Upgrade Pex to Pip 20.3.1. #1133
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Since Pip now natively supports passing multiple --platform options on the download CLI, the only adjustments needed were to remove the --headers and --cache-ttl support that was provided by a custom patch that never made it into Pip due to security concerns as well as an adjustment to the wheel install code due to the 2020-resolver being more strict. A new option is added to toggle between the legacy-resolver and the new 2020-resolver with the legacy-resolver being used by default to allow Pex users to transition. A follow-up release will add a deprecation notice / warning for those still using the legacy-resolver.
stuhood
approved these changes
Dec 14, 2020
This was referenced Dec 14, 2020
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Since Pip now natively supports passing multiple --platform options on
the download CLI, the only adjustments needed were to remove the
--headers and --cache-ttl support that was provided by a custom patch
that never made it into Pip due to security concerns as well as an
adjustment to the wheel install code due to the 2020-resolver being more
strict.
A new --resolver-version option is added to toggle between the
legacy-resolver and the new 2020-resolver with the legacy-resolver being
used by default to allow Pex users to transition. A follow-up release
will add a deprecation notice / warning for those still using the
legacy-resolver.