tools: move ESLint tools to tools/eslint

With ESLint flat config, we don't need a hack with `node_modules`
anymore to load ESLint plugins.
This commit moves the node-core plugin out of `tools/node_modules` and
creates a new `tools/eslint` directory to store ESLint tools.

PR-URL: https://github.com/nodejs/node/pull/53393
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: Yagiz Nizipli <yagiz.nizipli@sentry.io>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>

Makefile

@@ -1188,6 +1188,7 @@ $(TARBALL): release-only doc-only
 	$(RM) -r $(TARNAME)/doc/images # too big
 	$(RM) -r $(TARNAME)/test*.tap
 	$(RM) -r $(TARNAME)/tools/cpplint.py
+	$(RM) -r $(TARNAME)/tools/eslint
 	$(RM) -r $(TARNAME)/tools/eslint-rules
 	$(RM) -r $(TARNAME)/tools/license-builder.sh
 	$(RM) -r $(TARNAME)/tools/node_modules

benchmark/eslint.config_partial.mjs

@@ -1,4 +1,4 @@
-import { requireEslintTool } from '../tools/eslint.config_utils.mjs';
+import { requireEslintTool } from '../tools/eslint/eslint.config_utils.mjs';
 
 const globals = requireEslintTool('globals');
 

doc/eslint.config_partial.mjs

@@ -1,4 +1,4 @@
-import { requireEslintTool } from '../tools/eslint.config_utils.mjs';
+import { requireEslintTool } from '../tools/eslint/eslint.config_utils.mjs';
 
 const globals = requireEslintTool('globals');
 

eslint.config.mjs

@@ -5,13 +5,14 @@ import benchmarkConfig from './benchmark/eslint.config_partial.mjs';
 import docConfig from './doc/eslint.config_partial.mjs';
 import libConfig from './lib/eslint.config_partial.mjs';
 import testConfig from './test/eslint.config_partial.mjs';
-import toolsConfig from './tools/eslint.config_partial.mjs';
+import toolsConfig from './tools/eslint/eslint.config_partial.mjs';
 import {
   noRestrictedSyntaxCommonAll,
   noRestrictedSyntaxCommonLib,
   requireEslintTool,
   resolveEslintTool,
-} from './tools/eslint.config_utils.mjs';
+} from './tools/eslint/eslint.config_utils.mjs';
+import nodeCore from './tools/eslint/eslint-plugin-node-core.js';
 
 const js = requireEslintTool('@eslint/js');
 const babelEslintParser = requireEslintTool('@babel/eslint-parser');
@@ -20,7 +21,6 @@ const jsdoc = requireEslintTool('eslint-plugin-jsdoc');
 const markdown = requireEslintTool('eslint-plugin-markdown');
 const stylisticJs = requireEslintTool('@stylistic/eslint-plugin-js');
 
-const nodeCore = requireEslintTool('eslint-plugin-node-core');
 nodeCore.RULES_DIR = fileURLToPath(new URL('./tools/eslint-rules', import.meta.url));
 
 // The Module._resolveFilename() monkeypatching is to make it so that ESLint is able to

lib/eslint.config_partial.mjs

@@ -3,7 +3,7 @@
 import {
   noRestrictedSyntaxCommonAll,
   noRestrictedSyntaxCommonLib,
-} from '../tools/eslint.config_utils.mjs';
+} from '../tools/eslint/eslint.config_utils.mjs';
 
 export default [
   {

test/eslint.config_partial.mjs

@@ -3,7 +3,7 @@
 import {
   noRestrictedSyntaxCommonAll,
   requireEslintTool,
-} from '../tools/eslint.config_utils.mjs';
+} from '../tools/eslint/eslint.config_utils.mjs';
 
 const globals = requireEslintTool('globals');
 

tools/eslint/eslint-plugin-node-core.js

@@ -13,7 +13,7 @@ module.exports = {
     if (!cache) {
       cache = {};
       const files = fs.readdirSync(RULES_DIR)
-        .filter(filename => filename.endsWith('.js'))
+        .filter((filename) => filename.endsWith('.js'));
       for (const file of files) {
         const name = file.slice(0, -3);
         cache[name] = require(path.resolve(RULES_DIR, file));

tools/eslint/eslint.config_utils.mjs

@@ -1,6 +1,6 @@
 import { createRequire } from 'node:module';
 
-export const requireEslintTool = createRequire(new URL('./node_modules/eslint/', import.meta.url));
+export const requireEslintTool = createRequire(new URL('../node_modules/eslint/', import.meta.url));
 export const resolveEslintTool = (request) => requireEslintTool.resolve(request);
 
 export const noRestrictedSyntaxCommonAll = [