* Remove reference to utcnow
This cleans up some of the datetime handling in the self check.
Note that this changes the format of the state file, since the datetime
now uses ``.isoformat()`` instead of ``.strftime``. Reading an outdated
state file will still work on Python 3.11+, but not on earlier versions.
* Use aware datetime object in x509.CertificateBuilder
The modern virtual environment structure does not allow us to enable
"fake user site" while disabling the global site, so we need to do more
fine-grained configuration to correctly set up test environments for
each test case.
With this done, we can also properly support the stdlib venv ad the test
environment backend, since it basically works identically with modern
virtualenv. The incompatible_with_test_venv is thus removed.
See #11276
SearchScope was extended with an extra parameter to be able to pass-on the
value of no_index as we do with the other parameters. This allows us to respect
its value regardless of the order in which options are evaluated.
The approach it uses now doesn't work anymore due to 452d7da8.
The installation of `fake_dep` now succeeds whether or not `setuptools`
is installed in the test environment.
Use a different approach instead: try to import `pip` in the `setup.py`
script. If it succeeds, then we are not running in an isolated environment,
and therefore PEP 517 isn't being used.
To add this custom logic to `setup.py`, add a new argument to
`create_basic_sdist_for_package`. Note that to make this work, I had to
switch from f-strings to `str.format`, since the `dedent` has to happen
before formatting.
The pip-specific Path implementation has been removed, and all its
usages replaced by pathlib.Path. The tmpdir and tmpdir_factory fixtures
are also removed, and all usages are replaced by tmp_path and
tmp_path_factory, which use pathlib.Path.
The pip() function now also accepts pathlib.Path so we don't need to put
str() everywhere. Path arguments are coerced with os.fspath() into str.
These were intended to help users transition when the default behaviour
changed to no longer perform out-of-tree builds. The transition is now
considered complete.
The html5lib library isn't strictly required as the same functionality
can be achieved through the stdlib html.parser module.
The html5lib is one of the largest uses of the six library. By dropping
this unnecessary dependency, the pip project is closer to dropping the
six library.
Additionally, html5lib maintenance has slowed down and the project has
rejected pull requests to drop Python 2 support.
For now, the html5lib code remains, but is gated behind a command
line option: `--use-deprecated=html5lib`. After a sufficient amount of
time has passed without any reported bugs, the vendored library and this
flag can be removed completely.
This behaviour is more forgiving when a source distribution cannot be
installed (eg: due to missing build dependencies or platform
incompatibility) and favours early eager failures instead of trying to
ensure that a package is installed regardless of the amount of effort it
takes.
