chore: update to eslint v9, remove markdown lint due to complexity

docs/api.md

@@ -259,7 +259,7 @@ interface TSConfckFindAllOptions {
 	 * helper to skip subdirectories when scanning for tsconfig.json
 	 *
 	 * eg ` dir => dir === 'node_modules' || dir === '.git'`
-	 */ // eslint-disable-next-line no-unused-vars
+	 */
 	skip?: (dir: string) => boolean;
 	/**
 	 * list of config filenames to include, use ["tsconfig.json","jsconfig.json"] if you need both

eslint.config.js

@@ -0,0 +1,43 @@
+import js from '@eslint/js';
+import prettier from 'eslint-plugin-prettier';
+import prettierRecommended from 'eslint-plugin-prettier/recommended';
+import node from 'eslint-plugin-n';
+
+export default [
+	js.configs.recommended,
+	node.configs['flat/recommended-module'],
+	prettierRecommended,
+	{
+		ignores: [
+			'packages/tsconfck/tests/fixtures/parse/invalid/**/*',
+			'packages/tsconfck/tests/fixtures/find-all/recursive-symlink/**/*',
+			'packages/tsconfck/tests/snapshots/**/*'
+		]
+	},
+	{
+		plugins: {
+			node,
+			prettier
+		}
+	},
+	{
+		languageOptions: {
+			globals: {
+				Atomics: 'readonly',
+				SharedArrayBuffer: 'readonly'
+			},
+			parserOptions: {
+				ecmaVersion: 2022
+			}
+		},
+		rules: {
+			'no-debugger': ['error']
+		}
+	},
+	{
+		files: ['**/tests/fixtures/**/*.js', '**/tests/fixtures/**/*.ts'],
+		rules: {
+			'no-unused-vars': 'off'
+		}
+	}
+];

package.json

@@ -7,7 +7,7 @@
 		"check": "run-p -c check:*",
 		"check:publint": "pnpm --filter \"./packages/*\" --parallel check:publint",
 		"check:types": "pnpm --filter \"./packages/*\" --parallel check:types",
-		"check:lint": "eslint --cache --ignore-path .gitignore '**/*.{js,md}'",
+		"check:lint": "eslint --cache '**/*.{js,md}'",
 		"check:format": "prettier --cache --ignore-path .gitignore --ignore-path .prettierignore --ignore-unknown --check .",
 		"lint": "pnpm check:lint --fix",
 		"format": "pnpm check:format --write",
@@ -21,10 +21,11 @@
 	},
 	"devDependencies": {
 		"@changesets/cli": "^2.27.5",
+		"@eslint/js": "^9.4.0",
 		"@svitejs/changesets-changelog-github-compact": "^1.1.0",
 		"dts-buddy": "^0.4.7",
 		"esbuild": "^0.21.5",
-		"eslint": "^8.57.0",
+		"eslint": "^9.4.0",
 		"eslint-config-prettier": "^9.1.0",
 		"eslint-plugin-markdown": "^5.0.0",
 		"eslint-plugin-n": "^17.8.1",

packages/tsconfck/src/parse-native.js

@@ -56,7 +56,7 @@ export async function parseNative(filename, options) {
 			await parseReferences(result, ts, options);
 			cache?.setParseResult(tsconfigFile, Promise.resolve(result));
 		}
-		//@ts-ignore
+
 		resolve(resolveSolutionTSConfig(filename, result));
 		return promise;
 	} catch (e) {

packages/tsconfck/src/public.d.ts

@@ -43,7 +43,7 @@ export interface TSConfckFindAllOptions {
 	 * helper to skip subdirectories when scanning for tsconfig.json
 	 *
 	 * eg ` dir => dir === 'node_modules' || dir === '.git'`
-	 */ // eslint-disable-next-line no-unused-vars
+	 */
 	skip?: (dir: string) => boolean;
 	/**
 	 * list of config filenames to include, use ["tsconfig.json","jsconfig.json"] if you need both

packages/tsconfck/tests/parse.js

@@ -226,6 +226,7 @@ describe('parse', () => {
 				new Promise((_, reject) => setTimeout(reject, 500))
 			]);
 			expect(results.length).toBe(samples.length);
+			// eslint-disable-next-line no-unused-vars
 		} catch (e) {
 			expect.fail(
 				`did not process all files, some of these are blocking each other:\n${[...unfinished].join(

packages/tsconfck/tests/util/copy-fixtures.js

@@ -13,6 +13,7 @@ export async function copyFixtures(from, to, filter) {
 	const dest = path.join('tests', 'temp', to);
 	try {
 		await fs.rm(dest, { recursive: true });
+		// eslint-disable-next-line no-unused-vars
 	} catch (e) {
 		// ignore
 	}

packages/tsconfck/types/index.d.ts

@@ -169,7 +169,7 @@ declare module 'tsconfck' {
 		 * helper to skip subdirectories when scanning for tsconfig.json
 		 *
 		 * eg ` dir => dir === 'node_modules' || dir === '.git'`
-		 */ // eslint-disable-next-line no-unused-vars
+		 */
 		skip?: (dir: string) => boolean;
 		/**
 		 * list of config filenames to include, use ["tsconfig.json","jsconfig.json"] if you need both