Problem, when loading minted after \tikzexternalize

Question

Yesterday I found my old thesis and found out that there is a new version of minted (2.0+) which somehow don't want to work with my old thesis since all the listings were not highlighted.

Unfortunately there is in my opinion a problem which depends on the location of the \tikzexternalize command. If this command is located before \usepackage{minted} my listings won't get highlighted at all. Putting \usepackage{minted} before the \tikzexternalize works though. Using the old \usepackage{minted1} also works fine. So it seems to be a problem with minted 2.0+ only.

Here is a MWE for the problem (see commented lines):

\documentclass[11pt,a4paper]{article}
\usepackage[T1]{fontenc}

\usepackage{pgf,tikz}
\usetikzlibrary{external}
\tikzset{external/system call={pdflatex --shell-escape -halt-on-error -interaction=batchmode -jobname "\image" "\texsource"}}

% Loading minted here and everything is fine
%\usepackage{minted}

\tikzexternalize

% Loading minted here will result in no highlighting
\usepackage{minted}

\begin{document}

\begin{tikzpicture}
    \draw (0,0) --(1,2) -- (2,3) -- (1,0);
\end{tikzpicture}

\begin{minted}[frame=none,fontsize=\small,linenos=true]{c}
int main(int argc, char*argv[])
{
    (void) printf("Hello World\n");

    return EXIT_SUCCESS;
}
\end{minted}

\end{document}

So my question: Is this behaviour normal or intended?

Some information about the setup I am using:

MikTeX version:   miktex-2.9.5721
Minted version:   2015/09/09 v2.1 Yet another Pygments shim for LaTeX
Python version:   Python 3.5.0
Pygments version: Pygments version 2.0.2, (c) 2006-2014 by Georg Brandl.

And for building my thesis I use (under windows 8)

pdflatex --shell-escape --enable-write18 mwe

Answer 1

I think I found a fix for the issue:

Simply exchange (in the minted.sty-file)

\ifcsname tikzexternalrealjob\endcsname
    \minted@drafttrue
    \minted@cachefalse
\else
\fi

with:

\ifcsname tikzifexternalizing\endcsname 
    % if \tikzexternalize is set before \usepackage{minted} this branch is used
    % the true branch of the \tikzifexternalizing will only be used if the tikz externalizing job is running at the moment
    \tikzifexternalizing{\minted@drafttrue\minted@cachefalse}{}
\else
    % else this old code will be used which will definitely work in all other cases (when \tikzexternalize is set after \usepackage{minted})
    \ifcsname tikzexternalrealjob\endcsname
        \minted@drafttrue
        \minted@cachefalse
    \else
    \fi
\fi

\tikzifexternalizing will only process the true-branch if the externalization job runs (according to the package documentation).

Maybe a fix can be achived by a more beautiful and more elegant coding, but it does the trick for me at the moment.