docs: migrate to feel-co/ndg

docs/default.nix

@@ -92,7 +92,7 @@
 
   # Generate the HTML manual pages
   html = pkgs.callPackage ./manual.nix {
-    inherit release;
+    inherit inputs release;
     inherit (nvimModuleDocs) optionsJSON;
   };
 in {

docs/manual.nix

@@ -1,114 +1,47 @@
 {
-  lib,
-  stdenvNoCC,
-  fetchzip,
-  runCommandLocal,
-  # build inputs
-  nixos-render-docs,
-  documentation-highlighter,
-  dart-sass,
+  inputs,
   path,
-  # nrd configuration
-  release,
+  stdenvNoCC,
+  runCommandNoCCLocal,
   optionsJSON,
+  release,
 } @ args: let
   manual-release = args.release or "unstable";
-
-  scss-reset = fetchzip {
-    url = "https://github.com/Frontend-Layers/scss-reset/archive/refs/tags/1.4.2.zip";
-    hash = "sha256-cif5Sx8Ca5vxdw/mNAgpulLH15TwmzyJFNM7JURpoaE=";
-  };
-
-  compileStylesheet = runCommandLocal "compile-nvf-stylesheet" {} ''
-    mkdir -p $out
-
-    tmpfile=$(mktemp -d)
-    trap "rm -r $tmpfile" EXIT
-
-    ln -s "${scss-reset}/build" "$tmpfile/scss-reset"
-
-    ${dart-sass}/bin/sass --load-path "$tmpfile" \
-      ${./static/style.scss} "$out/style.css"
-
-    echo "Generated styles"
-  '';
 in
-  stdenvNoCC.mkDerivation {
-    name = "nvf-manual";
-    src = builtins.path {
-      name = "nvf-manual-${manual-release}";
-      path = lib.sourceFilesBySuffices ./manual [".md" ".md.in"];
-    };
-
-    strictDependencies = true;
-    nativeBuildInputs = [nixos-render-docs];
-
-    postPatch = ''
-      ln -s ${optionsJSON}/share/doc/nixos/options.json ./config-options.json
-    '';
-
-    buildPhase = ''
-      dest="$out/share/doc/nvf"
-      mkdir -p "$(dirname "$dest")"
-      mkdir -p $dest/{highlightjs,script}
-
-      # Copy highlight scripts to /highlights in document root.
-      cp -vt $dest/highlightjs \
-        ${documentation-highlighter}/highlight.pack.js \
-        ${documentation-highlighter}/LICENSE \
-        ${documentation-highlighter}/mono-blue.css \
-        ${documentation-highlighter}/loader.js
-
-      # Copy anchor scripts to the script directory in document root.
-      cp -vt "$dest"/script \
-        ${./static/script}/anchor-min.js \
-        ${./static/script}/anchor-use.js \
-        ${./static/script}/search.js
-
-      substituteInPlace ./options.md \
-        --subst-var-by OPTIONS_JSON ./config-options.json
-
-      substituteInPlace ./manual.md \
-        --subst-var-by NVF_VERSION ${manual-release}
-
-      substituteInPlace ./hacking/additional-plugins.md \
-        --subst-var-by NVF_REPO "https://github.com/notashelf/nvf/blob/${manual-release}"
-
-      # Move compiled stylesheet
-      cp -vt $dest \
-        ${compileStylesheet}/style.css
-
-      # Move release notes
-      cp -vr ${./release-notes} release-notes
-
-      # Generate final manual from a set of parameters. Explanation of the CLI flags are
-      # as follows:
-      #
-      #  1. --manpage-urls will allow you to use manual pages as they are defined in
-      #  the nixpkgs documentation.
-      #  2. --revision is the project revision as it is defined in 'release.json' in the
-      #  repository root
-      #  3. --script will inject a given Javascript file into the resulting pages inside
-      #  the <script> tag.
-      #  4. --toc-depth will determine the depth of the initial Table of Contents while
-      #  --section-toc-depth will determine the depth of per-section Table of Contents
-      #  sections.
-      nixos-render-docs manual html \
-        --manpage-urls ${path + "/doc/manpage-urls.json"} \
-        --revision ${lib.trivial.revisionWithDefault manual-release} \
-        --stylesheet style.css \
-        --script highlightjs/highlight.pack.js \
-        --script highlightjs/loader.js \
-        --script script/anchor-use.js \
-        --script script/anchor-min.js \
-        --script script/search.js \
-        --toc-depth 1 \
-        --section-toc-depth 1 \
-        manual.md \
-        "$dest/index.xhtml"
-
-        # Hydra support. Probably not necessary.
-        mkdir -p $out/nix-support/
-        echo "doc manual $dest index.html" >> $out/nix-support/hydra-build-products
-    '';
-  }
+  runCommandNoCCLocal "nvf-docs-html" {
+    nativeBuildInputs = [
+      (inputs.ndg.packages.${stdenvNoCC.system}.ndg.overrideAttrs
+        {
+          # FIXME: the tests take too long to build
+          doCheck = false;
+        })
+    ];
+  } ''
+    mkdir -p $out/share/doc
+
+    # Copy the markdown sources to be processed by ndg. This is not
+    # strictly necessary, but allows us to modify the Markdown sources
+    # as we see fit.
+    cp -rvf ${./manual} ./manual
+
+    # Replace variables following the @VARIABLE@ style in the manual
+    # pages. This can be built into ndg at a later date.
+    substituteInPlace ./manual/index.md \
+      --subst-var-by NVF_VERSION ${manual-release}
+
+    # Generate the final manual from a set of parameters. This uses
+    # feel-co/ndg to render the web manual.
+    ndg html \
+      --jobs $NIX_BUILD_CORES --title "NVF" \
+      --module-options ${optionsJSON}/share/doc/nixos/options.json \
+      --manpage-urls ${path}/doc/manpage-urls.json \
+      --options-depth 3 \
+      --generate-search true \
+      --highlight-code true \
+      --input-dir ./manual \
+      --output-dir "$out/share/doc"
+
+    # Hydra support. Probably not necessary.
+    mkdir -p $out/nix-support/
+    echo "doc manual $dest index.html" >> $out/nix-support/hydra-build-products
+  ''

docs/manual/configuring.md

@@ -1,14 +1,15 @@
 # Configuring nvf {#ch-configuring}
 
 [helpful tips section]: #ch-helpful-tips
+[options reference]: /nvf/options.html
 
 nvf allows for _very_ extensive configuration in Neovim through the Nix module
 interface. The below chapters describe several of the options exposed in nvf for
 your convenience. You might also be interested in the [helpful tips section] for
 more advanced or unusual configuration options supported by nvf.
 
 Note that this section does not cover module _options_. For an overview of all
-module options provided by nvf, please visit the [appendix](/nvf/options.html)
+module options provided by nvf, please visit the [options reference]
 
 ```{=include=} chapters
 configuring/custom-package.md