fix(core): use ripgrep --json output for robust cross-platform parsing (#12853)

integration-tests/ripgrep-real.test.ts

@@ -0,0 +1,91 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect, beforeAll, afterAll } from 'vitest';
+import * as path from 'node:path';
+import * as fs from 'node:fs/promises';
+import * as os from 'node:os';
+import { RipGrepTool } from '../packages/core/src/tools/ripGrep.js';
+import { Config } from '../packages/core/src/config/config.js';
+import { WorkspaceContext } from '../packages/core/src/utils/workspaceContext.js';
+
+// Mock Config to provide necessary context
+class MockConfig {
+  constructor(private targetDir: string) {}
+
+  getTargetDir() {
+    return this.targetDir;
+  }
+
+  getWorkspaceContext() {
+    return new WorkspaceContext(this.targetDir, [this.targetDir]);
+  }
+
+  getDebugMode() {
+    return true;
+  }
+}
+
+describe('ripgrep-real-direct', () => {
+  let tempDir: string;
+  let tool: RipGrepTool;
+
+  beforeAll(async () => {
+    tempDir = await fs.mkdtemp(path.join(os.tmpdir(), 'ripgrep-real-test-'));
+
+    // Create test files
+    await fs.writeFile(path.join(tempDir, 'file1.txt'), 'hello world\n');
+    await fs.mkdir(path.join(tempDir, 'subdir'));
+    await fs.writeFile(
+      path.join(tempDir, 'subdir', 'file2.txt'),
+      'hello universe\n',
+    );
+    await fs.writeFile(path.join(tempDir, 'file3.txt'), 'goodbye moon\n');
+
+    const config = new MockConfig(tempDir) as unknown as Config;
+    tool = new RipGrepTool(config);
+  });
+
+  afterAll(async () => {
+    await fs.rm(tempDir, { recursive: true, force: true });
+  });
+
+  it('should find matches using the real ripgrep binary', async () => {
+    const invocation = tool.build({ pattern: 'hello' });
+    const result = await invocation.execute(new AbortController().signal);
+
+    expect(result.llmContent).toContain('Found 2 matches');
+    expect(result.llmContent).toContain('file1.txt');
+    expect(result.llmContent).toContain('L1: hello world');
+    expect(result.llmContent).toContain('subdir'); // Should show path
+    expect(result.llmContent).toContain('file2.txt');
+    expect(result.llmContent).toContain('L1: hello universe');
+
+    expect(result.llmContent).not.toContain('goodbye moon');
+  });
+
+  it('should handle no matches correctly', async () => {
+    const invocation = tool.build({ pattern: 'nonexistent_pattern_123' });
+    const result = await invocation.execute(new AbortController().signal);
+
+    expect(result.llmContent).toContain('No matches found');
+  });
+
+  it('should respect include filters', async () => {
+    // Create a .js file
+    await fs.writeFile(
+      path.join(tempDir, 'script.js'),
+      'console.log("hello");\n',
+    );
+
+    const invocation = tool.build({ pattern: 'hello', include: '*.js' });
+    const result = await invocation.execute(new AbortController().signal);
+
+    expect(result.llmContent).toContain('Found 1 match');
+    expect(result.llmContent).toContain('script.js');
+    expect(result.llmContent).not.toContain('file1.txt');
+  });
+});