基于Archlinux的LuaLaTeX与LuaSQL

Question

我正在处理一个LuaLaTeX文件，该文件将使用LuaSQL从我的数据库中获取数据。这是我想出的003-v1.tex和003-v1.lua文件：

003-v1.tex文件：

\documentclass{article}
\usepackage{luacode}

% Lua kodo vpišemo v ločeno datoteko zaradi syntax highlithing
\directlua{dofile('003-v1.lua')}

\newcommand{\stranke}{\luadirect{stranke()}}

\begin{document}
    \begin{tabular}{ll}
        \hline
        id stranke & ime \\
        \hline
        \stranke
        \hline
    \end{tabular}
\end{document} 

003-v1.lua文件：

function stranke ()

    package.cpath = package.cpath .. ";/usr/lib/i386-linux-gnu/lua/5.1/?.so"
    luasql = require "luasql.mysql"

    env = assert (luasql.mysql())
    con = assert (env:connect("linux_krozki","root","mypassword"))
    cur = assert (con:execute("SELECT * FROM stranke"))

    vnos = cur:fetch ({}, "a")

    while vnos do

        print(
            string.format([[%s & %s \\]], vnos.id_stranke, vnos.ime)
        )
        vnos = cur:fetch (vnos, "a")

    end 

end

这个文件应该可以工作，但是当我试图使用lualatex 003-v1.tex编译时，我得到了错误：

This is LuaTeX, Version 1.0.4 (TeX Live 2017/Arch Linux) 
 restricted system commands enabled.
(./003-v1.tex
LaTeX2e <2017-04-15>
(using write cache: /home/ziga/.texlive/texmf-var/luatex-cache/generic)(using r
ead cache: /var/lib/texmf/luatex-cache/generic /home/ziga/.texlive/texmf-var/lu
atex-cache/generic)
luaotfload | main : initialization completed in 0.144 seconds
Babel <3.12> and hyphenation patterns for 1 language(s) loaded.
(/usr/share/texmf-dist/tex/latex/base/article.cls
Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
(/usr/share/texmf-dist/tex/latex/base/size10.clo(load luc: /home/ziga/.texlive/
texmf-var/luatex-cache/generic/fonts/otl/lmroman10-regular.luc)))
(/usr/share/texmf-dist/tex/lualatex/luacode/luacode.sty
(/usr/share/texmf-dist/tex/generic/oberdiek/ifluatex.sty)
(/usr/share/texmf-dist/tex/luatex/luatexbase/luatexbase.sty
(/usr/share/texmf-dist/tex/luatex/ctablestack/ctablestack.sty))) (./003-v1.aux)
003-v1.lua:8: module 'luasql.mysql' not found:
        no field package.preload['luasql.mysql']
        [kpse lua searcher] file not found: 'luasql.mysql'
        [kpse C searcher] file not found: 'luasql.mysql'
        no file '/usr/local/lib/lua/5.2/luasql.so'
        no file '/usr/local/lib/lua/5.2/loadall.so'
        no file './luasql.so'
        no file '/usr/lib/i386-linux-gnu/lua/5.1/luasql.so'
stack traceback:
        [C]: in function 'require'
        003-v1.lua:8: in function 'stranke'
        [\directlua]:1: in main chunk.
\luadirect ... { \luacode@maybe@printdbg {#1} #1 }

l.14         \stranke

根据本题的说法，这个错误是因为LuaLaTeX不能加载模块luasql.mysql，而lua可以自己加载模块。我怎么知道这个？如果在用function stranke ()编译之前从003-v1.lua中注释掉第一行( lua 003-v1.lua )和最后一行(end)，就会得到一个非常好的输出：

1 & Žiga \\
2 & Ranja \\
3 & Romana \\

因此，我的问题是，如何确保模块luasql.mysql在调用LuaLateX时加载？我在Archlinux上，正在使用文本直播。我听说人们在支持luasql的情况下重新编译了文本，但是找不到一步一步的指南.那就太棒了！如果有人已经编好了它，那就更好了。

以下是有关我的纺织品版本的信息：

[ziga@laptop ~]$ pacman -Qs tex | grep live
local/texlive-bibtexextra 2017.44915-1 (texlive-most)                                                                                                                          
local/texlive-bin 2017.44590-2                                                                                                                                                 
local/texlive-core 2017.44918-1 (texlive-most)
local/texlive-fontsextra 2017.44818-1 (texlive-most)
local/texlive-formatsextra 2017.44177-2 (texlive-most)
local/texlive-games 2017.44131-1 (texlive-most)
local/texlive-humanities 2017.44833-1 (texlive-most)
local/texlive-langchinese 2017.44333-1 (texlive-lang)
local/texlive-langcyrillic 2017.44895-1 (texlive-lang)
local/texlive-langextra 2017.44908-1 (texlive-lang)
local/texlive-langgreek 2017.44917-1 (texlive-lang)
local/texlive-langjapanese 2017.44914-1 (texlive-lang)
local/texlive-langkorean 2017.44467-1 (texlive-lang)
local/texlive-latexextra 2017.44907-1 (texlive-most)
local/texlive-music 2017.44885-1 (texlive-most)
local/texlive-pictures 2017.44899-1 (texlive-most)
local/texlive-pstricks 2017.44742-1 (texlive-most)
local/texlive-publishers 2017.44916-1 (texlive-most)
local/texlive-science 2017.44906-1 (texlive-most)

Answer 1

在这个帖子发布后，我们在Archlinux论坛上找到了一个答案。看起来Lua语言存在一些内部问题-- package.cpath无法计算出问题标记，因此?.so不得不改为mysql.so。有人能解释为什么会发生这种事吗？