#!/bin/bash

# Locate Java

if [ ! -z "${JAVA_HOME}" ]; then
    JAVA=${JAVA_HOME}/bin/java
else
    JAVA=`which java`
fi

if [ ! -f "${JAVA}" ]; then
    echo "Can't locate Java on your system" 1>&2
    echo "See http://goofans.com/gootool/troubleshooting/linux-java" 1>&2
    exit 1
fi

# Check they have Java 1.5 or 1.6

JAVA_VERSION=`${JAVA} -version 2>&1 | awk '{ print substr($3, 2, 4); exit }'`

if [ "${JAVA_VERSION}" != "1.5." -a "${JAVA_VERSION}" != "1.6." ]; then
    echo "GooTool requires Java 1.5 or 1.6. You have Java ${JAVA_VERSION}" 1>&2
    echo "See http://goofans.com/gootool/troubleshooting/linux-java" 1>&2
    exit 1
fi

function die()
{
    echo $1 1>&2
    exit 1
}

# Find the target of gootool symlink then locate gootool lib/etc directories

GOOTOOL_EXE=`readlink -f $0` || die "Can't canonicalise $0"
GOOTOOL_EXE_DIR=`dirname ${GOOTOOL_EXE}` || die "Can't dirname $GOOTOOL_EXE"

if [ "${GOOTOOL_EXE_DIR}" = "/usr/bin" ]; then
    GOOTOOL_LIB_DIR="/usr/share/gootool"
    GOOTOOL_ETC_DIR="/etc/gootool"
else
    GOOTOOL_LIB_DIR=`readlink -f ${GOOTOOL_EXE_DIR}/../lib` || die "Can't canonicalise ${GOOTOOL_EXE_DIR}/../lib"
    GOOTOOL_ETC_DIR=`readlink -f ${GOOTOOL_EXE_DIR}/../etc` || die "Can't canonicalise ${GOOTOOL_EXE_DIR}/../etc"
fi

# Verify we have found the right directories

[ -f "${GOOTOOL_LIB_DIR}/gootool.jar" ] || die "Can't find GooTool library directory"

[ -f "${GOOTOOL_ETC_DIR}/logger_properties.txt" ] || die "Can't find GooTool etc directory" 

# Set up the classpath with all jars in lib dir

CLASSPATH=""

for i in ${GOOTOOL_LIB_DIR}/*.jar; do
    if [ ! -z "${CLASSPATH}" ]; then
	CLASSPATH=${CLASSPATH}:
    fi
    CLASSPATH=${CLASSPATH}$i
done

# Allow override of platform detection with env variable GOOTOOL_PLATFORM

JAVAARGS=""

if [ ! -z "${GOOTOOL_PLATFORM}" ]; then
    JAVAARGS="-Dgootool.platform=${GOOTOOL_PLATFORM}"
fi

# Launch in background

$JAVA -cp ${CLASSPATH} -Djava.util.logging.config.file=$GOOTOOL_ETC_DIR/logger_properties.txt ${JAVAARGS} com.goofans.gootool.GooTool $@ &