#!/usr/bin/env bash
set -euo pipefail

DEVICE="${KMSCUBE_DRM_DEVICE:-/dev/dri/card0}"

if ! command -v kmscube >/dev/null 2>&1; then
  echo "kmscube is not installed" >&2
  exit 127
fi

if [ ! -e "$DEVICE" ]; then
  for candidate in /dev/dri/card*; do
    if [ -e "$candidate" ]; then
      DEVICE="$candidate"
      break
    fi
  done
fi

if [ ! -e "$DEVICE" ]; then
  echo "No DRM card device found" >&2
  exit 1
fi

exec kmscube -D "$DEVICE"