Add support to "alternate license files" (e.g. LICENSE.BSD, LICENSE.APACHE) --with-license-file

[joao-dgg]

The packaging module has multiple licenses, Apache and BSD. When using the --with-license-file with the module in question, the result is as follow:

packaging
24.0
Apache Software License; BSD License
This software is made available under the terms of either of the licenses
found in LICENSE.APACHE or LICENSE.BSD. Contributions to this software is made
under the terms of both these licenses.

Checking the .whl of said package, there are three license files in total: LICENSE (which is the text quoted above), LICENSE.BSD and LICENSE.APACHE.

I assume pip-licenses currently does not support said 'alternate' or additional files? Or is there a flag I might have missed?

Apologies on ahead if the title is unclear, but I wasn't sure how else to name it.

[joao-dgg]

Checking the changelog, I see that a specific file is chosen, or at least this used to be the case. Would there be any way to go with "all" LICENSE* files?

[stefan6419846]

This has been proposed in #78 already, but closed for now. The reason is that

pip-licenses/piplicenses.py

Lines 209 to 218 in 6176cc5

	for rel_path in matched_rel_paths:
	abs_path = Path(pkg.locate_file(rel_path))
	if not abs_path.is_file():
	continue
	included_file = str(abs_path)
	with open(
	abs_path, encoding="utf-8", errors="backslashreplace"
	) as included_file_handle:
	included_text = included_file_handle.read()
	break

breaks on the first file.