#!/bin/sh
#
# Runs LimeWire.  This script must be executed in your LimeWire
# install directory.

# this should allow starting limewire from
# gui-based explorer interfaces
cd "`dirname "$0"`"

# try to discover java
MSG0="Loading FrostWire:"
MSG1="Starting FrostWire..."
MSG2="Java exec found in "
MSG3="OOPS, your java version is too old "
MSG4="You need to upgrade to JRE 1.4.x or newer from http://www.java.com"
MSG5="Suitable java version found "
MSG6="Configuring environment..."
MSG7="OOPS, you don't seem to have a valid JRE. FrostWire works best with Sun JRE available at http://www.java.com "
MSG8="OOPS, unable to locate java exec in "
MSG9=" hierarchy"
MSG10="Java exec not found in PATH, starting auto-search..."
MSG11="Java exec found in PATH. Verifying..."

look_for_java()
{
 JAVADIR=/usr/lib  
 if look_for_javaImpl ; then
    return 0
 fi 
 JAVADIR=/usr/java
 if look_for_javaImpl ; then
       return 0
 fi
 JAVADIR=/opt
 if look_for_javaImpl ; then
       return 0
 fi
 return 1
}

look_for_javaImpl()
{
  IFS=$'\n'
  potential_java_dirs=(`ls -d1 "$JAVADIR"/j* | sort | tac`)
  for D in "${potential_java_dirs[@]}"; do
    if [[ -d "$D" && -x "$D/bin/java" ]]; then
      JAVA_PROGRAM_DIR="$D/bin/"
      echo $MSG2 $JAVA_PROGRAM_DIR
      if check_version ; then
	return 0
      fi
    fi
  done
  echo $MSG8 "${JAVADIR}/" $MSG9 ; echo $MSG4
  return 1 
}

check_version()
{
  # short-circuit gcj
  ISGCJ=`${JAVA_PROGRAM_DIR}java -version 2>&1 | grep -i gcj`
  if [ "$ISGCJ" != "" ] ; then
      echo $MSG7
      return 1
  fi

  JAVA_HEADER=`${JAVA_PROGRAM_DIR}java -version 2>&1 | head -n 1`
  JAVA_IMPL=`echo ${JAVA_HEADER} | cut -f1 -d' '`
  if [ "$JAVA_IMPL" = "java" ] ; then
    VERSION=`echo ${JAVA_HEADER} | sed "s/java version \"\(.*\)\"/\1/"`
    if echo $VERSION | grep "^1.[0-3]" ; then
      echo $MSG3 "[${JAVA_PROGRAM_DIR}java = ${VERSION}]" ; echo $MSG4
      return 1
    else
      echo $MSG5 "[${JAVA_PROGRAM_DIR}java = ${VERSION}]" ; echo $MSG6
      return 0	      
    fi
  else
    echo $MSG7 "[${JAVA_PROGRAM_DIR}java = ${JAVA_IMPL}]" ; echo $MSG4
    return 1
  fi
}

echo $MSG1

# locate and test the java executable
if [ `uname` = "Linux" ]; then
  if ! command -v java &>/dev/null; then
    echo $MSG10
    if ! look_for_java ; then
      exit 1
    fi
  else
    echo $MSG11
    if ! check_version ; then
      if ! look_for_java ; then
        exit 1
      fi
    fi
  fi
else
  JAVA_PROGRAM_DIR=""
fi

echo $MSG0

export J2SE_PREEMPTCLOSE=1

${JAVA_PROGRAM_DIR}java  -Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.NoOpLog -Djava.library.path=. -jar FrostWire.jar
if [ $? -ne 0 ]; then
    echo 
    echo "******************************************************************"
    echo "Something went wrong with FrostWire."
    echo "Maybe you're using the wrong version of Java?"
    echo "(LimeWire is tested against and works best with with Sun's JRE, Java 1.4+)"
    echo "The version of Java in your PATH is:"
    java -version
    echo 
fi
