#!/bin/bash
# build-iso.sh -- the demo's ISO: the amd64 kernel's loader on an El Torito ISO, packed as
# `make -f kernel/Makefile ARCH=amd64 qemu` packs it (kernel/Makefile, target qemu).
#
#   demo/build-iso.sh <out.iso> [VAR=value ...]
#
# The VAR=value arguments go to the kernel build: EMERGENCY_CONSOLE_ENABLED=1 for a console with
# no identity drive -- one of the two answers to issue #111, not yet ruled. A nightly's
# StarshipOS.iso can be used in place of this, once the ruling says which image the demo serves.
set -euo pipefail
cd "$(dirname "$0")/.."
out=$(realpath -m "${1:?usage: demo/build-iso.sh <out.iso> [VAR=value ...]}"); shift
make --no-print-directory -f kernel/Makefile ARCH=amd64 clean
make --no-print-directory -f kernel/Makefile ARCH=amd64 all "$@"
tmp=$(mktemp -d); trap 'rm -rf "$tmp"' EXIT
dd if=/dev/zero of="$tmp/efi.img" bs=512 count=8192 2>/dev/null
mformat -i "$tmp/efi.img" ::
mmd     -i "$tmp/efi.img" ::/EFI ::/EFI/BOOT
mcopy   -i "$tmp/efi.img" build/amd64/kernel/starkernel_loader.efi ::/EFI/BOOT/BOOTX64.EFI
xorriso -as mkisofs -r -J -e efi.img -no-emul-boot -o "$out" "$tmp" 2>/dev/null
git checkout -q -- capsules/BLOCK_MAP.md v3/include/version.h 2>/dev/null || true   # the build regenerates these
echo "demo: $out"