feat(docs): control whether to link modules definition to git repository

docs/docgen.nix

@@ -9,6 +9,7 @@
 
     "^docs/.*"
   ],
+  linkToRepo ? false,
 }:
 
 stdenvNoCC.mkDerivation {
@@ -79,6 +80,25 @@ stdenvNoCC.mkDerivation {
             moduleOptionsDoc =
               (nixosOptionsDoc {
                 options = lib.removeAttrs modulesEval.options [ "_module" ];
+                transformOptions =
+                  opt:
+                  opt
+                  // {
+                    declarations = map (
+                      decl:
+                      let
+                        file = toString decl;
+                      in
+                      {
+                        name = relPath file;
+                        url =
+                          if linkToRepo then
+                            "https://git.shellgod.icu/Sk7Str1p3/nixos/src/branch/main/${relPath file}"
+                          else
+                            "file://${decl}";
+                      }
+                    ) opt.declarations;
+                  };
               }).optionsCommonMark;
           in
           {