From Eclipsepedia

Preparing new versions

1. Update the sources from CVS:
   1. Update all the existing plugins.
   2. Re-Check out all the plugins (Import -> CVS -> Existing Module), when proposed to confirm overwrite choose No to All (Exceptions).
   3. Open org.eclipse.php_feature/feature.xml.
   4. Make sure all the needed plugins are listed.
2. Create the new tag in CVS.
   1. Commit the changes into CVS (Team -> Commit).
   2. Create the tag on relevant plugins as follows (requires org.eclipse.releng.tools):
      • Do Team -> Release....
      • Choose "Specify the map project you want to use" and select the org.eclipse.php-releng project.
      • Check all the relevant plugins/features. Make sure that "Release only projects that have changed since the last release" is NOT checked.
      • Insert tag name (vYYYYMMDD).