how to set the document width according width of text

I would like my documents to be automatically sized to the width of the text they contain, that is the width of their longest line.

I have a directory of files of code (python scripts) and I’m generating a pdf image of each file (to include this in posters for teaching programming) using a shell script. These files are all varying in width.

I don’t really know much about latex document sizing but read on With pdflatex and the minted package, how do I eliminate whitespace and include entire document? that I can use {standalone} and [varwidth=4cm,border=2mm] which seems like it might be a step in the right direction… maybe.

That seems to get the height of the document to automatically be sized correctly… but the width is obviously 4cm. If I delete the varwidth=4cm the pdf that gets produced is useless (line breaks are lost, all text is on a single line, document is enormously wide).

Does latex LaTex provide any kind of smarter sizing options?

I could probably customize my shell script to do count the number of characters of the longest line of each file with the command wc -L filename and then multiplying that by X to get the cm value to provide to varwidth …but I’d much prefer to use a better LaTex option. Does one exist?