#!/bin/sh
# ----------------------------------------------------------------------------
#
# Script to fetch kernel binaries out of given *.deb packages
#
# Creation:      2010-03-06 starwarsfan
# Last modified: $Id$
#
# ----------------------------------------------------------------------------

#set -x
set -e # exit on all non-zero-exiting commands

. common.inc.sh
. functions.inc.sh

doCleanup=true
while [ $# -gt 0 ]
do
    arg="$1"
    shift
    case "$arg" in
        '-v')
            doVerbose=yes
            verbose="-v"
        ;;
        '--no-cleanup')
            doCleanup=false
            cleanup=$arg
        ;;
        *)
            echo "Invalid parameter: $arg"
            exit 1
        ;;
    esac
done



function fetchPackages() {
    local binaryPackagesFile=$1
    local line
    local filename

    cd $downloadPath

    while read line exclude
    do
        filename=$line
        echo "$filename" | grep -q '^#' && continue

        case  $filename in
            *linux-image*|*linux-ubuntu-modules*|*linux-backports-modules*)
                archiveFile=`basename $filename`
                getPackage $filename $archiveFile

                dataArchive=`ar t ${downloadPath}/$archiveFile | grep data.tar`
                ar x ${downloadPath}/$archiveFile $dataArchive
                cd ..
                if [ "${dataArchive/*.}" == 'bz2' ]
                then
                    tar -xjf ${downloadPath}/$dataArchive
                else
                    tar -xzf ${downloadPath}/$dataArchive
                fi
                rm ${downloadPath}/$dataArchive
                rm -rf ./usr*
                ;;
            *)
               # echo "   - Not a kernel package, skipping $filename"
                ;;
        esac
        cd $downloadPath
    done < $binaryPackagesFile
}

function patchBackport() {
    local kernelv="$1"
    if [ -e ${baseDir}/lib/modules/${kernelv}/updates ]
    then
        echo "   - Patch backports to eisfair kernel $kernelv"
        cd ${baseDir}/lib/modules/${kernelv}/updates
        ls | while read filename
        do
             find ${baseDir}/lib/modules/${kernelv}/* -type f -iname "${filename}" \
                -and '(' -path "*/${kernelv}/kernel/*" -or -path "*/${kernelv}/ubuntu/*" ')' \
                -exec mv -f ${baseDir}/lib/modules/${kernelv}/updates/${filename} {} \;

        done
    fi
    cd ${baseDir}
}

cd ${baseDir}

echo " - Preparing working directory"
rm -rf ${baseDir}/boot
rm -rf ${baseDir}/lib

echo " - Updating Ubuntu kernel packages"
fetchPackages $binaryPackagesFileEis


while read kernelversion type
do
    echo "$kernelversion" | grep -q '^#' && continue

    echo " - Creating ${kernelversion}"
    patchBackport ${kernelversion}
    modules=''
    firmware=''
    if [ -d lib/modules/${kernelversion}/ ]
    then
        echo "   - Run depmod ${kernelversion}"
        /sbin/depmod -b ${baseDir} ${kernelversion}
        modules="lib/modules/${kernelversion}/*"
    fi
    rm -f $baseDir/kernel-${kernelversion}.tar.gz
    echo "   - Repack kernel ${kernelversion}"
    rm -f ${baseDir}/boot/config-${kernelversion}
    mkdir -p ${baseDir}/lib/firmware/${kernelversion}
    if [ -d lib/firmware/${kernelversion} ]
    then
        firmware="lib/firmware/${kernelversion}"
    fi
    tar -czf $baseDir/kernel-${kernelversion}.tar.gz boot/*${kernelversion} $modules $firmware
done < $kernelVersions


if $doCleanup
then
    rm -rf ${baseDir}/boot
    rm -rf ${baseDir}/lib
fi
echo "Done."