gremlin-console/src/main/bin/gremlin.sh

#!/bin/bash
#
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
#

set -e
set -u

USER_DIR=$(pwd)

cd "$(dirname "$0")"
DIR=$(pwd)

SCRIPT_NAME="$(basename "$0")"
while [ -h "${SCRIPT_NAME}" ]; do
  SOURCE="$(readlink "${SCRIPT_NAME}")"
  DIR="$( cd -P "$( dirname "${SOURCE}" )" && pwd )"
  cd "${DIR}"
done

cd ..
SYSTEM_EXT_DIR="$(pwd)/ext"

JAVA_OPTIONS=${JAVA_OPTIONS:-}

if [ ! -z "${JAVA_OPTIONS}" ]; then
  USER_EXT_DIR=$(grep -o '\-Dtinkerpop.ext=\(\([^"][^ ]*\)\|\("[^"]*"\)\)' <<< "${JAVA_OPTIONS}" | cut -f2 -d '=' | xargs -0 echo)
  if [ ! -z "${USER_EXT_DIR}" -a ! -d "${USER_EXT_DIR}" ]; then
    mkdir -p "${USER_EXT_DIR}"
    cp -R "${SYSTEM_EXT_DIR}/*" "${USER_EXT_DIR}/"
  fi
fi

case $(uname) in
  CYGWIN*)
    CP="${CP:-}";$( echo lib/*.jar . | sed 's/ /;/g')
    ;;
  *)
    CP="${CP:-}":$( echo lib/*.jar . | sed 's/ /:/g')
esac

CP=$CP:$( find -L "${SYSTEM_EXT_DIR}" "${USER_EXT_DIR:-${SYSTEM_EXT_DIR}}" -mindepth 1 -maxdepth 1 -type d | \
          sort -u | sed 's/$/\/plugin\/*/' | tr '\n' ':' )

export CLASSPATH="${CLASSPATH:-}:$CP"

# Find Java
if [ -z "${JAVA_HOME:-}" ]; then
    JAVA="java -server"
else
    JAVA="$JAVA_HOME/bin/java -server"
fi

# Set default message threshold for logging in Gremlin's console appender
if [ -z "${GREMLIN_LOG_LEVEL:-}" ]; then
    GREMLIN_LOG_LEVEL=WARN
fi

# Script debugging is disabled by default, but can be enabled with -l
# TRACE or -l DEBUG or enabled by exporting
# SCRIPT_DEBUG=nonemptystring to gremlin.sh's environment
if [ -z "${SCRIPT_DEBUG:-}" ]; then
    SCRIPT_DEBUG=
fi

# Process options
while getopts ":l" opt; do
    case "$opt" in
    l) eval GREMLIN_LOG_LEVEL=\$$OPTIND
       OPTIND="$(( $OPTIND + 1 ))"
       if [ "$GREMLIN_LOG_LEVEL" = "TRACE" -o \
            "$GREMLIN_LOG_LEVEL" = "DEBUG" ]; then
	   SCRIPT_DEBUG=y
       fi
       ;;
    esac
done

JVM_OPTS=()
if [ ! -z "${JAVA_OPTIONS}" ]; then
    JVM_OPTS+=( "${JAVA_OPTIONS}" )
fi

JVM_OPTS+=( "-Duser.working_dir=${USER_DIR}" "-Dtinkerpop.ext=${USER_EXT_DIR:-${SYSTEM_EXT_DIR}}" "-Dlogback.configurationFile=conf/logback.xml" "-Dgremlin.logback.level=$GREMLIN_LOG_LEVEL" )
JVM_OPTS=$(awk -v RS=' ' '!/^$/ {if (!x[$0]++) print}' <<< "${JVM_OPTS}" | grep -v '^$' | paste -sd ' ' -)

if [ -n "$SCRIPT_DEBUG" ]; then
    # in debug mode enable debugging of :install command
    JVM_OPTS+=( "-Divy.message.logger.level=4" "-Dgroovy.grape.report.downloads=true" )
    echo "CLASSPATH: $CLASSPATH"
    echo "JVM_OPTS: $JVM_OPTS"
    set -x
fi

# Detect JDK version and add specific flags for JDK 17
JAVA_VERSION=$($JAVA -version 2>&1 | awk -F '"' '/version/ {print $2}')
if [[ "$JAVA_VERSION" == 17* ]]; then
    JVM_OPTS+=( "--add-opens=java.base/sun.nio.ch=ALL-UNNAMED" )
    JVM_OPTS+=( "--add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED" )
fi

# Start the JVM, execute the application, and return its exit code
# shellcheck disable=SC2068
exec $JAVA "${JVM_OPTS[@]}" org.apache.tinkerpop.gremlin.console.Console "$@"