[NTG-context] Iterate through a directory

Colleagues I'm preparing a booklet of figures which are stored in a directory, however their is no structure in their naming. I could go through them all and rename them along the lines of Pict1.jpg, Pict2.jpg etc and \dostepwiserecurse as in the example below \setupexternalfigures [directory={/a/directory}] \starttext \dostepwiserecurse{1}{10}{1} { \externalfigure[Pict\recurselevel.jpg] } \stoptext However, I was wondering if was possible to iterate through the directory using a wildcard and have something like \externalfigure[*.jpg} to make it generic, or would I have to use lua. Best Wishes Keith