[neovim] add nvim-treesitter

nix/home/neovim/neovim.nix

@@ -68,6 +68,7 @@
       vim.opt.smartindent = true
 
       -- load plugins
+      -- neo-tree
       require("neo-tree").setup({
         filesystem = {
           filtered_items = {
@@ -82,6 +83,21 @@
       })
       require("neo-tree.sources.manager").show("filesystem")
 
+      -- nvim-treesitter
+      require("nvim-treesitter").setup({
+        build = ":TSUpdate",
+        config = function ()
+          local configs = require("nvim-treesitter.configs")
+          configs.setup({
+            ensure_installed = { "ansible", "css", "lua", "nix,", "yaml" },
+            sync_install = false,
+            highlight = { enable = true },
+            indent = { enable = true },
+          })
+        end
+      })
+
+
       -- function for new line
       _G.add_new_line = function()
         local n_lines = vim.api.nvim_buf_line_count(0)
@@ -115,6 +131,7 @@
     # plugins
     plugins = with pkgs.vimPlugins; [
       neo-tree-nvim
+      nvim-treesitter
     ];
   };
 }