🚀 go-pugleaf

This little bit of trickiness shoud do the desired file inclusion,
although the way it's called is a little weird.  You have to say

\verbatimfile{filename}
\end{verbatim}

I tried to make the \end{verbatim} implicit, but I couldn't manage to
do it.  Can someone more TeXnical than I tell me why (or better yet,
how to do it right)?  I know it has to do with the way TeX scans
arguments, and the way \verbatim is defined.

Anyway, here's the magic:

\newcommand{\beginverb}{\begin{verbatim}}
\newcommand{\inputfile}[1]{\input{#1}}
\newcommand{\verbatimfile}[1]{\expandafter\beginverb\inputfile{#1}}

Here's the explanation:

\expandafter is a TeX primitive that causes the second following macro
to be expanded before the first (that is, \expandafter\a\b means expand
\a after expanding \b).  Since \a has to be a single token, we define
a single-token alias for \begin{verbatim}.  The alias for
\input{filename} is required because \input is funny about it's
arguments, so \expandafter doesn't do the right thing.  So, the end
result is that \input{filename} is expanded before \begin{verbatim} is
expanded, so the file's contents are inserted inside the verbatim
environment.

joe