srepkg 0.1.3

Repackages apps to restrict installation into isolated env

📦 srepkg (Solo Repackage)

srepkg is a Python package that wraps an isolation layer around other Python packages.

📖 Description

When a package wrapped in an isolation layer by srepkg is installed in an active, pre-existing Python environment:

• The original package plus its dependencies are installed in a new, automatically created virtual environment.
• A dependency-free "access" package installed in the pre-existing environment contains a controller module capable of making calls to the Python interpreter in the newly created environment.
• This package structure ensures that none of the original package's dependencies conflict with packages in the pre-existing environment but still exposes the original package’s CL to the pre-existing environment.

🎯 Use Cases

For Package Distributors

• srepkg can be useful if you are sharing a Python command line application, and you want to be certain that users can install and run it without worrying about dependency conflicts.
• Wrapping a CL package with srepkg prior to sharing the package with other users will ensure that wherever the package is installed, it does not introduce dependency conflicts into a user's existing Python environment — even if the user knows nothing about managing Python environments.

For Package Users

• Any existing CL package obtained from Python Packaging Index (PyPI) or GitHub can be wrapped with srepkg prior to installation.
• If you want the original package commands to be accessible from a single environment (that is distinct from the isolated environment where the original package is installed), then srepkg is likely a good option.
• However, if you want the isolated package's command interface to be available globally and/or want a much more mature isolation tool, then pipx is likely a better choice.

📘 Documentation

Full project documentation, including detailed examples, is available at: duanegoodner/github.io/srepkg

⚡ Quick Start

Requirements

• Python version 3.9 or higher
• For compatibility with srepkg, and existing package must:
  • Be installable via pip
  • Be compatible with the Python interpreter version that is running srepkg.
  • Have command line entry point(s) specified in either one the [project.scripts] section of a pyproject.toml (preferred), the [options.entry_points] section of a setup.cfg, or the entry_points arguments passed to setup() in a setupy.py file.
• Optional: miniconda or conda if you want to exactly follow the examples below

Simple Demo

# Create and activate a new conda environment for testing
conda create -n srepkg_test python=3.11
conda activate srepkg_test

# Install srepkg from PyPI
pip install srepkg

# Re-package a version of black, obtained from PyPI
srepkg black -r 25.1.0  # creates re-package wheel and sdist under ./srepkg_dists

# install our re-packaged wheel
pip install ./srepkg_dists/blacksrepkg-25.1.0-py3-none-any.whl

# Confirm blacksrepkg is installed and that black is NOT installed in our conda env
conda list | grep black
# Output:
# blacksrepkg               25.1.0                   pypi_0    pypi

# Check if any of black's dependencies are installed in our conda environment
onda list | grep "click\|\
mypy_extensions\|\
packaging\|\
pathspec\|\
platformdirs\|\
tomli\|\
typing_extensions"

# Output:
# packaging                 24.2                     pypi_0    pypi

# Note: 'packaging' is installed because it is a dependency of 'srepkg'.
# No other package that black depends on is in our environment.

# Confirm that we have access to the black CLI
black -c "def foo():print('hello,world')"
# Output:
# def foo():
#    print("hello,world")

Command Line Help

For details on all srepkg command options, run:

srepkg --help

🧪 Testing

To run the project tests, we can clone a copy of the repo locally, and install in editable mode with:

$ git clone https://github.com/duanegoodner/srepkg
$ cd srepkg
$ pip install -e '.[test]'

Then run the test suite and generate a coverage report:

$ coverage run -m pytest
$ coverage report -m

🤝 Contributing

Issues, Pull Requests and/or Discussions are welcome and appreciated!