feat(eslint): Add support to ignore .gitignore entries

Author: TheCodeDestroyer

.changeset/empty-banks-stay.md

@@ -0,0 +1,5 @@
+---
+'@tcd-devkit/eslint-config': patch
+---
+
+Add support to ignore .gitignore entries

packages/eslint/eslint-config/package.json

@@ -65,6 +65,7 @@
     "test:watch": "vitest --watch"
   },
   "dependencies": {
+    "@eslint/compat": "1.2.9",
     "@eslint/js": "9.27.0"
   },
   "devDependencies": {

packages/eslint/eslint-config/src/base.linter.ts

@@ -1,10 +1,26 @@
+import fs from 'node:fs';
+import { fileURLToPath } from 'node:url';
+
+import { includeIgnoreFile } from '@eslint/compat';
 import eslintPlugin from '@eslint/js';
 import type { Linter } from 'eslint';
 import { defineConfig } from 'eslint/config';
 
 import { baseRules } from '#base.rules';
 
+const cwdURL = `file://${process.cwd()}/`;
+const gitignorePath = fileURLToPath(new URL(`.gitignore`, cwdURL));
+
+const fileExists = fs.existsSync(gitignorePath);
+
+let gitignoreConfig = {};
+
+if (fileExists) {
+  gitignoreConfig = includeIgnoreFile(gitignorePath);
+}
+
 export const baseConfig: Linter.Config[] = defineConfig([
+  gitignoreConfig,
   {
     name: '@tcd-devkit/eslint-config',
     extends: [eslintPlugin.configs.recommended],