Crash when using importlib.metadata.version

[gsemet]

Hi

When using

from importlib.metadata import version
version("name_of_my_package")

I get a crash importlib.metadata.PackageNotFoundError: No package metadata was found for name_of_my_package

I first create the wheel of my package and then create the

   zipapps --output dist/$(PACKAGE_NAME).pyz -u=AUTO
        -p '/usr/bin/env python3'
        -m name_of_my_package.cli:cli 
        -r dist/prod-requirements.txt 
        dist/name_of_my_package-*.whl

I think name_of_my_package.whl is well installed I see it in the pip install output, but it seems like the importlib does not find it when executed in the pyz generated by zipapps. It works with shiv.

[ClericPy]

try use -u=* to unzip all the files, this is similar to shiv may make some sense

[TsXor]

This is because zipapps does not include package metadata.
For example, let's run python -m zipapps -o psutil.pyz -u AUTO psutil and take a look inside generated psutil.pyz.
You'll find that only module directory psutil is present, but metadata directory (in my case psutil-5.9.2.dist-info) is missing. That's why importlib.metadata complains.
To fix that, you can use lazy install, which installs required packages at runtime.
Alternatively, you can tell zipapps to use a specific cache directory and copy package metadata to there ahead of time.