# Stage the prebuilt static nucleic-linux-agent binary (the guest vsock control-plane
# agent, built per-arch from guest/nucleic-linux-agent/src/agent.c) plus its systemd unit
# and a static enable symlink. The unit is the single source in guest/…/systemd — staged
# here so the deb and the pre-narOS Ubuntu payload path can never drift.
#
# The enable symlink is shipped statically (not via `systemctl enable` in a postinst) so it
# takes effect inside the mmdebstrap chroot, where no systemd is running (NAROS.md §4).
stage() {
  local dest="$1" arch="$2"
  local bin="$OS_DIR/dist/bin/nucleic-linux-agent-$arch"
  local unit="$OS_DIR/../guest/nucleic-linux-agent/systemd/nucleic-linux-agent.service"
  if [ ! -x "$bin" ]; then
    echo "prebuilt binary missing: $bin" > "$dest/.skip-reason"
    return 1
  fi
  install -D -m 0755 "$bin" "$dest/usr/local/bin/nucleic-linux-agent"
  install -D -m 0644 "$unit" "$dest/usr/lib/systemd/system/nucleic-linux-agent.service"
  install -d "$dest/etc/systemd/system/multi-user.target.wants"
  ln -sf /usr/lib/systemd/system/nucleic-linux-agent.service \
    "$dest/etc/systemd/system/multi-user.target.wants/nucleic-linux-agent.service"
}