do-mediainfo v1.2 - build script for the static command line version of MediaInfo

#!/bin/sh

# Build script for the static cli version of MediaInfo v1.2

INSTALL_PATH=~/ubin
WORK_PATH=/media/ramdisk/mediainfo_tmp
CHANGELOG=http://mediaarea.net/MediaInfo/ChangeLog
DOWNLOAD1=http://sourceforge.net/projects/mediainfo/files/binary/mediainfo/
DOWNLOAD2=http://mediaarea.net/download/binary/mediainfo/
OPT=NONE

CLEAN(){
    printf "\nCleaning up... "
    cd ~/
    if rm -drf $WORK_PATH; then
        echo "done."
        exit $1
    else
        echo "not done. Warning: temporary files are still present in $WORK_PATH"
        exit 1
    fi
}

BUILD(){
    echo "Unpacking & compiling binary...   "
    tar -xjf latest.tar.bz2
    cd MediaInfo_CLI_GNU_FromSource
    if ./CLI_Compile.sh; then
        cd $INSTALL_PATH
        if [ -f MediaInfo~ ]; then rm -f MediaInfo~; fi
        if [ -f MediaInfo ]; then mv MediaInfo MediaInfo~; fi
        echo "Compressing & installing MediaInfo to $INSTALL_PATH..."
        upx --lzma -9 $WORK_PATH/MediaInfo_CLI_GNU_FromSource/MediaInfo/Project/GNU/CLI/mediainfo -o MediaInfo
        echo "All done - finished MediaInfo $LATEST_VERS update."
        CLEAN 0
    else
        echo "Unable to compile. Try another source or contact developer!"
        CLEAN 1
    fi
}

echo
if [ -d "$WORK_PATH" ]; then
    rm -rf $WORK_PATH/*
else
    mkdir $WORK_PATH
fi
cd $WORK_PATH
if [ $# -gt 0 ]; then
    if [ $1 = CHECK ] || [ $1 = check ]; then OPT=CHECK
    elif [ $1 = FORCE ] || [ $1 = force ]; then OPT=FORCE
    else
        printf "Unknown option: '"$1"' Try again! ;)\n\n"
        exit 1
    fi
fi
printf "Checking MediaInfo version...   "
if wget -q $CHANGELOG -O changelog; then
    STRING=$(grep -m 1 'Version ' changelog)
    LATEST_VERS=${STRING#*Version\ }
    LATEST_VERS=${LATEST_VERS%,\ 2*}
    if [ -d $INSTALL_PATH ]; then
        echo "Latest version:            "$LATEST_VERS
        if [ -f $INSTALL_PATH/MediaInfo ]; then
            INSTALLED_VERS=$($INSTALL_PATH/MediaInfo --version | grep MediaInfoLib 2>/dev/null)
            INSTALLED_VERS=${INSTALLED_VERS#*\ v}
            printf "                                Current installed version: $INSTALLED_VERS\n\n"
            if [ $LATEST_VERS = $INSTALLED_VERS ]; then
                printf "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
            printf "New version available - "
            if [ $OPT = CHECK ]; then
                echo "update recommended!"
                CLEAN 0
            fi
            echo "starting update."
            fi
        else
            echo "No information about installed version found."
            if [ $OPT = CHECK ]; then CLEAN 0; fi
        fi
    else
        printf "$INSTALL_PATH not found - "
        if [ $OPT = CHECK ]; then
            echo "could not get version information"
        else
            echo "no install possible."
        fi
        CLEAN 1
    fi
else
    echo "Could not find release information - no download possible :("
    CLEAN 1
fi

#LATEST_VERS=0.7.95    # <-- enable this to enforce a certain version

printf "Downloading latest MediaInfo source package...\n\n"
if wget $DOWNLOAD1$LATEST_VERS/"MediaInfo_CLI_"$LATEST_VERS"_GNU_FromSource.tar.bz2" -O latest.tar.bz2; then
    BUILD
else
    printf "No luck with source 1. Trying alternative source...\n\n"
    if wget $DOWNLOAD2$LATEST_VERS/"MediaInfo_CLI_"$LATEST_VERS"_GNU_FromSource.tar.bz2" -O latest.tar.bz2; then
        BUILD
    else
        echo "Unable to download source - try again later!"
        CLEAN 1
    fi
fi