modules/output: refactor wrapRc default

Set default to `true`, with a low priority. Home-manager's wrapper sets
its own default using `mkOptionDefault`.

Clarify using `defaultText`.

modules/top-level/output.nix

@@ -46,8 +46,14 @@ in
 
     wrapRc = mkOption {
       type = types.bool;
-      description = "Should the config be included in the wrapper script.";
+      description = ''
-      default = false;
+        Whether the config will be included in the wrapper script.
+
+        When enabled, the nixvim config will be passed to `nvim` using the `-u` option.
+      '';
+      defaultText = lib.literalMD ''
+        Configured by your installation method: `false` when using the home-manager module, `true` otherwise.
+      '';
     };
 
     finalPackage = mkOption {
@@ -284,20 +290,24 @@ in
         '';
       };
 
-      extraConfigLuaPre = lib.mkOrder 100 (
+      # Set `wrapRc`s option default with even lower priority than `mkOptionDefault`
-        # Add a global table at start of init
+      wrapRc = lib.mkOverride 1501 true;
-        ''
-          -- Nixvim's internal module table
-          -- Can be used to share code throughout init.lua
-          local _M = {}
-        ''
-        + lib.optionalString config.wrapRc ''
 
+      extraConfigLuaPre = lib.mkOrder 100 (
+        lib.concatStringsSep "\n" (
+          lib.optional config.wrapRc ''
             -- Ignore the user lua configuration
             vim.opt.runtimepath:remove(vim.fn.stdpath('config'))              -- ~/.config/nvim
             vim.opt.runtimepath:remove(vim.fn.stdpath('config') .. "/after")  -- ~/.config/nvim/after
             vim.opt.runtimepath:remove(vim.fn.stdpath('data') .. "/site")     -- ~/.local/share/nvim/site
           ''
+          # Add a global table at start of init
+          ++ lib.singleton ''
+            -- Nixvim's internal module table
+            -- Can be used to share code throughout init.lua
+            local _M = {}
+          ''
+        )
       );
 
       extraPlugins = lib.mkIf config.wrapRc [ config.filesPlugin ];

wrappers/hm.nix

@@ -22,6 +22,13 @@ let
     };
     modules = [
       ./modules/hm.nix
+      # FIXME: this can't go in ./modules/hm.nix because we eval that module in the docs _without_ nixvim's modules
+      {
+        _file = ./hm.nix;
+        config = {
+          wrapRc = lib.mkOptionDefault false;
+        };
+      }
     ];
     check = false;
   };

wrappers/modules/darwin.nix

@@ -1,8 +1,3 @@
-{ lib, ... }:
 {
   imports = [ ./enable.nix ];
-
-  config = {
-    wrapRc = lib.mkForce true;
-  };
 }

wrappers/modules/nixos.nix

@@ -5,8 +5,4 @@
   };
 
   imports = [ ./enable.nix ];
-
-  config = {
-    wrapRc = lib.mkForce true;
-  };
 }

wrappers/modules/standalone.nix

@@ -1,6 +0,0 @@
-{ lib, ... }:
-{
-  config = {
-    wrapRc = lib.mkForce true;
-  };
-}

wrappers/standalone.nix

@@ -18,7 +18,6 @@ let
       nixvimConfig = evalNixvim {
         modules = [
           mod
-          ./modules/standalone.nix
         ];
         extraSpecialArgs = {
           defaultPkgs = pkgs;