Fix absolute base python paths conflicting

[gaborbernat]

Signed-off-by: Bernát Gábor bgabor8@bloomberg.net

[hroncok]

Hello. Is it expected that this breaks extensions who implement this abstract class?

See fedora-python/tox-current-env#77

[gaborbernat]

yes, sadly I don't have a better option to add new abstract methods here

[hroncok]

When reviewing fedora-python/tox-current-env#78 @frenzymadness found out that is_64 is always True:

Fedora Rawhide i686

>>> sys.maxsize
2147483647
>>> 2**32
4294967296
>>> sys.maxsize != 2**32
True

Fedora Rawhide x86_64

>>> sys.maxsize
9223372036854775807
>>> 2**32
4294967296
>>> sys.maxsize != 2**32
True

https://docs.python.org/3/library/platform.html#platform.architecture says:

To get at the “64-bitness” of the current interpreter, it is more reliable to query the sys.maxsize attribute:

is_64bits = sys.maxsize > 2**32

Fedora Rawhide i686

>>> sys.maxsize > 2**32
False

Fedora Rawhide x86_64

>>> sys.maxsize > 2**32
True

[gaborbernat]

Ah good catch both. can you put in a PR to fix it 😅

[hroncok]

I am working on it. I assume you intended a string like cpython3.13-64.

[gaborbernat]

That is correct, thank you.

[hroncok]

Drafted #3327 -- waiting for the CI to validate it.

[hroncok]

@frenzymadness also pointed out that the string ends with a boolean, like ...313-True, while according to a PATTERN in virtualenv:

https://github.com/pypa/virtualenv/blob/95c5eed96c225faff01ac2f108368e0c4303989b/src/virtualenv/discovery/py_spec.py#L8

PATTERN = re.compile(r"^(?P<impl>[a-zA-Z]+)?(?P<version>[0-9.]+)?(?:-(?P<arch>32|64))?$")

It should probably end with -32 or -64 if we care about the 32/64bitness.

Moreover, when testing this assumption, I found out that the entire string is probably completely bogus:

>>> ver, is_64 = sys.version_info, sys.maxsize != 2**32
>>> f"{sys.implementation}{ver.major}{ver.minor}-{is_64}"
"namespace(name='cpython', cache_tag='cpython-313', version=sys.version_info(major=3, minor=13, micro=0, releaselevel='candidate', serial=1), hexversion=51183809, _multiarch='x86_64-linux-gnu')313-True"

We probably want to replace sys.implementation with sys.implementation.name if cpython313-64 is what you intended.