#!/bin/sh
#@include core
#@include iso
#@mainifyme

## TODO: provide a parameter which defines what to be done in the new iso root
set -efu
isofile=${1:-archlinux-2013.06.01-dual.iso}
outfile=$(basename ${isofile%.iso}.krebs.iso)
info "outfile will be at $outfile"
bdir=${bdir:-$HOME/build/arch}
isodir=$bdir/iso
isomnt=$bdir/isomount
rootdir=$bdir/root
outdir=$bdir/out
auto_url=${2:-conf.krebsco.de/arch_autoinstall}
info "bdir is at $bdir"
[ ! -e "$isofile" ] && die "$isofile does not exist."
esudo "$@"
arch_label="$(get_volid "$isofile")"
info "Arch iso label is ${arch_label}"
info "auto_url is $auto_url"

info "cleanup root dir"
rm -rf $bdir
mkdir -p $isomnt $rootdir 
info "mounting isofile ($isofile)"
if is_root;then
    mount -t iso9660 -o loop,ro $isofile $isomnt
else
    die 'we are not root enough to mount the iso.'
fi
defer "info 'unmounting $isomnt';umount $isomnt"

info "copying from '$isomnt' to '$isodir'"
cp -a "$isomnt" "$isodir"
defer "info 'removing $isodir';rm -rf $isodir"
info "extracting root-image squashfs"
# we will not touch the kernel ... yet

for arch in x86_64 i686;do
    info "unpacking $isomnt/arch/$arch/root-image.fs.sfs"
    mkdir -p "$outdir/$arch"
    defer "info 'removing $outdir/$arch';rm -rf $outdir/$arch"
    mkdir -p "$rootdir/$arch"
    defer "info 'removing $rootdir/$arch';rm -rf $rootdir/$arch"
    unsquashfs -f -d "$outdir/$arch" "$isodir/arch/$arch/root-image.fs.sfs"

    mount "$outdir/$arch/root-image.fs" "$rootdir/$arch"
    defer "info 'unmounting $rootdir/$arch';umount $rootdir/$arch||info 'not mounted'"

    info "Starting of the rootdir verkrepelung"
    # do the magic here
    arch-chroot $rootdir/$arch <<EOF
    cat >> /root/.zshrc<<EOL
cat << EOD
This is the Krebs Autoinstaller, we will do all the right things.
Just Wait until everything finished.

- Make sure that RJ45 is connected
- you can bail out of the progress at any time with CTRL-C
    /krebs/autoinstall (args)
EOD
/krebs/autoinstall
EOL

    mkdir /krebs
    cat > /krebs/autoinstall <<EOL
internet() { ping -w 1 google.de >/dev/null 2>&1; }
while ! internet;do
  echo "no Internet yet, waiting ..."
  sleep 3
done

echo "Grabbing current version of install-script from $auto_url"
echo
echo "AGENTS ARE GOOOOOOOOOOO!"
curl "$auto_url" 2>/dev/null | sh -s "\\\$@"
EOL
chmod 755 /krebs/autoinstall
EOF
    info "deleting old squashfs"
    rm "$isodir/arch/$arch/root-image.fs.sfs"
    info "creating squashfs at $isodir/arch/$arch/root-image.fs.sfs"
    umount "$rootdir/$arch"
    mksquashfs  "$outdir/$arch/root-image.fs" "$isodir/arch/$arch/root-image.fs.sfs"
done

info "creating Iso Image"
rm -f "${outdir}/${outfile}"
xorriso -as mkisofs \
    -iso-level 3 \
    -full-iso9660-filenames \
    -volid "${arch_label}" \
    -appid "Shackspace Krebs Installer" \
    -publisher "Shackspace/Krebs" \
    -preparer "prepared by krebs" \
    -eltorito-boot isolinux/isolinux.bin \
    -eltorito-catalog isolinux/boot.cat \
    -no-emul-boot -boot-load-size 4 -boot-info-table \
    -isohybrid-mbr ${isomnt}/isolinux/isohdpfx.bin \
    -output "${outdir}/${outfile}" \
    "$isodir"