pip-sync re-installs the typing-extensions every time

[rgg-fjaite]

When typing-extensions is present as a requirement, pip-sync can't match the distribution and the install requirement and that triggers a re-install of the lib.

Not sure this was the right way to address the mismatch, but canonicalizing the returned key here makes is work:

from pip._vendor.packaging.utils import canonicalize_name
...
def diff_key_from_req(req: Distribution) -> str: 
    ...
    return canonicalize_name(key)

Environment Versions

1. OS Type
2. Python version: 3.11.4 (CPython)
3. pip version: 23.3.2
4. pip-tools version: pip-compile, version 7.0.0

Steps to replicate

requirements.txt:

typing-extensions==4.8.0

1. pip uninstall typing-extensions
2. pip-sync requirements.txt
3. Verify it would uninstall and install the same package with pip-sync -nv requirements.txt

Expected result

Everything up-to-date

Actual result

Would uninstall:
  typing_extensions
Would install:
  typing-extensions==4.8.0

[rgg-fjaite]

Upgraded pip-tools to 7.3.0 and the issue is no longer there, apologies for the noise.