#!/usr/bin/env bash
# Build a Furtka live ISO.
#
# From the repo root or from iso/ on any host with Docker:
#   ./iso/build.sh
#
# The build runs inside a privileged `archlinux:latest` container because
# mkarchiso needs root + loop mounts + an Arch package manager, which
# Ubuntu doesn't provide natively. Output ISO goes to iso/out/.
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
OUT_DIR="$SCRIPT_DIR/out"

if [[ "${FURTKA_ISO_INNER:-0}" != "1" ]]; then
  mkdir -p "$OUT_DIR"
  echo "==> Launching build container"
  exec docker run --rm --privileged \
    -v "$REPO_ROOT:/work" \
    -w /work \
    -e FURTKA_ISO_INNER=1 \
    archlinux:latest \
    bash /work/iso/build.sh
fi

# ---- inside the container from here on ----

echo "==> Syncing pacman, installing archiso"
pacman -Syu --noconfirm --needed archiso

PROFILE_SRC="/usr/share/archiso/configs/releng"
PROFILE_WORK="/tmp/furtka-profile"
BUILD_WORK="/tmp/furtka-build"
OUT_IN_CONTAINER="/work/iso/out"

rm -rf "$PROFILE_WORK" "$BUILD_WORK"
cp -a "$PROFILE_SRC" "$PROFILE_WORK"

echo "==> Overlaying Furtka customizations"

cat "$SCRIPT_DIR/overlay/packages.extra" >> "$PROFILE_WORK/packages.x86_64"

cat "$SCRIPT_DIR/overlay/profiledef.sh" >> "$PROFILE_WORK/profiledef.sh"

cp -a "$SCRIPT_DIR/overlay/airootfs/." "$PROFILE_WORK/airootfs/"

mkdir -p "$PROFILE_WORK/airootfs/opt/furtka"
cp -a "$REPO_ROOT/webinstaller/." "$PROFILE_WORK/airootfs/opt/furtka/"
rm -rf "$PROFILE_WORK/airootfs/opt/furtka/__pycache__"

mkdir -p "$PROFILE_WORK/airootfs/etc/systemd/system/avahi-daemon.service.d"
ln -sf /usr/lib/systemd/system/avahi-daemon.service \
  "$PROFILE_WORK/airootfs/etc/systemd/system/multi-user.target.wants/avahi-daemon.service"

echo "==> Building ISO (mkarchiso)"
mkdir -p "$OUT_IN_CONTAINER"
mkarchiso -v -w "$BUILD_WORK" -o "$OUT_IN_CONTAINER" "$PROFILE_WORK"

echo
echo "==> Done. ISO(s) in $OUT_IN_CONTAINER (on host: iso/out/):"
ls -lh "$OUT_IN_CONTAINER"