Is there a way to upgrade eclipse and keep all the installed plugins?

This is the best option I've found so far. Dropins directories work, but they're a pain to maintain, because Eclipse wants to install new plug-ins in the Eclipse directory.

I. To transfer your list of update sites:

  1. Run your old Eclipse one last time
  2. Go to Window->Preferences->Install/Update->Available Software Sites
  3. Select all update sites (click on one, then Ctrl-A), click Export, save the file somewhere
  4. Run your new Eclipse, select your workspace
  5. Go to Window->Preferences->Install/Update->Available Software Sites
  6. Click Import, choose the file from step 3

II. To copy across your old plug-ins:

  1. In the new Eclipse, select File->Import->Install->From Existing Installation
  2. Select your old eclipse directory, eg ~/apps/eclipse-jee-indigo-SR1-linux-gtk-x86_64/eclipse/
  3. Select the plug-ins/features you want to install, click Finish
  4. When it finishes, you can archive/delete your old Eclipse directory

In the latest Eclipse, you can keep all previously-installed plugins by running Eclipse, selecting File → Import…, continuing with Install → From Existing Installation, and then selecting the older Eclipse’s path.