feat(neovim): add snippets, autopairs and surround

home/emmatherock/neovim.nix

@@ -87,14 +87,55 @@
       enable = true;
       settings.sources = [
         { name = "nvim_lsp"; }
+        { name = "luasnip"; }
         { name = "path"; }
         { name = "buffer"; }
       ];
+      settings.snippet.expand = ''
+        function(args)
+          require("luasnip").lsp_expand(args.body)
+        end
+      '';
+      settings.mapping = {
+        "<Tab>" = ''
+          cmp.mapping(function(fallback)
+            if cmp.visible() then
+              cmp.select_next_item()
+            elseif require("luasnip").expand_or_jumpable() then
+              require("luasnip").expand_or_jump()
+            else
+              fallback()
+            end
+          end, { "i", "s" })
+        '';
+        "<S-Tab>" = ''
+          cmp.mapping(function(fallback)
+            if cmp.visible() then
+              cmp.select_prev_item()
+            elseif require("luasnip").jumpable(-1) then
+              require("luasnip").jump(-1)
+            else
+              fallback()
+            end
+          end, { "i", "s" })
+        '';
+      };
     };
     plugins.cmp-nvim-lsp.enable = true;
+    plugins.cmp_luasnip.enable = true;
     plugins.cmp-path.enable = true;
     plugins.cmp-buffer.enable = true;
 
+    # --- Snippets ---
+    plugins.luasnip = {
+      enable = true;
+      fromVscode = [ { paths = "${pkgs.vimPlugins.friendly-snippets}"; } ];
+    };
+
+    # --- Pairs and surrounding text ---
+    plugins.nvim-autopairs.enable = true;
+    plugins.nvim-surround.enable = true;
+
     # --- Format on save ---
     plugins.conform-nvim = {
       enable = true;