[Dev-luatex] Start LuaTeX with Lua only?

[David Kastrup]

Ok, this is actually kind of stupid since Taco and Hans are sitting
right before me, but we are in the middle of a talk.

Is there a way to start LuaTeX with just a Lua file, but have this Lua
file feed TeX input to a TeX process, via tex.print or similar?

Or do we always need to have a TeX file which does some \directlua call
before we can have Lua feeding TeX input to a TeX interpreter?

-- 
David Kastrup