solr/docker/scripts/docker-entrypoint.sh

#!/bin/bash
#
# docker-entrypoint for Solr docker

set -e

# Clear some variables that we don't want runtime
unset SOLR_USER SOLR_UID SOLR_GROUP SOLR_GID \
      SOLR_CLOSER_URL SOLR_DIST_URL SOLR_ARCHIVE_URL SOLR_DOWNLOAD_URL SOLR_DOWNLOAD_SERVER SOLR_KEYS SOLR_SHA512

if [[ "$VERBOSE" == "yes" ]]; then
    set -x
fi

if ! [[ ${SOLR_PORT:-} =~ ^[0-9]+$ ]]; then
  SOLR_PORT=8983
  export SOLR_PORT
fi

# Essential for running Solr
init-var-solr

# when invoked with e.g.: docker run solr -help
if [ "${1:0:1}" == '-' ]; then
    set -- solr-foreground "$@"
fi

# execute command passed in as arguments.
# The Dockerfile has specified the PATH to include
# /opt/solr/bin (for Solr) and /opt/solr/docker (for docker-specific scripts
# like solr-foreground, solr-create, solr-precreate, solr-demo).
# Note: if you specify "solr", you'll typically want to add -f to run it in
# the foreground.
exec "$@"