Migrate ESLint to eslint.config.mjs

Author: dtdesign

.eslintignore

@@ -0,0 +1,68 @@
+import typescriptEslint from "@typescript-eslint/eslint-plugin";
+import tsParser from "@typescript-eslint/parser";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+	baseDirectory: __dirname,
+	recommendedConfig: js.configs.recommended,
+	allConfig: js.configs.all,
+});
+
+export default [
+	{
+		ignores: ["**/*.js", "**/extra", "node_modules/**/*", "eslint.config.mjs"],
+	},
+	...compat.extends(
+		"eslint:recommended",
+		"plugin:@typescript-eslint/recommended",
+		"plugin:@typescript-eslint/recommended-requiring-type-checking",
+		"prettier",
+	),
+	{
+		plugins: {
+			"@typescript-eslint": typescriptEslint,
+		},
+
+		languageOptions: {
+			parser: tsParser,
+			ecmaVersion: 5,
+			sourceType: "script",
+
+			parserOptions: {
+				tsconfigRootDir: __dirname,
+				project: ["./tsconfig.json", "./ts/WoltLabSuite/WebComponent/tsconfig.json"],
+			},
+		},
+
+		rules: {
+			"@typescript-eslint/no-explicit-any": 0,
+			"@typescript-eslint/no-non-null-assertion": 0,
+			"@typescript-eslint/no-unsafe-argument": 0,
+			"@typescript-eslint/no-unsafe-assignment": 0,
+			"@typescript-eslint/no-unsafe-call": 0,
+			"@typescript-eslint/no-unsafe-member-access": 0,
+			"@typescript-eslint/no-unsafe-return": 0,
+
+			"@typescript-eslint/no-unused-vars": [
+				"error",
+				{
+					argsIgnorePattern: "^_",
+					varsIgnorePattern: "^_",
+				},
+			],
+
+			"@typescript-eslint/no-misused-promises": [
+				"error",
+				{
+					checksVoidReturn: false,
+				},
+			],
+			"@typescript-eslint/prefer-promise-reject-errors": ["error", { allowEmptyReject: true }],
+		},
+	},
+];