#!/bin/sh
#
#    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.
#

realpath() {
  READLINK_EXISTS=$(command -v readlink &> /dev/null)
  if [ -z $READLINK_EXISTS ]; then
    OURPWD=${PWD}
    cd "$(dirname "${1}")" || exit 2
    LINK=$(ls -l "$(basename "${1}")" | awk -F"-> " '{print $2}')
    while [ "${LINK}" ]; do
        echo "link: ${LINK}" >&2
        cd "$(dirname "${LINK}")" || exit 2
        LINK=$(ls -l "$(basename "${1}")" | awk -F"-> " '{print $2}')
    done
    REALPATH="${PWD}/$(basename "${1}")"
    cd "${OURPWD}" || exit 2
    echo "${REALPATH}"
  else
    OURPWD=${PWD}
    cd "$(dirname "${1}")" || exit 2
    LINK=$(readlink "$(basename "${1}")")
    while [ "${LINK}" ]; do
	    echo "link: ${LINK}" >&2
        cd "$(dirname "${LINK}")" || exit 2
        LINK=$(readlink "$(basename "${1}")")
    done
    REALPATH="${PWD}/$(basename "${1}")"
    cd "${OURPWD}" || exit 2
    echo "${REALPATH}"
  fi
}

REALNAME=$(realpath "$0")
DIRNAME=$(dirname "${REALNAME}")
PROGNAME=$(basename "${REALNAME}")

#
# Load common functions
#
. "${DIRNAME}/inc"

#
# Sourcing environment settings for karaf similar to tomcats setenv
#
KARAF_SCRIPT="${PROGNAME}"
export KARAF_SCRIPT
if [ -f "${DIRNAME}/setenv" ]; then
  . "${DIRNAME}/setenv"
fi

setupClassPath() {
    # Setup classpath
    CLASSPATH="${KARAF_HOME}/system/org/apache/karaf/instance/org.apache.karaf.instance.core/4.1.2/org.apache.karaf.instance.core-4.1.2.jar"
    CLASSPATH="${CLASSPATH}:${KARAF_HOME}/system/org/apache/karaf/shell/org.apache.karaf.shell.core/4.1.2/org.apache.karaf.shell.core-4.1.2.jar"
    CLASSPATH="${CLASSPATH}:${KARAF_HOME}/system/org/ops4j/pax/logging/pax-logging-api/1.10.1/pax-logging-api-1.10.1.jar"
    CLASSPATH="${CLASSPATH}:${KARAF_HOME}/system/org/jline/jline/3.4.0/jline-3.4.0.jar"
}

init() {
    # Determine if there is special OS handling we must perform
    detectOS

    # Unlimit the number of file descriptors if possible
    unlimitFD

    # Locate the Karaf home directory
    locateHome

    # Locate the Karaf base directory
    locateBase

    # Locate the Karaf data directory
    locateData

    # Locate the Karaf etc directory
    locateEtc

    # Setup the native library path
    setupNativePath

    # Locate the Java VM to execute
    locateJava

    # Determine the JVM vendor
    detectJVM

    # Setup default options
    setupDefaults

    # Setup classpath
    setupClassPath

    # Install debug options
    setupDebugOptions

}

run() {
    convertPaths
    exec "${JAVA}" ${JAVA_OPTS} \
        -Dkaraf.instances="${KARAF_HOME}/instances" \
        -Dkaraf.home="${KARAF_HOME}" \
        -Dkaraf.base="${KARAF_BASE}" \
        -Dkaraf.etc="${KARAF_ETC}" \
        -Djava.io.tmpdir="${KARAF_DATA}/tmp" \
        -Djava.util.logging.config.file="${KARAF_BASE}/etc/java.util.logging.properties" \
        ${KARAF_OPTS} ${OPTS} \
        -classpath "${CLASSPATH}" \
        org.apache.karaf.instance.main.Execute "$@"
}

main() {
    init
    run "$@"
}

main "$@"

