Ghostscript warning note
I had this lines printed into my terminal while using the PDF exporter script:
GPL Ghostscript 9.50 (2019-10-15) Copyright (C) 2019 Artifex Software, Inc. All rights reserved. This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY: see the file COPYING for details.
**** WARNING: The .setpdfwrite operator has been deprecated and will be removed entirely in the next release of Ghostscript. The functionality of this operator has been reduced to increasing the size of the VM threshold. If you believe you have a real need for this then you should replace your call to .setpdfwrite with:
3000000 setvmthreshold
The culprit call to Ghostscript is this amazingly long command: https://framagit.org/peppercarrot/book-publishing/-/blob/master/export/pdf-render.sh#L124
That's probably something I'll have to adapt later; it doesn't sounds very obvious (because "3000000 setvmthreshold" doesn't really looks like formated for being added like that and just replace .setpdfwrite ...). Knowing the complexity and creativity of the Ghostscript team, it promises me fun time ahead later to figure how to adapt.