"add c:\path\to\file.whl" causes AssertionError because path is not converted to Posix

[dvht]

Poetry version: 1.7.1
Python version: 3.12.1
OS version and name: Microsoft Windows [Version 10.0.19045.3803]

On windows adding a dependency via the full path name to a wheel file fails if the path is not in posix format. In my case, the drive letter was lowercase and and uppercase was expected. In the gist https://gist.github.com/dvht/68df196a22d93b2d62871b98419f5ceb I created an example from scratch and it contains the stack trace to the AssertionError

Howerver I debugged with the latest master ( 2024-01-03, https://github.com/dvht/poetry) and found that in poetry-core specification.py the the uppercase source_url string (posix converted name) is compared with the lowercase source_url string (command argument) and decided as not equal. This not expected since the same package and fails.

I log this here because I think the input could be sanitized with Path(argument).resolve().as_posix() somewhere near the start