Migrate ESLint config to flat config and update deps

.cspell.json

@@ -15,6 +15,7 @@
     "ruleset",
     "sarif",
     "tagname",
+    "tsparser",
     "vite",
     "VSIX",
     "ZIZMOR"

eslint.config.js

@@ -0,0 +1,89 @@
+const js = require("@eslint/js");
+const tseslint = require("@typescript-eslint/eslint-plugin");
+const tsparser = require("@typescript-eslint/parser");
+const prettier = require("eslint-config-prettier");
+const globals = require("globals");
+
+module.exports = [
+  {
+    ignores: [
+      "test/**",
+      "**/*.d.ts",
+      "out/**",
+      "htmlhint/out/**",
+      "htmlhint-server/out/**",
+      ".vscode-test/**",
+      "node_modules/**",
+      "htmlhint/node_modules/**",
+      "htmlhint-server/node_modules/**",
+      "htmlhint/vscode-htmlhint-*.vsix",
+      "**/*.vsix",
+    ],
+  },
+  js.configs.recommended,
+  {
+    files: ["**/*.ts"],
+    languageOptions: {
+      parser: tsparser,
+      parserOptions: {
+        ecmaVersion: "latest",
+        sourceType: "module",
+      },
+      globals: {
+        ...globals.node,
+        NodeJS: "readonly",
+      },
+    },
+    plugins: {
+      "@typescript-eslint": tseslint,
+    },
+    rules: {
+      ...tseslint.configs.recommended.rules,
+      "no-console": "error",
+      "no-empty": "off",
+      "no-var": "off",
+      "prefer-const": "off",
+      "@typescript-eslint/explicit-module-boundary-types": "off",
+      "@typescript-eslint/no-empty-interface": "off",
+      "@typescript-eslint/no-explicit-any": "off",
+      "@typescript-eslint/no-non-null-assertion": "off",
+      // Disable base no-unused-vars rule for TypeScript files to prevent conflicts
+      "no-unused-vars": "off",
+      "@typescript-eslint/no-unused-vars": [
+        "error",
+        {
+          argsIgnorePattern: "^_",
+          varsIgnorePattern: "^_",
+          args: "after-used",
+        },
+      ],
+      "@typescript-eslint/no-var-requires": "off",
+    },
+  },
+  {
+    files: ["**/*.js"],
+    languageOptions: {
+      ecmaVersion: "latest",
+      sourceType: "commonjs",
+      globals: {
+        ...globals.node,
+        NodeJS: "readonly",
+      },
+    },
+    rules: {
+      "no-console": "error",
+      "no-empty": "off",
+      "no-var": "off",
+      "prefer-const": "off",
+      "no-unused-vars": [
+        "error",
+        {
+          argsIgnorePattern: "^_",
+          varsIgnorePattern: "^_",
+          args: "after-used",
+        },
+      ],
+    },
+  },
+  prettier,
+];

htmlhint-server/src/server.ts

@@ -67,7 +67,7 @@ interface HtmlHintConfig {
 
 let settings: Settings | null = null;
 let linter: {
-  verify: (text: string, config?: HtmlHintConfig) => htmlhint.Error[];
+  verify: (_text: string, _config?: HtmlHintConfig) => htmlhint.Error[];
 } | null = null;
 
 /**
@@ -82,9 +82,8 @@ let htmlhintrcOptions: Record<string, HtmlHintConfig | null | undefined> = {};
  */
 function makeDiagnostic(
   problem: htmlhint.Error,
-  document: TextDocument,
+  _document: TextDocument,
 ): Diagnostic {
-  const lines = document.getText().split("\n");
   const col = problem.col - 1;
   const endCol = problem.col + (problem.raw?.length || 0) - 1;
 
@@ -2190,16 +2189,7 @@ async function createAutoFixes(
 }
 
 connection.onInitialize(
-  (params: InitializeParams, token: CancellationToken) => {
-    let initOptions: {
-      nodePath: string;
-    } = params.initializationOptions;
-    let nodePath = initOptions
-      ? initOptions.nodePath
-        ? initOptions.nodePath
-        : undefined
-      : undefined;
-
+  (_params: InitializeParams, _token: CancellationToken) => {
     // Since Files API is no longer available, we'll use embedded htmlhint directly
     linter = (htmlhint.default ||
       htmlhint.HTMLHint ||
@@ -2281,7 +2271,6 @@ function doValidate(connection: Connection, document: TextDocument): void {
     }
 
     let contents = document.getText();
-    let lines = contents.split("\n");
 
     let config = getConfiguration(fsPath);
     trace(`[DEBUG] Loaded config: ${JSON.stringify(config)}`);

htmlhint/package.json

@@ -26,7 +26,7 @@
     "Linters"
   ],
   "engines": {
-    "vscode": "^1.89.0"
+    "vscode": "^1.101.0"
   },
   "activationEvents": [
     "onLanguage:html",
@@ -91,8 +91,8 @@
     "package": "vsce package"
   },
   "devDependencies": {
-    "@types/node": "^22.15.31",
-    "@types/vscode": "^1.89.0",
+    "@types/node": "^22.19.1",
+    "@types/vscode": "^1.101.0",
     "@vscode/test-electron": "^2.5.2",
     "typescript": "5.5.4"
   },