on the following P2 repository:

To use it:

  1. Open Eclipse IDE
  2. Click on Help > Install new software...
  3. Paste the P2’s URL in the Work with field

Under the Discord Rich Presence Integration category, check the following features:

  • Discord Rich Presence
  • Discord Rich Presence UI

Note

The latter is not required for the plug-in to work but adds dedicated preferences pages to the IDE Preferences and Project Settings dialogs.

Click on Next >, accept the licenses then Finish.

Wait for the installation to end then restart the IDE.