uplang 0.2.1

A command-line tool to streamline the process of updating language files for Minecraft Java Edition modpacks.

UpLang

UpLang is a powerful command-line tool designed to streamline localization workflows for Minecraft Java Edition modpacks. It automates the complex process of managing translation files across multiple mods, ensuring perfect synchronization between English and Chinese language files while preserving translation integrity and key ordering.

🚀 Key Features

• 🔍 Intelligent Mod Detection: Automatically scans and tracks new, updated, and deleted mods
• 🔄 Smart Synchronization: Maintains translation order while adding missing keys and removing obsolete ones
• 🛡️ Robust Error Handling: Advanced JSON parsing with multiple fallback strategies for malformed files
• 📊 Progress Tracking: Rich console interface with real-time progress indicators
• 🌐 Cross-Platform: Works seamlessly on Windows, macOS, and Linux
• ⚡ Incremental Updates: Efficient delta processing for large modpacks
• 🎯 Order Preservation: Maintains original key ordering in language files

📋 System Requirements

• Python: 3.11 or higher
• Operating System: Windows, macOS, or Linux
• Minecraft: Java Edition (Forge/Fabric mods)

🛠️ Installation

Option 1: From PyPI (Recommended)

The easiest way to install UpLang is directly from PyPI:

# Install UpLang
pip install uplang

# Verify installation
uplang --help

Option 2: Development Installation

For contributing or development purposes:

# Clone the repository
git clone https://github.com/QianFuv/UpLang.git
cd UpLang

# Using uv (recommended for development)
pip install uv
uv sync
uv pip install -e .

# Or using pip directly
pip install -e .

📖 Usage

Initial Setup

For new projects or when setting up a new resource pack:

uplang init <mods_directory> <resource_pack_directory>

Example:

uplang init "~/.minecraft/mods" "./MyResourcePack"

What it does:

• 🔍 Scans all JAR files in the mods directory
• 📂 Creates the necessary assets/<mod_id>/lang/ structure
• 📄 Extracts en_us.json from each mod
• 🔄 Copies or creates zh_cn.json files
• ⚙️ Performs initial synchronization
• 💾 Saves project state for future comparisons

Updating Translations

When you add, update, or remove mods:

uplang check <mods_directory> <resource_pack_directory>

Example:

uplang check "~/.minecraft/mods" "./MyResourcePack"

What it does:

• 📊 Compares current state with previous scan
• 🆕 Identifies new, updated, and deleted mods
• 🔄 Merges new translation keys into existing files
• 🧹 Removes obsolete keys
• ✅ Synchronizes all language files
• 💾 Updates project state

📁 Output Structure

After running UpLang, your resource pack will have this structure:

MyResourcePack/
├── assets/
│   ├── mod_one/
│   │   └── lang/
│   │       ├── en_us.json
│   │       └── zh_cn.json
│   ├── mod_two/
│   │   └── lang/
│   │       ├── en_us.json
│   │       └── zh_cn.json
│   └── ...
├── pack.mcmeta (if it exists)
├── .uplang_state.json (project state)
└── uplang_*.log (operation logs)

🧪 Testing

Run the comprehensive test suite to verify everything works correctly:

# If installed from PyPI
pip install uplang[test]
python -m pytest tests/test_integration.py -v

# If using development installation
uv run pytest tests/test_integration.py -v
# or
python -m pytest tests/test_integration.py -v

The tests create mock mods, run both init and check commands, and verify all functionality including:

• Language file extraction
• Synchronization logic
• Order preservation
• Error handling

🔧 Advanced Features

Robust JSON Processing

UpLang handles real-world edge cases:

• Multiple encodings: UTF-8, UTF-8-sig, Latin1, CP1252
• Malformed JSON: Trailing commas, unquoted keys, comments
• Encoding issues: UTF-8 BOM, surrogate characters
• Recovery strategies: Multiple parsing fallbacks

Translation Preservation

• Existing translations are always preserved during synchronization
• Key ordering follows the English language file structure
• Incremental updates only process changed files for efficiency
• Atomic operations ensure data integrity

Logging and Monitoring

• Detailed logs saved to timestamped files
• Progress indicators for long-running operations
• Error reporting with context and suggested solutions
• State tracking for debugging and auditing

🤝 Contributing

We welcome contributions! Please see our Contributing Guide for details on:

• 🐛 Reporting bugs
• 💡 Suggesting features
• 🔧 Setting up development environment
• 📝 Code style guidelines
• ✅ Testing requirements

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

• Built with Rich for beautiful console output
• Uses uv for fast dependency management
• Inspired by the Minecraft modding community's localization needs

📞 Support

• 🐛 Issues: GitHub Issues
• 💬 Discussions: GitHub Discussions
• 📧 Contact: Project Maintainer

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Made with ❤️ for the Minecraft modding community