do-hybrid.bash 1.0

#!/bin/bash

echo
if [ $(uname -m) = x86_64 ]; then
    INSTALL_PATH=~/hybrid64
    ARCH=64bit
else
    INSTALL_PATH=~/hybrid
    ARCH=32bit
fi

WORK_PATH=/media/ramdisk
HOME=http://www.selur.de
OPT=NONE

function CLEAN()
{
    echo -ne "\nCleaning up... "
    cd $WORK_PATH
    rm -rf hybrid_tmp
    echo "done."
    exit $1
}

echo $ARCH" architecture found."
if [ $# -gt 0 ]; then
    if [ $1 = CHECK ] || [ $1 = check ]; then OPT=CHECK
    elif [ $1 = FORCE ] || [ $1 = force ]; then OPT=FORCE
    else
    echo -e "Unknown option: '"$1"' Try again! ;)\n"
    exit 1
    fi
fi
mkdir $WORK_PATH/hybrid_tmp
cd $WORK_PATH/hybrid_tmp
echo -n "Checking Hybrid version...   "
if wget -q $HOME/changelog; then
    STRING=$(grep -m 1 '<ul><li><strong>rev ' changelog)
    LATEST_VERS=${STRING#*rev}
    LATEST_VERS=${LATEST_VERS%:</strong>*}
    if [ -d $INSTALL_PATH ]; then
    echo "Latest version:           "$LATEST_VERS
    if INSTALLED_VERS=$(cat $INSTALL_PATH/version 2>/dev/null); then
        echo -e "                             Current installed version: "$INSTALLED_VERS"\n"
        if [ $LATEST_VERS = $INSTALLED_VERS ]; then
        echo -n "Installed version is already the latest"
        if [ $OPT = CHECK ]; then
            echo " - no update necessary."
            CLEAN 0
        fi
        if [ $OPT = FORCE ]; then echo ", but FORCE option was called. Updating anyway."
        else
            read -p " - update anyway (y/N)? " YN
            case $YN in
            [Yy]*)
                echo "Starting update..."
                ;;
            *)
                echo "Nothing changed."
                CLEAN 0
                ;;
            esac
        fi
        else
        echo -n "New version available - "
        if [ $OPT = CHECK ]; then
            echo "update recommended!"
            CLEAN 0
        fi
        echo "starting update."
        OPT=NEW
        fi
    else
        echo "No information about installed version found."
        OPT=NEW
    fi
    else
    echo "no Hybrid folder found - creating new directory and installing latest version."
    mkdir $INSTALL_PATH
    OPT=NEW
    fi
else
    echo "Could not find release information - no download possible :("
    CLEAN 1
fi
if wget -q $HOME/downloads; then
    STRING=$(grep -m 1 ">Hybrid Linux"$ARCH downloads)
    LINK=${STRING#*>Hybrid\ Linux$ARCH:\ <a\ href=\"}
    LINK=${LINK%\">Qt\ 5.2*}
    echo -e "Downloading latest Hybrid package...\n"
    if wget $HOME$LINK; then
    echo -n "Unpacking & installing Hybrid binary...   "
    unzip Hybrid*.zip
    chmod +x Hybrid
    upx -d Hybrid &>/dev/null
    cd $INSTALL_PATH
    if [ -f Hybrid~ ]; then rm -f Hybrid~; fi
    if [ -f Hybrid ]; then mv Hybrid Hybrid~; fi
    if upx --lzma --ultra-brute $WORK_PATH/hybrid_tmp/Hybrid -o Hybrid; then
        if [ $OPT = NEW ]; then echo $LATEST_VERS >version; fi
    fi
    CLEAN 0
    else
    echo "Unable to download Hybrid binary package. Try again later or contact developer!"
    CLEAN 1
    fi
else
    echo "Unable to access download page - no download possible :("
    CLEAN 1
fi