feat(docs): Preprocess with mdbook-toc

docs/book.toml

@@ -4,3 +4,7 @@ language = "en"
 multilingual = false
 src = "src"
 title = "Jalil's NixOS configuration module"
+
+[preprocessor.toc]
+command = "mdbook-toc"
+renderer = ["html"]

docs/default.nix

@@ -35,6 +35,7 @@ in
       sed '/^\*Declared by:\*$/,/^$/d' <${nixos-markdown} >> src/nixos-options.md
     '';
 
+    nativeBuildInputs = [ pkgs.mdbook-toc ];
     buildPhase = "${pkgs.mdbook}/bin/mdbook build --dest-dir $out";
   };
 }

docs/src/configuration-overview.md

@@ -5,6 +5,8 @@ I use [NixOS](https://nixos.org) and
 system and user configuration respectively. You can see what options I have
 added to configure the system and user configuration in the next chapters.
 
+## Table of Contents
+
 <!-- toc -->
 
 ## How to Use

docs/src/home-options.md

@@ -8,4 +8,6 @@ Manual](https://nix-community.github.io/home-manager/) or search the available
 options through [home-manager option
 search](https://mipmip.github.io/home-manager-option-search/)
 
+## Table of Contents
+
 <!-- toc -->

docs/src/nixos-options.md

@@ -7,4 +7,6 @@ You might want to take a look at the [NixOS
 Manual](https://nixos.org/manual/nixos/stable/) or search the available options
 through [NixOS Options](https://search.nixos.org/options).
 
+## Table of Contents
+
 <!-- toc -->