SEE: https://issues.apache.org/jira/browse/LUCENE-2562 ,  https://groups.google.com/forum/#!topic/luke-discuss/S_Whwg2jwmA + https://github.com/DmitryKey/luke/ , I will slowly drop this repo, above should be used and ev. moved to lucene to contrib (was:  fork of http://luke.googlecode.com/svn/ to support lucene 4.X  (binary builds are on https://java.net/projects/opengrok/downloads) )