Writing a de-psfagger

[David Carlisle]

If you run tex first with --recorder you could pick up the file paths
from its log rather than having to re-implement the logic, handling
texinputs path is easy enough as you can use kpsewhich or equivalent
but \graphicspath may be hidden behind arbitrary layers of tex macros,
so you really need a tex engine or a pretty accurate perl emulation
such as latexml.

David