several small updates

lua/plugins/formatter.lua

@@ -1,30 +1,38 @@
 return {
-  "stevearc/conform.nvim",
-  opts = {
-    -- https://github.com/stevearc/conform.nvim?tab=readme-ov-file#setup
-    notify_on_error = true,
-    formatters_by_ft = {
-      lua = { "stylua" },
-      typescript = { { "prettierd", "prettier" } },
-      typescriptreact = { { "prettierd", "prettier" } },
-      javascript = { { "prettierd", "prettier" } },
-      javascriptreact = { { "prettierd", "prettier" } },
-    },
-  },
-  keys = {
-    {
-      "<leader>l<leader>",
-      function()
-        require("conform").format({ async = true, lsp_fallback = true }, function(err, edited)
-          if edited then
-            print("Formatted!")
-          else
-            print("Nothing to format!")
-          end
-        end)
-      end,
-      mode = { "n", "v", "x" },
-      desc = "Format buffer",
-    },
-  },
+	"stevearc/conform.nvim",
+	opts = {
+		-- https://github.com/stevearc/conform.nvim?tab=readme-ov-file#setup
+		notify_on_error = true,
+    -- Note that all these need to be available at runtime, add them to flake.nix#runtimeDependencies
+		formatters_by_ft = {
+			lua = { "stylua" },
+      nix = { "nixfmt" },
+			typescript = { { "prettierd", "prettier" } },
+			typescriptreact = { { "prettierd", "prettier" } },
+			javascript = { { "prettierd", "prettier" } },
+			javascriptreact = { { "prettierd", "prettier" } },
+      -- TODO revisit these I'd like to use them but they are not in nixpkgs yet
+      -- https://nixos.org/guides/nix-pills/
+      -- markdown = { "mdslw", "mdsf"},
+      markdown = { "markdownlint-cli2" },
+		},
+	},
+	keys = {
+		{
+			"<leader>l<leader>",
+			function()
+				require("conform").format({ async = true, lsp_fallback = true }, function(err, edited)
+					if edited then
+						print("Formatted!")
+					elseif err then
+						print(err)
+					else
+						print("Nothing to format!")
+					end
+				end)
+			end,
+			mode = { "n", "v", "x" },
+			desc = "Format buffer",
+		},
+	},
 }