After this commit, when both modules are imported:

- if pyproject is imported before, the warning is 'pypi-uri' is
deprecated, use '(@ (guix build-system pyproject) pypi-uri)' instead

- if python is imported before, the warning is `pypi-uri' imported from
both (guix build-system python) and (guix build-system pyproject)

This seems convenient enough to warn for deprecation in the short term,
while avoiding any breaking changes.

* guix/build-system/pyproject.scm (pypi-uri): Move the procedure from
(guix build-system python) here.

* guix/build-system/python (pypi-uri): Drop definition, import it
from (guix build-system pyproject) and deprecate it.

* gnu/packages/openldap.scm: Reorder modules to get the right warning.

* gnu/packages/pypy.scm: Likewise.

* gnu/packages/*.scm : Drop module (guix build-system python).

* tests/import/pypi.scm: Likewise.

Merges: https://codeberg.org/guix/guix/pulls/7448
Change-Id: Ib42f53bc545052eb7918a25afe9db6d5fc2cb834
Reviewed-by: Nguyễn Gia Phong <cnx@loang.net>
Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>

* gnu/packages/digest.scm (python-tdigest): New variable.

Change-Id: I55f719e87dabdf912525c8a2457a8e07661626ac
Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>

* gnu/packages/digest.scm (xxhash): Update to 0.8.3.
[arguments]<#:make-flags>: Remove build-time detection of vector instruction
set because it is now automatically detected during runtime.

Change-Id: I84a0171156dbcf6755fc503007eb51f066b72746
Signed-off-by: Andreas Enge <andreas@enge.fr>

* gnu/packages/digest.scm (python-xxhash): Update to 3.5.0.
[arguments] <test-backend>: Use 'unittest.
<phases>: Add 'build-extensions.
[native-inputs]: Remove python-setuptools-scm and python-wheel.

Change-Id: I7f4f5e3f06886318ec11ad3064aba381b7b1245f

Also adds python-setuptools and python-wheel to relevant packages,
either to native-inputs or to propagated inputs if the pkg_resources
Python module is loaded at runtime.

* guix/build-system/pyproject.scm (default-python): Default to
python-sans-pip-wrapper.

Change-Id: I2d986c2225114f54459dd6bb360913106e52cdf4

* gnu/packages/digest.scm (xxhash): Update to 0.8.2.
[arguments]: Remove obsolete build phase 'fix-man-page-links'.

Change-Id: I43b10dd18c70c21de8de50336dfef9f8125519f7

* gnu/packages/digest.scm (python-xxhash): Update to 3.1.0.
[build-system]: Use pyproject-build-system.
[native-inputs]: Add python-setuptools-scm.

* gnu/packages/digest.scm (xxhash)[arguments]:
Rewrite as G-expressions.

* gnu/packages/digest.scm (xxhash): Update to 0.8.1.
[arguments]: Add a new 'fix-man-page-links phase.

* gnu/packages/digest.scm (python-xxhash): New variable.