there’s no need to call perl as the script does
Yeah, I noted that, too. The workflow combines Javascript, Python, Applescript, Perl, shell (and maybe more). Personally, I’d like to see more Prolog in there. 
But hey, I’m not complaining. If I did, I should write my own. Don’t have the time, as I would have to get up to speed with a lot of things first. If my kludges take me through DT4 and Alfred 5, I might make it to retirement. After that, no need for shortcuts anymore, I will have all the time in the world.