{ pkgs, lib, modules, ... }:
let
  options = lib.evalModules {
    modules = modules;
    specialArgs = { inherit pkgs lib; };
  };
  docs = pkgs.nixosOptionsDoc {
    # If we don't do this, we end up with _module.args on the generated options, which we do not want
    options = lib.filterAttrs (k: _: k != "_module") options.options;
    warningsAreErrors = false;
  };
  asciidoc = docs.optionsAsciiDoc;
in
pkgs.stdenv.mkDerivation {
  name = "nixvim-docs";

  src = asciidoc;
  buildInputs = [
    pkgs.asciidoctor
  ];

  phases = [ "buildPhase" ];

  buildPhase = ''
    mkdir -p $out/share/doc
    cat <<EOF > header.adoc
    = NixVim options
    This lists all the options available for NixVim.
    :toc:

    EOF
    cat header.adoc $src > tmp.adoc
    asciidoctor tmp.adoc -o $out/share/doc/index.html
  '';
}