Update PDF Export Preset list when updated outside of InDesign

Answered for now thus closed

Modifications to app.pdfExportPresets will create new items in the filesystem.

For instance, this code of ours goes to some extremes to make sure to clean up the .joboptions file that gets inadvertantly created:

var pdfPreset;
     pdfPreset = findLastItemRegexp(/^Mass Web /, app.pdfExportPresets); // private function
...
     if (spreads) {
       // Sadly, this actually creates a file in the filesystem, so we
       // need to be quite careful and not willy-nilly duplicate pdf
       // presets, etc.
       spreadPdfPreset = pdfPreset.duplicate();
       try {
            spreadPdfPreset.exportReaderSpreads = true;
            spreadPdfPreset.name = pdfPreset.name + " SPREADS";
            doPdfExport(spreadPdfPreset);
       } catch (e0) {
            alert("Caught "+e0.message+
            "while exporting PDF as spreads.");
       } finally {
            spreadPdfPreset.remove();
       }
      } else {
        doPdfExport(pdfPreset);
      }

Hopefully that's sufficient to get you going?

I guess it's not exactly what you want -- you want to import the JobOptions file externally, rather than construct it within your script -- hopefully this will help though.