Added nvim-cmp

config/default.nix

@@ -2,6 +2,7 @@
   # Import all your configuration modules here
   # imports = [./bufferline.nix];
   imports = [
+    ./plugins/cmp.nix
     ./plugins/gitsigns.nix
     ./plugins/lsp.nix
     ./plugins/lualine.nix

config/plugins/cmp.nix

@@ -0,0 +1,31 @@
+{
+  plugins.cmp = {
+    enable = true;
+    settings = {
+      mapping = {
+        "<C-p>" = "cmp.mapping.scroll_docs(-4)";
+        "<C-n>" = "cmp.mapping.scroll_docs(4)";
+        "<C-Space>" = "cmp.mapping.complete()";
+        "<C-e>" = "cmp.mapping.abort()";
+        # Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+        "<CR>" = "cmp.mapping.confirm({ select = true })";
+      };
+
+      snippet.expand = ''
+        function(args)
+          require('luasnip').lsp_expand(args.body)
+        end
+      '';
+
+      sources = [
+        {name = "buffer";}
+        {name = "cmdline";}
+        {name = "luasnip";}
+        {name = "nvim_lsp";}
+        {name = "path";}
+      ];
+    };
+  };
+
+  plugins.luasnip.enable = true;
+}