Fix(grep): memory overflow in grep search and enhance test coverage (#5911)

Co-authored-by: Jacob Richman <jacob314@gmail.com>

packages/cli/src/config/config.test.ts

@@ -1562,6 +1562,46 @@ describe('loadCliConfig chatCompression', () => {
   });
 });
 
+describe('loadCliConfig useRipgrep', () => {
+  const originalArgv = process.argv;
+
+  beforeEach(() => {
+    vi.resetAllMocks();
+    vi.mocked(os.homedir).mockReturnValue('/mock/home/user');
+    vi.stubEnv('GEMINI_API_KEY', 'test-api-key');
+  });
+
+  afterEach(() => {
+    process.argv = originalArgv;
+    vi.unstubAllEnvs();
+    vi.restoreAllMocks();
+  });
+
+  it('should be false by default when useRipgrep is not set in settings', async () => {
+    process.argv = ['node', 'script.js'];
+    const argv = await parseArguments();
+    const settings: Settings = {};
+    const config = await loadCliConfig(settings, [], 'test-session', argv);
+    expect(config.getUseRipgrep()).toBe(false);
+  });
+
+  it('should be true when useRipgrep is set to true in settings', async () => {
+    process.argv = ['node', 'script.js'];
+    const argv = await parseArguments();
+    const settings: Settings = { useRipgrep: true };
+    const config = await loadCliConfig(settings, [], 'test-session', argv);
+    expect(config.getUseRipgrep()).toBe(true);
+  });
+
+  it('should be false when useRipgrep is explicitly set to false in settings', async () => {
+    process.argv = ['node', 'script.js'];
+    const argv = await parseArguments();
+    const settings: Settings = { useRipgrep: false };
+    const config = await loadCliConfig(settings, [], 'test-session', argv);
+    expect(config.getUseRipgrep()).toBe(false);
+  });
+});
+
 describe('loadCliConfig tool exclusions', () => {
   const originalArgv = process.argv;
   const originalIsTTY = process.stdin.isTTY;

packages/cli/src/config/config.ts

@@ -552,6 +552,7 @@ export async function loadCliConfig(
     folderTrust,
     interactive,
     trustedFolder,
+    useRipgrep: settings.useRipgrep,
     shouldUseNodePtyShell: settings.shouldUseNodePtyShell,
     skipNextSpeakerCheck: settings.skipNextSpeakerCheck,
     enablePromptCompletion: settings.enablePromptCompletion ?? false,

packages/cli/src/config/settingsSchema.test.ts

@@ -52,6 +52,7 @@ describe('SettingsSchema', () => {
         'model',
         'hasSeenIdeIntegrationNudge',
         'folderTrustFeature',
+        'useRipgrep',
       ];
 
       expectedSettings.forEach((setting) => {

packages/cli/src/config/settingsSchema.ts

@@ -534,6 +534,16 @@ export const SETTINGS_SCHEMA = {
     description: 'Skip the next speaker check.',
     showInDialog: true,
   },
+  useRipgrep: {
+    type: 'boolean',
+    label: 'Use Ripgrep',
+    category: 'Tools',
+    requiresRestart: false,
+    default: false,
+    description:
+      'Use ripgrep for file content search instead of the fallback implementation. Provides faster search performance.',
+    showInDialog: true,
+  },
   enablePromptCompletion: {
     type: 'boolean',
     label: 'Enable Prompt Completion',