[luatex] --output-dir from Lua

[Patrick Gundlach]

> ten days ago David Carlisle wrote:
> 
> There may be other ways but:

[...]

> seems to work

indeed, that works fine. Thank you very much. Looking at the solution I should have been able to answer myself, but I was so fixed at looking for some kind of tex.* value that could be accessed from Lua, that I did not think of the "trivial" solution. 

Thanks again, David

Patrick