How to set Overleaf to compile with `lualatex --shell-escape `?

Question

I'm trying to use the solution given by the accepted answer in

How to have \psframe working with LuaLatex?

but I don't know how to enable the option --shell-escape there.

Overleaf explains that it has a configuration file called latexmk, but I don't understand a single line of it:

https://www.overleaf.com/help/216-how-does-overleaf-compile-my-project

I'm sorry if this is considered a technical support question. If I don't find a fast answer here, I'm going to contact Overleaf, but maybe this question helps somebody else here someday.

As the blog post in @Benjamin's answer says, latexmkrc and --shell-escape are allowed on Overleaf. Each Overleaf project is a Docker container (https://www.digital-science.com/blog/tech/intro-to-docker-and-how-we-use-it-at-overleaf/), so each project's settings and tricks stays within its own container. — imnothere, Feb 06 '16 at 07:48
Special case of editors - How can I enable shell-escape? - TeX - LaTeX Stack Exchange. — user202729, Aug 07 '22 at 16:11

score 8 · Accepted Answer · answered Feb 05 '16 at 23:05

According to this blog post, it should be possible to upload a latexmkrc file to your project and surprisingly even shell-escape seems to be allowed. I haven't tested it, but something like this should work:

$pdflatex = 'lualatex %O %S --shell-escape';
$pdf_mode = 1;
$postscript_mode = $dvi_mode = 0;

How to set Overleaf to compile with `lualatex --shell-escape `?

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