PGF error when loading graph-drawing library after updating luaotfload

[non-Jedi]

First of all, I know nothing about this library and only know it's the problem
because downgrading it after a full texlive update fixed the following error.
Would be happy to give any help I can with debugging, but the world of tex is
still a bit of a mystery to me tbh.

When I lualatex a file containing the following:

\documentclass[tikz]{standalone}
\usetikzlibrary{graphs}
\usetikzlibrary{graphdrawing}

\usegdlibrary{layered}
\begin{document}
\begin{tikzpicture}[]
\graph [layered layout, ] {
1/"1" [draw, rounded corners],
2/"2" [draw, rounded corners],
3/"3" [draw, rounded corners],
;
1 -> [blue,edge label={0.37},] 2;
1 -> [blue,edge label={0.55},] 3;
};

\end{tikzpicture}
\end{document}

I get the following error:

! Package pgf Error: Graph drawing library 'layered' not found.

See the pgf package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.5 \usegdlibrary{layered}

When I tlmgr restore luaotfload 47444, the file compiles normally.

[u-fischer]

pgflibrarygraphdrawing.code.tex uses in the definition of pgf_lookup_and_require a function from luaotfload (resolvers.findfile) which has slightly changed, the lua-type is now remapped to the tex-type.

I don't see a way how luaotfload can change here, this is in the imported code from context, so imho the code of graphdrawing has to be adapted.

This here e.g. compiles for me:

\documentclass[tikz]{article}
\usepackage{tikz}

\usetikzlibrary{graphs}
\usetikzlibrary{graphdrawing}
\usepackage{luacode}
\begin{luacode}
  function pgf_lookup_and_require(name)
    local sep = '/'
    if string.find(os.getenv('PATH'),';') then
      sep = '\string\\'
    end
    local function lookup(name)
      local sub = name:gsub('%.',sep)
      local find_func = function (name, suffix)
        if resolvers then
          local n = resolvers.findfile (name.."."..suffix, suffix) -- changed
          return (not (n == '')) and n or nil
        else
          return kpse.find_file(name,suffix)
        end
      end
      if find_func(sub, 'lua') then
        require(name)
      elseif find_func(sub, 'clua') then
        collectgarbage('stop')
        require(name)
        collectgarbage('restart')
      else
        return false
      end
      return true
    end
    return
      lookup('pgf.gd.' .. name .. '.library') or
      lookup('pgf.gd.' .. name) or
      lookup(name .. '.library') or
      lookup(name)
  end
\end{luacode}


\usegdlibrary{layered}
\begin{document}
\begin{tikzpicture}[]
\graph [layered layout, ] {
1/"1" [draw, rounded corners],
2/"2" [draw, rounded corners],
3/"3" [draw, rounded corners],
;
1 -> [blue,edge label={0.37},] 2;
1 -> [blue,edge label={0.55},] 3;
};

\end{tikzpicture}
\end{document}

[non-Jedi]

Alright. Thanks for the info. Do you know if https://sourceforge.net/p/pgf/bugs/ would be the appropriate bug-tracker for this issue?

[u-fischer]

The bug tracker is correct, but I'm not sure yet what is the best to do. I asked on the context list about it https://www.mail-archive.com/ntg-context@ntg.nl/msg89122.html.

[u-fischer]

In view of the answer of Hans Hagen (maintainer of context and the generic fontloader) who wrote

in generic this resolver is just for fonts

I suggest to make a bug report at the pgf issue tracker and to suggest that they ensure that resolvers.findfile is only used when the library is used with context, or at least not when luaotfload has been loaded (which it is by default in latex).

[u-fischer]

I added a bug report to the pgf tracker: https://sourceforge.net/p/pgf/bugs/493/

[u-fischer]

This has been resolved by the newest pgf version.