#!/bin/sh

outdev=samizdat.iso
indev=debian-live-8.4.0-amd64-standard.iso
volid=SamizdatLive
gpg_iso_path=gnupghome
gnupghome=gnupghome
secrets=secrets

if [ $# = 0 ]; then
    set -- debian-live-8.4.0-amd64-standard.btrfs layer.btrfs
fi

for fs; do
    [ -f "$fs" ] || exit 1
    shift
    set -- "$@" "rootfs/${fs##*/}=$fs"
done

die() { printf '%s\n' "$*"; exit 1; }

make_gnupghome()
{
  [ -d "$gnupghome" ] && return
  local reset=$-
  set -e
  [ ! -d "$gnupghome".tmp ] || die "Error: refusing to overwrite $gnupghome.tmp"
  [ ! -d "$secrets".tmp   ] || die "Error: refusing to overwrite $secrets.tmp"
  mkdir -p "$gnupghome".tmp "$secrets".tmp
  local PATH="$HOME"/src/samizdat/src:"$PATH" NO_USE_RAMFS=y
  NEW_GNUPGHOME="$gnupghome".tmp SECRETS_DIRECTORY="$secrets".tmp ~/src/samizdat/src/samizdat-make-key --adam
  mv "$secrets".tmp "$secrets"
  mv "$gnupghome".tmp "$gnupghome"
  set -$reset
}

make_gnupghome

if [ grub-efi.sh -nt grub-efi ]; then
    ./grub-efi.sh || die "Error: grub-efi.sh failed"
fi

set -ex

xorriso \
        -drive_class clear_list all \
        -outdev "$outdev"~ \
        -report_about mishap \
        -return_with sorry 0 \
        -volid "$volid" \
        -pathspecs on \
        \
        \
        -add "${gpg_iso_path}=${gnupghome}" -- \
        -add linux=isolinux/linux -- \
        \
        \
        -as mkisofs -graft-points \
        -b grub/i386-pc/eltorito.img  \
        -no-emul-boot -boot-info-table \
        --embedded-boot grub-efi/embedded.img \
        --protective-msdos-label \
        grub=grub-efi/grub

mv -f "$outdev"~ "$outdev"