[luatex] invoking a lua script in TeX

[Bob Tennent]

Dirk:

I've added 

\ifx\undefined\directlua \else \directlua { 
   musixflx = kpse.find_file("musixflx.lua")
   dofile(musixflx)}%
\fi% 

to the definition of \endmuflex and it basically works. But when I add
an assignment to the lua code as follows:

\ifx\undefined\directlua \else \directlua { 
   name_of_file = \jobname 
   musixflx = kpse.find_file("musixflx.lua")
   dofile(musixflx)}%
\fi% 

it no longer works. According to "Writing Lua in TeX" at the luatex
wiki, I need to set \endlinechar=10 or \catcode`\^^M=12 but where?

Bob