Migrate ESlint to flat config

eslint.config.mjs

@@ -0,0 +1,110 @@
+import jsdoc from "eslint-plugin-jsdoc";
+import globals from "globals";
+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: ["lib/thirdparty/"],
+	},
+	...compat.extends("eslint:recommended", "google"),
+	{
+		plugins: {
+			jsdoc,
+		},
+
+		languageOptions: {
+			globals: {
+				...globals.node,
+			},
+
+			ecmaVersion: 8,
+			sourceType: "commonjs",
+		},
+
+		settings: {
+			jsdoc: {
+				tagNamePreference: {
+					return: "returns",
+				},
+			},
+		},
+
+		rules: {
+			indent: ["error", "tab"],
+			"linebreak-style": ["error", "unix"],
+
+			quotes: [
+				"error",
+				"double",
+				{
+					allowTemplateLiterals: true,
+				},
+			],
+
+			semi: ["error", "always"],
+			"no-negated-condition": "off",
+			"require-jsdoc": "off",
+			"no-mixed-requires": "off",
+
+			"max-len": [
+				"warn", // TODO: set to "error" and fix all findings
+				{
+					code: 120,
+					ignoreUrls: true,
+					ignoreRegExpLiterals: true,
+				},
+			],
+
+			"no-implicit-coercion": [
+				2,
+				{
+					allow: ["!!"],
+				},
+			],
+
+			"comma-dangle": "off",
+			"no-tabs": "off",
+
+			"valid-jsdoc": 0,
+			// Starting with ESLint v8, it needs to be disabled as it currently can't be supported
+			// See: https://github.com/eslint/eslint/issues/14745
+			"jsdoc/check-examples": 0,
+			"jsdoc/check-param-names": 2,
+			"jsdoc/check-tag-names": 2,
+			"jsdoc/check-types": 2,
+			"jsdoc/no-undefined-types": 0,
+			"jsdoc/require-description": 0,
+			"jsdoc/require-description-complete-sentence": 0,
+			"jsdoc/require-example": 0,
+			"jsdoc/require-hyphen-before-param-description": 0,
+			"jsdoc/require-param": 2,
+			"jsdoc/require-param-description": 0,
+			"jsdoc/require-param-name": 2,
+			"jsdoc/require-param-type": 2,
+			"jsdoc/require-returns": 0,
+			"jsdoc/require-returns-description": 0,
+			"jsdoc/require-returns-type": 2,
+
+			"jsdoc/tag-lines": [
+				2,
+				"any",
+				{
+					startLines: 1,
+				},
+			],
+
+			"jsdoc/valid-types": 0,
+		},
+	},
+];