Rust Format On Save

config/options.nix

@@ -7,4 +7,5 @@
     # Save Undo History
     undofile = true;
   };
+  extraConfigLua = "vim.g.rustfmt_autosave = 1";
 }

config/plugins.nix

@@ -3,6 +3,10 @@
     lualine.enable = true;
     undotree.enable = true;
     bufferline.enable = true;
+    web-devicons.enable = true;
+
+    cmp-nvim-lsp.enable = true;
+    cmp-path.enable = true;
   };
   
   plugins.gitsigns = {
@@ -18,6 +22,71 @@
 	installRustc = false;
 	installCargo = false;
       };
+      nil_ls.enable = true;
+    };
+  };
+  plugins.treesitter = {
+    enable = true;
+    settings.highlight.enable = true;
+  };
+  plugins.friendly-snippets = {
+    enable = true;
+  };
+  plugins.luasnip = {
+    enable = true;
+    settings = {
+      enable_autosnippets = true;
+      store_selection_keys = "<Tab>";
+    };
+  };
+  plugins.cmp = {
+    enable = true;
+    settings = {
+      autoEnableSources = true;
+      snippet = { 
+        expand = ''
+          function(args)
+            require('luasnip').lsp_expand(args.body)
+          end
+        '';
+        };
+      sources = [
+        { name = "nvim_lsp"; }
+        {
+          name = "path"; # file system paths
+          keywordLength = 2	;
+        }
+        {
+          name = "luasnip"; # snippets
+          keywordLength = 2;
+        }
+      ];
+
+      mapping = {
+        "<Tab>" = "cmp.mapping(cmp.mapping.select_next_item(), {'i', 's'})";
+        "<C-j>" = "cmp.mapping.select_next_item()";
+        "<C-k>" = "cmp.mapping.select_prev_item()";
+        "<C-e>" = "cmp.mapping.abort()";
+        "<C-b>" = "cmp.mapping.scroll_docs(-4)";
+        "<C-f>" = "cmp.mapping.scroll_docs(4)";
+        "<C-Space>" = "cmp.mapping.complete()";
+        "<CR>" = "cmp.mapping.confirm({ select = true })";
+        "<S-CR>" = "cmp.mapping.confirm({ behavior = cmp.ConfirmBehavior.Replace, select = true })";
+        "<C-l>" = ''
+          cmp.mapping(function()
+            if luasnip.expand_or_locally_jumpable() then
+              luasnip.expand_or_jump()
+            end
+          end, { 'i', 's' })
+        '';
+        "<C-h>" = ''
+          cmp.mapping(function()
+            if luasnip.locally_jumpable(-1) then
+              luasnip.jump(-1)
+            end
+          end, { 'i', 's' })
+        '';
+      };
     };
   };