plugins/nonels/prettierd: add disableTsServerFormatting option to prettierd

Add a new option (and warning) to disable the typescript-language-server (ts_ls) formatting the same as for prettier.

plugins/by-name/none-ls/prettierd.nix

@@ -0,0 +1,45 @@
+{
+  lib,
+  config,
+  options,
+  ...
+}:
+let
+  cfg = config.plugins.none-ls.sources.formatting.prettierd;
+  ts-ls-cfg = config.plugins.lsp.servers.ts_ls;
+  opt = options.plugins.none-ls.sources.formatting.prettierd;
+  defaultPrio = (lib.mkOptionDefault null).priority;
+in
+{
+  options.plugins.none-ls.sources.formatting.prettierd = {
+    disableTsServerFormatter = lib.mkOption {
+      type = lib.types.bool;
+      description = ''
+        Disables the formatting capability of the `ts_ls` language server if it is enabled.
+      '';
+      default = false;
+      example = true;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    warnings =
+      lib.optional (opt.disableTsServerFormatter.highestPrio == defaultPrio && ts-ls-cfg.enable)
+        ''
+          You have enabled the `prettierd` formatter in none-ls.
+          You have also enabled the `ts_ls` language server which also brings a formatting feature.
+
+          - To disable the formatter built-in the `ts_ls` language server, set
+            `plugins.none-ls.sources.formatting.prettierd.disableTsServerFormatter` to `true`.
+          - Else, to silence this warning, explicitly set the option to `false`.
+        '';
+
+    plugins.lsp.servers.ts_ls =
+      lib.mkIf (cfg.enable && ts-ls-cfg.enable && cfg.disableTsServerFormatter)
+        {
+          onAttach.function = ''
+            client.server_capabilities.documentFormattingProvider = false
+          '';
+        };
+  };
+}

plugins/by-name/none-ls/sources.nix

@@ -5,7 +5,10 @@ let
 in
 {
   imports =
-    [ ./prettier.nix ]
+    [
+      ./prettier.nix
+      ./prettierd.nix
+    ]
     ++ (lib.flatten (
       lib.mapAttrsToList (category: (lib.map (mkSourcePlugin category))) noneLsBuiltins
     ));