feat(core): Add .gitignore support to getFolderStructure (#865)

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

@@ -4,11 +4,13 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+/* eslint-disable @typescript-eslint/no-explicit-any */
 import { describe, it, expect, vi, beforeEach, afterEach, Mock } from 'vitest';
 import fsPromises from 'fs/promises';
 import { Dirent as FSDirent } from 'fs';
 import * as nodePath from 'path';
 import { getFolderStructure } from './getFolderStructure.js';
+import * as gitUtils from './gitUtils.js';
 
 vi.mock('path', async (importOriginal) => {
   const original = (await importOriginal()) as typeof nodePath;
@@ -20,6 +22,7 @@ vi.mock('path', async (importOriginal) => {
 });
 
 vi.mock('fs/promises');
+vi.mock('./gitUtils.js');
 
 // Import 'path' again here, it will be the mocked version
 import * as path from 'path';
@@ -276,3 +279,61 @@ Showing up to 3 items (files + folders).
     expect(structure.trim()).toBe(expected);
   });
 });
+
+describe('getFolderStructure gitignore', () => {
+  beforeEach(() => {
+    vi.resetAllMocks();
+    (path.resolve as Mock).mockImplementation((str: string) => str);
+
+    (fsPromises.readdir as Mock).mockImplementation(async (p) => {
+      const path = p.toString();
+      if (path === '/test/project') {
+        return [
+          createDirent('file1.txt', 'file'),
+          createDirent('node_modules', 'dir'),
+          createDirent('ignored.txt', 'file'),
+          createDirent('.gemini', 'dir'),
+        ] as any;
+      }
+      if (path === '/test/project/node_modules') {
+        return [createDirent('some-package', 'dir')] as any;
+      }
+      if (path === '/test/project/.gemini') {
+        return [
+          createDirent('config.yaml', 'file'),
+          createDirent('logs.json', 'file'),
+        ] as any;
+      }
+      return [];
+    });
+
+    (fsPromises.readFile as Mock).mockImplementation(async (p) => {
+      const path = p.toString();
+      if (path === '/test/project/.gitignore') {
+        return 'ignored.txt\nnode_modules/\n.gemini/\n!/.gemini/config.yaml';
+      }
+      return '';
+    });
+
+    vi.mocked(gitUtils.isGitRepository).mockReturnValue(true);
+  });
+
+  it('should ignore files and folders specified in .gitignore', async () => {
+    const structure = await getFolderStructure('/test/project', {
+      projectRoot: '/test/project',
+    });
+    expect(structure).not.toContain('ignored.txt');
+    expect(structure).toContain('node_modules/...');
+    expect(structure).not.toContain('logs.json');
+  });
+
+  it('should not ignore files if respectGitIgnore is false', async () => {
+    const structure = await getFolderStructure('/test/project', {
+      projectRoot: '/test/project',
+      respectGitIgnore: false,
+    });
+    expect(structure).toContain('ignored.txt');
+    // node_modules is still ignored by default
+    expect(structure).toContain('node_modules/...');
+  });
+});