feat(core): Download ripgrep at runtime, if enabled. (#7818)

packages/core/src/utils/fileUtils.test.ts

@@ -28,6 +28,7 @@ import {
   processSingleFileContent,
   detectBOM,
   readFileWithEncoding,
+  fileExists,
 } from './fileUtils.js';
 import { StandardFileSystemService } from '../services/fileSystemService.js';
 
@@ -133,6 +134,25 @@ describe('fileUtils', () => {
     });
   });
 
+  describe('fileExists', () => {
+    it('should return true if the file exists', async () => {
+      const testFile = path.join(tempRootDir, 'exists.txt');
+      actualNodeFs.writeFileSync(testFile, 'content');
+      await expect(fileExists(testFile)).resolves.toBe(true);
+    });
+
+    it('should return false if the file does not exist', async () => {
+      const testFile = path.join(tempRootDir, 'does-not-exist.txt');
+      await expect(fileExists(testFile)).resolves.toBe(false);
+    });
+
+    it('should return true for a directory that exists', async () => {
+      const testDir = path.join(tempRootDir, 'exists-dir');
+      actualNodeFs.mkdirSync(testDir);
+      await expect(fileExists(testDir)).resolves.toBe(true);
+    });
+  });
+
   describe('isBinaryFile', () => {
     let filePathForBinaryTest: string;
 

packages/core/src/utils/fileUtils.ts

@@ -5,6 +5,7 @@
  */
 
 import fs from 'node:fs';
+import fsPromises from 'node:fs/promises';
 import path from 'node:path';
 import type { PartUnion } from '@google/genai';
 // eslint-disable-next-line import/no-internal-modules
@@ -467,3 +468,12 @@ export async function processSingleFileContent(
     };
   }
 }
+
+export async function fileExists(filePath: string): Promise<boolean> {
+  try {
+    await fsPromises.access(filePath, fs.constants.F_OK);
+    return true;
+  } catch (_: unknown) {
+    return false;
+  }
+}