[luatex] Using libraries from luarocks

[Henri Menke]

On 10/8/18 12:08 AM, Nils Pickert wrote:
> Hi all
> 
> I would like to use a library installed by Luarocks with LuaLaTeX (this
> one:  https://github.com/minoki/luaexif )
> 
> As the wiki is currently not working for me and I am a complete Noob:
> how do I do this?
> 
> LuaLateX does not find the library (because it seems to look in the
> texmf paths for it...), so I linked the .so file in the same folder as
> my main tex file.
> 
> It is then found, but complains "Symbol not found: _lua_isinteger"

Typeset your document with luatex53.  The LuaTeX 1.07 shipped with TeX
Live 2018 still uses Lua 5.2 which does not know about integers (all
numbers are doubles).

> 
> My TeX File:
> \documentclass{scrartcl}
> \usepackage{luacode}
> \begin{document}
> Foo
> \begin{luacode}
> local exif = require("exif")
> local data = exif.loadfile("DSCF0274.jpg")
> \end{luacode}
> \end{document}
> 
> I am using MacTeX 2018, which has luatex 1.07.0 (TeX Live 2018)
> The library was installed with luarocks, luarocks itself from homebrew.
> 
> Thanks!
> Nils
> 
>