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#!/bin/sh

# Exit status codes:
#   0 =  Version reported correctly
#   1 =  Error

TWS_TIMEOUT="15"

if ! test -e "$1"; then
	echo "Usage:   $0 <sh>" 1>&2
	echo "Example: $0 $HOME/.tws_scripts/tws-latest-standalone-linux-x64.sh" 1>&2
	exit 1
fi

ARG1="$(readlink -v -f "$1")" || exit 1

TDIR="$(mktemp -d -t twsdir.XXXX)" || exit 1
trap "rm -rf ${TDIR}" exit
cd "${TDIR}" || exit 1

rm -rf $HOME/.install4j $HOME/.i4j_jres $HOME/tws
chmod +x ${ARG1}
${ARG1} -q &> /dev/null

TWS_HOME="${TDIR}/twshome"
mkdir "${TWS_HOME}" || exit 1
LOG="${TWS_HOME}/launcher.log"

TWS_CP=`find ${HOME}/tws/jars -type f -name \*.jar -printf '%p:'`

java -cp "${TWS_CP}" jclient.LoginFrame "${TWS_HOME}" &
disown
TWS_PID="$!"

# give TWS JVM chance to start writing to $LOG
x=0
while [ "$x" -lt 50 -a ! -e /path/to/the/file_name ]; do
    x=$((x+1))
    sleep .1
done

VERSION_LINE="$(timeout --preserve-status "${TWS_TIMEOUT}" grep -m1 --line-buffered " - Build" "${LOG}")"
kill -9 "${TWS_PID}" &>/dev/null

rm -rf $HOME/.install4j $HOME/.i4j_jres $HOME/tws

if test "${VERSION_LINE}" == ""; then
	echo "could not grep version string" 1>&2
	exit 1
fi

echo "${VERSION_LINE}" |sed -e 's/.*Build //1' -e 's/,.*//1'