neovim: refac extra filetype detect

neovim/dev.nix

@@ -4,6 +4,14 @@ let
   inherit (lib.mod) ctrl;
   inherit (lib.nix2lua) lambda0 set pipe1 require call call0;
 
+  mkFiletypeDetect = ft: pattern: {
+    "filetype-detect-${ft}" = {
+      event = [ "BufNewFile" "BufRead" ];
+      inherit pattern;
+      command = "setfiletype ${ft}";
+    };
+  };
+
   mkLineLimiterGroup = { limit, pattern }: {
     "line-limiter-${toString limit}" = {
       event = [ "BufNewFile" "BufRead" ];
@@ -17,19 +25,14 @@ in
     "${modulesPath}/profiles/recommended.nix"
   ];
 
-  vim.namedCmd.extra-ftdetect = ''
-    aug extra_ftdetect
-      au!
-      au BufNewFile,BufRead *.d2 setfiletype d2
-      au BufNewFile,BufRead *.ncl setfiletype nickel
-      au BufNewFile,BufRead *.psql setfiletype psql
-    aug END
-  '';
-
   # Enable fast navigation between windows
   vim.keymap.set = map (k: { mode = "n"; lhs = ctrl k; rhs = "${ctrl "w"}${k}"; }) [ "h" "l" "j" "k" ];
 
   vim.augroup = lib.mkMerge [
+    (mkFiletypeDetect "d2" "*.d2")
+    (mkFiletypeDetect "nickel" "*.ncl")
+    (mkFiletypeDetect "psql" "*.psql")
+
     (mkLineLimiterGroup {
       limit = 101;
       pattern = [
@@ -128,16 +131,12 @@ in
       init_options = {
         typescript.tsdk = "./node_modules/typescript/lib";
       };
-
     };
-
     ltex = {
       language = "en-US";
       languageToolHttpServerUri = "http://localhost:8081";
     };
-
     pylsp = { };
-
     denols = {
       root_dir = call "${config.plugin.nvim-lspconfig.varName}.util.root_pattern" [ "deno.json" "deno.jsonc" ];
     };