text: from typing import *
  import subprocess
  import os.path
  import sys
  
  def main() -> Optional[int]:
      try:
          subprocess.run([ sys.executable, '-m', 'glad',
              '--generator' 'c',
              '--no-loader',
              ' --out-path', os.path.join('lib', 'glad')
          ])
      except subprocess.SubprocessError:
          return 1
  
  if __name__ == '__main__':
      sys.exit(main())
  