Using minted in subfiles in a subdirectory

Question

The answer here gives a MWE that shows how to make \inputminted work in a subfile. However, the approach does not work for \begin{minted}. For the following setup

main.tex:

\documentclass{article}
\usepackage{minted}
\usepackage{subfiles}
\begin{document}
\subfile{sub/sub}
\end{document}

sub/sub.tex

\documentclass[../main]{subfiles}
\begin{document}
\begin{minted}{python}
print("Hello2 world")
\end{minted}
\end{document}

building sub/sub.tex in isolation (via overleaf) results in the error:

(./_minted-output/default-pyg-prefix.pygstyle) (./_minted-output/default.pygsty
le)
runsystem(pygmentize -l python -f latex -P commandprefix=PYG -F tokenmerge -o _
minted-output/ED80FDFC2E78B411DE97C895BDF46CCE50EF3049E275D339AF879205FC52C1A0.
pygtex output.pyg)...executed.
! Package minted Error: Missing Pygments output; \inputminted was
probably given a file that does not exist--otherwise, you may need 
the outputdir package option, or may be using an incompatible build tool,
or may be using frozencache with a missing file.
See the minted package documentation for explanation.
Type  H <return>  for immediate help.
 ...
l.5 \end{minted}
This could be caused by using -output-directory or -aux-directory 
without setting minted's outputdir, or by using a build tool that 
changes paths in ways minted cannot detect, 
or using frozencache with a missing file.

Building main.tex seems to work fine in the MWE.

How can I make building sub/sub.tex work too?

Answer 1

Try this:

% main.tex
\documentclass{article}
\usepackage{minted}
\usepackage{subfiles}
\usepackage{xpatch}
\makeatletter
% fix for first kind
\xpatchcmd\inputminted
  {\minted@pygmentize[#3]{#2}}
  {\minted@pygmentize[\import@path #3]{#2}}
  {}{\fail}
\makeatother
\begin{document}
\subfile{sub/sub}
\end{document}

% sub/sub.tex
\documentclass[../main]{subfiles}
\begin{document}
\begin{minted}{python}
print("Hello2 world")
\end{minted}

\inputminted{python}{./pythonfile.py} % a dummy python file located in sub/pythonfile.py
\end{document}