#!/bin/sh

# usb2iso

# For use (especially) after a usb-stick larch system (syslinux based
# only at the moment) has been modified, this will generate a bootable
# iso from it.

# WARNING - a lot of space is needed as the whole cd content must be copied.

# $1 is the mount point of the usb-stick. If none use /.livesys/medium
# (i.e. assuming it is being run from a larch system).
# The iso will be generated in the current working directory.
#===================================================================
# 2008.04.21

ISOLINUXBIN=/usr/lib/syslinux/isolinux.bin

APP="$( basename $0 )"
# Get path to larch base directory, via the location of this script
FULLPATH="$( readlink -f $0 )"
SCRIPTDIR="$( dirname ${FULLPATH} )"

mkiso ()
{
    mkisofs -r -l $1 \
        -no-emul-boot -boot-load-size 4 -boot-info-table \
        -input-charset=UTF-8 \
        -publisher "designed by gradgrind, licence: GPL" \
        -A "larch-5" \
        -o "livecd.iso" "${CDDATA}"

    if [ $? -eq 0 ]; then
        echo "// Your ISO has been created as livecd.iso"
    else
        echo "ERROR: iso build failed" 1>&2
        return 1
    fi
}

if [ -z "$1" ]; then
    if [ -d /.livesys/medium/larch ]; then
        MP=/.livesys/medium
    else
        echo "Must pass usb-stick mount-point as argument"
        exit 1
    fi
else
    if ! [ -d "$1/larch" ]; then
        echo "No larch system found at $1"
        exit 1
    fi
    MP="$( readlink -f $1 )"
fi

CDDATA=$( pwd )/bootcd
rm -rf ${CDDATA}
mkdir -p ${CDDATA}

if ! cp -r ${MP}/syslinux ${CDDATA} &>/dev/null; then
    echo "No larch boot files found at ${MP}/syslinux"
    exit 1
fi
mv ${CDDATA}/syslinux ${CDDATA}/isolinux
mv ${CDDATA}/isolinux/syslinux.cfg ${CDDATA}/isolinux/isolinux.cfg
if ! cp ${ISOLINUXBIN} ${CDDATA}/isolinux; then
    echo "Couldn't find isolinux.bin"
    exit 1
fi

echo "Copying data, this could take a while"
cp -r ${MP}/larch ${CDDATA}
cp ${MP}/system.sqf ${CDDATA}
cp ${MP}/mods.sqf ${CDDATA}
cp ${MP}/overlay.ovl ${CDDATA}

mkiso "-b isolinux/isolinux.bin -c isolinux/isolinux.boot"