Correctly encode RECORD hashes

[dlqqq]

Description

Port of the changes in pypa/installer#141 to STB. Fixes hashes in built wheel RECORD files by correcting the hashing procedure to conform to PEP 376 specifications.

Verification

1. Checkout this branch locally, bump the minor version in src/sphinx_theme_builder/__init__.py::__version__, and run pip install -e . from the sphinx-theme-builder repository root.

2. Clone https://github.com/pydata/pydata-sphinx-theme

3. Run python -m build --no-isolation from the pydata-sphinx-theme repository root

4. Run this script from the pydata-sphinx-theme repository root and verify it does not except:

import os
from installer.sources import WheelFile

WHEEL_RELPATH = 'dist/pydata_sphinx_theme-0.13.2.dev0-py3-none-any.whl'

wheel_abspath = os.path.join(os.path.dirname(__file__), WHEEL_RELPATH)

with WheelFile.open(wheel_abspath) as source:
    source.validate_record()

Next steps

This is an upstream transitive dependency of LangChain and Jupyter AI, which are significant community efforts. A release should quickly follow upon merge.

[dlqqq]

There should also be unit tests to validate this behavior, but that should not block this PR from being merged.

[pradyunsg]

Thanks @dlqqq! I literally had a patch for this yesterday evening, but this is good-enough. :)

[dlqqq]

@pradyunsg Anything blocking a 0.2.0b2/0.3.0 release today?

[pradyunsg]

The lack of free time on my end. I'll try to find some. :)

[dlqqq]

@pradyunsg I understand you're busy, but do you think you could spare 10 minutes today to cut a release? Again, this is a transitive dependency of a lot of other projects in the Python ecosystem, so quick action would be appreciated 🤗

I can assist in this as well, but I'm not sure if you're comfortable with assigning me any privileges as a first-time contributor.

[dlqqq]

@pradyunsg ^?