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#

#   Receive a package version into dpkg_archive

#   Script run by ssh to receive a compressed package and to save it

#

#   Assumes that compressed tar output as stdin

#

#set -x

set -e

function error {

    echo ERROR: $*

    exit 1;

}

function delete_dir {

    if [ -d "$1" ] ; then

            chmod -R u+w "$1"

            rm -rf "$1"

    fi

}

# User options

LinkName=

while getopts DL: arg ; do

    case $arg in

        D) set -x ;;

        L) LinkName="$OPTARG" ;;

        *) error Unknown option: $arg ;;

    esac

done

shift $(($OPTIND - 1))

# User arguments

pname=${1:?Need package name}

pver=${2:?Need package version}

dpkg="dpkg_archive"

[ -d $dpkg ] || error dpkg_archive not found

#

#   Names of working directories

#

newdir="$dpkg/${pname}/${pver}.NEW.TMPDIR"

olddir="$dpkg/${pname}/${pver}.OLD.TMPDIR"

realdir="$dpkg/${pname}/${pver}"

pkgdir="$dpkg/${pname}"

#

#   Create package directory

#   Ensure its writable

mkdir -p "$pkgdir"

chmod u+w "$pkgdir"

#

#   Delete possible tmp directory

delete_dir "$newdir"

delete_dir "$olddir"

mkdir -p "$newdir"

chmod u+w "$newdir"

#

#   De-tar the input stream into a working space

tar -zx -C "$newdir"

[ -f "$newdir/descpkg" ] || error Received package does not have descpkg file

#

#   Swap in the new directory - minimize diruption

#   Then delete the old

#

if [ -d "$realdir" ] ; then

    mv "$realdir" "$olddir"

fi

mv "$newdir" "$realdir"

#   Delete the original directory

delete_dir "$olddir"

# Process possible link

if [ "$LinkName" ] ; then

    rm -f "$pkgdir/$LinkName"

    ln -s "$pver" "$pkgdir/$LinkName"

fi

# Fix up permissions on the package and package-version

chmod a-w "$pkgdir"

chmod a-w "$realdir"