How do I get a list of all available fonts for luaotfload?

Question

luaotfload uses an internal database that gets updated with mkluatexfontdb. So it knows about a lot of fonts installed on my computer. How can I query this database? Something like

luatexfontdb --list-fonts-on-my-computer-that-are-in-your-database

?

Answer 1

You could open the database in your editor. It is called otfl-names.lua and should be in one of your texmf-trees in \luatex-cache\generic\names.

It is also not very difficult to make lists based on otfl-names.lua. E.g.

Old version (Texlive 2013?)

\documentclass{article}
\usepackage{luacode,luaotfload}
\begin{document}
\begin{luacode}
myfonts=dofile(fonts.names.path.localdir..'/otfl-names.lua')

for i,v in ipairs(myfonts.mappings) do
 tex.print(-2, v.familyname)
 tex.print(', ')
 tex.print(-2, v.fontname)
 tex.print('\\par')
end

\end{luacode}

\end{document}

Edit in may 2013: With a newer luaotfload (as the one in TL2013 (pretest) one should exchange the myfonts line by this one as the name of the database as changed:

 myfonts=dofile(fonts.names.path.path)

Edit for Texlive 2014

I tried again in TL 2014 (june 2014). Now the names file is in a .luc and the access name has changed again. I also added some "if exist code" to avoid error if a table entry doesn't exist for a font:

\documentclass{article}
\usepackage{luacode}
\usepackage{luaotfload}
\begin{document}
\begin{luacode}
myfonts=dofile(fonts.names.path.index.luc)

tex.sprint(fonts.names.path.index.luc)

---[[
for i,v in ipairs(myfonts.mappings) do
 if v.familyname then
 tex.print('\\par')
 tex.print(-2, v.familyname)
 end
 if v.fontname then 
 tex.print(', ')
 tex.print(-2, v.fontname)
 end
 tex.print('\\par')
end
--]]

\end{luacode}

\end{document}

Edit for TeXlive 2015 / MiKTeX in july 2015

The code do get the names file has to be adapted again. Now this here seems to work.

\documentclass{article}
\usepackage{luacode}
\usepackage{luaotfload}
\begin{document}
\begin{luacode}
myfonts=dofile(config.luaotfload.paths.index_path_luc)

tex.sprint(config.luaotfload.paths.index_path_luc)

---[[
for i,v in ipairs(myfonts.mappings) do
 if v.familyname then
 tex.print('\\par')
 tex.print(-2, v.familyname)
 end
 if v.fontname then
 tex.print(', ')
 tex.print(-2, v.fontname)
 end
 tex.print('\\par')
end
--]]

\end{luacode}

\end{document}

Answer 2

Based on Ulrike's answer:

Because I don't want to create a TeX document every time I need the font list, here is a simple script for that:

#!/usr/bin/env texlua

kpse.set_program_name("listluatexfonts")

cachefile  = kpse.expand_var("$TEXMFVAR")  .. "/luatex-cache/generic/names/otfl-names.lua"
fontlist = dofile(cachefile)
assert(fontlist,"Could not load font name database")

local tmp = {}

for _,font in ipairs(fontlist.mappings) do
  tmp[#tmp + 1] = font.fontname
end
table.sort(tmp)

for _,fontname in ipairs(tmp) do
  print(fontname)
end

call it with

./listluatexfonts

---

Update:

Replace the cachefile name for TexLive 2014:

cachefile  = kpse.expand_var("$TEXMFVAR")  .. "/luatex-cache/generic/names/luaotfload-names.luc"

This one worked for me.

Answer 3

 luafindfont -n "*"

lists all fonts which can be used by xelatex/ lualatex without a special path setting. -n is "no symbolic names column"