ZIM to EPUB Converter

A Python command-line tool to convert ZIM files (used by Kiwix and others for offline content) to EPUB format for e-readers.

Features

• Convert ZIM files to EPUB format with robust error handling
• Option to include or exclude images
• Automatic table of contents generation based on article names
• Limit the number of articles to include
• Preserves metadata from the ZIM file
• Clean, readable formatting for e-readers
• Handles URL-encoded paths and special characters
• Supports various ZIM file structures and formats
• Extracts content from main entry when standard article paths aren't available
• Avoids duplicate images in the output EPUB
• Full crawl mode for problematic ZIM files

Platform Support

This package is compatible with:

• Linux (Debian, Ubuntu, Fedora, etc.)
• macOS

Note: Windows is not currently supported due to limitations with the libzim library.

Recent Updates

• Package Structure: Reorganized into a proper Python package structure for better maintainability
• Improved URL handling: Added support for URL-encoded paths and special characters
• Enhanced image processing: Fixed issues with duplicate images and improved mimetype detection
• Better article extraction: Added multiple methods to extract articles from different ZIM file structures
• Robust error handling: Added comprehensive error handling and fallback mechanisms
• Detailed logging: Added verbose logging to help diagnose issues
• CI/CD Pipeline: Added GitHub Actions for automated testing and releases
• Full crawl mode: Added option to crawl through all entries in the ZIM file

Installation

Prerequisites

• Python 3.6 or higher
• C++ libzim library (required for the Python bindings)
• Linux or macOS operating system

Installing C++ libzim

macOS

brew install libzim

Debian/Ubuntu

apt-get install libzim-dev

Fedora

dnf install libzim-devel

Installing from PyPI

You can install the package directly from PyPI:

USE_SYSTEM_LIBZIM=1 pip install zim2epub

Installing from Source

1. Clone this repository:

   git clone https://github.com/izzoa/zim2epub.git
   cd zim2epub
   

2. Install the required dependencies:

   USE_SYSTEM_LIBZIM=1 pip install -r requirements.txt
   

3. Install the package:

   pip install .
   

   Or in development mode:

   pip install -e .
   

Usage

Basic usage

python -m zim2epub.cli path/to/your/file.zim

This will create an EPUB file with the same name as the input file in the current directory.

Command-line Options

usage: python -m zim2epub.cli [-h] [-o OUTPUT] [--no-images] [--no-toc] [--max-articles MAX_ARTICLES] [-v] [--debug] [--full-crawl] zim_file

Convert ZIM files to EPUB format

positional arguments:
  zim_file              Path to the ZIM file to convert

optional arguments:
  -h, --help            show this help message and exit
  -o OUTPUT, --output OUTPUT
                        Path for the output EPUB file (default: same as input with .epub extension)
  --no-images           Do not include images in the EPUB (default: False)
  --no-toc              Do not generate a table of contents (default: False)
  --max-articles MAX_ARTICLES
                        Maximum number of articles to include (default: None)
  -v, --verbose         Show verbose output (default: False)
  --debug               Show per-entry diagnostics (implies --verbose) (default: False)
  --full-crawl          Use full crawl mode to extract all articles (default: False)

Examples

Convert a ZIM file without images (useful for smaller file size):

python -m zim2epub.cli wikipedia.zim --no-images

Convert a ZIM file with a custom output path:

python -m zim2epub.cli wikipedia.zim -o my-wikipedia.epub

Convert only the first 100 articles of a ZIM file:

python -m zim2epub.cli wikipedia.zim --max-articles 100

Enable verbose output for debugging:

python -m zim2epub.cli wikipedia.zim -v

Enable full crawl mode for problematic ZIM files:

python -m zim2epub.cli wikipedia.zim --full-crawl

Using as a Library

You can also use the ZimToEpub class directly in your Python code:

from zim2epub import ZimToEpub

converter = ZimToEpub(
    zim_path="path/to/file.zim",
    output_path="output.epub",
    include_images=True,
    generate_toc=True,
    max_articles=None,
    verbose=True,
    full_crawl=False  # Set to True to use full crawl mode
)

output_path = converter.convert()
print(f"EPUB created at: {output_path}")

Development

Running Tests

pytest

Building the Package

python -m build

Creating a Release

1. Update the version in zim2epub/__init__.py
2. Create a new tag:

   git tag -a v0.1.0 -m "Release v0.1.0"
   

3. Push the tag:

   git push origin v0.1.0
   

The GitHub Actions workflow will automatically build and publish the release to PyPI.

Troubleshooting

If you encounter issues:

1. Try running with the -v flag to see detailed logs
2. Make sure you have the C++ libzim library installed
3. Check that your ZIM file is valid and not corrupted
4. For image issues, try using the --no-images flag
5. For problematic ZIM files, try using the --full-crawl flag

Requirements

• Python 3.6 or higher
• libzim (Python bindings for the ZIM file format)
• EbookLib (for EPUB creation)
• BeautifulSoup4 (for HTML parsing)
• tqdm (for progress bars)
• lxml (for XML processing)

License

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

Acknowledgments

• The OpenZIM project for the libzim library
• EbookLib for EPUB creation functionality