<<snip much good advice from Hans>>
Hi Hans
Thank you for your commnts. Oh, for sure, tinkering with
plain is just an interim step along the (long...) road. A very minimal
"harness setup" to write minimal code --- to play with the various
LuaTeX API functions via GNU's gdb debugger. By building a small test
environment/playground from scratch, including compiling LuaTeX, and
hacking together a basic TDS, gives me a way to learn about stuff like
kpathsea etc. Whether or not it's a good way to learn, the right stuff
to learn, I'm not sure, but I have learnt a lot through trial + error
and not a little frustration, at times... And it keeps me pleasantly
occupied with an absorbing and very low-cost hobby :-)
If there would be any interest, I'd be happy to write it up at some
point if anyone would benefit --- but it'd need scrutiny from resident
experts prior to publication: peer review :-)
Warm wishes
Graham
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