#!/bin/sh

set -e
vardir="$1"
method=$2
option=$3

cd "$vardir/methods/disk"

. ./shvar.$option

if [ -z "$p_main_packages" -a -z "$p_ctb_packages" -a \
     -z "$p_nf_packages" -a -z "$p_lcl_packages " ]
then
	echo '
No Packages files available, cannot update available packages list.
Hit RETURN to continue.  '
	read response
	exit 0
fi

xit=1
trap '
	rm -f packages-{main,ctb,nf,lcl}
	if [ -n "$umount" ]
	then
		umount "$umount" >/dev/null 2>&1
	fi
	exit $xit
' 0

if [ -n "$p_blockdev" ]
then
	umount="$p_mountpoint"
	mount -rt "$p_fstype" -o nosuid,nodev "$p_blockdev" "$p_mountpoint"
fi

if [ -n "$p_nfs" ]
then
	umount="$p_mountpoint"
	mount -rt nfs "$p_nfs" -o nosuid,nodev "$p_mountpoint"
fi

for f in main ctb nf lcl
do
	eval 'this_packages=$p_'$f'_packages'
	if [ -z "$this_packages" ]; then continue; fi
	case "$p_mountpoint" in
	*/ )	packagesfile="$p_mountpoint$this_packages" ;;
	'' )	packagesfile="$this_packages" ;;
	* )	packagesfile="$p_mountpoint/$this_packages" ;;
	esac
	case "$packagesfile" in
	*.gz | *.Z | *.GZ | *.z)
		echo -n "Uncompressing $packagesfile ... "
		zcat <"$packagesfile" >packages-$f
		echo done.
		dpkg --merge-avail packages-$f
		;;
	'')
		;;
	*)
		dpkg --merge-avail "$packagesfile"
		;;
	esac
done

echo -n 'Update OK.  Hit RETURN.  '
read response

xit=0