GitHub OAuth Integration for Private Repositories

This update introduces comprehensive support for handling private GitHub repositories by integrating GitHub OAuth authentication. The key updates include:

🔑 Authentication & Repository Access

1. Secure Repository Cloning

• Enhancedclone_repo function: Now accepts an optional OAuth token.
• OAuth token integration: Injects the token into the GitHub repository URL for authentication.
• Improved error handling:
  • _check_repo_exists now verifies the repository using authentication headers.
  • Ensures private repositories are only accessible with a valid token.

2. OAuth Authentication Routes

• Introduced a new module:src/server/oauth.py.
• Implements GitHub authentication flow usingAuthlib:
  • Login via GitHub.
  • Callback handling for OAuth.
  • Logout to clear sessions.

3. Session Middleware for Token Management

• Session-based authentication integrated insrc/server/main.py.
• Stores OAuth tokens securely in cookie-based sessions.
• Allows other endpoints (e.g.,query_processor) to access and pass tokens toclone_repo.

🖥️ UI & User Experience

4. Authentication UI Updates

• Modifiednavbar.jinja:
  • Displays"Login with GitHub" when no token is present.
  • Shows"Logout" when authenticated.

📖 Documentation & Configuration

5. UpdatedREADME.md

• Guides on using private repo access.
• Instructions for setting up OAuth credentials for:
  • Production environments.
  • Local testing.

🛠️ Miscellaneous Enhancements

6. Additional Improvements

• .gitignore updates: Ignores new directories.
• requirements.txt updates: Adds dependencies for:
  • Authlib
  • itsdangerous

These changesenhance security, usability, and documentation, enabling seamless private repository integration via GitHub OAuth. 🚀