#!/bin/sh

# Copyright (C) 2012 Turn, Inc.
#
# Licensed 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.

EXECJAR="ttorrent-*-shaded.jar"

real_path() {
    case $1 in
        /*)
            SCRIPT="$1"
            ;;
        *)
            PWD=`pwd`
            SCRIPT="$PWD/$1"
            ;;
    esac
    CHANGED=true
    while [ "X$CHANGED" != "X" ] ; do
        # Change spaces to ":" so the tokens can be parsed.
        SAFESCRIPT=`echo $SCRIPT | sed -e 's; ;:;g'`
        # Get the real path to this script, resolving any symbolic links
        TOKENS=`echo $SAFESCRIPT | sed -e 's;/; ;g'`
        REALPATH=
        for C in $TOKENS; do
            # Change any ":" in the token back to a space.
            C=`echo $C | sed -e 's;:; ;g'`
            REALPATH="$REALPATH/$C"
            # If REALPATH is a sym link, resolve it.  Loop for nested links.
            while [ -h "$REALPATH" ] ; do
                LS="`ls -ld "$REALPATH"`"
                LINK="`expr "$LS" : '.*-> \(.*\)$'`"
                if expr "$LINK" : '/.*' > /dev/null; then
                    # LINK is absolute.
                    REALPATH="$LINK"
                else
                    # LINK is relative.
                    REALPATH="`dirname "$REALPATH"`""/$LINK"
                fi
            done
        done
        if [ "$REALPATH" = "$SCRIPT" ] ; then
            CHANGED=""
        else
            SCRIPT="$REALPATH"
        fi
    done
    echo "$REALPATH"
}

base=$(dirname $(real_path $0))
CPARG=$(find ${base}/../build -name "$EXECJAR" | tail -n 1)
if [ -z "$CPARG" ] ; then
    echo "Unable to find $EXECJAR"
    exit 1
fi
if [ -z "$MAINCLASS" ] ; then
    CPARG="-jar $CPARG"
else
    CPARG="-cp $CPARG $MAINCLASS"
fi
exec java $CPARG "$@"