wrappers/standalone: make pkgs arg optional, allow specifying system

Author: MattSturgeon

flake-modules/wrappers.nix

@@ -1,10 +1,18 @@
-{ inputs, self, ... }:
+{
+  inputs,
+  self,
+  lib,
+  ...
+}:
 {
   perSystem =
     { system, pkgs, ... }:
     {
       _module.args = {
-        makeNixvimWithModule = import ../wrappers/standalone.nix pkgs self;
+        makeNixvimWithModule = import ../wrappers/standalone.nix {
+          inherit lib self;
+          defaultSystem = system;
+        };
       };
 
       checks =

templates/simple/flake.nix

@@ -18,12 +18,12 @@
       ];
 
       perSystem =
-        { pkgs, system, ... }:
+        { system, ... }:
         let
           nixvimLib = nixvim.lib.${system};
           nixvim' = nixvim.legacyPackages.${system};
           nixvimModule = {
-            inherit pkgs;
+            inherit system; # or alternatively, set `pkgs`
             module = import ./config; # import the module directly
             # You can use `extraSpecialArgs` to pass additional arguments to your module files
             extraSpecialArgs = {

wrappers/standalone.nix

@@ -1,8 +1,13 @@
-default_pkgs: self:
+{
+  self,
+  lib,
+  defaultSystem,
+}:
 {
   # TODO: Deprecate this arg in favour of using module options
-  pkgs ? default_pkgs,
-  lib ? pkgs.lib,
+  pkgs ? null,
+  # NOTE: `defaultSystem` is the only reason this function can't go in `<nixvim>.lib`
+  system ? defaultSystem,
   extraSpecialArgs ? { },
   _nixvimTests ? false,
   module,
@@ -12,23 +17,32 @@ let
   helpers = self.lib.nixvim.override { inherit _nixvimTests; };
   inherit (helpers.modules) evalNixvim;
 
+  systemMod =
+    if pkgs == null then
+      {
+        _file = ./standalone.nix;
+        nixpkgs.hostPlatform = lib.mkDefault { inherit system; };
+      }
+    else
+      {
+        _file = ./standalone.nix;
+        nixpkgs.pkgs = lib.mkDefault pkgs;
+      };
+
   mkNvim =
     mod:
     let
       nixvimConfig = evalNixvim {
         modules = [
           mod
-          # TODO: only include this when `args?pkgs`:
-          {
-            _file = ./standalone.nix;
-            nixpkgs.pkgs = lib.mkDefault pkgs;
-          }
+          systemMod
         ];
         inherit extraSpecialArgs;
       };
       inherit (nixvimConfig.config) enableMan build;
+      inherit (nixvimConfig._module.args.pkgs) symlinkJoin;
     in
-    (pkgs.symlinkJoin {
+    (symlinkJoin {
       name = "nixvim";
       paths = [
         build.package