pex 2.10.0

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2.10.0

This release adds support for injecting requirements into the isolated
Pip PEXes Pex uses to resolve distributions. The motivating use case
for this is to use the feature Pip 23.1 introduced for forcing
--keyring-provider import.

Pex already supported using a combination of the following to force
non-interactive use of the keyring:

1. A keyring script installation that was on the PATH
2. A --pip-version 23.1 or newer.
3. Specifying --use-pip-config to pass --keyring-provider subprocess
   to Pip.

You could not force --keyring-provider import though, since the Pips
Pex uses are themselves hermetic PEXes without access to extra
installed keyring requirements elsewhere on the system. With
--extra-pip-requirement you can now do this with the primary benefit
over --keyring-provider subprocess being that you do not need to add
the username to index URLs. This is ultimately because the keyring CLI
requires username whereas the API does not; but see
https://pip.pypa.io/en/stable/topics/authentication/#keyring-support for
more information.

• Add support for --extra-pip-requirement. (#2461)