After following the steps in https://github.com/groovy/groovy-eclipse/blob/master/docs/Getting-Started-with-Groovy-Eclipse-Source-Code.md (on macOS High Sierra) 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
I am not sure why org.codehaus.groovy.alltests is not found and whether the version 0.0.0 is legit here. I tried to make a clean installation too (deleted ~/.gradle, ~/.p2 dirs) - did not help.