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{ pkgs, ... }:

pkgs.writeScriptBin "show-qr-code" ''
  #!/bin/sh
  TMP=$(mktemp)
  trap 'rm "$TMP"' EXIT

  if [ "$1" = "" ]; then
    ${pkgs.qrencode}/bin/qrencode -s 8 --8bit -o "$TMP" -t PNG
  else
    ${pkgs.qrencode}/bin/qrencode -s 8 -o "$TMP" -t PNG "$1"
  fi

  export DIALOG='
  <vbox>
      <pixmap>
          <input file>'"$TMP"'</input>
      </pixmap>
  </vbox>
  '

  ${pkgs.gtkdialog}/bin/gtkdialog --program=DIALOG > /dev/null &
  sleep 0.2
''