Pex

__pex__` import hook.

* Eliminate warnings for default use. (2188)
* Cleanup sys.path after __pex__ is imported. (2189)

can't. To turn the need to fall back to older Pip from a warning into a
hard error you can also specify `--no-allow-pip-version-fallback`.

The `pex3 lock update` command now gains the ability to update just the
index and find links repos the lock's artifacts originate from by using
a combination of `--no-pypi`, `--index` & `--find-links` along with
`--pin` to ensure the project versions stay pinned as they are in the
lockfile and just the repos they are downloaded from is altered. Consult
the CLI `--help` for `--fingerprint-mismatch {ignore,warn,error}` to
gain more control over repo migration behavior.

There are several bug fixes as well dealing with somewhat esoteric
corner cases involving changing a PEX `--layout` from one form to
another and building artifacts using certain interpreters on macOS 11.0
(aka: 10.16).

* Add support for Pip 22.2.2. (1893)
* Make lock update sensitive to artifacts. (1887)
* Ensure locally built wheel is consumable locally. (1886)
* Ensure `--output` always overwrites destination. (1883)

This release fixes Pex to respect lock file interpreter constraints and
target systems when downloading artifacts.

* Fix lock downloads to use all lock info. (2396)

This release introduces `pex3 lock sync` as a higher-level tool that
can be used to create and maintain a lock as opposed to using a
combination of `pex3 lock create` and `pex3 lock update`. When there is
no existing lock file, `pex3 lock sync --lock lock.json ...` is
equivalent to `pex3 lock create --output lock.json ...`, it creates a
new lock. On subsequent uses however,
`pex3 lock sync --lock lock.json ...` updates the lock file minimally to
meet any changed requirements or other changed lock settings.

This release also fixes `pex --no-build --lock ...` to work with lock
files also created with `--no-build`. The known case here is a
`--style universal` lock created with `--no-build` to achieve a
wheel-only universal lock.

This release includes a fix to clarify the conditions under which
`--requierements-pex` can be used to combine the third party
dependencies from a pre-built PEX into a new PEX; namely, that the PEXes
must use the same value for the `--pre-install-wheels` option.

Finally, this release fixes `pex3 venv` to handle venvs created by
Virtualenv on systems that distinguish `purelib` and `platlib`
site-packages directories. Red Hat distributions are a notable example
of this.

* Implement pex3 lock sync. (2373)
* Guard against mismatched `--requirements-pex`. (2392)
* Fix `pex --no-build --lock ...`. (2390)
* Fix Pex to handle venvs with multiple site-packages dirs. (2383)

This release fixes `pex3 lock create` to handle `.tar.bz2` and `.tgz`
sdists in addition to the officially sanctioned `.tar.gz` and (less
officially so) `.zip` sdists.

* Handle `.tar.bz2` & `.tgz` sdists when locking. (2380)

This release trims down the size of the Pex wheel on PyPI and the
released Pex PEX by about 20KB by consolidating image resources.

This release also fixes the release process to remove a window of time
when several links would be dead on at https://docs.pex-tool.org that
pointed to release artifacts that were not yet fully deployed.

* Fix release ordering of the doc site deploy. (2369)
* Trim embedded doc image assets. (2368)