modules/performance: add combinePlugins.standalonePlugins option

modules/performance.nix

@@ -10,7 +10,8 @@ in
           Whether to enable EXPERIMENTAL option to combine all plugins
           into a single plugin pack. It can significantly reduce startup time,
           but all your plugins must have unique filenames and doc tags.
-          Any collision will result in a build failure.
+          Any collision will result in a build failure. To avoid collisions
+          you can add your plugin to the `standalonePlugins` option.
           Only standard neovim runtime directories are linked to the combined plugin.
           If some of your plugins contain important files outside of standard
           directories, add these paths to `pathsToLink` option.
@@ -22,6 +23,12 @@ in
         example = [ "/data" ];
         description = "List of paths to link into a combined plugin pack.";
       };
+      standalonePlugins = lib.mkOption {
+        type = with types; listOf (either str package);
+        default = [ ];
+        example = [ "nvim-treesitter" ];
+        description = "List of plugins (names or packages) to exclude from plugin pack.";
+      };
     };
   };
 

modules/top-level/output.nix

@@ -98,13 +98,26 @@ in
         in
         lib.unique (builtins.concatMap pluginWithItsDeps normalizedPlugins);
 
+      # Remove dependencies from all plugins in a list
+      removeDependencies = ps: map (p: p // { plugin = removeAttrs p.plugin [ "dependencies" ]; }) ps;
+
       # Separated start and opt plugins
       partitionedPlugins = builtins.partition (p: p.optional) allPlugins;
       startPlugins = partitionedPlugins.wrong;
       # Remove opt plugin dependencies since they are already available in start plugins
-      optPlugins = map (
-        p: p // { plugin = builtins.removeAttrs p.plugin [ "dependencies" ]; }
-      ) partitionedPlugins.right;
+      optPlugins = removeDependencies partitionedPlugins.right;
+
+      # Test if plugin shouldn't be included in plugin pack
+      isStandalone =
+        p:
+        builtins.elem p.plugin config.performance.combinePlugins.standalonePlugins
+        || builtins.elem (lib.getName p.plugin) config.performance.combinePlugins.standalonePlugins;
+
+      # Separated standalone and combined start plugins
+      partitionedStartPlugins = builtins.partition isStandalone startPlugins;
+      toCombinePlugins = partitionedStartPlugins.wrong;
+      # Remove standalone plugin dependencies since they are already available in start plugins
+      standaloneStartPlugins = removeDependencies partitionedStartPlugins.right;
 
       # Combine start plugins into a single pack
       pluginPack =
@@ -121,12 +134,12 @@ in
                 ]
               );
             })
-          ) startPlugins;
+          ) toCombinePlugins;
 
           # Python3 dependencies
           python3Dependencies =
             let
-              deps = map (p: p.plugin.python3Dependencies or (_: [ ])) startPlugins;
+              deps = map (p: p.plugin.python3Dependencies or (_: [ ])) toCombinePlugins;
             in
             ps: builtins.concatMap (f: f ps) deps;
 
@@ -149,7 +162,7 @@ in
 
           # Combined plugin configs
           combinedConfig = builtins.concatStringsSep "\n" (
-            builtins.concatMap (x: lib.optional (x.config != null && x.config != "") x.config) startPlugins
+            builtins.concatMap (x: lib.optional (x.config != null && x.config != "") x.config) toCombinePlugins
           );
         in
         normalize {
@@ -158,7 +171,7 @@ in
         };
 
       # Combined plugins
-      combinedPlugins = [ pluginPack ] ++ optPlugins;
+      combinedPlugins = [ pluginPack ] ++ standaloneStartPlugins ++ optPlugins;
 
       # Plugins to use in finalPackage
       plugins = if config.performance.combinePlugins.enable then combinedPlugins else normalizedPlugins;

tests/test-sources/modules/performance/combine-plugins.nix

@@ -233,4 +233,70 @@ in
         }
       ];
     };
+
+  # Test that standalonePlugins option works
+  standalone-plugins.module =
+    { config, ... }:
+    {
+      performance.combinePlugins = {
+        enable = true;
+        standalonePlugins = with pkgs.vimPlugins; [
+          # By plugin name
+          "nvim-treesitter"
+          # By package itself
+          nvim-lspconfig
+          # Its dependency, plenary-nvim, not in this list, so will be combined
+          telescope-nvim
+          # Dependency of other plugin
+          "nvim-cmp"
+        ];
+      };
+      extraPlugins = with pkgs.vimPlugins; [
+        nvim-treesitter
+        nvim-lspconfig
+        telescope-nvim
+        # Only its dependency (nvim-cmp) won't be combined, but not the plugin itself
+        cmp-dictionary
+        # More plugins
+        gitsigns-nvim
+        luasnip
+      ];
+      extraConfigLuaPost = ''
+        -- Plugins are loadable
+        require("nvim-treesitter")
+        require("lspconfig")
+        require("telescope")
+        require("plenary")
+        require("cmp_dictionary")
+        require("cmp")
+        require("gitsigns")
+        require("luasnip")
+
+        -- Verify if plugin is standalone or combined
+        local function is_standalone(name, dirname)
+          local paths = vim.api.nvim_get_runtime_file("lua/" .. name, true);
+          assert(#paths == 1, "more than one copy of " .. name .. " in runtime")
+          return paths[1]:match("^(.+)/lua/"):find(dirname or name, 1, true) ~= nil
+        end
+
+        -- Standalone plugins
+        assert(is_standalone("nvim-treesitter"), "nvim-treesitter is combined, expected standalone")
+        assert(is_standalone("lspconfig"), "nvim-lspconfig is combined, expected standalone")
+        assert(is_standalone("telescope"), "telescope-nvim is combined, expected standalone")
+        -- Add trailing slash to ensure that it doesn't match cmp_dictionary
+        assert(is_standalone("cmp/", "nvim-cmp"), "nvim-cmp is combined, expected standalone")
+        -- Combined plugins
+        assert(not is_standalone("plenary"), "plenary-nvim is standalone, expected combined")
+        assert(not is_standalone("cmp_dictionary", "cmp-dictionary"), "cmp-dictionary is standalone, expected combined")
+        assert(not is_standalone("gitsigns"), "gitsigns-nvim is standalone, expected combined")
+        assert(not is_standalone("luasnip"), "luasnip is standalone, expected combined")
+      '';
+      assertions = [
+        {
+          # plugin-pack, nvim-treesitter, nvim-lspconfig, telescope-nvim, nvim-cmp
+          assertion = pluginCount config.finalPackage "start" == 5;
+          message = "Wrong number of plugins in packpathDirs";
+        }
+      ];
+    };
 }