Skip signing file if already signed

[jespersh]

I'd like to request a checkbox to allow skipping already signed files.

From a .bat script I have the following to skip those files:

echo "%~1\Signtool\signtool.exe" verify /pa %2 
>NUL 2>&1 "%~1\Signtool\signtool.exe" verify /pa %2 && (
  echo File %2 is already signed, skipping
) || (
  "%~1\Signtool\signtool.exe" sign /tr http://timestamp.digicert.com /td sha256 /f "%~1\certificate.pfx" /p secretcode /fd sha256 %2
  exit /b 0
)