#!/bin/bash

# build the iso
. config || exit 0

if [ "$1" != "ok" ]; then
    if [ -e ${ISO} ] || [ -e ${FS} ]; then
        echo "remove \"${ISO}\" and \"${FS}\" dirs first,"
        echo "or pass \"ok\" as an argument to remove them"
        exit 0
    fi
fi

set -x
set -e

# download it if it doesn't exist
if ! [ -e ${ORIG} ] ; then
    mkdir -p $(dirname ${ORIG})
    if [ -e $(dirname ${ORIG})/../$(basename ${ORIG}) ] ; then
        # grab from parent directory
        cp $(dirname ${ORIG})/../$(basename ${ORIG}) ${ORIG}
    else
        # grab from web
        wget -O "${ORIG}" "${ORIGURL}"
    fi
fi

# mount it
sudo umount ${MNT} || true
sudo rm -rf ${MNT} ${ISO} ${FS}
sudo mkdir ${MNT}
sudo mount -o loop,ro "$ORIG" ${MNT}

# copy data
sudo mkdir ${ISO}
sudo rsync --exclude=/casper/filesystem.squashfs -a ${MNT}/ ${ISO}
sudo chown -R ${NONPRIV_UID} ${ISO}
chmod -R u+w ${ISO}

# copy squashfs
sudo unsquashfs -d ${FS} ${MNT}/casper/filesystem.squashfs

sudo umount ${MNT}