plugins/nonels: move to by-name

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

@@ -0,0 +1,43 @@
+{ lib, config, ... }:
+with lib;
+let
+  cfg = config.plugins.none-ls.sources.formatting.prettier;
+  ts-ls-cfg = config.plugins.lsp.servers.ts-ls;
+in
+{
+  options.plugins.none-ls.sources.formatting.prettier = {
+    disableTsServerFormatter = mkOption {
+      type = with types; nullOr bool;
+      description = ''
+        Disables the formatting capability of the `ts-ls` language server if it is enabled.
+      '';
+      default = null;
+      example = true;
+    };
+  };
+
+  config = mkIf cfg.enable {
+    warnings = optional ((cfg.disableTsServerFormatter == null) && ts-ls-cfg.enable) ''
+      You have enabled the `prettier` 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.prettier.disableTsServerFormatter` to `true`.
+      - Else, to silence this warning, explicitly set the option to `false`.
+    '';
+
+    plugins.lsp.servers.ts-ls =
+      mkIf
+        (
+          cfg.enable
+          && ts-ls-cfg.enable
+          && (isBool cfg.disableTsServerFormatter)
+          && cfg.disableTsServerFormatter
+        )
+        {
+          onAttach.function = ''
+            client.server_capabilities.documentFormattingProvider = false
+          '';
+        };
+  };
+}