Commits on Aug 26, 2024

1. Drop run-time version constraints for modern pip …

   Modern pip (v9.0.0+) supports `Requires-Python` and so automatically
   takes the current Python version into account, when determining the
   latest version of packages that can be installed.
   
   As such, for modern pip we don't need to specify version range
   constraints for the pip/setuptools/wheel versions passed to the
   `pip install` at `get-pip.py` run-time.
   
   This is the first step towards being able to remove `SCRIPT_CONSTRAINTS`
   and rely purely on `Requires-Python` metadata, per:
   pypa#88 (comment)
   
   I've intentionally left the "figure out what pip version to embed in the
   template" part of template generation alone for now to keep the PR
   smaller, and have only changed the run-time `pip install` parts.
   
   I had to add a new `pre-9.py` template file (created as a copy of
   `pre-10.py`), since it's only pip<9 that needs the various version
   constraint references in the template (and otherwise anything else that
   used `pre-10.py`, such as Python 2.6, would have had redundant version
   constraints). The new `pre-9.py` template is only used for Python 3.2.

   

   edmorley committed Aug 26, 2024
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