syblock-rpip 0.1.4

Resumable Package Installer - a wrapper around pip for robust downloads

Resumable PIP

A Command-Line Interface (CLI) tool that wraps pip to provide resumable downloads for Python packages, especially useful for large packages (like PyTorch or TensorFlow) on flaky internet connections.

Features

• Resumable Downloads: Automatically resume interrupted downloads
• Platform Independent: Works on Windows, macOS, and Linux without external dependencies
• Multiple Downloaders: Supports aria2c, wget, curl, or native Python (automatic fallback)
• File Integrity: SHA256/SHA512 hash verification for downloaded packages
• Progress Tracking: Real-time download progress with speed and size information
• Robust Error Handling: Informative error messages with recovery instructions

Installation

pipx install syblock-rpip
# OR
pip install syblock-rpip

Prerequisites

No external dependencies required! The tool includes a native Python downloader with full resume support.

For better performance, you can optionally install:

• aria2c (recommended for best performance and speed)
• wget
• curl

If none are available, rpip automatically uses the built-in Python downloader.

Usage

# Single package installation
rpip package-name

# With version specifier
rpip "package-name==1.2.3"

# With pip options
rpip package-name --user

# Install from requirements file
rpip -r requirements.txt
rpip --requirement requirements.txt

# Auto-detect requirements file
rpip requirements.txt

# Examples
rpip torch
rpip "tensorflow>=2.0"
rpip numpy --upgrade
rpip -r requirements.txt --user

How It Works

Single Package

1. Uses pip's resolution engine to find the correct package URL
2. Selects the best available downloader (aria2c > wget > curl > native Python)
3. Downloads the package file with full resume support via HTTP Range requests
4. Verifies file integrity using SHA256/SHA512 hash (if available)
5. Installs the package using pip
6. Cleans up the downloaded file on success

Requirements File

1. Parses the requirements file (supports comments, nested -r, and most pip syntax)
2. Installs each package sequentially with full resumable download support
3. Tracks successful and failed installations
4. Provides a detailed summary at the end

Download Methods

The tool automatically selects the best available downloader:

1. aria2c - Multi-connection downloads, fastest performance
2. wget - Reliable, widely available on Linux/macOS
3. curl - Built-in on most systems
4. Python urllib - Native fallback, works everywhere, includes progress bar

Requirements File Support

rpip supports standard requirements.txt syntax including:

• ✅ Package names with version specifiers (package==1.0.0, package>=2.0)
• ✅ Comments (lines starting with # or inline with #)
• ✅ Nested requirements files (-r other-requirements.txt)
• ✅ Blank lines
• ✅ Editable installs (-e ., -e git+https://...#egg=package)
• ✅ Pip options (--index-url, --extra-index-url, --trusted-host, etc.)

Editable Installs

Editable installs are fully supported! These are installed directly via pip (no download/resume needed since git has its own resume capability):

# In requirements.txt:
-e .
-e /path/to/local/package
-e git+https://github.com/user/repo.git#egg=package
--editable git+https://github.com/user/repo.git@branch#egg=package

When rpip encounters an editable install, it passes it directly to pip for installation.

Pip Options

Important pip options are fully supported and applied to all package installations:

# In requirements.txt:
--index-url https://my-private-pypi.org/simple
--extra-index-url https://pypi.org/simple
--trusted-host my-private-pypi.org
--find-links https://download.pytorch.org/whl/torch_stable.html

requests==2.28.0
numpy>=1.20.0

Supported options:

• --index-url - Custom PyPI server
• --extra-index-url - Additional package indexes
• --trusted-host - Allow HTTP (non-HTTPS) hosts
• --find-links - Additional package sources
• --no-index, --prefer-binary, --pre, --no-binary, --only-binary

These options are extracted from the requirements file and applied to ALL package installations in that file.

Limitations

• Packages are installed sequentially (not in parallel) to ensure resumability

Development

Running Tests

Install with test dependencies:

pip install -e ".[test]"
# or with all dev dependencies
pip install -e ".[dev]"

Run the test suite:

# Run all tests
pytest

# Run with coverage
pytest --cov=. --cov-report=html

Test Coverage

The project includes comprehensive unit and integration tests (40 tests):

• Unit tests - Test individual functions in isolation
• Integration tests - Test complete workflows
• Download tests - Test actual package downloads from PyPI (disabled by default)
• Editable install tests - Test -e and --editable support
• Fixtures - Sample requirements files for testing

See tests/README.md for detailed testing documentation.

Contributing

1. Fork the repository
2. Create a feature branch
3. Write tests for new features
4. Ensure all tests pass
5. Submit a pull request

License

MIT License