#!/usr/bin/env bash
# Builds the Das OS live ISO with void-mklive from the profile in live/.
# Runs inside the builder container, see scripts/builder.sh.
set -euo pipefail

repo=/work/out/hostdir/binpkgs
version=$(< /work/VERSION)
iso=/work/out/iso/dasos-${version}-x86_64.iso

if ! compgen -G "$repo/*-repodata" >/dev/null; then
  echo "build-iso: the local package repository is missing, run 'make packages' first" >&2
  exit 1
fi

# Reads a list file: one item per line, '#' starts a comment
read_list() {
  sed -e 's/#.*//' -e '/^[[:space:]]*$/d' "$1" | xargs
}

work=$(mktemp -d)
mkdir -p /work/out/iso
trap 'rm -rf "$work"; chown -R "$HOST_UID:$HOST_GID" /work/out/iso' EXIT

# Root file system overlay: static files from live/include plus generated links
include=$work/include
cp -a /work/live/include "$include"
ln -sf /usr/share/zoneinfo/Europe/Kyiv "$include/etc/localtime"
# PipeWire as the sound server, wired up the same way as Void's own live images
mkdir -p "$include"/etc/xdg/autostart "$include"/etc/pipewire/pipewire.conf.d "$include"/etc/alsa/conf.d
ln -sf /usr/share/applications/pipewire.desktop "$include"/etc/xdg/autostart/
ln -sf /usr/share/examples/wireplumber/10-wireplumber.conf "$include"/etc/pipewire/pipewire.conf.d/
ln -sf /usr/share/examples/pipewire/20-pipewire-pulse.conf "$include"/etc/pipewire/pipewire.conf.d/
ln -sf /usr/share/alsa/alsa.conf.d/50-pipewire.conf "$include"/etc/alsa/conf.d/
ln -sf /usr/share/alsa/alsa.conf.d/99-pipewire-default.conf "$include"/etc/alsa/conf.d/
# The installer shows the Das OS version, which lives in VERSION, not in the package
branding=usr/share/calamares/branding/dasos
mkdir -p "$include/$branding"
sed -e "s/@VERSION@/$version/g" -e "s/@SHORT_VERSION@/${version%.*}/g" \
  "/work/srcpkgs/das-installer/files/calamares/branding/dasos/branding.desc" >"$include/$branding/branding.desc"

# mklive's dracut module creates the live user, hostname and passwords at boot.
# Rebrand its defaults in this container's copy (the image itself stays untouched).
adduser=/opt/void-mklive/dracut/vmklive/adduser.sh
for pattern in 'echo void-live >' 'voidlinux'; do
  if ! grep -q "$pattern" "$adduser"; then
    echo "build-iso: '$pattern' not found in $adduser, mklive changed; update this script" >&2
    exit 1
  fi
done
sed -i -e 's/echo void-live >/echo dasos >/' -e 's/voidlinux/live/g' "$adduser"
# mklive copies its /etc/issue (Void live logins) into the image, and the
# installer copies the image to disk, so use a neutral Das OS one.
cp /work/live/branding/issue /opt/void-mklive/data/issue

rsvg-convert /work/live/branding/splash.svg --output "$work/splash.png"
rm -f "$iso"

cd /opt/void-mklive
SPLASH_IMAGE=$work/splash.png ./mklive.sh \
  -a x86_64 \
  -r "$repo" \
  -c /var/cache/xbps \
  -p "$(read_list /work/live/packages.x86_64)" \
  -S "$(read_list /work/live/services)" \
  -I "$include" \
  -l uk_UA.UTF-8 \
  -k us \
  -T "Das OS" \
  -C "live.user=live quiet loglevel=3" \
  -o "$iso"