modules/docs: add CONTRIBUTING page

Author: MattSturgeon

modules/docs/default.nix

@@ -1,4 +1,8 @@
-{ lib, ... }:
+{ lib, pkgs, ... }:
+let
+  # Convert links relative to github -> relative to docs
+  fixLinks = pkgs.callPackage ../../docs/fix-links { };
+in
 {
   options.enableMan = lib.mkOption {
     type = lib.types.bool;
@@ -16,8 +20,21 @@
     ./platforms.nix
   ];
 
-  config.docs.optionPages = {
-    docs = {
+  config.docs = {
+    pages."" = {
+      menu.section = "header";
+      menu.location = [ "Home" ];
+      source = pkgs.callPackage ./readme.nix {
+        inherit fixLinks;
+        # TODO: get `availableVersions` and `baseHref` from module options
+      };
+    };
+    pages.contributing = {
+      menu.section = "footer";
+      menu.location = [ "Contributing" ];
+      source = fixLinks ../../CONTRIBUTING.md;
+    };
+    optionPages.docs = {
       optionScopes = [ "docs" ];
       page.menu.location = [ "docs" ];
       page.text = ''

modules/docs/readme.nix

@@ -1,5 +1,6 @@
 {
   lib,
+  fixLinks,
   runCommand,
   availableVersions ? [ ],
   baseHref ? "/", # TODO: remove & get from module config
@@ -21,15 +22,11 @@ runCommand "index.md"
         {
           start = "<!-- START DOCS -->";
           end = "<!-- STOP DOCS -->";
-          baseurl = "https://nix-community.github.io/nixvim/";
-          src = ../../README.md;
+          src = fixLinks ../../README.md;
         }
         ''
           # extract relevant section of the README
           sed -n "/$start/,/$end/p" $src > $out
-          # replace absolute links
-          substituteInPlace $out --replace-quiet "$baseurl" "./"
-          # TODO: replace .html with .md
         '';
 
     docs_versions =