Groovy Monkey plugin on Eclipse 4.x

Last version of the Groovy Monkey plugin (http://sourceforge.net/projects/groovy-monkey/) was released for Eclipse 3.2 a good while ago, but it installed fine on pretty much everything up to Eclipse 3.8. It stopped installing though on Eclipse 4.2 and I created this ticket. Thankfully a SourceForce user (fmjrey) found a solution about a month after!

If you would try to install from the update site, it will report a missing dependency that was removed in Eclipse 4.2 (4. Update Manager bundles removed).

Cannot complete the install because one or more required items could not be found.
  Software being installed: Groovy Monkey 0.6.1 (net.sf.groovyMonkey.feature.group 0.6.1)
  Missing requirement: Groovy Monkey 0.6.1 (net.sf.groovyMonkey 0.6.1) requires 'bundle org.eclipse.update.core 0.0.0' but it could not be found
  Cannot satisfy dependency:
    From: Groovy Monkey 0.6.1 (net.sf.groovyMonkey.feature.group 0.6.1)
    To: net.sf.groovyMonkey [0.6.1]

The solution is to temporarily add the Eclipse 3.8 update site so you can install the plugin, then you can remove it after (http://download.eclipse.org/eclipse/updates/3.8).

Try again to install the plugin, but make sure you check the box that says “Contact all update sites during install to find required software”.

That should find and download the missing dependencies and install successfully now.

When finished, after the restart, you can go back in Preferences > Install / Update > Available Software Sites and remove the Eclipse 3.8 update site (above).