IDNA package source installation is broken in Poetry - Adhere to PEP-721

[danni-m]

Poetry follows the new PEP-721 (https://peps.python.org/pep-0721/), forcing source packages to be extracted with "data_filter".

This causes Poetry to fail source distribution installation for IDNA (python-poetry/poetry#8645).

[kjd]

It appears the source of this issue is that idna/tools/intranges.py is a symlink to ../idna/intranges.py, which involves backward traversal one level that doesn't escape the source tree. According to PEP-721, "Tools MAY treat them as [invalid], but are NOT REQUIRED to do so". It seems like Poetry treats this as a violation.

Perhaps the idna-data can be refactored to not require this symlink, but I don't immediately see a security issue underlying the current composition.

[kjd]

Should now be fixed by using another strategy to import without using a backward traversing symlink