leifdreizler commented on PR #53828:
URL: https://github.com/apache/airflow/pull/53828#issuecomment-3145418657
**Core Metadata**
What is found in the `.whl` file on PyPI
- `License` (deprecated)
- `License-Expression` (added)
- `License-File` (added)
**Project Metadata**
What is found in the repo's manifest file
- license key table, e.g. `license = {text = "BSD-3-Clause"}` or `license =
{file = "LICENSE"}` (deprecated)
- `license` string (added)
- `license-files` (added)
Examples of deprecated `license` with subkeys:
- Version 3.0.1 of flask demonstrates the [file
subkey](https://github.com/pallets/flask/blob/3.0.1/pyproject.toml#L6)
- Django uses the old [text
subkey](https://github.com/django/django/blob/main/pyproject.toml#L19)
The latest version of flask uses the `license` string and `license-files`
keys [as seen
here](https://github.com/pallets/flask/blob/3.1.1/pyproject.toml#L6-L7)
If you download and unzip the `.whl` file for the latest version of [Flask
from PyPI](https://pypi.org/project/Flask/#files), you'll see the following
metadata:
```
Metadata-Version: 2.4
Name: Flask
Version: 3.1.1
Summary: A simple framework for building complex web applications.
Maintainer-email: Pallets <[email protected]>
Requires-Python: >=3.9
Description-Content-Type: text/markdown
License-Expression: BSD-3-Clause
License-File: LICENSE.txt
```
which matches the [PyPI API response for
Flask](https://pypi.org/pypi/flask/json). As you can see, the Project Metadata
is creating the correct Core Metadata. `license` is null and
`license_expression` and `license_files` are correctly populated.
```
"license": null,
"license_expression": "BSD-3-Clause",
"license_files": [
"LICENSE.txt"
],
```
I believe this will work for y'all as well. What do you think?
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