flake-modules -> flake

flake/lib.nix

@@ -0,0 +1,39 @@
+{
+  self,
+  config,
+  lib,
+  withSystem,
+  ...
+}:
+{
+  # Expose lib as a flake-parts module arg
+  _module.args = {
+    helpers = self.lib.nixvim;
+  };
+
+  # Public `lib` flake output
+  flake.lib =
+    {
+      nixvim = lib.makeOverridable (import ../lib) {
+        inherit lib;
+        flake = self;
+      };
+      overlay = lib.makeOverridable (import ../lib/overlay.nix) {
+        flake = self;
+      };
+    }
+    // lib.genAttrs config.systems (
+      lib.flip withSystem (
+        { pkgs, system, ... }:
+        {
+          # NOTE: this is the publicly documented flake output we've had for a while
+          check = pkgs.callPackage ../lib/tests.nix {
+            inherit lib self system;
+          };
+
+          # NOTE: no longer needs to be per-system
+          helpers = lib.warn "nixvim: `<nixvim>.lib.${system}.helpers` has been moved to `<nixvim>.lib.nixvim` and no longer depends on a specific system" self.lib.nixvim;
+        }
+      )
+    );
+}