#!/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() {
  # Use in priority xpg4 awk or nawk on SunOS as standard awk is outdated
  AWK=awk
  if ${solaris}; then
      if [ -x /usr/xpg4/bin/awk ]; then
          AWK=/usr/xpg4/bin/awk
      elif [ -x /usr/bin/nawk ]; then
          AWK=/usr/bin/nawk
      fi
  fi

  READLINK_EXISTS=`command -v readlink &> /dev/null`
  BINARY_NAME=`basename "${1}"`
  if [ -z "$READLINK_EXISTS" ]; then
    OURPWD="`pwd`"
    cd "`dirname "${1}"`" || exit 2
    LINK=`ls -l "${BINARY_NAME}" | ${AWK} -F"-> " '{print $2}'`
    while [ "${LINK}" ]; do
        echo "link: ${LINK}" >&2
        cd "`dirname "${LINK}"`" || exit 2
        LINK=`ls -l "${BINARY_NAME}" | ${AWK} -F"-> " '{print $2}'`
    done
    REALPATH="`pwd`/${BINARY_NAME}"
    cd "${OURPWD}" || exit 2
    echo "${REALPATH}"
  else
    OURPWD="`pwd`"
    cd "`dirname "${1}"`" || exit 2
    LINK=`readlink "${BINARY_NAME}"`
    while [ "${LINK}" ]; do
        echo "link: ${LINK}" >&2
        cd "`dirname "${LINK}"`" || exit 2
        LINK=`readlink "${BINARY_NAME}"`
    done
    REALPATH="`pwd`/${BINARY_NAME}"
    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="${KARAF_HOME}/system/org/apache/karaf/instance/org.apache.karaf.instance.core/@@project.version@@/org.apache.karaf.instance.core-@@project.version@@.jar"
    CLASSPATH="${CLASSPATH}:${KARAF_HOME}/system/org/apache/karaf/shell/org.apache.karaf.shell.core/@@project.version@@/org.apache.karaf.shell.core-@@project.version@@.jar"
    CLASSPATH="${CLASSPATH}:${KARAF_HOME}/system/org/ops4j/pax/logging/pax-logging-api/@@pax.logging.version@@/pax-logging-api-@@pax.logging.version@@.jar"
    CLASSPATH="${CLASSPATH}:${KARAF_HOME}/system/org/jline/jline/@@jline.version@@/jline-@@jline.version@@.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

    # Locate the Karaf log directory
    locateLog

    # 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="${KARAF_ETC}" \
        -Dkaraf.log="${KARAF_LOG}" \
        -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 "$@"