# Split out any -J argument for passing to the JVM.
# Scanning for args is aborted by '--'.
declare -a java_args
declare -a ruby_args

while [ $# -gt 0 ]
do
    case "$1" in
    # Stuff after '-J' in this argument goes to JVM
    -J*)
        val=${1:2}
        java_args=("${java_args[@]}" "${1:2}")
        ;;
     # Match switches that take an argument
     -e|-I|-S) ruby_args=("${ruby_args[@]}" "$1" "$2"); shift ;;
     # Match same switches with argument stuck together
     -e*|-I*|-S*) ruby_args=("${ruby_args[@]}" "$1" ) ;;
     # Abort processing on the double dash
     --) break ;;
     # Other opts go to ruby
     -*) ruby_args=("${ruby_args[@]}" "$1") ;;
     # Abort processing on first non-opt arg
     *) break ;;
    esac
    shift
done

# Append the rest of the arguments
ruby_args=("${ruby_args[@]}" "$@")

# Put the ruby_args back into the position arguments $1, $2 etc
set -- "${ruby_args[@]}"

JAVA_OPTS="$JAVA_OPTS ${java_args[@]}"