[Pharo-project] Headless PetitParser

Hi all, I have a small parser written in PetitParser ;) I would like to call it from a non Smalltalk application (e.g., Java, javascript) or, more generally, from a Unix command line. I was thinking about something like: ./myParser -i fileToParse.txt -o outputFile.txt Is there any possibility to do that? Can a headless Pharo be a solution? If so, how can I start and use a headless Pharo? Is there any useful documentation/email about it? Thank you a lot for any help. Cheers, Alberto