GitAuto: qt5をqt6に置き換えたい

[gitauto-ai[bot]]

Resolves #141

What is the feature

This pull request proposes replacing Qt5 with Qt6 in the project.

Why we need the feature

Upgrading to Qt6 offers several benefits:

• Performance Enhancements: Qt6 brings significant performance improvements due to optimizations in rendering and memory management.
• Access to New Features: Qt6 introduces new modules and functionality, enabling us to leverage the latest tools and components.
• Long-Term Support: As Qt5 will eventually reach end-of-life, migrating to Qt6 ensures continued support and updates.
• Improved Compatibility: Qt6 aligns with modern C++ standards and integrates better with contemporary development environments.

How to implement and why

Implementing this feature involves several key steps:

1. Update Project Configuration:

   • Modify Build Files: Update CMakeLists.txt, qmake, or other build scripts to reference Qt6 libraries instead of Qt5.
     • Replace instances of find_package(Qt5 COMPONENTS...) with find_package(Qt6 COMPONENTS...).
   • Why: Ensures the project links against the correct Qt6 libraries during compilation.

2. Review and Refactor Code:

   • Identify Deprecated APIs: Scan the codebase for Qt5 APIs that have been deprecated or removed in Qt6.
     • Use Qt's porting tools or static code analyzers to assist in this process.
   • Refactor Code: Update or replace deprecated functions and classes with their Qt6 equivalents.
     • Pay attention to modules like Qt Quick, Qt Widgets, and Multimedia, which may have significant changes.
   • Why: Maintaining compatibility with Qt6 APIs is crucial for the application to function correctly.

3. Adjust UI Elements:

   • Update QML Files: If the project uses QML, ensure all imports are updated to Qt6 versions.
     • For example, change import QtQuick 2.15 to import QtQuick 6.0.
   • Revise Styling and Themes: Qt6 may handle styles differently; adjust them as needed.
   • Why: Guarantees that the user interface renders properly with the new Qt version.

4. Rebuild and Test the Application:

   • Compile the Project: Perform a full rebuild to ensure all changes are incorporated.
   • Run Automated Tests: Execute existing unit and integration tests to catch regressions.
   • Manual Testing: Manually test critical functionalities, focusing on areas interacting heavily with Qt.
   • Why: Testing validates that the application remains stable and functional after the upgrade.

5. Update Documentation:

   • Revise Setup Guides: Update any documentation related to building and setting up the project to reflect the use of Qt6.
   • Inform Stakeholders: Notify team members and contributors about the upgrade and any new requirements.
   • Why: Keeps all project documentation accurate, facilitating a smooth transition for all users.

6. Utilize AI for Code Assistance:

   • Implement AI Tools: Leverage AI-driven code analysis tools to automate parts of the refactoring process.
     • Tools like Qt's own porting tools can expedite the migration.
   • Why: Enhances efficiency by reducing manual effort and minimizing human error during the upgrade.

About backward compatibility

• Breaking Changes:

  • Qt6 introduces some breaking changes that may affect the application's behavior.
  • Certain modules and APIs available in Qt5 have been modified or are no longer available.

• No Support for Qt5 After Upgrade:

  • Post-upgrade, the application will no longer be compatible with Qt5.
  • Maintaining backward compatibility would require additional effort to support both versions concurrently.

• Decision on Compatibility:

  • Given the benefits of Qt6 and the resources required to support both versions, it's reasonable to proceed without backward compatibility.
  • Focus can be directed toward optimizing and improving the application with the latest features Qt6 offers.

By accepting these changes, the project embraces modernization, ensures future viability, and enhances overall performance.

Test these changes locally

git checkout -b gitauto/issue-#141-eb2a7344-4c52-4fcf-be8e-662556e1f527
git pull origin gitauto/issue-#141-eb2a7344-4c52-4fcf-be8e-662556e1f527