Cfrgtkky

This was working and I don't see what has changed, but the code below is now throwing a "Missing endcsname inserted" error.

If I just press Return, lualatex continues, reads the text file myfile.lua, and prints it perfectly verbatim. Doesn't seem to matter whether the file is UTF-8 or ASCII encoded (I usually use the former). Windows 10 machine if that matters.

MWE

documentclass{article}



RequirePackage{verbatim}%



RequirePackage{luacode}%



begin{luacode*}

function buildPath(...)                                                                                       

    -- get the system path separator                    

    local pathseparator = package.config:sub(1,1)       



    -- get the arguments                                

    local elements = {...}                              



    -- return the elements with the path separator      

    return table.concat(elements, pathseparator)        

end                                                     



-- Get the current path.             

function getPath(filename)                                                                                     

-- Print the current path. According to the documentation, if -2 is used, 

-- then the strings are read as if the result of detokenize: all characters 

-- have catcode 12 except space, which  has catcode 10.   



    tex.print(-2, buildPath(lfs.currentdir(), filename))

end       

end{luacode*}



DeclareRobustCommandgetPath[1]{luadirect{getPath(luastring{#1})}}



begin{document}



verbatiminput{getPath{myfile.lua}}



end{document}   

This never worked. Don't use a robust command inside verbatiminput. So define your getPath as

newcommandgetPath[1]{luadirect{getPath(luastring{#1})}}