plugins/lsp: add svelte language server

plugins/lsp/language-servers/default.nix

@@ -465,6 +465,11 @@ with lib; let
       description = "Enable the sourcekit language server, for Swift and C/C++/Objective-C";
       package = pkgs.sourcekit-lsp;
     }
+    {
+      name = "svelte";
+      description = "Enable the svelte language server, for Svelte";
+      package = pkgs.nodePackages.svelte-language-server;
+    }
     {
       name = "tailwindcss";
       description = "Enable tailwindcss language server, for tailwindcss";
@@ -511,5 +516,6 @@ in {
     ++ [
       ./ccls.nix
       ./pylsp.nix
+      ./svelte.nix
     ];
 }

plugins/lsp/language-servers/svelte.nix

@@ -0,0 +1,293 @@
+{
+  lib,
+  config,
+  ...
+}:
+with lib; let
+  helpers = import ../../helpers.nix {inherit lib;};
+  cfg = config.plugins.lsp.servers.svelte;
+in {
+  # Options: https://github.com/sveltejs/language-tools/tree/master/packages/language-server#settings
+  options.plugins.lsp.servers.svelte.initOptions = {
+    svelte = {
+      plugin = {
+        typescript = {
+          enable = helpers.defaultNullOpts.mkBool true "Enable the TypeScript plugin.";
+
+          diagnostics = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable diagnostic messages for TypeScript.
+            '';
+          };
+
+          hover = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable hover info for TypeScript.
+            '';
+          };
+
+          documentSymbols = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable document symbols for TypeScript.
+            '';
+          };
+
+          completions = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable completions for TypeScript.
+            '';
+          };
+
+          codeActions = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable code actions for TypeScript.
+            '';
+          };
+
+          selectionRange = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable selection range for TypeScript.
+            '';
+          };
+
+          signatureHelp = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable signature help (parameter hints) for JS/TS.
+            '';
+          };
+
+          semanticTokens = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable semantic tokens (semantic highlight) for TypeScript.
+            '';
+          };
+        };
+
+        css = {
+          enable = helpers.defaultNullOpts.mkBool true "Enable the CSS plugin.";
+
+          globals = helpers.mkNullOrOption types.str ''
+            Which css files should be checked for global variables (`--global-var: value;`).
+            These variables are added to the css completions.
+            String of comma-separated file paths or globs relative to workspace root.
+          '';
+
+          diagnostics = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable diagnostic messages for CSS.
+            '';
+          };
+
+          hover = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable hover info for CSS.
+            '';
+          };
+
+          completions = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable completions for CSS.
+            '';
+
+            emmet = helpers.defaultNullOpts.mkBool true ''
+              Enable emmet auto completions for CSS.
+            '';
+          };
+
+          documentColors = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable document colors for CSS.
+            '';
+          };
+
+          colorPresentations = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable color picker for CSS.
+            '';
+          };
+
+          documentSymbols = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable document symbols for CSS.
+            '';
+          };
+
+          selectionRange = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable selection range for CSS.
+            '';
+          };
+        };
+
+        html = {
+          enable = helpers.defaultNullOpts.mkBool true "Enable the HTML plugin.";
+
+          hover = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable hover info for HTML.
+            '';
+          };
+
+          completions = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable completions for HTML.
+            '';
+
+            emmet = helpers.defaultNullOpts.mkBool true ''
+              Enable emmet auto completions for HTML.
+            '';
+          };
+
+          tagComplete = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable tag auto closing.
+            '';
+          };
+
+          documentSymbols = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable document symbols for HTML.
+            '';
+          };
+
+          linkedEditing = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable Linked Editing for HTML.
+            '';
+          };
+        };
+
+        svelte = {
+          enable = helpers.defaultNullOpts.mkBool true "Enable the Svelte plugin.";
+
+          diagnostics = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable diagnostic messages for Svelte.
+            '';
+          };
+
+          compilerWarnings = helpers.mkNullOrOption (with types; attrsOf str) ''
+            Svelte compiler warning codes to ignore or to treat as errors.
+            Example:
+            ```
+            {
+              css-unused-selector = "ignore";
+              unused-export-let = "error";
+            }
+          '';
+
+          format = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable formatting for Svelte (includes css & js) using `prettier-plugin-svelte`.
+
+              You can set some formatting options through this extension.
+              They will be ignored if there's any kind of configuration file, for example a
+              `.prettierrc` file.
+            '';
+
+            config = {
+              svelteSortOrder = helpers.defaultNullOpts.mkStr "options-scripts-markup-styles" ''
+                Format: join the keys `options`, `scripts`, `markup`, `styles` with a `-` in the
+                order you want.
+
+                This option is ignored if there's any kind of configuration file, for example a
+                `.prettierrc` file.
+              '';
+              svelteStrictMode = helpers.defaultNullOpts.mkBool false ''
+                More strict HTML syntax.
+
+                This option is ignored if there's any kind of configuration file, for example a
+                `.prettierrc` file.
+              '';
+
+              svelteAllowShorthand = helpers.defaultNullOpts.mkBool true ''
+                Option to enable/disable component attribute shorthand if attribute name and
+                expression are the same.
+
+                This option is ignored if there's any kind of configuration file, for example a
+                `.prettierrc` file.
+              '';
+
+              svelteBracketNewLine = helpers.defaultNullOpts.mkBool true ''
+                Put the `>` of a multiline element on a new line.
+
+                This option is ignored if there's any kind of configuration file, for example a
+                `.prettierrc` file.
+              '';
+
+              svelteIndentScriptAndStyle = helpers.defaultNullOpts.mkBool true ''
+                Whether or not to indent code inside `<script>` and `<style>` tags.
+
+                This option is ignored if there's any kind of configuration file, for example a
+                `.prettierrc` file.
+              '';
+
+              printWidth = helpers.defaultNullOpts.mkInt 80 ''
+                Maximum line width after which code is tried to be broken up.
+
+                This is a Prettier core option.
+                If you have the Prettier extension installed, this option is ignored and the
+                corresponding option of that extension is used instead.
+                This option is also ignored if there's any kind of configuration file, for example a
+                `.prettierrc` file.
+              '';
+
+              singleQuote = helpers.defaultNullOpts.mkBool false ''
+                Use single quotes instead of double quotes, where possible.
+
+                This is a Prettier core option.
+                If you have the Prettier extension installed, this option is ignored and the
+                corresponding option of that extension is used instead.
+                This option is also ignored if there's any kind of configuration file, for example a
+                `.prettierrc` file.
+              '';
+            };
+          };
+
+          hover = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable hover info for Svelte (for tags like `#if`/`#each`).
+            '';
+          };
+
+          completions = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable completions for TypeScript.
+              Enable autocompletion for Svelte (for tags like `#if`/`#each`).
+            '';
+          };
+
+          rename = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable rename/move Svelte files functionality.
+            '';
+          };
+
+          codeActions = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable code actions for Svelte.
+            '';
+          };
+
+          selectionRange = {
+            enable = helpers.defaultNullOpts.mkBool true ''
+              Enable selection range for Svelte.
+            '';
+          };
+
+          defaultScriptLanguage = helpers.mkNullOrOption types.str ''
+            The default language to use when generating new script tags in Svelte.
+          '';
+        };
+      };
+    };
+  };
+
+  config =
+    mkIf cfg.enable
+    {
+      plugins.lsp.servers.svelte.extraOptions.init_options = {
+        configuration = cfg.initOptions;
+      };
+    };
+}

tests/test-sources/plugins/lsp/nvim-lsp.nix

@@ -105,6 +105,7 @@
         ruff-lsp.enable = true;
         rust-analyzer.enable = true;
         sourcekit.enable = true;
+        svelte.enable = true;
         tailwindcss.enable = true;
         terraformls.enable = true;
         texlab.enable = true;

tests/test-sources/plugins/lsp/svelte.nix

@@ -0,0 +1,128 @@
+{
+  example = {
+    plugins.lsp = {
+      enable = true;
+
+      servers.svelte = {
+        enable = true;
+
+        initOptions = {
+          svelte = {
+            plugin = {
+              typescript = {
+                enable = true;
+                diagnostics = {
+                  enable = true;
+                };
+                hover = {
+                  enable = true;
+                };
+                documentSymbols = {
+                  enable = true;
+                };
+                completions = {
+                  enable = true;
+                };
+                codeActions = {
+                  enable = true;
+                };
+                selectionRange = {
+                  enable = true;
+                };
+                signatureHelp = {
+                  enable = true;
+                };
+                semanticTokens = {
+                  enable = true;
+                };
+              };
+              css = {
+                enable = true;
+                globals = null;
+                diagnostics = {
+                  enable = true;
+                };
+                hover = {
+                  enable = true;
+                };
+                completions = {
+                  enable = true;
+                  emmet = true;
+                };
+                documentColors = {
+                  enable = true;
+                };
+                colorPresentations = {
+                  enable = true;
+                };
+                documentSymbols = {
+                  enable = true;
+                };
+                selectionRange = {
+                  enable = true;
+                };
+              };
+              html = {
+                enable = true;
+                hover = {
+                  enable = true;
+                };
+                completions = {
+                  enable = true;
+                  emmet = true;
+                };
+                tagComplete = {
+                  enable = true;
+                };
+                documentSymbols = {
+                  enable = true;
+                };
+                linkedEditing = {
+                  enable = true;
+                };
+              };
+              svelte = {
+                enable = true;
+                diagnostics = {
+                  enable = true;
+                };
+                compilerWarnings = {
+                  css-unused-selector = "ignore";
+                  unused-export-let = "error";
+                };
+                format = {
+                  enable = true;
+                  config = {
+                    svelteSortOrder = "options-scripts-markup-styles";
+                    svelteStrictMode = false;
+                    svelteAllowShorthand = true;
+                    svelteBracketNewLine = true;
+                    svelteIndentScriptAndStyle = true;
+                    printWidth = 80;
+                    singleQuote = false;
+                  };
+                };
+                hover = {
+                  enable = true;
+                };
+                completions = {
+                  enable = true;
+                };
+                rename = {
+                  enable = true;
+                };
+                codeActions = {
+                  enable = true;
+                };
+                selectionRange = {
+                  enable = true;
+                };
+                defaultScriptLanguage = null;
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}