Problem passing a table as an argument to my class using the environment NiceTabularX and tabularray

Question

I'm very used to come here often to debug my code and find solutions to my problem. But it's the first time i cannot find a solution to my exact problem or something i could adapt for my case. So here i am with my question. Sorry in advance if my wording is not perfect, i'm not a TeX expert but rather an enthusiast.

I am currently writing a .cls class file to write my reports. I renew the maketitle command to create my cover page. There are 2 tables i want to fill automatically. A MWE example

My main tex file is built as follows:

\documentclass{MyClass}

\revision{
2015-03-31 & John Doe\\ \hline
2015-04-01 & Jane Doe\\ \hline
& \\ \hline
}

\diffusion{%
Company A & John Doe\\ \hline
Company B & Jane Doe\\ \hline
}

\begin{document}
\maketitle
\end{document}

I use the commands \revision and \diffusion to pass the content of the table into my class file. The class is built as follows:

% My class
\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{MyClass}[my beautiful class]
\LoadClass[11pt]{article}
\DeclareOption*{\PassOptionsToClass{\CurrentOption}{article}}
\ProcessOptions\relax

% -- Some packages
\RequirePackage{lmodern}
\RequirePackage[T1]{fontenc}
\RequirePackage[utf8]{inputenc}
\RequirePackage[english,french]{babel}

\RequirePackage{array,tabularx,hhline}
\RequirePackage{graphicx,colortbl,import}
\RequirePackage[dvipsnames,table]{xcolor}
\RequirePackage{geometry}
\RequirePackage{nicematrix}
\RequirePackage{tabularray}
\RequirePackage{makecell}

\definecolor{softgray}{gray}{0.9}

\newcommand{\revision}[1]{\def\nt@revision{#1}}
\newcommand{\diffusion}[1]{\def\nt@diffusion{#1}}

\geometry{a4paper,twoside,pdftex,
        lmargin=1.91cm,
        rmargin=1.91cm,
        tmargin=4cm,
        headheight=24mm,
        textheight=22cm,
        headsep=0.5cm,
        footskip=0.5cm
}

\renewcommand{\arraystretch}{1.5}
     
\renewcommand{\maketitle}{
\pagestyle{plain}

\section*{Revision}
\noindent
\begin{NiceTabularX}{\textwidth}{|l|X|}[colortbl-like] 
\hline
\rowcolor{softgray} Date & Author \\ \hline
\nt@revision
\end{NiceTabularX}

% Not working starting from here
\section*{Diffusion}
\noindent
\begin{tblr}{
    colspec = {|l|X|},
    rowspec={Q[m]Q[m]Q[m]Q[m]Q[m]Q[m]Q[m]Q[m]Q[m]Q[m]},
    rowsep = 3pt,
    width = \textwidth,
    }
    \hline
    \SetCell{bg=softgray}\textbf{Company} & \SetCell{bg=softgray}\textbf{Name} \\ \hline
    \nt@revision
\end{tblr}
}

The tables need to have the first row with a gray background. I had issues with pdf viewers where the border lines of the tables would disappear (covered by the background color). I could find partial solution here.

• I found on this website that i could use NiceTabularX with the option [colortbl-like] to avoid the problem of the lines disappearing. It works (see the table built in the \section*{Revision}). However, i have to call pdfLaTeX 3 or 4 times for the table to appear finally properly. Is this normal ? Is there a workaround ?
• I found that it works better with tabularray. However, i have an error. Somehow, the parameter \nt@revision is not passed properly. I do not understand what is happening ?
• Is there something i missed, a better solution to do what i want to do ?

Thanks in advance for your help.

Answer 1

You would have to tell tblr to expand \nt@revision:

\begin{tblr}[expand=\nt@revision]{
    colspec = {|l|X|},
    rowspec={Q[m]Q[m]Q[m]Q[m]Q[m]Q[m]Q[m]Q[m]Q[m]Q[m]},
    rowsep = 3pt,
    width = \textwidth,
    }
    \hline
    \SetCell{bg=softgray}\textbf{Company} & \SetCell{bg=softgray}\textbf{Name} \\ \hline
    \nt@revision
\end{tblr}