Using `minted` environment inside a `tabu` table

Question

I am trying to use a piece of highlighted code using the minted package inside a tabu table:

\documentclass{article}

\usepackage{minted}
\usepackage{longtable}
\usepackage{tabu}

\begin{document}       
    \begin{tabu*}{X[5,l]X[5,l]}
        \begin{minted}{matlab}
function out = op(x, y)
    out = x + y;
end
        \end{minted}
        & \\
    \end{tabu*}
\end{document}

With the above MWE I tried to place a minted environment inside a tabu cell analogously to what was done with the Verbatim environment explained within the tabu package documentation in section 1.3 "Inserting Verbatim material (fancyvrb)". However, by compiling the above MWE I get the following error message:

Enter file name: 
! Emergency stop.
<read *> 

l.15     \end{tabu*}
                    ^^J
*** (cannot \read from terminal in nonstop modes)

If I try to compile the document in scroll mode (-interaction=scrollmode with XeLaTeX from MiKTeX), I just get a command prompt with Enter file name:.

How can the minted environment be used within a tabu table?

Answer 1

This is more of a hack than a real fix. minted correctly creates the highlighted content, and the content is correctly brought in. But at some point, minted's \minted@pygmentize macro tries to \input a file that "doesn't exist." I put "doesn't exist" in quotes because I've tried minted with all file deletion disabled, and still get the error--so it seems to be related to tabu's multiple passes. Anyway, the Enter file name: can be avoided by patching tabu*. Basically, replace every \input with an \InputIfFileExists. Insert the following in the preamble, after tabu is loaded, and you document will compile.

\usepackage{etoolbox}
\let\originalinput\input
\newcommand{\newinput}[1]{\InputIfFileExists{#1}{}{}}
\AtBeginEnvironment{tabu*}{\let\input\newinput}