Is lib.cleanSourceWith the best way to get all markdown files in a directory?

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…or is there some more idiomatic way to do this?

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I’ve tried pkgs.lib.sourceByRegex /path [ "^.*\.md$" ], but it only seems to copy the top-level Markdown files in path to the /nix/store instead of all Markdown files in subdirectories.

Is this something I’ll have to write from scratch using readDir and company?

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You might want to have a look at GitHub - numtide/nix-filter: a small self-container source filtering lib.

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You might want to have a look at GitHub - numtide/nix-filter: a small self-contained source filtering lib

Thanks for the recommendation. AFAICT it looks like this behaves similarly to lib.sourceByRegex where it only includes the top-level Markdown files.

I left a comment on an open issue with nix-filter. Let’s see how that pans-out: Improve ergonomics for glob matching · Issue #9 · numtide/nix-filter · GitHub

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Are you looking for lib.sourceFilesBySuffices?

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Are you looking for lib.sourceFilesBySuffices ?

That’s recursive, but it includes a bunch of garbage empty directories in the output too.

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I reported the bug: lib.sourceFilesBySuffices creates empty directories · Issue #183110 · NixOS/nixpkgs · GitHub