[Bug 1967920] Re: sysconfig installation scheme change breaks stuff

[Benjamin Bach]

This also affects the layout of new virtual environments, which causes
many tools to not locate Python and pip executables.

This breaks popular tools like pre-commit and virtualenvwrapper because
they assume that the virtualenv looks like the posix_prefix.

See:
https://github.com/pre-commit/pre-commit/issues/2336
https://github.com/bernardobarreto/virtualenvwrapper/issues/20


** Bug watch added: github.com/pre-commit/pre-commit/issues #2336
   https://github.com/pre-commit/pre-commit/issues/2336

** Bug watch added: github.com/bernardobarreto/virtualenvwrapper/issues #20
   https://github.com/bernardobarreto/virtualenvwrapper/issues/20

** Patch added: "venv-patch.diff"
   https://bugs.launchpad.net/ubuntu/+source/python3.10/+bug/1967920/+attachment/5632122/+files/venv-patch.diff

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https://bugs.launchpad.net/bugs/1967920

Title:
  sysconfig installation scheme change breaks stuff

Status in python3.10 package in Ubuntu:
  Confirmed
Status in python3.10 source package in Jammy:
  Confirmed

Bug description:
  the 3.10 version of python in debian and ubuntu appears to have changed its installation scheme from 'posix_prefix' to the debian-specific 'posix_local', which breaks things, for example meson is no longer buildable:
  https://launchpadlibrarian.net/595057055/buildlog_ubuntu-jammy-amd64.meson_0.61.2-1_BUILDING.txt.gz

  I suspect the problem is an incomplete patching of python to correctly
  use the 'local' path, as (for example) distutils/setuptools doesn't
  appear to be using the new 'local' path (in the above build output,
  search for 'test_meson_installed' to see the failure of meson getting
  installed to the sysconfig 'scripts' path, which is now
  '/usr/local/bin' instead of '/usr/bin').

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