refactor: treesitter config

modules/programs/nvim/plugins/lua/nvim-treesitter.lua

@@ -1,10 +1 @@
-require("nvim-treesitter.configs").setup({
-  sync_install = false,
-  auto_install = false,
-  highlight = {
-    enable = true,
-  },
-  context_commentstring = {
-    enable = true,
-  },
-})
+require("nvim-treesitter.configs").setup()

modules/programs/nvim/plugins/treesitter.nix

@@ -6,22 +6,62 @@ with builtins;
     {
       plugin = nvim-treesitter;
       event = [ "BufReadPost" "BufNewFile" ];
+      opts = {
+        sync_install = false;
+        auto_install = false;
+        highlight = {
+          enable = true;
+        };
+        context_commentstring = {
+          enable = true;
+        };
+        textobjects =
+          {
+            select =
+              {
+                enable = true;
+
+                # Automatically jump forward to textobj, similar to targets.vim
+                lookahead = false;
+
+                keymaps = {
+                  # You can use the capture groups defined in textobjects.scm
+                  "af" = {
+                    query = "@function.outer";
+                    desc = "Select outer part of a function region";
+                  };
+                  "if" = {
+                    query = "@function.inner";
+                    desc = "Select inner part of a function region";
+                  };
+                  "ac" = {
+                    query = "@class.outer";
+                    desc = "Select outer part of a class region";
+                  };
+                  "ic" = {
+                    query = "@class.inner";
+                    desc = "Select inner part of a class region";
+                  };
+                };
+              };
+          };
+      };
       conf =
         let
-          parserDir = pkgs.symlinkJoin {
-            name = "tresitter-grammars-all";
-            paths = lib.attrValues (lib.filterAttrs (_: builtins.isAttrs) nvim-treesitter-parsers);
-          };
+          parserDir = pkgs.symlinkJoin
+            {
+              name = "tresitter-grammars-all";
+              paths = lib.attrValues (lib.filterAttrs (_: builtins.isAttrs) nvim-treesitter-parsers);
+            };
         in
-        readFile ./lua/nvim-treesitter.lua + ''
+        ''
           vim.opt.runtimepath:append("${parserDir}")
-
-          require'nvim-treesitter.configs'.setup {
-            parser_install_dir = "${parserDir}",
-          }
+          local final_opts = vim.tbl_deep_extend("keep", opts, { parser_install_dir = "${parserDir}" })
+          require('nvim-treesitter.configs').setup(final_opts)
         '';
       dependencies = [
         { plugin = nvim-ts-context-commentstring; }
+        { plugin = nvim-treesitter-textobjects; }
       ];
     }
     {