plugins/nixd: Adapt to new options

Note that due to the structure of the code we can't introduce
deprecation warnings, it results in:

  cannot find attribute `plugins.lsp.servers.nixd.settings.XXX`

plugins/lsp/language-servers/default.nix

@@ -4,11 +4,13 @@
   config,
   pkgs,
   ...
-}:
+}@args:
 with lib;
 let
   lspHelpers = import ../helpers.nix { inherit lib config pkgs; };
 
+  nixdSettings = import ./nixd.nix args;
+
   servers = [
     {
       name = "ansiblels";
@@ -408,6 +410,7 @@ let
       description = "nixd for Nix";
       package = pkgs.nixd;
       settings = cfg: { nixd = cfg; };
+      settingsOptions = nixdSettings.options;
     }
     {
       name = "nushell";
@@ -660,10 +663,11 @@ in
   imports = lib.lists.map lspHelpers.mkLsp servers ++ [
     ./ccls.nix
     ./efmls-configs.nix
-    ./nixd.nix
     ./pylsp.nix
     ./rust-analyzer.nix
     ./svelte.nix
     ./vls.nix
   ];
+
+  config = lib.mkMerge [ nixdSettings.config ];
 }

plugins/lsp/language-servers/nixd.nix

@@ -10,52 +10,52 @@ let
   cfg = config.plugins.lsp.servers.nixd;
 in
 {
-  # Options: https://github.com/nix-community/nixd/blob/main/docs/user-guide.md#configuration
+  # Options:
-  options.plugins.lsp.servers.nixd.settings = {
+  #  - https://github.com/nix-community/nixd/blob/main/nixd/docs/configuration.md
-    # The evaluation section, provide auto completion for dynamic bindings.
+  #  - https://github.com/nix-community/nixd/blob/main/nixd/include/nixd/Controller/Configuration.h
-    eval = {
+  options = {
-      target = {
-        args = helpers.defaultNullOpts.mkNullable (with types; listOf str) "[]" ''
-          Accept args as "nix eval".
-        '';
-
-        installable = helpers.defaultNullOpts.mkStr "" ''
-          "nix eval"
-        '';
-      };
-
-      depth = helpers.defaultNullOpts.mkInt 0 "Extra depth for evaluation";
-
-      workers = helpers.defaultNullOpts.mkInt 3 "The number of workers for evaluation task.";
-    };
-
     formatting = {
-      command = helpers.defaultNullOpts.mkStr "nixpkgs-fmt" ''
+      command = helpers.defaultNullOpts.mkListOf types.str ''[ "nixpkgs-fmt" ]'' ''
         Which command you would like to do formatting.
-        Explicitly set to `"nixpkgs-fmt"` will automatically add `pkgs.nixpkgs-fmt` to the nixvim
+        Explicitly set to `["nixpkgs-fmt"]` will automatically add `pkgs.nixpkgs-fmt` to the nixvim
         environment.
       '';
     };
 
-    options = {
+    options =
-      enable = helpers.defaultNullOpts.mkBool true ''
+      let
-        Enable option completion task.
+        provider = types.submodule {
-        If you are writing a package, disable this
+          options = {
+            expr = mkOption {
+              type = types.str;
+              description = "Expression to eval. Select this attrset as eval .options";
+            };
+          };
+        };
+      in
+      helpers.mkNullOrOption (with helpers.nixvimTypes; attrsOf (maybeRaw provider)) ''
+        Tell the language server your desired option set, for completion.
+        This is lazily evaluated.
       '';
 
-      target = {
+    nixpkgs =
-        args = helpers.defaultNullOpts.mkNullable (with types; listOf str) "[]" ''
+      let
-          Accept args as "nix eval".
+        provider = types.submodule {
-        '';
+          options = {
-
+            expr = mkOption {
-        installable = helpers.defaultNullOpts.mkStr "" ''
+              type = types.str;
-          "nix eval"
+              description = "Expression to eval. Treat it as `import <nixpkgs> { }`";
-        '';
+            };
-      };
+          };
-    };
+        };
+      in
+      helpers.mkNullOrOption (helpers.nixvimTypes.maybeRaw provider) ''
+        This expression will be interpreted as "nixpkgs" toplevel
+        Nixd provides package, lib completion/information from it.
+      '';
   };
 
   config = mkIf cfg.enable {
-    extraPackages = optional (cfg.settings.formatting.command == "nixpkgs-fmt") pkgs.nixpkgs-fmt;
+    extraPackages = optional (cfg.settings.formatting.command == [ "nixpkgs-fmt" ]) pkgs.nixpkgs-fmt;
   };
 }

tests/test-sources/plugins/lsp/language-servers/nixd.nix

@@ -7,30 +7,22 @@
         enable = true;
 
         settings = {
-          eval = {
+          nixpkgs.expr = ''
-            target = {
+            import (builtins.getFlake "/home/lyc/workspace/CS/OS/NixOS/flakes").inputs.nixpkgs { }
-              args = [
+          '';
-                "foo"
+
-                "bar"
-              ];
-              installable = "";
-            };
-            depth = 0;
-            workers = 3;
-          };
           formatting = {
-            command = "nixpkgs-fmt";
+            command = [ "nixpkgs-fmt" ];
           };
+
           options = {
-            enable = true;
+            nixos.expr = ''
-            target = {
+              (builtins.getFlake "/home/lyc/flakes").nixosConfigurations.adrastea.options
-              args = [
+            '';
-                "yes"
+
-                "no"
+            home-manager.expr = ''
-                "maybe"
+              (builtins.getFlake "/home/lyc/flakes").homeConfigurations."lyc@adrastea".options
-              ];
+            '';
-              installable = "";
-            };
           };
         };
       };