pylibmagic v0.5.0

A lightweight, minimal python package that ships magic libraries using automake, CMake, scikit-build, and cibuildwheel.

Why?

If you use python-magic, you typically get an error like this

>>> import magic
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/kratsg/.pyenv/versions/venv/lib/python3.7/site-packages/magic/__init__.py", line 209, in <module>
    libmagic = loader.load_lib()
  File "/Users/kratsg/.pyenv/versions/venv/lib/python3.7/site-packages/magic/loader.py", line 49, in load_lib
    raise ImportError('failed to find libmagic.  Check your installation')
ImportError: failed to find libmagic.  Check your installation

which is frustrating because they don’t ship shared lib with their python distribution. pylibmagic helps fill in the missing gap by shipping the required magic library and adding it to your path, so you can just do:

>>> import pylibmagic
>>> import magic

and be on your way. pylibmagic is designed to be very minimal and lightweight.

Compiling

$ docker run -it --rm -v $PWD:/home/root -w /home/root ubuntu
# apt install cmake autoconf automake libtool build-essential git python3-dev python3-pip
# cmake -S . -B build
# cmake --build build

Installing

$ python3 -m pip install pylibmagic

and the libraries are installed at

$ python -c "import pylibmagic; print(pylibmagic.data)"

Releasing

To release, due to concurrency issues, we need to push the tag after Cirrus CI finishes with the building for pushing to the main branch. So the order is typically:

tbump 0.5.0 --no-tag-push
# wait until Cirrus CI finishes
git push origin v0.5.0
# wait until Cirrus CI finishes
gh release create

See [cirruslabs/cirrus-ci-docs#1167](cirruslabs/cirrus-ci-docs#1167) for more details.