Cleanup data directories for cores no longer served up by Solr

solr-cleanup.sh

#!/bin/bash
#

SOLR_HOME="/srv/tomcat/rpsolr/solr"

for INDEX_DIR in `/bin/find ${SOLR_HOME} -type d -name index -exec dirname {} \;`; do
  CORE=`/bin/basename ${INDEX_DIR}`
  /bin/grep "<core name=\"${CORE}\"" ${SOLR_HOME}/solr.xml > /dev/null
  if [ $? != 0 ]; then
    echo "Removing datadir for non-existent core ${CORE}"
    /bin/rm -rf ${SOLR_HOME}/${CORE}
  fi
done