Getting code=10053 error while installing groovy-eclipse on Eclipse IDE (Oxygen) for Eclipse Committers

[ybayk]

After following the steps in https://github.com/groovy/groovy-eclipse/blob/master/docs/Getting-Started-with-Groovy-Eclipse-Source-Code.md getting an error:

ERROR: org.eclipse.equinox.p2.director code=10053 Cannot complete the install because one or more required items could not be found.
  ERROR: org.eclipse.equinox.p2.director code=0 Software being installed: artificial_root 1.0.0.v1527811536694
  ERROR: org.eclipse.equinox.p2.director code=0 Missing requirement: artificial_root 1.0.0.v1527811536694 requires 'org.codehaus.groovy.alltests.feature.feature.group 0.0.0' but it could not be found

Issue is reproducible on both mac and pc. Used anonymous github url for the groovy-eclipse source (https://github.com/groovy/groovy-eclipse.git)

[eric-milles]

I'm most the way through editing the setup file. Just trying to button up a few more items before committing.

[eric-milles]

The setup should execute to completion now. All imported projects should build with no errors and you should be able to launch Eclipse Application or JUnit Plug-in Tests from Run As or Debug As.

I could not figure out how to exclude org.mockito plug-in from the Target Platform, so there will be a framework error that will trip up ErrorLogTest unless you edit the target platform definition first.