docs: filter source by markdown

docs/default.nix

@@ -2,11 +2,17 @@
   inputs,
   pkgs,
   lib ? import ../lib/stdlib-extended.nix pkgs.lib inputs,
+  manpageUrls ? pkgs.path + "/doc/manpage-urls.json",
   ...
 }: let
   inherit (lib.modules) mkForce evalModules;
   inherit (lib.strings) hasPrefix removePrefix;
   inherit (lib.attrsets) isAttrs mapAttrs optionalAttrs recursiveUpdate isDerivation;
+  inherit (builtins) fromJSON readFile;
+
+  # release data
+  release-config = fromJSON (readFile ../release.json);
+  revision = release-config.release;
 
   # From home-manager:
   #
@@ -54,11 +60,14 @@
   buildOptionsDocs = args @ {
     modules,
     includeModuleSystemOptions ? true,
+    warningsAreErrors ? true,
     ...
   }: let
     inherit ((evalModules {inherit modules;})) options;
 
     # Declaration of the Github site URL.
+    # Takes a user, repo, and subpath, and returns a declaration site
+    # as a string.
     githubDeclaration = user: repo: subpath: let
       urlRef = "github.com";
       branch = "main";
@@ -68,10 +77,13 @@
     };
   in
     pkgs.buildPackages.nixosOptionsDoc ({
+        inherit warningsAreErrors;
+
         options =
           if includeModuleSystemOptions
           then options
           else builtins.removeAttrs options ["_module"];
+
         transformOptions = opt:
           recursiveUpdate opt {
             # Clean up declaration sites to not refer to the neovim-flakee
@@ -93,18 +105,16 @@
       // builtins.removeAttrs args ["modules" "includeModuleSystemOptions"]);
 
   nvimModuleDocs = buildOptionsDocs {
+    variablelistId = "neovim-flake-options";
+
     modules =
       import ../modules/modules.nix {
         inherit lib pkgs;
         check = false;
       }
       ++ [scrubbedPkgsModule];
-    variablelistId = "neovim-flake-options";
   };
 
-  release-config = builtins.fromJSON (builtins.readFile ../release.json);
-  revision = release-config.release;
-
   # Generate the `man home-configuration.nix` package
   nvf-configuration-manual =
     pkgs.runCommand "neovim-flake-reference-manpage" {
@@ -125,7 +135,7 @@
 
   # Generate the HTML manual pages
   neovim-flake-manual = pkgs.callPackage ./manual.nix {
-    inherit revision;
+    inherit revision manpageUrls;
     outputPath = "share/doc/neovim-flake";
     options = {
       neovim-flake = nvimModuleDocs.optionsJSON;

docs/manual.nix

@@ -1,16 +1,19 @@
 {
-  stdenv,
   lib,
-  documentation-highlighter,
-  revision,
-  outputPath ? "share/doc/neovim-flake",
-  options,
+  stdenvNoCC,
+  # build inputs
   nixos-render-docs,
+  documentation-highlighter,
+  # nrd configuration
+  manpageUrls,
+  revision,
+  options,
+  outputPath ? "share/doc/neovim-flake",
 }:
-stdenv.mkDerivation {
+stdenvNoCC.mkDerivation {
   name = "neovim-flake-manual";
   src = builtins.path {
-    path = ./manual;
+    path = lib.sourceFilesBySuffices ./manual [".md"];
     name = "neovim-flake-manual";
   };
 
@@ -43,7 +46,7 @@ stdenv.mkDerivation {
 
     # generate manual from
     nixos-render-docs manual html \
-      --manpage-urls ./manpage-urls.json \
+      --manpage-urls ${manpageUrls} \
       --revision ${lib.trivial.revisionWithDefault revision} \
       --stylesheet style.css \
       --script highlightjs/highlight.pack.js \

docs/manual/manpage-urls.json

@@ -1,3 +0,0 @@
-{
-	"nix.conf(5)": "https://nixos.org/manual/nix/stable/command-ref/conf-file.html"
-}