How to I use a longtabu inside \newenvironment?

Question

I have the following newenvironment defined using tabularx

\newenvironment{factlist}{%
    \newdimen\unbaseline
    \unbaseline=\dimexpr-\baselinestretch\baselineskip\relax
    \renewcommand\item[2]{%
    \textsc{##1} & {\raggedright ##2\smallskip\\}\\[\unbaseline]}
    \tabularx{\linewidth}{rX}}
    {\endtabularx}

I use it as follows:

\begin{factlist}
\item{A}{aaaa}
\item{B}{bbbb}
...
\item{Z}{zzzz}
\end{factlist}

Trouble is, the "factlist" does not split across pages. I believe this is because tabularx does not fit across pages.

I figured that "longtabu" from the "tabu" package has the same syntax as tabularx. However, I am not able to replace \tabularx and \endtabularx with \begin{longtabu} and \end{longtabu} in newenvironment. It throws a Runaway argument exception.

I am new to Latex. It would be nice if you could help me getting this code to work.

I am open to other methods as well, since all I want to do is BE ABLE TO SPLIT THE "FACTLIST" ACROSS PAGES!

Answer 1

It is almost always better to set these things as a list:

\documentclass{article}
\newenvironment{factlist}{%
\begin{enumerate}
\renewcommand\labelenumi{\textsc{\Alph{enumi}}}}
{\end{enumerate}}
\begin{document}

\begin{factlist}
\item One two three four five.
\item One two three four five.
\item One two three four five.
\item One two three four five.
\item One two three four five.
\item One two three four five.
\item One two three four five.
\item One two three four five.
\item One two three four five.
\item One two three four five.
\item One two three four five.
\item One two three four five.
\end{factlist}

\end{document}

the exact list parameters can be tuned to the exact requirements,