modules: refactor plugins code in top-level

modules/top-level/plugins/default.nix

@@ -0,0 +1,53 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+let
+  inherit (import ./utils.nix lib)
+    normalizedPluginType
+    normalizePlugins
+    ;
+  byteCompileCfg = config.performance.byteCompileLua;
+in
+{
+  options = {
+    build.plugins = lib.mkOption {
+      visible = false;
+      internal = true;
+      readOnly = true;
+      type = lib.types.listOf normalizedPluginType;
+      description = ''
+        Final list of (normalized) plugins that will be passed to the wrapper.
+
+        It notably implements:
+        - byte-compilation (performance.byteCompileLua) -> ./byte-compile-plugins.nix
+        - plugins combining (performance.combinePlugins) -> ./combine-plugins.nix
+      '';
+    };
+  };
+
+  config = {
+    build.plugins =
+      let
+        shouldCompilePlugins = byteCompileCfg.enable && byteCompileCfg.plugins;
+        byteCompilePlugins = import ./byte-compile-plugins.nix { inherit lib pkgs; };
+
+        shouldCombinePlugins = config.performance.combinePlugins.enable;
+        combinePlugins = import ./combine-plugins.nix {
+          inherit lib pkgs;
+          inherit (config.performance.combinePlugins)
+            standalonePlugins
+            pathsToLink
+            ;
+        };
+      in
+
+      lib.pipe config.extraPlugins (
+        [ normalizePlugins ]
+        ++ lib.optionals shouldCompilePlugins [ byteCompilePlugins ]
+        ++ lib.optionals shouldCombinePlugins [ combinePlugins ]
+      );
+  };
+}